Document Number: 30120

For technical questions contact: ww2bresistors@vishay.com

www.vishay.com

Revision: 20-Apr-06

201

WSH2818

Low Value (down to 0.001

Ω), Surface Mount

Vishay Dale

DIMENSIONS

L

W

T

H

b

a

a

c

MODEL

DIMENSIONS in inches [millimeters]

RESISTANCE

RANGE

Ω

LW

H

T

WSH2818

0.006 - 0.1

0.280 ± 0.010

[7.1 ± 0.25]

0.180 ± 0.010

[4.6 ± 0.25]

0.032 ± 0.010

[0.813 ± 0.25]

0.125 ± 0.010

[3.18 ± 0.25]

0.001 - 0.0059

0.280 ± 0.010

[7.1 ± 0.25]

0.180 ± 0.010

[4.6 ± 0.25]

0.045 ± 0.010

[1.143 ± 0.25]

0.125 ± 0.010

[3.18 ± 0.25]

MODEL

SOLDER PAD DIMENSIONS in inches [millimeters]

ab

C

WSH2818

0.138

[3.5]

0.200

[5.1]

0.024

[0.61]

Embossed carrier tape per EIA-481-2

PERFORMANCE

TEST

CONDITIONS OF TEST

TEST LIMITS

Thermal Shock

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

± 0.5 %

ΔR

Short Time Overload

4 x rated power for 5 seconds

± 1.0 %

ΔR

Low Temperature Operation

- 65 °C for 45 minutes

± 0.5 %

ΔR

High Temperature Exposure

1000 hours at + 170 °C

± 1.0 %

ΔR

Bias Humidity

+ 85 °C, 85 % RH, 10 % Bias, 1000 hours

± 0.5 %

ΔR

Mechanical Shock

100 g’s for 6 milliseconds, 5 pulses

± 0.5 %

ΔR

Vibration

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

± 0.5 %

ΔR

Load Life

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

± 1.0 %

ΔR

Resistance to Solder Heat

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

± 0.5 %

ΔR

Moisture Resistance

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

± 0.5 %

ΔR

PACKING

MODEL

REEL

TAPE WIDTH

DIAMETER

PIECES/REEL

CODE

WSH2818

16 mm/Embossed Plastic

330 mm/13"

3500

EA

70

DERATING

120

100

80

60

40

20

0

- 65 - 50

- 25

0

25

50

75

100

125

150

170

AMBIENT TEMPERATURE IN °C