Performance Data

Test

SP20

SP20F

Temperature coefficient (ppm)

ppm/°C

<1R ±800

<1R ±800*

≥1R ±150

≥1R ±150

Dielectric withstanding voltage

RMS

700V

Momentary overload

%

5

Low temperature operation

%

5

Temperature cycle

%

5

Humidity

%

5

Load life

%

5

Terminal strength

%

5

Resistance to solder heat

%

5

General-Purpose Failsafe

Moulded Wirewound Resistors

SP20/SP20F Series

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

96

Issue B · 03.02

Welwyn Components

Ambient Temperature (

°C)

2.5

2.0

1.5

1.0

0.5

0

0

50

100

150

200

Ambient Temperature (

°C)

SP20 Power Derating

SP20F Power Derating

Time (seconds)

0.1 ohm

1 ohm

10 ohm

100 ohm

1000 ohm

Power Input (watts)

SP20F Typical Fusing

SP20 and SP20F Temperature Rise

Packaging

Resistors are supplied tape and reel. 4,000 pcs per reel.

*0.1 ohm SP20F <1000 ppm.