Varistors (ZNR Surge Absorber)
SMD type
VF series
Features
●Large withstanding surge current capability in compact sizes
●Designed for flow/reflow solderings
●Low clamping voltage
●RoHS compliant
Recommended applications
●Protection of communication modules (Modem, xDSL, Terminal Adopter)
●Protection of consumer, industrial equipment
●Absorption of switching surge from relays
■ As for handling precautions and minimum quantity / Packing unit please see related information.
Applicable Standards
●CQC（GB/T10193，GB/T10194）
Registered in "Panasonic Part No."
Explanation of part numbers
1
2
3
4
5
6
Ｅ
Ｒ
Ｚ
V
F
Series
Product Code
7
8
9
M
10
11
Design No.
Norminal
Varistor Voltage
Construction
12
Packaging style
1
Bulk
2
Taping
Construction
④
②
③
①
① ZNR element
ZnO etc.
② Resin mold
Epoxy Resin(UL94V-0 approved)
③ Conductive adhesive
Silver
④ Electrode
Silver
⑤ Lead terminals
Sn plated Ni-Fe Alloy
⑤
Dimensions in mm (not to scale)
H
Unit : mm
S
S
L
Part No.
W
L
H
S
E
ERZVF□M□□□
6.0±0.4
8.0±0.5
3.2±0.3
1.3±0.3
2.5±0.2
E
W
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
14-Dec-20
SMD type / VF series
Ratings and characteristics
●Operating temperature range : -40 to 85 ℃
Part No.
ERZVF□M220
ERZVF□M270
ERZVF□M330
ERZVF□M390
ERZVF□M470
ERZVF□M560
ERZVF□M680
ERZVF□M820
ERZVF□M101
ERZVF□M121
ERZVF□M151
ERZVF□M201
ERZVF□M221
ERZVF□M241
ERZVF□M271
ERZVF□M331
ERZVF□M361
ERZVF□M391
ERZVF□M431
ERZVF□M471
↑
Varistor
voltage
at 1 ｍＡ
●Storage temperature range : ‒40 to 125℃
Maximum
allowable voltage
(Ｖ)
ACrms (Ｖ)
DC (Ｖ)
(Ｖ)
22(20 to 24)
14
17
20
25
30
35
40
50
60
75
95
130
140
150
175
210
230
250
275
300
18
22
26
31
38
45
56
65
85
100
125
170
180
200
225
270
300
320
350
385
43
53
65
77
93
110
135
135
165
200
250
340
360
395
455
545
595
650
710
775
27(24 to 30)
33(30 to 36)
39(35 to 43)
47(42 to 52)
56(50 to 62)
68(61 to 75)
82(74 to 90)
100(90 to 110)
120(108 to 132)
150(135 to 165)
200(185 to 225)
220(198 to 242)
240(216 to 264)
270(247 to 303)
330(297 to 363)
360(324 to 396)
390(351 to 429)
430(387 to 473)
470(423 to 517)
Rated
power
Maximum
energy
(2 ms)
Maximum
peak current
(A)
(W)
(J)
(A)
2.5
2.5
2.5
2.5
2.5
2.5
2.5
10
10
10
10
10
10
10
10
10
10
10
10
10
0.02
0.02
0.02
0.02
0.02
0.02
0.02
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.1
0.1
0.1
0.1
0.1
0.9
1.0
1.2
1.5
1.8
2.2
2.5
3.5
4.0
5.0
6.0
8.0
9.0
10.0
12.0
8.0
9.0
9.0
10.0
10.0
125
125
125
125
125
125
125
600
600
600
600
600
600
600
600
300
300
300
300
300
Clamping
voltage at Ip
(max.)
