Document Number: 30110

For technical questions contact: ww2bresistors@vishay.com

www.vishay.com

Revision: 29-Mar-05

207

WSL3921 and WSL5931

Vishay Dale

DIMENSIONS

H

L

T

W

D

I

d

b

MODEL

DIMENSIONS in inches [millimeters]

LW

H

T

WSL3921

0.394 ± 0.010

[10.0 ± 0.254]

0.205 ± 0.010

[5.20 ± 0.254]

0.020

[0.5]

0.080 ± 0.010

[2.00 ± 0.254]

WSL5931

0.591 ± 0.010

[15.0 ± 0.254]

0.305 ± 0.010

[7.75 ± 0.254]

0.020

[0.5]

0.157 ± 0.010

[4.00 ± 0.254]

MODEL

SOLDER PAD DIMENSIONS in inches [millimeters]

db

l

WSL3921

0.106 ± 0.010

[2.70 ± 0.254]

0.244 ± 0.010

[6.20 ± 0.254]

0.220 ± 0.005

[5.60 ± 0.13]

WSL5931

0.205 ± 0.010

[5.20 ± 0.254]

0.344 ± 0.010

[8.75 ± 0.254]

0.220 ± 0.005

[5.60 ± 0.13]

Embossed carrier tape per EIA-481-1A.

70

Derating

120

100

80

60

40

20

0

-65 -50

-25

0

25

50

75

100

125

150

175

Ambient Temperature in

°C

GLOBAL

MODEL

RESISTANCE VALUE

m

Ω

“D”

THICKNESS

ELEMENT

MATERIAL

WSL3921

0.3

0.0510

Mn-Cu

WSL3921

0.5

0.0300

Mn-Cu

WSL3921

1.0

0.0150

Mn-Cu

WSL3921

2.0

0.0270

Fe-Cr

WSL3921

3.0

0.0170

Fe-Cr

WSL3921

4.0

0.0130

Fe-Cr

WSL5931

0.2

0.0485

Mn-Cu

WSL5931

0.3

0.0300

Mn-Cu

WSL5931

0.5

0.0180

Mn-Cu

WSL5931

1.0

0.0330

Fe-Cr

WSL5931

2.0

0.0155

Fe-Cr

WSL5931

3.0

0.0105

Fe-Cr

PERFORMANCE

TEST

CONDITIONS OF TEST

TEST LIMITS

Thermal Shock

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

± (1.0% + 0.0005

Ω) ∆R

Short Time Overload

5 x rated power for 5 seconds

± (0.5% + 0.0005

Ω) ∆R

Low Temperature Storage

- 65°C for 45 Min.

± (0.5% + 0.0005

Ω) ∆R

High Temperature Exposure

1000 hours at + 175°C

± (1.0% + 0.0005

Ω) ∆R

Bias Humidity

+ 85°C, 85% RH, 10% Bias, 1000 hours

± (0.5% + 0.0005

Ω) ∆R

Mechanical Shock

100g’s for 6 milliseconds, 5 pulses

± (0.5% + 0.0005

Ω) ∆R

Vibration

Frequency varied 10 to 2000Hz in one minute, 3 directions, 12 hours

± (0.5% + 0.0005

Ω) ∆R

Load Life

1000 hours at + 70°C, 1.5 hours “ON”, 0.5 hours “OFF”

± (1.0% + 0.0005

Ω) ∆R

Resistance to Solder Heat

+ 260°C Solder, 10 - 12 second dwell, 25mm/second emergence

± (0.5% + 0.0005

Ω) ∆R

Moisture Resistance

MIL-STD-202, Method 106, 0% power, 7a and 7b not required

± (0.5% + 0.0005

Ω) ∆R

PACKAGING

MODEL

REEL

TAPE WIDTH

DIAMETER

PIECES/REEL

CODE

WSL3921

16mm/Embossed Plastic

330mm/13"

3000

EA

WSL5931

16mm/Embossed Plastic

330mm/13"

2000

EA