www.vishay.com

Document Number: 30160

42

Revision: 02-Jul-10

WSMS2908

Vishay Dale

Very Low Value (down to 0.0001

Ω)

FEATURES

• High power to resistor size ratio

• 5-terminal connection design

• Use for single or multi-phase energy meters

• Proprietary processing technique produces

extremely low resistance values

• All welded construction

• Very low inductance (< 5 nH)

• Low thermal EMF (< 3 μV/°C)

• Compliant to RoHS directive 2002/95/EC

Note

STANDARD ELECTRICAL SPECIFICATIONS

GLOBAL

MODEL

SIZE

POWER RATING

W

TOLERANCE

%

RESISTANCE VALUE

RANGE

Ω

RESISTANCE VALUES

Ω

WEIGHT

(typical)

g/1000 pieces

WSMS2908

2908

3.0

5.0

50μ to 1000μ

100μ, 250μ, 300μ, 430μ, 500μ

2100

TECHNICAL SPECIFICATIONS

PARAMETER

UNIT

RESISTOR CHARACTERISTICS

Temperature Coefficient

ppm/°C

± 500 for 100 μ

Ω, ± 225 for 250 μΩ,

± 175 for 300 μ

Ω, 430 μΩ, and 500 μΩ

Operating Temperature Range

°C

- 65 to + 170

Maximum Current Rating

A

GLOBAL PART NUMBER INFORMATION

GLOBAL PART NUMBERING: WSMS2908L2500JK (WSMS2908, 0.00025

Ω, ± 5 %)

GLOBAL MODEL

RESISTANCE VALUE

TOLERANCE CODE

PACKAGING CODE

SPECIAL

WSMS2908

L = m

Ω

L1000 = 0.00010

Ω

L2500 = 0.00025

Ω

L3000 = 0.00030

Ω

L4300 = 0.00043

Ω

L5000 = 0.00050

Ω

J = ± 5.0 %

K = Bulk pack

E = Tape and reel

(Dash number)

(Up to 2 digits)

From 1 to 99 as

applicable

W

S

M

S

2

9

0

8

L

2

5

0

0

J

K