Measuring current
(8/20μs,
2 times)
Packaging Style Code: “1” for bulk, “2” for embossed taping
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
14-Dec-20
SMD type / VF series
Typical characteristics
Voltage vs. Current
Impulse Derating (Relation between
impulse width and impulse current multiple)
ERZVF1(2)M220 to ERZVF1(2)M680
Max.Leakage
Current
300
200
Max.Clamping Voltage
300
680
560
200
Voltage (V)
2 times：5 min. interval
up to 10 times：2 min. interval
up to 106 times : 10 sec. interval
100
Impulse current (A)
400
ERZVF1(2)M220 to ERZVF1(2)M680
470
390
330
100
90
80
70
60
50
270
220
50
40
30
20
10
5
4
3
2
1
0.5
0.4
0.3
0.2
40
30
0.1
20
20
390
330
4
10000
2000
10-5
10-4
10-3
10-2
10-1
100
101
102
103
1000
Impulse current (A)
ERZVF1(2)M820 to ERZVF1(2)M471
Max.Leakage
Current
2 times：5 min. interval
up to 10 times：2 min. interval
up to 106 times : 10 sec. interval
500
400
300
200
104
Current (A)
2000
1000
ERZVF1(2)M820 to ERZVF1(2)M271
Test current waveform
10–6 to 10–3 A: Direct current
10–1 to 103 A: 8/20 μs
5
3
10-6
100
Impulse width (μs)
10
9
8
7
6
100
50
40
30
20
10
5
4
3
2
1
Max.Clamping Voltage
0.1
20
100
1000
10000
Impulse width (μs)
471
431
391
361
431
391
ERZVF1(2)M331 to ERZVF1(2)M471
1000
271
241
221
201
500
400
151
300
121
200
820
2 times：5 min. interval
up to 10 times：2 min. interval
up to 106 times : 10 sec. interval
Impulse current (A)
Voltage (V)
1000
900
800
700
600
101
100
90
80
70
60
30
10-6
10
1
Test current waveform
10–6 to 10–3 A: Direct current
10–1 to 104 A: 8/20 μs
50
40
100
241
221
10-5
0.1
10-4
10-3
10-2
10-1
100
101
102
103
104
20
Current (A)
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
100
1000
10000
Impulse width (μs)
14-Dec-20
SMD type / VF series
Marking contents
ZNR
VFM
□□
②
③
ZNR Surge Absorbers
①Product Name
①
VF□M VF Series
② Series
The first two digits are signifi cant figures and the third one denotes
③ Abbreviation of
Part No.
01
the number of zeros following.
Left✽ (Year) 2019:9, 2020:K, 2021:A, 2022:B, 2023:C, 2024:D
Right(Month) Jan. to Sep.:1 to 9, Oct.:O, Nov.:N, Dec.:D
④Date Code
④
* If the 10's digit of a Christian year is an even year, as an end abbreviation, an
alphabetic character is used.
1 : A, 2 : B, 3 : C, 4 : D, 5 : E, 6 : F, 7 : G, 8 : H, 9 : J, 0 : K
If the 10's digit of a Christian year is an odd year, as an end abbreviation, a number is used.
Minimum quantity
●Packing Quantity
Product
Series / Type
“ZNR”
Transient/surge
absorbers
SMD
type
Minimum quantity
/ Packing unit
Part number
Packing quantity
in carton
Carton (about)
L×W×H (mm)
Bulk (VF)
ERZVF1
200
2000
210×340×80
Embossed (VF)
ERZVF2
2000
6000
340×345×75
※ Part No., quantity and country of origin are designated on outer packages in English.
※ Please contact local sales office about packing specifications.
●Reel
●Embossed Taping
T
E
W=16ｍｍ
Feeding hole
ｔ1
Ｂ
øＤ0
r
D
Chip pocket
Ｐ2 Ｐ0
Ｅ
C
Ｂ
Ｗ
Ｆ
A
W
A
ｔ2
t
Chip component
Ｐ1
Tape running drunning
(not to scale)
Unit : mm
Unit : mm
Part No.
Ａ
Ｂ
Ｃ
Part No.
Ａ
Ｂ
Ｗ
ERZVF□M□□□
382 max.
50 min.
13.0±0.5
ERZVF□M□□□
6.8±0.2
11.9 max.
