Wirewound Anti-Surge Resistors
Type EP Series
Key Features
Power up to
10W in Extra
Small Size
22 Size/Power
Options
Specially
Designed and
Tested for
Surge
Immunity
RoHS
Compliant
with no
exemptions
TE Connectivity is pleased to offer this wire wound axial leaded resistor. Robustly manufactured
with high quality materials this resistor offers flame proof coating, and is designed and tested to
withstand power surges of up to 12KV. In line with our commitment to increasing power to size
ratio we are now also able to offer this series in extra-small size.
Characteristics – Electrical
Type
Normal size
Small size
Extra Small
size
EP05W
EP1W
EP2W
EP3W
EP5W
EP7W
EP8W
EP9W
EP1WS
EP2WS
EP3WS
EP5WS
EP7WS
EP8WS
EP9WS
EP10WS
EP1WSSS
EP1WSS
EP2WSS
EP3WSS
EP4WSS
EP10WSS
Rated
Power at
70° C
1/2W
(0.50W)
1W
2W
3W
5W
7W
8W
9W
1W
2W
3W
5W
7W
8W
9W
10W
1W
1W
2W
3W
4W
10W
Max.
Working
Voltage
Max.
Overload
Voltage
Dielectric
Withstanding
Voltage
Resistance
Range
500 V
1,000 V
350 V
Ω–
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
1,000 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
350 V
500 V
500 V
500 V
500 V
500 V
500 V
500 V
350 V
350 V
350 V
500 V
500 V
500 V
Ω– KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω–
Ω
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – KΩ
Ω – 560Ω
Ω – 750Ω
Ω – 910Ω
Ω – 2.2KΩ
Ω – 2.2KΩ
Ω – 10KΩ
Operating
Temp.
Range
Ω
-55℃ –
+155℃
-55℃ –
+155℃
-55℃ –
+155℃
Derating Curve
For resistors operated in ambient temperatures above 70°C, power rating must be derated in accordance with
this curve.
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9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Surge Rating
Low
Resistance
Range
Type
Maximum
Surge
Voltage
EP05W
EP1W
EP2W
EP3W
EP5W
EP7W
EP8W
EP9W
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
3KV
4KV
5KV
7KV
8KV
9KV
10KV
10KV
EP1WS
EP2WS
EP3WS
EP5WS
EP7WS
EP8WS
EP9WS
EP10WS
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω
Ω
Ω
Ω
Ω
Ω
Ω
Ω
3KV
4KV
5KV
7KV
8KV
9KV
10KV
10KV
EP1WSSS
EP1WSS
EP2WSS
EP3WSS
EP4WSS
EP10WSS
Ω–
Ω–4
Ω–4
Ω–
Ω–
Ω–
Ω
Ω
Ω
Ω
Ω
Ω
1.5KV
1.8KV
2KV
3KV
4KV
9KV
Medium
Resistance
Range
Ω–
Ω
Ω – 240 Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Small Size
Ω–
Ω
Ω – 240 Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Ω–
Ω
Extra Small Size
Ω–
Ω
Ω–
Ω
Ω–
Ω
Ω – 24 Ω
Ω – 24 Ω
Ω–
Ω
Maximum
Surge
Voltage
High
Resistance
Range
Maximum
Surge
Voltage
4KV
5KV
6KV
8KV
9KV
10KV
11KV
11KV
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
4KV
5KV
6KV
8KV
9KV
10KV
11KV
12KV
4KV
5KV
6KV
8KV
9KV
10KV
11KV
11KV
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω–
Ω
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
kΩ
4KV
5KV
6KV
8KV
9KV
10KV
11KV
12KV
Ω–
Ω
Ω – 750Ω
Ω – 910Ω
270Ω – 2k2Ω
270Ω – 2k2Ω
Ω – 10kΩ
2.5KV
4KV
4KV
5KV
6KV
10KV
2KV
3KV
3KV
4KV
5KV
10KV
Surge Waveform (1.2 /50 µs)
1.2 / 50 µs Voltage Capability
10000
1000
100
10
100
1000
10000
Value Ω
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9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Construction
No.
