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WDBR1ULxxxxI

更新时间： 2024-11-19 14:52:23
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4页 965K
描述
Ultra low profile power resistor, UL508, solder pads

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WDBR1ULxxxxI 数据手册

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Ultra Low Profile Power Resistors  
WDBR-UL Series  
Features:  
•
•
•
•
•
•
•
•
•
Ultra low profile thick-film on steel  
Up to 7kW peak power  
Single fixing heatsink mountable  
Ideal for dynamic braking, inrush limit and snubber circuits  
Choice of flying lead or solder terminaꢀons  
Low inductance design  
High isolaꢀon, even aꢂer failsafe overload fusing  
RoHS compliant, non-flammable construcꢀon  
UL508 cerꢀfied—UL file E238661  
All Pb-free parts comply with EU Direcꢀve 2011/65/EU amended by (EU) 2015/863 (RoHS3)  
Electrical Data  
WDBR1UL  
WDBR2UL  
WDBR3UL  
WDBR5UL  
WDBR7UL  
Resistance range 5  
Ω
12, 15, 20, 22, 25, 47, 50, 100, 150  
10  
Resistance tolerance  
Pulse peak power rating 1  
Power rating on heatsink 2  
Power rating on fan cooled heatsink 3  
TCR  
%
kW  
1.5  
170  
660  
2
3.5  
240  
5
7
W
190  
740  
250  
950  
260  
1410  
W
850  
ppm/°C  
<+600  
450  
Maximum element temperature  
Ambient temperature range (heatsink)  
Dielectric withstand 4  
Inductance  
°C  
°C  
V (dc/ac pk)  
µH  
-55 to +200  
2500  
<4  
<3  
<5  
<6  
Notes:  
1. For details of pulse condiꢀon see Fig. 1 in Performance Data.  
2. Mounted on a 0.53°C/W heatsink with no forced air cooling, air temperature 25°C.  
3. Mounted on a 0.53°C/W heatsink with 5m/s forced air cooling, air temperature 25°C.  
4. Based on 100% producꢀon test, duraꢀon 2s minimum.  
5. Other ohmic values upon request  
Physical Data  
Dimensions in mm and weight without terminations in g  
t = substrate thickness.  
L
W
t
ØD  
a
b
c
d
Wt.  
Type  
±0.1  
±0.1  
±0.1 nom  
nom  
nom  
nom  
min  
nom  
d = clearance between  
exposed conductor  
and exposed steel  
substrate.  
WDBR1UL 49.3  
WDBR2UL 61  
WDBR3UL 101.6  
WDBR5UL 122  
35.9  
3.2  
4.2  
5.5  
17.6  
19.7  
4.2  
5.5  
2.9  
4.5  
7.5  
7.5  
12.6  
17.1  
50.8  
40.6 0.9  
70  
14.5 24.8 10.1  
15.3 27 8.6  
5.3  
The fixing hole is  
centrally located.  
70  
101.2  
181.8  
1.5  
WDBR7UL 152.4 101.6  
39.3 10.7 11.8 10.5  
Construcꢀon  
Construcꢀon Cross Secꢀon  
A high integrity dielectric layer is applied to  
a machined stainless-steel substrate. Thick-  
film conductor and resistor paꢁerns are  
printed and fired, then protected with a high  
temperature overglaze. The terminaꢀon  
pads are ꢀnned with solder and opꢀonal  
leads are soldered on.  
General Note  
BI Technologies IRC Welwyn  
TT Electronics reserves the right to make changes in product specificaꢀon without noꢀce or liability.  
All informaꢀon is subject to TT Electronics’ own data and is considered accurate at ꢀme of going to print.  
www.ꢁelectronics.com/resistors  
05.23  
© TT Electronics plc  
1234

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