16.0±0.3
Part No.
Ｄ
Ｅ
Ｗ
Part No.
Ｆ
Ｅ
Ｐ1
ERZVF□M□□□
7.5±0.10
1.75±0.10
8.0±0.1
øＤ0
ERZVF□M□□□
21.0±0.8
2.0±0.5
Part No.
Ｔ
ｔ
ｒ
Part No.
Ｐ2
Ｐ0
2.5±0.5
1.0
ERZVF□M□□□
2.0±0.1
4.0±0.1
Part No.
ｔ1
ｔ2
ERZVF□M□□□
0.6 max.
6.5 max.
ERZVF□M□□□ 22.4 max.
16.4
+2.0
..0
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
1.5
+0.1
..0
14-Dec-20
SMD type / VF series
Performance characteristics
Characteristics
Standard test condition
Varistor voltage
Maximum
allowable voltage
Clamping voltage
Rated power
Maximum energy
Maximum
peak current
(Withstanding surge
current)
Temperature coefficient
of varistor voltage
Test methods
Specifications
Electrical measurements (initial/after tests) shall be conducted at temperature of 5 to
35 ℃, relative humidity of maximum 85 %.
The voltage betwen two terminals with the specified measuring current 1 mA
DC applied is called V1 or V1 mA. The measurement shall be made as fast as
possible to avoid heat affection.
The maximum sinusoidal RMS voltage or maximum DC voltage that can be
applied continuously.
The maximum voltage between two terminals with the specified
standard impulse current (8/20 μs) illustrated below applied.
The power that can be applied in the specified ambient temperature.
―
To meet the
specified value.
Maximum energy of less than ±10 % of the varistor voltage
change when the standard impulse (2 ms) is applied one time.
Maximum current of less than ±10 % of the varistor voltage change
when impulse current (8/20 μs) is applied twice continuously with an interval
of 5 minutes.
V1 mA at 85 ℃ −V1 mA at 25 ℃
V1 mA at 25 ℃
×
1
60
0 to ‒0.05 %/℃
× 100(%/℃)
The change of Vc shall be measured after the specified impulse is
applied 10000 times continuously with an interval of 10 seconds at room
temperature.
Impulse life（Ⅰ）
Part No.
Waveform
Current
ERZVF□M220 to ERZVF□M680
8/20 μs
18Ａ
ERZVF□M820 to ERZVF□M271
8/20 μs
50Ａ
ERZVF□M331 to ERZVF□M471
8/20 μs
30Ａ
ΔV1 mA/V1 mA ≦±10 %
The change of Vc shall be measured after the specified impulse is
applied 10000 times continuously with an interval of 10 seconds at room
temperature.
Impulse life（Ⅱ）
Part No.
Waveform
Current
ERZVF□M220 to ERZVF□M680
8/20 μs
12Ａ
ERZVF□M820 to ERZVF□M271
8/20 μs
35Ａ
ERZVF□M331 to ERZVF□M471
8/20 μs
20Ａ
ΔV1 mA/V1 mA ≦±10 %
Recommendation land size
Land
8.0
6.0
3.0
Product
5.0
10.0
Occupied
Space
Unit : mm
Design and specifications are each subject to change without notice. Ask factory for the current technical specifications before purchase and/or use.
Should a safety concern arise regarding this product, please be sure to contact us immediately.
14-Dec-20
Safety and Legal Matters to Be Observed
Safety and Legal Matters to Be Observed
Product specifications and applications
■ Please be advised that this product and product specifications are subject to change without notice for
improvement purposes. Therefore, please request and confirm the latest delivery specifications that explain
the specifications in detail before the final design, or purchase or use of the product, regardless of the
application. In addition, do not use this product in any way that deviates from the contents of the company's
delivery specifications.
■ Unless otherwise specified in this catalog or the product specifications, this product is intended for use in
general electronic equipment (AV products, home appliances, commercial equipment, office equipment,
information and communication equipment, etc.).
