Ultra Low Profile
Power Resistors
WDBR Series
Terminations
The following termination options are available
Option
Code
Nominal Dimensions
9mm
Solder pad only
1
I
9mm
Flying leads
UL3134/5
40A, 600V
250mm
L
3mm
6mm
0.8mm
Push-on connectors
(WDBR1,2,3,5&7)
T
11mm
8mm
8.5mm
Notes:
1. Two options exist for solder type. The standard is SnAg (96SC) and the second is high temperature HMP alloy.
Thermal Performance
Maximum
Pulsed load at full pulse power rating 50,000 cycles (see Fig 1)
Mounted on a 0.53°C/W heatsink with 5m/s forced air cooling, air temperature 25°C.
Derating at heatsink temperatures >160°C
ΔR%
5
See Fig. 2
Fig. 1: Duty Cycle Waveform
% of Rated Power
1ms
P pk
120
100
80
60
40
20
0
Fig. 2: Temperature Derating
1ms
2s
8s
0
50
100
150
200
250
Heatsink Temperature (°C)
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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© TT electronics plc
02.13
WELWYN [ WELWYN COMPONENTS LIMITED ]
