SIOV metal oxide varistors
Housed (ThermoFuse) varistors, AdvanceD series
Series/Type:
T20 series
Date:
September 2015
© EPCOS AG 2015. Reproduction, publication and dissemination of this publication, enclosures hereto and the
information contained therein without EPCOS' prior express consent is prohibited.
EPCOS AG is a TDK Group Company.
Housed varistors
T20 series
ThermoFuse varistors
Construction
Round varistor element, leaded
Coating: epoxy resin, flame-retardant to UL 94 V-0
Terminals: tinned copper wire, metal compound wire
Housing: thermoplastic, flame-retardant to UL 94 V-0
Features
Wide operating voltage range 130 … 680 VRMS
Self-protected under abnormal overvoltage conditions
High-energy AdvanceD series E2
Approvals
UL 1449 (file number E321126)
IEC (certificate number 101-QA-10 IECQ)
VDE (certificate number 40031102)
Applications
Houshold appliances
Power supply units
Inverters in solar power systems
Lighting applications
Communication and data systems
Transient voltage surge suppressors (TVSS)
Electronic metering
Delivery mode
Typical applications
Tray packing
General technical data
Climatic category
Operating temperature
Storage temperature
Electric strength
Insulation resistance
Response time
Please read Cautions and warnings and
Important notes at the end of this document.
to IEC 60068-1
to IEC 61051
to IEC 61051
to IEC 61051
Page 2 of 17
40/85/56
40 ... + 85
40 ... + 85
≥ 2.5
≥ 100
< 25
°C
°C
kVRMS
MΩ
ns
Housed varistors
T20 series
ThermoFuse varistors
Electrical specifications and ordering codes
Maximum ratings (TA = 85 °C)
Ordering code
B72220T2131K105
B72220T2151K105
B72220T2171K105
B72220T2231K105
B72220T2251K105
B72220T2271K105
B72220T2301K105
B72220T2321K105
B72220T2351K105
B72220T2381K105
B72220T2421K105
B72220T2461K105
B72220T2511K105
B72220T2551K105
B72220T2621K105
B72220T2681K105
1)
Type
(untaped)
VRMS
VDC
SIOVT20K130E2
T20K150E2
T20K175E2
T20K230E2
T20K250E2
T20K275E2
T20K300E2
T20K320E2
T20K350E2
T20K385E2
T20K420E2
T20K460E2
T20K510E2
T20K550E2
T20K625E2
T20K680E2
V
130
150
175
230
250
275
300
320
350
385
420
460
510
550
625
680
V
170
200
225
300
320
350
385
420
460
505
560
615
670
745
825
895
imax
In1)
(8/20 µs) (8/20 µs)
15 times
A
A
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
10000
3000
Wmax Pmax
(2 ms)
J
100
120
135
180
195
215
250
273
223
248
273
300
325
360
400
440
W
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
Note: Nominal discharge current In according to UL 1449, 3rd edition.
Characteristics (TA = 25 °C)
Ordering code
B72220T2131K105
B72220T2151K105
B72220T2171K105
B72220T2231K105
B72220T2251K105
B72220T2271K105
B72220T2301K105
B72220T2321K105
B72220T2351K105
B72220T2381K105
B72220T2421K105
B72220T2461K105
B72220T2511K105
B72220T2551K105
B72220T2621K105
B72220T2681K105
Type
(untaped)
SIOVT20K130E2
T20K150E2
T20K175E2
T20K230E2
T20K250E2
T20K275E2
T20K300E2
T20K320E2
T20K350E2
T20K385E2
T20K420E2
T20K460E2
T20K510E2
T20K550E2
T20K625E2
T20K680E2
Please read Cautions and warnings and
Important notes at the end of this document.
Vv
(1 mA)
V
205
240
270
360
390
430
470
510
560
620
680
750
820
910
1000
1100
Page 3 of 17
∆Vv
(1 mA)
%
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
±10
vc,max
(ic)
V
340
395
455
595
650
710
775
840
910
1025
1120
1240
1355
1500
1650
1815
ic
A
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
Ctyp
(1 kHz)
pF
1850
1550
1350
940
940
850
780
720
660
600
550
500
460
410
380
340
Housed varistors
T20 series
ThermoFuse varistors
Dimensional drawings in mm
Lead configuration
T20, VRMS = 130 ... 420 V
T20, VRMS = 460 ... 680 V
Weight
Nominal diameter
mm
20
VRMS
V
130 ... 680
Please read Cautions and warnings and
Important notes at the end of this document.
Weight
g
6.2 ... 14
Page 4 of 17
Housed varistors
T20 series
ThermoFuse varistors
Reliability data
Test
Test methods/conditions
Requirement
Varistor voltage
The voltage between two terminals with To meet the specified value
the specified measuring current applied
is called VV (1 mADC @ 0.2 ... 2 s).