When this product is used for the following special cases, the specification document suited to each application
shall be signed/sealed (with Panasonic and the user) in advance..These include applications requiring special
quality and reliability, wherein their failures or malfunctions may directly threaten human life or cause harm to
the human body (e.g.: space/aircraft equipment, transportation/traffic equipment, combustion equipment,
medical equipment, disaster prevention/crime prevention equipment, safety equipment, etc.).
Safety design and product evaluation
■ Please ensure safety through protection circuits, redundant circuits, etc., in the customer's system design so
that a defect in our company's product will not endanger human life or cause other serious damage.
■ This catalog shows the quality and performance of individual parts. The durability of parts varies depending on
the usage environment and conditions. Therefore, please ensure to evaluate and confirm the state of each part
after it has been mounted in your product in the actual operating environment before use.
If you have any doubts about the safety of this product, then please notify us immediately, and be sure to conduct
a technical review including the above protection circuits and redundant circuits at your company.
Laws / Regulations / Intellectual property
■ The transportation of dangerous goods as designated by UN numbers, UN classifications, etc., does not apply
to this product. In addition, when exporting products, product specifications, and technical information described
in this catalog, please comply with the laws and regulations of the countries to which the products are exported,
especially those concerning security export control.
■ Each model of this product complies with the RoHS Directive (Restriction of the use of hazardous substances in
electrical and electronic equipment) (2011/65/EU and (EU) 2015/863). The date of compliance with the RoHS
Directive and REACH Regulation varies depending on the product model.
Further, if you are using product models in stock and are not sure whether or not they comply with the RoHS
Directive or REACH Regulation, please contact us by selecting "Sales Inquiry" from the inquiry form.
■ During the manufacturing process of this product and any of its components and materials to be used,
Panasonic does not intentionally use ozone-depleting substances stipulated in the Montreal Protocol and
specific bromine-based flame retardants such as PBBs (Poly-Brominated Biphenyls) / PBDEs (Poly-Brominated
Diphenyl Ethers). In addition, the materials used in this product are all listed as existing chemical substances
based on the Act on the Regulation of Manufacture and Evaluation of Chemical Substances.
■ With regard to the disposal of this product, please confirm the disposal method in each country and region
where it is incorporated into your company's product and used.
■ The technical information contained in this catalog is intended to show only typical operation and application
circuit examples of this product. This catalog does not guarantee that such information does not infringe upon
the intellectual property rights of Panasonic or any third party, nor imply that the license of such rights has been
granted.
Panasonic Industry will assume no liability whatsoever if the use of our company's
products deviates from the contents of this catalog or does not comply with the
precautions. Please be advised of these restrictions.
01-Dec-23
Matters to Be Observed When Using This Product
Matters to Be Observed When Using This Product
(D-type : V series / SMD-type : HF・VF series)
Safety measures
An abnormal state for varistors (ZNR surge absorbers) of the D type/V series and SMD-Type/HF, VF Series (hereinafter
the product or "the surge absorber") that results from a problem with service conditions (materials used, the surrounding
environment, power conditions, circuit conditions, etc.) may cause a fire accident, electric shock accident, burn accident,
or product failure. Matters to note when handling this product will hereinafter be described. What is described below should
be checked sufficiently before the product is used.
■ Confirming rated capabilities
Use the surge absorber within the range of its rated capabilities. Each type of surge absorber has specified rated
capabilities including a maximum allowable circuit voltage, a surge current tolerance, an energy tolerance, an impulse
lifespan (surge lifespan), average pulse power, and a service temperature. Using the surge absorber under severe
service conditions that are beyond the rated capabilities causes degraded performance of the surge absorber or
destruction of a circuit element, which may lead to smoke generation, ignition, etc.
■ Take the following measures in order to avoid an accident caused by expected phenomenon.
(1) Destruction of the surge absorber may scatter its fractured pieces around. To protect other elements from these
pieces, set product in a case or shield it with a cover.
