Lead Wire ......................................................................................Tin-plated copper wire
Coating Material ............................................................... Meets UL 94V-0 requirements
Environmental Characteristics
Test
Short Time Overload
Solderability
Resistance to
Solder Heat
Dielectric Strength
Insulation Resistance
Load Life Humidity
Conditions
2.5 times rated voltage
for 5 seconds.
245 ±3 °C for 2.5 ±0.5 seconds.
260 ±5 °C for 10 ± 1 seconds.
Test voltage >500 Vrms for
>1 minute.
Test voltage >500 Vrms for
1 minute.
40 ±2 °C, 90 to 95 %.
1.5 hours ON, 0.5 hours OFF for
1000 hours at rated power.
70 ±2 °C.
1.5 hours ON, 0.5 hours OFF for
1000 hours at rated power.
Specification
ΔR/R≤±(2
% ± 0.05
Ω)
Over 95 % coverage
ΔR/R≤±(1
% + 0.05
Ω)
Pass
>10
9
Ω
ΔR/R≤
±(5 % + 0.05
Ω)
Packaging Specifications
Qty. per
Box
(Pcs.)
Min.
Order
Quantity
(Pcs.)
Model
W1M
W2M
W3M
W5M
W7M
W9M
W10M
Style
Ammo
Pack
1,000
5,000
Ammo
Pack
Bulk in
Box
500
2,000
25 / 200
2,000
Load Life
ΔR/R≤±(5
% + 0.05
Ω)
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications 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 specific applications.
W Series Wirewound Power Resistor
Product Dimensions
W
L
D
W
Typical Part Marking
Resistors shall be marked with color
coding. Colors shall be in accordance with
JIS C 0802.
T (DIA.)
DIMENSIONS:
MM
(INCHES)
1st Significant
Figure
2nd Significant
Figure
Multiplier
Tolerance
Dimensions
Model
L*
W1M
9.5 ± 1.0
(.374 ± .004)
11.5 ± 1.0
(.453 ± .004)
15.5 ± 1.0
(.610 ± .004)
17.5 ± 1.0
(.689 ± .004)
24.5 ± 1.0
(.965 ± .004)
39.5 ± 1.0
(1.555 ± .004)
52.5 ± 1.0
(2.067 ± .004)
D
4.0 ± 1.0
(.157 ± .004)
4.5 ± 1.0
(.177 ± .004)
5.5 ± 1.0
(.217 ± .004)
6.5 ± 1.0
(.256 ± .004)
8.5 ± 1.0
(.335 ± .004)
8.5 ± 1.0
(.335 ± .004)
8.5 ± 1.0
(.335 ± .004)
W
28.0 ± 3.0
(1.102 ± .118)
28.0 ± 3.0
(1.102 ± .118)
28.0 ± 3.0
(1.102 ± .118)
28.0 ± 3.0
(1.102 ± .118)
38.0 ± 3.0
(1.496 ± .118)
38.0 ± 3.0
(1.496 ± .118)
38.0 ± 3.0
(1.496 ± .118)
T
0.60 ± 0.05
(.024 ± .002)
0.65 ± 0.05
(.026 ± .002)
0.70 ± 0.05
(.028 ± .002)
0.75 ± 0.05
(.030 ± .002)
0.75 ± 0.05
(.030 ± .002)
0.75 ± 0.05
(.030 ± .002)
0.75 ± 0.05
(.030 ± .002)
Color
Black
Brown
Red
Orange
Yellow
Green
Blue
Violet
Grey
White
Gold
Silver
1st
Band
0
1
2
3
4
5
6
7
8
9
2nd
Band
0
1
2
3
4
5
6
7
8
9
Multi-
plier
1
Ω
10
Ω
100
Ω
1K
Ω
10K
Ω
100K
Ω
1M
Ω
10M
Ω
Tol.
W2M
±1 %
±2 %
W3M
W5M
±0.5 %
±0.25 %
±0.10 %
±0.05 %
W7M
W9M
W10M
0.1
Ω
0.01
Ω
±5 %
±10 %
* Larger body size available upon request.
Power Derating Curve
120
Percent Rated Load (%)
100
80
60
40
20
0
-55
0
50 70 100
150
200
250 275 300
Ambient Temperature (°C)
Specifications 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 specific applications.
3312 - 2 mm SMD Trimming Potentiometer
W Series Wirewound Power Resistor
Packaging Specifications
O
T
6±1
C
P
B
Z = 1.0
DIMENSIONS:
MM
(INCHES)
t
S
L1
L2
A
Model
W1M
W2M
W3M
W5M
W7M
O
58 ± 1
(2.283 ± .039)
58 ± 1
(2.283 ± .039)
65 ± 5
(2.559 ± .197)
65 ± 5
(2.559 ± .197)
90 ± 5
(3.543 ± .197)
P
5 ± 0.3
(.197 ± .012)
10 ± 0.5
(.394 ± .020)
10 ± 0.5
(.394 ± .020)
10 ± 0.5
(.394 ± .020)
10 ± 0.5
(.394 ± .020)
A
75 ± 5
(2.953 ± .197)
80 ± 5
(3.150 ± .197)
90 ± 5
(3.543 ± .197)
90 ± 5
(3.543 ± .197)
115 ± 5
(4.528 ± .197)
B
70 ± 5
(2.756 ± .197)
82 ± 5
(3.228 ± .197)
119 ± 5
(4.685 ± .197)
88 ± 5
(3.465 ± .197)
124 ± 5
(4.882 ± .197)
C
255 ± 5
(10.039 ± .197)
255 ± 5
(10.039 ± .197)
255 ± 5
(10.039 ± .197)
255 ± 5
(10.039 ± .197)
500 ± 5
(19.685 ± .197)
Qty./Box
1,000 pcs.
1,000 pcs.
1,000 pcs.
500 pcs.
500 pcs.
For W9M and W10M packaging specifications, please contact factory.
Asia-Pacific:
Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
EMEA:
Tel: +36 88 520 390 • Fax: +36 88 520 211
The Americas:
Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
07/15
Specifications 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 specific applications.
