Ultra Low Profile

Power Resistors

WDBR Series

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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.

© TT electronics plc

2.14

250mm

3mm

Terminations

The following termination options are available

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.

ΔR%

5

Derating at heatsink temperatures >160°C

See Fig. 2

Thermal Performance

1ms

1ms

8s

Ppk

2s

Fig. 1: Duty CycleWaveform

0

20

40

60

80

100

120

050100

150200

250

Heatsink Temperature(°C)

Fig.2: TemperatureDerating

PL

WDBR Size

½

1, 2, 3, 5 & 7

Pad Length, PL

7.5

9.0

Pad Width, PW

4.5

9.0

WDBR Size

½

1, 2, 3, 5 & 7

Terminal Height, TH

6.8

11

Terminal Width, TW

2.8

6.3

Terminal Thickness, TT

0.8

0.8

PW

Notes:

1. Two options exist for solder type. The standard is SnAg (96SC) which is Pb-free and the second (HT) is high temperature HMP alloy which is

Pb-bearing. Both are RoHS compliant, but the second relies on the RoHS exemption for high temperature solders and is targeted at specialist

high temperature applications.

TH

TW

TT

Option

Code

Nominal Dimensions (mm)

I

Flying leads

UL3134/5

40A, 600V

L

Push-on connectors

T