(2) Do not place the surge absorber near combustible materials (vinyl cable, resin mold, etc.). If avoiding the vicinity
of combustible materials is difficult, protect the combustible material with an incombustible cover.
(3) Surge absorber placed between lines
When the surge absorber is placed between lines, connect a normal type current fuse in series with the surge
absorber.
* See "Current fuse" in the "Circuit design and circuit board design" section.
(4) Surge absorber placed between a line and the ground
① When the surge absorber is placed between a line and the ground, even if the surge absorber short-circuits,
ground resistance will remain in the section between the line and the ground, leaving a possibility that the
current fuse won’t blow, in which case the outer sheath resin of the surge absorber may generate smoke or
ignite due to current flow. To prevent such a case, place an earth leakage breaker in a location closer to the
power supply than the surge absorber. When not using an earth leakage breaker, use a current fuse and
temperature fuse in series with each other.
* See Table 1 in the "Circuit design and circuit board design" section.
② When the surge absorber is placed between a live part and a metal case, it may cause electric shock if the
surge absorber short-circuits. To avoid this, ground the metal case or shield it to prevent direct contact with the
metal case.
■ In case the surge absorber should short-circuit and generate smoke or ignite, immediately cut off current flow
to the surge absorber.
■ Rated voltage for UL certification, etc.
To allow the surge absorber to meet leak current requirements, etc., a maximum allowable circuit voltage and rated
voltage are specified for the surge absorber.
When applying for UL certification, etc. of a device equipped with a surge absorber, ensure the working voltage of the
device does not exceed the rated voltage of the surge absorber.
■ An unexpected sharp rise in the working voltage, an incoming excessive surge, etc., may cause the surge absorber to
generate smoke or ignite.
In such a case, fire spreading through the device should be prevented to avoid expanded damage. To achieve this,
take a multi-protection measure, such as adopting fire-resistant materials that make up the outer shell components
and structural materials.
30-Jun-23
Matters to Be Observed When Using This Product
Use environments and cleaning conditions
■ Do not use the surge absorber in an outdoor environment where the surge absorber is exposed to sunlight.
■ Do not use the surge absorber in which direct sunlight hits the surge absorber or near a heating element where the
temperature of the surge absorber would rise above its working temperature.
■ Do not use the surge absorber in a place where the surge absorber is exposed to wind or rain or a highly humid place
where steam is emitted or dew concentrates.
■ Do not use the surge absorber in a place filled with dust or salt, in an atmosphere contaminated with a corrosive gas,
etc., or in liquids such as water, oil, chemical, or organic solvents.
■ Do not wash the surge absorber with a solvent (thinner, acetone, etc.) that damages the outer sheath resin.
Response to anomalies and handling conditions
Be careful not to drop the surge absorber on the floor, etc. The product is likely to suffer mechanical or electrical damage
when dropped on the floor. Avoid using such a product.
Reliability
A capacitor conforming to "AEC-Q200" refers to a capacitor having passed some or all of evaluation test items defined
in AEC-Q200.
To know the detailed specifications of each capacitor or specific evaluation test scores, please contact us.
We issue a delivery specification sheet for each product ordered. Please confirm the delivery specification sheet when
you place an order with us.
Circuit design and circuit board design
Meet the following requirements. Not following the requirements can result in a shorter lifespan of the surge absorber or its
failure.
■ Choose a surge absorber whose maximum allowable circuit voltage has a margin relative to the maximum voltage range
including source voltage fluctuations.
* See Table 1 in the "Circuit design and circuit board design" section.
■ When surges are applied intermittently to the surge absorber at short intervals (when pulses of voltages are applied in a
noise simulator test, etc.), make sure that the surge power does not exceed the maximum average pulse power of the surge
absorber.
■ The product numbers of recommended surge absorbers to choose are shown in Table 1.
(1) The case of placing the surge absorber between lines
When the source voltage is expected to rise temporarily due to unbalanced single-wire loads in a three-phase three-wire
connection configuration, a short circuit between a voltage line and a neutral line, loss of the neutral line, or resonance of
a capacitive load caused by switching on/off, use a surge absorber (varistor) indicated by "*" in Table 1.