Clamping voltage
The maximum voltage between two
terminals with the specified standard
impulse current (8/20 µs) applied.
To meet the specified value
Endurance at upper
category temperature
1000 h at UCT
|∆V/V (1 mA)| ≤10%
Surge current derating,
8/20 µs
10 surge currents (8/20 µs), unipolar,
interval 30 s, amplitude corresponding
to derating curve for 10 impulses at
20 µs
Surge current derating,
2 ms
10 surge currents (2 ms), unipolar,
|∆V/V (1 mA)| ≤10%
interval 120 s, amplitude corresponding (measured in direction of
to derating curve for 10 impulses at
surge current)
2 ms
No visible damage
Electric strength
IEC 61051-1, test 4.9.2
After having continuously applied the
maximum allowable AC voltage at UCT
±2 °C for 1000 h, the specimen shall be
stored at room temperature and normal
humidity for 1 to 2 h.
Thereafter, the change of VV shall be
measured.
Metal balls method, 2500 VRMS, 60 s
The varistor is placed in a container
holding 1.6 ±0.2 mm diameter metal
balls such that only the terminations of
the varistor are protruding.
The specified voltage shall be applied
between both terminals of the specimen
connected together and the electrode
inserted between the metal balls.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 5 of 17
|∆V/V (1 mA)| ≤10%
(measured in direction of
surge current)
No visible damage
No breakdown
Housed varistors
T20 series
ThermoFuse varistors
Test
Test methods/conditions
Requirement
Climatic sequence
The specimen shall be subjected to:
a) dry heat at UCT, 16 h, IEC
60068-2-2, test Ba
b) damp heat, 1st cycle:
55 °C, 93% r. H., 24 h, IEC
60068-2-30, test Db
c) cold, LCT, 2 h, IEC 60068-2-1, test
Aa
d) damp heat, additional 5 cycles:
55 °C/25 °C, 93% r. H., 24 h/cycle,
IEC 60068-2-30, test Db.
|∆V/V (1 mA)| ≤10%
Rins ≥100 MΩ
Then the specimen shall be stored at
room temperature and normal humidity
for 1 to 2 h.
Thereafter, the change of VV shall be
measured. Thereafter, insulation resistance Rins shall be measured at V = 500
V.
Rapid change of
temperature
IEC 60068-2-14, test Na, LCT/UCT,
dwell time 30 min, 5 cycles
|∆V/V (1 mA)| ≤5%
No visible damage
Damp heat, steady state
IEC 60068-2-78, test Ca
|∆V/V (1 mA)| ≤10%
The specimen shall be subjected to
Rins ≥100 MΩ
40 ±2 °C, 90 to 95% r. H. for 56 days
without load / with 10% of the maximum continuous DC operating voltage
VDC. Then stored at room temperature
and normal humidity for 1 to 2 h.
Thereafter, the change of VV shall be
measured. Thereafter, insulation resistance Rins shall be measured at V = 500
V (insulated varistors only).
Please read Cautions and warnings and
Important notes at the end of this document.
Page 6 of 17
Housed varistors
T20 series
ThermoFuse varistors
Test
Test methods/conditions
Solderability
IEC 60068-2-20, test Ta,
Resistance to soldering
heat
IEC 60068-2-20, test Tb, method 1A,
260 °C, 10 s:
Requirement
The inspection must be
carried out under adequate
method 1 with modified conditions for
light with normal eyesight or
lead-free solder alloys: 245 °C, 3 s:
with the assistance of a
After dipping the terminals to a depth of
magnifier capable of giving
approximately 3 mm from the body in a
a magnification of 4 to
soldering bath of 245 °C for 3 s, the
10 times. The dipped
terminals shall be visually examined.
surface must be covered
with a smooth and bright
solder coating with no more
than small amounts of
scattered imperfections
such as pinholes or
un-wetted or de-wetted
areas. These imperfections
must not be concentrated in
one area.
|∆V/V (1 mA)| ≤5%
No visible damage
Each lead shall be dipped into a solder
bath having a temperature of 260 ±5 °C
to a point 2.0 to 2.5 mm from the body
of the specimen, be held there for
10 ±1 s and then be stored at room
temperature and normal humidity for
1 to 2 h.
The change of VV shall be measured
and the specimen shall be visually
examined.
Tensile strength
IEC 60068-2-21, test Ua1
|∆V/V (1 mA)| ≤5%
After gradually applying the force
specified below and keeping the unit
fixed for 10 s, the terminal shall be
visually examined for any damage.
No break of solder joint,
no wire break
Force for wire diameter:
0.6 mm = 10 N
0.8 mm = 10 N
1.0 mm = 20 N
Please read Cautions and warnings and
Important notes at the end of this document.