1
2
3
4
5
6
7
Name
Material
Basic Body
Resistance Wire
End Cap
Lead Wire
Joint
Coating
Colour Code
Rod Type Ceramics
Resistance Wire Alloy
Steel (Tin plated iron surface)
Annealed copper wire coated with tin
By welding
Insulated & Non-Flame paint (colour: Light Green)
Non-Flame epoxy resin
Dimensions and Resistance Range
ød
H
Type
EP05W
EP1W
EP2W
EP3W
EP5W
EP7W
EP8W
EP9W
EP1WS
EP2WS
EP3WS
EP5WS
EP7WS
EP8WS
EP9WS
EP10WS
EP1WSSS
EP1WSS
EP2WSS
EP3WSS
EP4WSS
EP10WSS
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Power Rating at
70 ℃
1/2W (0.50W)
1W
2W
3W
5W
7W
8W
9W
1W-S
2W-S
3W-S
5W-S
7W-S
8W-S
9W-S
10W-S
1W-SSS
1W-SS
2W-SS
3W-SS
4W-SS
10W-SS
L
D±1
3.5
5.0
5.5
6.5
8.5
8.5
8.5
8.5
3.5
5.0
5.5
6.5
8.5
8.5
8.5
8.5
2.5
3.0
3.5
5.5
5.5
8.5
H
D
Dimensions (mm)
L±1
d ± 0.05
10.0
12.0
16.0
17.5
25.0
30.0
40.0
53.0
10.0
12.0
16.0
17.5
25.0
30.0
40.0
53.0
6.8
9.0
10.0
13.5
16.0
40.0
0.54
0.70
0.70
0.75
0.75
0.75
0.75
0.75
0.54
0.70
0.70
0.75
0.75
0.75
0.75
0.75
0.54
0.54
0.54
0.70
0.70
0.75
H±3
28
28
28
28
38
38
38
38
28
28
28
28
38
38
38
38
28
28
28
28
28
38
9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Performance Specification
Characteristics
DC. resistance
Must be within the specified
tolerance
Temperature
coefficient
<
≥
Short time
overload
Resistance change rate is
± % + . Ω Ma . with o
evidence of mechanical
damage
Ω:±
Ω:±
PPM/℃
PPM/℃
Terminal Strength
No evidence of mechanical
damage
Solderability
95% coverage Min.
Soldering temp.
reference
Electrical characteristics shall
be satisfied. Without distinct
deformation in appearance.
(95% coverage Min.)
Resistance to
soldering heat
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Limits
Resistance change rate is
± % + . Ω Ma . with o
evidence of mechanical
damage.
Test Methods
(JIS C 5201-1)
The limit of error of measuring apparatus shall not
exceed allowable range or 5% of resistance
tolerance.
(Sub-clause 4.5)
Natural resistance change per temp.
degree centigrade.
R2-R1
x10⁶ (PPM/℃)
R1(t2-t1) (
R1: Resistance value at room temperature (t1)
R2: Resistance value at room temp. plus 100 ℃ (t2)
(Sub-clause 4.8)
Permanent resistance change after application of a
potential of 2.5 times RCWV for 5 seconds.
(Sub-clause 4.13)
Direct load:
Resistance to a 2.5 kgs direct load for 10 secs. In
the direction of the axis of the terminal leads
Twist test:
Terminal leads shall be bent through 90°at a point
of about 6mm from the body of the resistor and
shall be rotated through 360°about the original
axis of the bent terminal in alternating direction
for a total of3 rotations
(Sub-clause 4.16)
The area covered with a new, smooth, clean, shiny
and continuous surface free from concentrated
pinholes.
Test temp. of solder 245℃ ± 3℃
Dwell time in solder : 2 ~ 3 seconds
(Sub-clause 4.17)
The leads immersed into solder bath to 3.2 to 4.8
mm. from the body. Permanent resistance change
shall be checked.
Wave soldering conditions: (2 cycles Max.)
Pre-heat : 100 ~ 120 ℃, 30 ± 5 sec.
Suggestion solder temp.: 235 ~ 255 ℃, 10 sec.
(Max.)
Peak temp.: 260 ℃
Hand soldering condition:
Hand soldering bit temp.: 380 ± 10 ℃
Dwell time in solder : 3 +1/-0 sec.
Permanent resistance change when leads
immersed to 3.2 to 4.8 mm from the body in 350℃
± 10 ℃ solder for 3 ± 0.5 seconds.
(Sub-clause 4.18)
9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Performance Specification (continued)
Characteristics
Temperature
cycling
Limits
Resistance change rate is
± % + . Ω Ma . with
no evidence of mechanical
damage
Vibration
Resistance change rate is
± % + . Ω Ma .
Load life in
humidity
Resistance change rate is
± % + . Ω Ma . with o
evidence of mechanical
damage
Load life
Resistance change rate is
± % + . Ω Ma . with o
evidence of mechanical
damage
Resistance to
solvent
No deterioration of
protective coatings and
markings
Surge
immunity test
(Resistor stand
alone-Not sync
to phase angle
and polarity)
Resistance change rate is
± % + . Ω Ma .
Test Methods
(JIS C 5201-1)
Resistance change after continuous 100 cycles for
duty shown below:
Step
Temperature
Time
1
-55℃ ± 3℃
30 mins
10~15 mins
2
Room temp.
3
+155℃ ± 2℃
30mins
10~15 mins
4
Room temp.
(Sub-clause 4.19)
55Hz, 3 planes 2hrs each
Total amplitude = 1.5mm
(Sub-clause 4.22)
Resistance change after
hrs . hrs o , . hr
off at RCWV i a hu idit test ha er o trolled
at 40℃ ± 2℃ and 90 to 95% relative humidity
(Sub-clause 4.24.2.1)
Permanent resistance change after 1000 hrs
operating at RCWV with duty cycle of (1.5 hours
"on", 0.5 hour "off") at 70℃ ± 2℃ ambient
(Sub-clause 4.25.1)
Specimens shall be immersed in a bath of Isopropyl
alcohol completely for 3 minutes with ultrasonic
(Sub-clause 4.30)
Refer to IEC61000-4-5
. μse risi g ti e a d
μse dis harge;
10 cycles every 1 minute
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Max Surge Voltage
Refer to surge
rating chart.
9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Painting Method
Welding point, terminal and lead wire, is permissible to be exposed without the
outer coated cover. The extent should be within ½ of the angle.
Marking
For EP Normal Size 1/2W, 1W, 2W, 3W and EP Small Size 1WS, 2WS, 3WS, 5WS and
EP Extra Small Size 1WSSS, 1WSS, 2WSS, 3WSS. Resistors shall be marked with
colour coding in accordance with JIS C 0802.
For EP Normal Size 5W, 7W, 8W 9W and EP Small Size 7WS, 8WS, 9WS, 10WS and EP
Extra Small Size 10WSS. Resistors will be marked with:
1 . Power Rating,
2. Nominal Resistance
3. Resistance Tolerance Code.
Label
Label shall be marked with the following items:
Example:
1.
2.
3.
4.
5.
6.
Type and style
Resistance Tolerance
Nominal Resistance
Quantity
PPM
Lot Number
7.
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9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Packaging
Tape dimensions (mm)
Style
O±1
P
L1-L2
Max.
T±1
Z Max.
R
T±1
S Max.
EP05W
PT-52
52
5± 0.3
1
6
1
0
4
0.5
EP1W
PT-52
52
5± 0.3
1
6
1
0
4
0.5
EP2W
PT-64
64
10± 0.5
1
6
1
0
5
0.5
EP3W
PT-64
64
10± 0.5
1
6
1
0
6
0.5
Small Size
EP1WS
PT-52
52
5± 0.3
1
6
1
0
4
0.5
EP2WS
PT-52
52
5± 0.3
1
6
1
0
4
0.5
EP3WS
PT-64
64
10± 0.5
1
6
1
0
5
0.5
EP5WS
PT-64
64
10± 0.5
1
6
1
0
6
0.5
EP1WSSS
PT-52
52
5± 0.3
1
6
1
0
4
0.5
EP1WSS
PT-52
52
5± 0.3
1
6
1
0
4
0.5
EP2WSS
PT-52
52
5± 0.5
1
6
1
0
4
0.5
EP3WSS
PT-64
PT-64
64
64
10± 0.5
10± 0.5
1
1
6
6
1
1
0
0
5
6
0.5
0.5
Extra Small Size
EP4WSS
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9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Tape In Box Packaging (mm)
Style
C±5
A±5
B±5
Quantity Per
Box (pcs.)
EP05W
PT-52
260
85
70
1000
EP1W
PT-52
262
86
80
1000
EP2W
PT-64
262
92
108
1000
EP3W
PT-64
256
92
80
500
70
1000
Small Size
EP1WS
PT-52
260
85
EP2WS
PT-52
262
86
80
1000
EP3WS
PT-64
262
92
108
1000
EP5WS
PT-64
256
92
80
500
Extra Small Size
EP1WSSS
PT-52
260
85
70
1000
EP1WSS
PT-52
260
85
70
1000
EP2WSS
PT-52
262
86
80
1000
EP3WSS
PT-64
PT-64
262
262
86
86
80
80
1000
1000
EP4WSS
te.com
9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Tape On Reel Packaging (mm)
Style
A (Across Flanges)
Quantity Per Reel
EP05W
PT-52
73 ± 2
2500
EP1W
PT-52
73 ± 2
2500
EP2W
PT-64
81 ± 5
1000
EP3W
PT-64
81 ± 5
500
Small Size
EP1WS
PT-52
73 ± 2
2500
EP2WS
PT-52
73 ± 2
2500
EP3WS
PT-64
81 ± 5
1000
EP5WS
PT-64
81 ± 5
500
EP1WSSS
PT-52
73 ± 2
2500
EP1WSS
PT-52
73 ± 2
2500
EP2WSS
PT-52
73 ± 2
2500
EP3WSS
PT-64
81 ± 5
1000
EP4WSS
PT-64
81 ± 5
1000
Extra Small Size
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9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Bulk In Box (in plastic bag) (mm)
C±5
A±5
B±5
EP05W
EP1W
EP2W
EP3W
155
155
155
155
53
53
53
53
EP1WS
EP2WS
EP3WS
EP5WS
155
155
155
155
53
53
53
53
100 / 1000
100 / 500
100 / 500
100 / 400
EP1WSSS
EP1WSS
EP2WSS
EP3WSS
EP4WSS
155
155
155
155
155
95
95
95
95
Small Size
95
95
95
95
Extra Small Size
95
95
95
95
95
Quantity Per
Bag/Box (pcs.)
100 / 1000
100 / 500
100 / 500
100 / 400
53
53
53
53
53
100 / 1000
100 / 1000
100 / 1000
100 / 1000
100 / 500
Bulk In Plastic Case Packaging (mm)
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C±5
A±5
B±5
EP5W
36
8
EP7WS
36
20
Small Size
20
Quantity Per
Case/Box (pcs.)
100 / 1000
8
100 / 1000
9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Bulk In Inner Box Packaging (in plastic bag) (mm)
Quantity / Bag
(pcs.)
Quantity Inner
Box (pcs.)
Quantity Carton
(pcs.)
Carton Box Size
L x W x H (± 5)
EP7W
10
250
1000
520 x 220 x 250
EP8W
10
250
1000
520 x 220 x 250
EP9W
10
250
1000
520 x 220 x 250
EP8WS
10
250
1000
520 x 220 x 250
EP9WS
10
250
1000
520 x 220 x 250
EP10WS
10
250
1000
520 x 220 x 250
EP10WSS
10
1000
215 x 520 x 250
Small Size
Extra Small Size
250
Environmental Related Substance
This product complies to EU RoHS directive, EU PAHs directive, EU PFOS
directive and halogen free.
Ozone layer depleting substances.
Ozone depleting substances are not used in our manufacturing process of this
product.
This product is not manufactured using Chloro fluorocarbons (CFGs),
Hydrochlorofluorocarbons (HCFCs), Hydrobromofluorocarbons (HBFCs) or
other ozone depleting substances in any phase of the manufacturing process.
te.com
9-1773463-6 Rev. D 06/2023
© 2023 TE Connectivity. All Rights Reserved.
TE Connectivity, TE connectivity (logo) and Every Connection Counts are trademarks owned or licensed by TE Connectivity. All
other logos, products and/or company names referred to herein might be trademarks of their respective owners.
Wirewound Anti-Surge Resistors
Storage Conditions (MSL1)
The performance of these products, including the solderability, is guaranteed
for a year from the date of arrival at your company, provided that they
remain packed as they were when delivered and stored at a temperature of
25℃ ± 10℃ and a relative humidity of 60%RH ± 10%RH, chemical and dust
free atmosphere.
Even within the above guarantee periods, do not store these products in the
following conditions.
Otherwise, their electrical performance and/or solderability may be
deteriorated, and the packaging materials (e.g. taping materials) may be
deformed or deteriorated, resulting in mounting failures.
1. In salty air or in air with a high concentration of corrosive gas, suck as
C , H “, NH , “O , or NO
2. In direct sunlight
How To Order
EP
3W
Common Part
Power Rating
EP
05W = 1/2W
1W = 1W
1WS = 1W-S
1WSS = 1W-SS
1WSSS = 1W-SSS
As per Electrical
Characteristics
chart
200R
Nominal
Resistance
J
Resistance
Tolerance
F = ±1
10 Ω – 10R
1K Ω – 1K0
(1000 Ω
G = ±2
J = ±5
Packaging
- Tape/Box
TR - Tape/Reel
BB - Bulk/Box
K = ±10
*Preferred range is E24 resistances at 5% Tolerance with Tape/Box packaging.
While TE has made every reasonable effort to ensure the accuracy of the information in this data sheet,
TE does not guarantee that it is error-free, nor does TE make any other representation, warranty or
guarantee that the information is accurate, correct, reliable or current. TE reserves the right to make any
adjustments to the information contained herein at any time without notice. TE expressly disclaims all
implied warranties regarding the information contained herein, including, but not limited to, any implied
warranties of merchantability or fitness for a particular purpose. The dimensions in this data sheet are
for reference purposes only and are subject to change without notice. Specifications are subject to
change without notice. Consult TE for the latest dimensions and design specifications.
te.com
9-1773463-6 Rev. D 06/2023
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