(2) The case of placing the surge absorber between a line and the ground
Line-to-ground voltage may rise with a single-wire ground fault, etc. Use a recommended surge absorber in Table 1 that
is different from the surge absorber placed between lines. When the device is subjected to an insulation resistance test
(500 V DC), use a D-type surge absorber indicated by "**" in Table 1.
According to "Electrical Appliance Technical Standards" based on the Electrical Appliance and Material Safety Act, when
using a varistor voltage which would fail the insulation performance test, the surge absorber may be removed from the
device when being subjected to the test, depending on circuit test conditions.
* See attached table 4, appendix 4, "Electrical Appliance Technical Standards" based on the Electrical Appliance and
Material Safety Act.
When conducting a withstand voltage test (1000 V AC or 1200 V AC) of the device, use the recommended D type /
V series surge absorber indicated by "***" in Table 1.
30-Jun-23
Matters to Be Observed When Using This Product
■ Current fuse
(1) Select a surge absorber and the rated current for a current fuse to be used in a manner shown in the following table.
Confirm that no secondary accident arises when the surge absorber in an actual circuit breaks. Selected rated currents
of current fuses shown in the following table are exemplary one and may vary depending on circuit conditions used.
Confirm the rated current by a test, etc., before using the current fuse.
Standard
product number
Rating
current
ERZV05D□□□ ERZV07D□□□ ERZV09D□□□ ERZV10D□□□ ERZV14D□□□ ERZV20D□□□
3 A max.
5 A max.
7 A max.
7 A max.
10 A max.
10 A max.
* Use the rated voltage of the current fuse that corresponds to the circuit voltage of a circuit including the current fuse.
Standard
product number
ERZVF□M□□□
Rating current
5 A max.
* Use the rated voltage of the current fuse that corresponds to the circuit voltage of a circuit including the current fuse.
* For the HF series surge absorber, select the rated current of the fuse after confirming the way the fuse handles a load dump
surge and the protective coordination action it makes when the surge absorber is destroyed.
(2) Recommended parts where fuses are connected are shown in Table 1. When a load current to a protected device is so
large as to exceed the rated current of the fuse, however, connect the fuse in a location shown in the following diagram.
Power supply
Current fuse
ZNR
Protected
device
■ Temperature fuse
When connecting the surge absorber to a temperature fuse, choose a connection method and a temperature fuse that allow
fine thermal coupling between the surge absorber and the temperature fuse.
30-Jun-23
Matters to Be Observed When Using This Product
Table 1 Application example of the product (ordinary application example)
Surge absorber placed between lines
Surge absorber placed between a line and the ground
DC
Single-phase AC
L
Current fuse
DC
Single-phase AC
Protected
device
Connection
N
Current fuse
L
ZNR1
ZNR1
Protected
device
N
ZNR2
Temperature fuse
Thermal coupling
Three-phase AC
Three-phase AC
Current fuse
Current fuse ZNR3 ZNR3
ZNR3
Protected
device
Protected
device
ZNR3
ZNR4
ZNR3
Varistor voltage selection
ZNR
ZNR 1
ZNR 3
Power supply
voltage
[AC]
Thermal coupling
Nominal varistor voltage
D-type
SMD-type
ZNR
Power supply
voltage
[AC]
Temperature fuse
Nominal varistor voltage
D-type
SMD-type
100 V
201 to 361*
201 to 361*
471
471
120 V
241 to 431*
241 to 431*
511
-
200 V
471 to 621*
471
220 V
471 to 621*
471
240 V
511、 621*
-
380 V
751、 821*
-
100 V
220 V
ZNR 2
ZNR 4
230 V
380 V
621*
-
821 or higher**
-
182***
-
511
-
621*
-
821 or higher**
-
182**
-
112**
-
182***
-
* Choose the element size while taking surge conditions into consideration.
