Aluminium Housed
Wirewound Resistors
WH Series
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High power dissipation up to 300W
All welded construction
Suitable for severe environments
Designed for excellent thermal conductivity to heatsink
Spade terminal option
RoHS compliant
Electrical Data
WH5
WH10
WH25
WH50
Notes
2
2
watts
10
15
25
50 1,
On standard heatsink
Power rating at 25°C
Resistance range
ohms 0R01 to 10K 0R01 to 20K 0R01 to 44K
0R015 to 120K
TCR (-55° to 200°C)
ppm/°C
<10R: ±75 ≥10R to <100R: ±50 ≥100R: ±25
1(F), 2(G), 5(J) and 10(K)
Resistance tolerance
Low value limits
%
ohms
volts
1R at 1% 0R5 at 2% 0R05 at 5% 0R01 at 10%
WH50 0R015 at 10%
DC or AC peak
Isolation voltage
1500
1500
3000
3000
Note 1: For load at full rating mount on aluminium heatsink 30.5 cm x 30.5 cm x 1.5 mm
Note 2: WH25T & WH50T are additionally rated at 15A
CECC 40203-006 Requirements *
AA
BA
CA
DA
40
Notes
watts
10
15
25
On standard heatsink
Power rating at 25°C
Resistance range
ohms 0R05 to 3K4 0R05 to 15K 0R05 to 33K
ppm/°C ≥5R to ≤10R: ± 100 >10R: ±50
1(F), 2(G), and 5(J)
1R at 1% 0R5 at 2% 0R05 at 5%
1000 2000
0R05 to 82K
TCR (-55° to 200°C)
Resistance tolerance
Low value limits
%
ohms
volts
Isolation voltage
1000
2000
DC or AC peak
* This table indicates the CECC specification requirements which are met or exceeded by the corresponding WH series products.
Limiting element voltage
Standard values
volts
150
250
E24 preferred range
10.0 6.0
-55 to 200
500
1250
3.5
DC or AC rms
Other values to order
On standard heatsink
Thermal impedance
°C/watt
°C
16.0
Ambient temperature range
WH100
WH200
200
WH300
300
Notes
watts
ohms
100
On standard heatsink
Power rating at 25°C
Resistance range
0R01 to 70K
0R01 to 50K
0R01 to 68K
TCR (-55° to 200°C)
Resistance tolerance
ppm/°C
%
≤1K0: ±100 >1K0: ±25
Standard 5(J) and 10(K). also available : 1(F) and 2(G)
Typically ≥0R05: ±5% ≤0R047: ±10%
7070
Low value limits
ohms
volts
volts
Isolation voltage
6360
7070
1900
DC or AC peak
DC or AC rms
Limiting element voltage
Standard values
1900
2500
E24 preferred range
0.7
Other values to order
On standard heatsink
Thermal impedance
Ambient temperature range
°C/watt
°C
1
0.6
-55 to 200
General Note
TT electronics reserves the right to make changes in product specification without notice or liability.
All information is subject to TT electronics’ own data and is considered accurate at time of going to print.
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07. 12
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