• 4222 South Staples Street • Corpus Christi Texas 78411 USA

Wire and Film Technologies Division

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

Sample Part No.

IRC Type

Power

Resistance Range

Tolerance

Lead Free Construction

Ordering Data

SP - 20 150

Ω

5%

LF

SP-20 Power Derating Curve

2.0

2.5

1.5

1.0

0.5

0

Ambient Temperature (°C)

0

50

100

150

200

General Purpose Failsafe

Molded Wirewound Resistor

SP-20F Power Derating Curve

SP-20F Typical Fusing

SP-20 and SP20F

Temperature Rise Chart

2.0

2.5

1.5

1.0

0.5

0

Ambient Temperature (°C)

0

50

100

150

200

20

25

15

10

6

0

Time (seconds)

0

20

40

60

80

100

8

4

2

0.1 ohm

1 ohm

10 ohm

100 ohm

1000 ohm

100

120

80

60

40

20

Power Input (watts)

0

0.5

1.0

1.5

2.0

0

SP20/SP20F Series Issue December 2008 Sheet 3 of 3