Processing conditions
■ Do not apply vibration, impact (drop impact, etc.), or pressure strong enough to crack the outer sheath resin or absorber
body of the surge absorber.
■ When coating the surge absorber with a resin or embedding it in a resin mold, avoid using a resin that degrades the
surge absorber.
■ Do not bend or apply a force to the lead of a D-type surge absorber close to the outer sheath resin.
30-Jun-23
Matters to Be Observed When Using This Product
Mounting and storage conditions
■ When soldering the surge absorber, follow recommended soldering conditions shown in the following table so that
solder or the insulation material making up the surge absorber is not melted.
■ When making holes for mounting the surge absorber on the board, check the dimensions of the holes on the board,
referencing the central point of the interval between the leads.
Because the overall dimensional tolerance is large, forming the holes with high precision requires careful processing.
D-type
Soldering method
Recommended conditions
Flow soldering
260 ℃, 10 seconds or less
(solder bath immersion method)
Flow soldering
SMD-type
(solder bath immersion method)
Reflow soldering
(controlled atmosphere heating
method)
Mater to note
The D-type surge absorber should not be soldered by reflow
soldering.
A high component mounting density may lead to poor
260 ℃, 10 seconds or less solderability. In such a case, consider vent hole formation.
Refer to the recommended When a land is excessively larger than the terminal surface of
soldering temperature
a component, the component may shift position when solder is
profile.
melted.
Note 1: Soldering the surge absorber under soldering conditions different from the recommended soldering
conditions requires extra checking to ensure it won’t cause any problems.
Additional soldering is allowed only once. It must be done within 5 seconds, with the soldering iron
temperature kept at 400 ℃ or lower.
Note 2: A temperature profile may include a large error, depending on the measurement method used.
Be careful in such cases.
Note 3: Board temperatures vary depending on the sizes of boards and mounting densities. Confirm the
temperature for each type of board.
Heat resistance range of the
product in the reflow soldering
process
Time
Preheating part
Soldering part
Cooling part
Normal temperature
120 seconds or less
to 130 ℃
260 ℃ or less
10 seconds or less
Gradual cooling
(cooling under the normal temperature)
Cooling part
Temperature-rising part (I)
Preheating part
Temperature-rising part (II)
Temperature (°C)
Preheating part
Soldering part
Cooling part
260
Reflow soldering
(controlled atmosphere heating method)
Terminal temperature (°C)
Temperature (°C)
Flow soldering
(solder bath immersion method)
Main heating part
250
240
230
220
210
200
0
10
20
30
40
50
60
Time (s)
Time
Temperature-rising
part I
Normal temperature to
preheating temperature
30 to 60 seconds
Preheating part
150 ℃ to 180 ℃
60 to 120 seconds
Temperature-rising
Preheating temperature to 200 ℃
2 to 6 ℃ per second
part II
Main heating
Refer to the heat resistance range of the product
part
in the reflow soldering process.
Cooling part
200 ℃ to 100 ℃
1 to 4 ℃ per second
* Do not perform reflow soldering more than two times.
■ Mounting the surge absorber (SMD-type)
When mounting the surge absorber on the board, make sure that no excessive impact or load, such as pressure from a
suction nozzle for mounting the absorber, positional shift, or mechanical impact/stress caused by a positioning of the
absorber, is applied to the surge absorber. There are cases where the surge absorber shifts from its intended position
when mounted on the board. In such cases, consider a method of bonding the board and the outer sheath resin together.
■ Do not keep the product in a high-temperature or high-humidity condition. Keep the surge absorber in a room with
a temperature of 40 ℃ or lower and a relative humidity of 75% or lower and use the surge absorber within two years of
storage. Check the solderability of a surge absorber stored for a long period (two years or more) before using the surge
absorber.
■ Keep the surge absorber in a place where no corrosive gas atmosphere (hydrogen sulfide, sulfurous acid, chlorine,
ammonia, etc.) is present.
■ Keep the surge absorber in a place where the surge absorber is protected from direct sunlight, dew concentration, etc.
30-Jun-23
