General Note

IRC reserves the right to make changes in product specification without notice or liability.

All information is subject to IRC’s own data and is considered accurate at time of going to print.

A subsidiary of

TT electronics plc

• 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

Legend mark or color code

depending on size

Solder coated

copper wire

Flameproof protection

Power Metal Film

Resistor

MF-S Series

Electrical Data

IRC

Type

Power

Rating

@ 70°C

(watts)

Resistance

Range

(ohms)

Limiting

Element

Voltage

(volts)

TCR

(ppm/°C)

Isolation

Voltage

(volts)

Resistance

Tolerance

(%)

Standard

Values

Thermal

Impedance

(°C/watt)

Operating

Temperature

Range

(°C)

MF1/2S

0.5

0.1 - 1M

350

150

500

≤1Ω: 5, 10

>1Ω: 1, 2, 5

E24

Preferred

140

-55 to 235

MF1S

1.0

110

MF2S

2.0

0.1 - 470K

<1

Ω: 350

≥10Ω: 150

80

MF3S

3.0

700

60

Characteristic

Maximum

Loaded at Rated Power: 1000 hrs at 70°C

5

Shelf Life: 12 months at room temperature

1

Derating from Rated Power at 70°C

zero at 155°C

Climatic

1

Climatic Category

40/125/56

Temperature Rapid Change

0..5

Resistance to Solder heat

0.5

Environmental Data

MF-S Series Issue October 2008 Sheet 1 of 3