Page 7 of 17
Housed varistors
T20 series
ThermoFuse varistors
Test
Test methods/conditions
Requirement
Vibration
IEC 60068-2-6, test Fc, method B4
Frequency range: 10 … 55 Hz
Amplitude:
0.75 mm or 98 m/s2
Duration:
6 h (3 · 2 h)
Pulse:
sine wave
After repeatedly applying a single
harmonic vibration according to the
table above.
The change of VV shall be measured
and the specimen shall be visually
examined.
|∆V/V (1 mA)| ≤5%
IEC 60068-2-29, test Eb
Pulse duration:
6 ms
Max. acceleration: 400 m/s2
Number of bumps: 4000
Pulse:
half sine
IEC 60695-11-5 (needle flame test)
|∆V/V (1 mA)| ≤5%
Bump
Fire hazard
Severity: vertical 10 s
Please read Cautions and warnings and
Important notes at the end of this document.
Page 8 of 17
No visible damage
No visible damage
5 s max.
Housed varistors
T20 series
ThermoFuse varistors
Test
Test methods/conditions
Requirement
Abnormal overvoltage test The device is designed to meet the
limited current abnormal overvoltage
condition, outlined in section 39.4 of UL
1449, 3rd edition.
Detailed test voltage applied onto the
device for different types as in the
following table:
Type
Device
rating
V AC
Test
voltage
V AC
T20K130E2
130
260
T20K150E2
150
300
T20K175E2
175
350
T20K230E2
230
415
T20K250E2
250
500
T20K275E2
275
480
T20K300E2
300
600
T20K320E2
320
600
T20K350E2
350
600
T20K385E2
385
600
T20K420E2
420
600
T20K460E2
460
690
Type
Device
rating
V DC
Test
voltage
V DC1)
T20K510E2
670
780
T20K550E2
745
860
T20K625E2
825
950
T20K680E2
895
1040
None of the following
phenomena shall be
observed, or this specimen
will be judged as failed part:
1. Emission of flame, molten
metal, glowing or flaming
particles through any
openings (pre-existing or
created as a result of the
test) in the product.
2. Charring, glowing, or
flaming of the supporting
surface, tissue paper, or
cheesecloth.
3. Ignition of the enclosure.
4. Creation of any openings
in the enclosure that
result in accessibility of
live parts, when
evaluated in accordance
with accessibility of live
parts test in section 58.2
of UL1449, 3rd edition.
Note:
UCT = Upper category temperature
LCT = Lower category temperature
Rins = Insulation resistance
All electrical tests should be performed between pin 1 and pin 3.
1) For types T20K510E2 to T20K680E2 the testing for UL 3rd edition approval was conducted exclusively according to the test methods
specified for photovoltaic systems applications. The test voltage for T20K510E2 to T20K680E2 in above table is the maximum DC
long-duration test overvoltage for the device. Overstress above the listed test voltage may cause permanent damage to the device.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 9 of 17
Housed varistors
T20 series
ThermoFuse varistors
v/i characteristics
v = f (i) for explanation of the characteristics refer to "General technical information", chapter 1.6.3
A = Leakage current, B = Protection level } for worst-case varistor tolerances
SIOV-T20K130E2 ... T20K350E2
SIOV-T20K385E2 ... T20K680E2
Please read Cautions and warnings and
Important notes at the end of this document.
Page 10 of 17
Housed varistors
T20 series
ThermoFuse varistors
Derating curves
Maximum surge current imax = f (tr, pulse train)
For explanation of the derating curves refer to "General technical information", section 1.8.1
SIOV-T20K130E2 ... T20K320E2
SIOV-T20K350E2 ... T20K680E2
Please read Cautions and warnings and
Important notes at the end of this document.
Page 11 of 17
Housed varistors
T20 series
ThermoFuse varistors
1
Soldering instructions only for T series
1.1
Manual soldering
Maximum soldering temperature 350 °C for 3 s.It is recommended to heat sink the lead wires of
the ThermoFuse varistors (T series).
1.2
Wave soldering
Recommended temperature profile for wave soldering only for ThermoFuse varistors (T series).
Important note: Temperatures of all preheat stages and the solder bath must be strictly controlled.
Please read Cautions and warnings and
Important notes at the end of this document.
Page 12 of 17
Housed varistors
T20 series
ThermoFuse varistors
Cautions and warnings
General
1. EPCOS metal oxide varistors are designed for specific applications and should not be used
for purposes not identified in our specifications, application notes and data books unless otherwise agreed with EPCOS during the design-in-phase.
2. Ensure suitability of SIOVs through reliability testing during the design-in phase. SIOVs
should be evaluated taking into consideration worst-case conditions.
3. For applications of SIOVs in line-to-ground circuits based on various international and local
standards there are restrictions existing or additional safety measures required.
Storage
1. Store SIOVs only in original packaging. Do not open the package prior to processing.
2. Storage conditions in original packaging:
Storage temperature: 25 °C ... +45 °C,
Relative humidity:
