Features
■ Low thermal resistant ceramic core
■ E24 resistance values
■ RoHS compliant*
■ Wide power range (1~10 W)
■ Coating material meets UL 94V-0
requirements
Applications
■ Smart meters
■ Renewable energy
■ Industrial
■ Power supplies/chargers
■ Lighting
■ Instruments/gauges
■ White goods
W Series Wirewound Power Resistor
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specifi c applications.
*RoHS COMPLIANT
Electrical Characteristics
Resistance Range ................................................ See Popular Resistance Values Table
Tolerance ....................................................................................................................5 %
Operating Temperature .........................................................................-55 °C to +200 °C
Temperature Coeffi cient ..............................................................................±300 ppm/°C
Maximum Voltage ....................................................................................................
√P*R
Non-inductive version is available upon request.
Physical Characteristics
Resistor .................................................................... Low thermal resistant ceramic core
Lead Wire ......................................................................................Tin-plated copper wire
Coating Material ............................................................... Meets UL 94V-0 requirements
Environmental Characteristics
Test Conditions Specifi cation
Short Time Overload
2.5 times rated voltage
ΔR/R≤±(2 % ± 0.05 Ω)
for 5 seconds.
Solderability 245 ±3 °C for 2.5 ±0.5 seconds. Over 95 % coverage
Resistance to
260 ±5 °C for 10 ± 1 seconds. ΔR/R≤±(1 % + 0.05 Ω)
Solder Heat
Dielectric Strength
Test voltage >500 Vrms for
Pass
>1 minute.
Insulation Resistance
Test voltage >500 Vrms for
>10
9
Ω
1 minute.
40 ±2 °C, 90 to 95 %.
Load Life Humidity 1.5 hours ON, 0.5 hours OFF for ΔR/R≤ ±(5 % + 0.05 Ω)
1000 hours at rated power.
70 ±2 °C.
Load Life 1.5 hours ON, 0.5 hours OFF for ΔR/R≤±(5 % + 0.05 Ω)
1000 hours at rated power.
Packaging Specifi cations
Model
Style
Qty. per
Box
(Pcs.)
Min.
Order
Quantity
(Pcs.)
W1M
Ammo
Pack
1,000 5,000
W2M
W3M
W5M
Ammo
Pack
500 2,000
W7M
W9M
Bulk in
Box
25 / 200 2,000
W10M
Popular Resistance Values
Code R Value
15R0 15 Ω
22R0 22 Ω
33R0 33 Ω
39R0 39 Ω
47R0 47 Ω
Code R Value
56R0 56 Ω
82R0 82 Ω
1000 100 Ω
1200 120 Ω
1500 150 Ω
Other E24 resistance values available upon request.
How to Order
W 3 M 22R0 J
Product Series
W = Wirewound
Power Rating
1 = 1 Watt
2 = 2 Watts
3 = 3 Watts
5 = 5 Watts
7 = 7 Watts
9 = 9 Watts
10 = 10 Watts
Pin Style
M = Axial Miniaturized Version
Resistance Code
• R<100 ohms:
“R” represents decimal point
(examples: 56R0 = 56 ohms)
• R≥100 ohms:
First three digits are signifi cant,
fourth digit represents number of
zeros to follow
(example: 1500 = 150 ohms)
Resistance Tolerance
J = ±5 %
