WFP

www.vishay.com

Vishay Dale

Revision: 26-Jan-2021

3

Document Number: 30394

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

DERATING

Notes

• Embossed carrier tape per EIA-481

PERFORMANCE

TEST

CONDITIONS OF TEST

TEST LIMITS

TYPICAL PERFORMANCE

ALLOY A

CuMn

ALLOY B

NiCr

Thermal shock

-55 °C to +150 °C, 1000 cycles, 15 min at each extreme

± 0.5 %

± 0.65 %

± 0.1 %

Short time overload

2 x rated power, 5 s

± 0.5 %

± 0.05 %

± 0.05 %

Low temperature storage

-55 °C for 45 min

± 0.1 %

± 0.1 %

± 0.1 %

High temperature exposure

1000 h at +170 °C

± 1.0 %

± 0.6 %

± 0.1 %

Bias humidity

+85 °C, 85 % RH, 10 % power, 1000 h

± 0.5 %

± 0.2 %

± 0.1 %

Mechanical shock

100 g’s for 6 ms, 5 pulses

± 0.2 %

± 0.05 %

± 0.05 %

Vibration

Frequency varied, 10 Hz to 2000 Hz in 1 min,

3 directions, 12 h

± 0.2 %

± 0.05 %

± 0.05 %

Load life

1000 h at 125 °C, 1.5 h “ON”, 0.5 h “OFF”

± 1.0 %

± 0.8 %

± 0.1 %

Resistance to solder heat

MIL-STD-202, method 210, test condition K

± 0.3 %

± 0.2 %

± 0.05 %

Moisture resistance

MIL-STD-202, method 106, 0 % power, 7b not required

± 0.3 %

± 0.05 %

± 0.05 %

MODEL

REEL

TAPE WIDTH

DIAMETER

PIECES/REEL

CODE

WFPA3939

WFPB3939

16 mm / embossed plastic

330 mm / 13"

3000

EA

10

100

1000

10000

0

20

40

60

80

100

120

0

20406080 100 120 140 160 180

Axis Title

Terminal Temperature (°C)