Document Number: 31038

Revision 06-Sep-04

www.vishay.com

208

SPW

Vishay Dale

For Technical Questions, contact ff2aresistors@vishay.com

Carbon Film Resistors, Special Purpose

High Frequency Load (Tubes)

FEATURES

• High stability and excellent high frequency characteristics

• Particularly suited for high frequency applications involving

high power, high accuracy RF measurements

• Carbon film construction

APPLICATIONS

High frequency wattmeters for output measurement in radio,

TV and radar transmitters, dielectric heating and similar RF

generating equipment. Ideal for use as non-reactive radio

frequency terminations. Special high power designs with

internal water cooling are available. Contact factory.

STANDARD ELECTRICAL SPECIFICATIONS

MARKING

POWER RATING

WATTAGE FREE AIR

120

55

40

10

2

RESISTANCE

RANGE

50 ohm standard.

Other values

available

on special order.

Identification:

Type designation resistance value, tolerance

and code date of manufacture are printed on

each unit.

Terminations:

All types electroplated copper except

SPW-212. The SPW-212 has silver coated

termination bands.

Cooling:

Approximate increase in wattage when forced air cooling is

employed is 3 times wattages shown and for liquid cooling

(with heat exchanger) is 60 times wattages shown.

The

limiting factor insofar as the resistor is concerned is the film

temperature. This should not exceed +200°C and for maximum

stability should not exceed +150°C.

— DALE

— Model

— Value

— Tolerance

— Date code

RESISTANCE

TOLERANCE

± 2, ± 5

± 2, ± 5

± 2, ± 5

± 2, ± 5

± 2, ± 5

TEMPERATURE

COEFFICIENT

± 200 average

± 250 maximum

GLOBAL PART NUMBER INFORMATION

New Global Part Numbering: SPW21050R00JSL (preferred part numbering format)

S

P

W

2

1

050

R

0

0JS

L

Historical Part Number: SPW-210505% (will continue to be accepted)

SPW-210

50

5%

S51

HISTORICAL MODEL

RESISTANCE VALUE

TOLERANCE CODE

PACKAGING

GLOBAL MODEL

RESISTANCE VALUE

TOLERANCE CODE

PACKAGING

SPECIAL

(see Standard Electrical

Specification Table)

R = Decimal

25R00 = 25Ω

600R0 = 600Ω

G = ± 2%

J = ± 5%

K = ± 10%

SL = Custom Package

Blank = Standard

(Dash Number)

(up to 3 digits)

From 1-999 as

applicable

MECHANICAL SPECIFICATIONS

LINEARITY

TOLERANCE

± 10

± 10

± 10

± 10

± 10

ppm/

Ω

%

%

HISTORICAL

MODEL

SPW-236

SPW-227

SPW-210

SPW-214

SPW-212

GLOBAL

MODEL

SPW236

SPW227

SPW210

SPW214

SPW212

W