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KOASpeerElectronics,Inc. • 199BolivarDrive • Bradford,PA16701 • USA • 814-362-5536 • Fax:814-362-8883 • www.koaspeer.com

Specificationsgivenhereinmaybechangedatanytimewithoutpriornotice.Pleaseconfirmtechnicalspecificationsbeforeyouorderand/oruse.

3/09/15

fixed metal film melf resistors

Absolute

Maximum

Working

Voltage

RN412A

RN412D

RN412E

RN412H

RM412D

RM412H

Part

Designation

Absolute

Maximum

Overload

Voltage

Operating

Temperature

Range

Power

Rating

@70°C

T.C.R.

(ppm/°C)

Max.

applications and ratings

1/8W (.125W)

1/5W (.2W)

1/4W (.25W)

1/2W (.5W)

1/5W (.2W)

1/2W (.5W)

±100

±50

±200

±350

E-24

(J±5%)

E-24,E-96

(F±1%)

200V

300V

150V

—

—

—

—

—

—

0.22Ω-100kΩ

100Ω-100kΩ

10Ω-604kΩ

10Ω-1.0MΩ

0.22Ω-8.2Ω

(E-12)

200V

500V

600V

-55°C

to

+155°C

DeratingCurve

SurfaceTemperatureRise

environmental applications

100

80

60

40

20

-60

-40

-20

0

40

60

80

100

140

70

20

Ambient Temperature

(°C)

0

-55

120

155

160

100

80

60

40

20

-60

-40

-20

0

40

60

80

100

140

90

20

Terminal Part Temperature

(°C)

0

-55

120

155

160

2ES (.4W)

80

60

40

20

25

50

75

100

% Rated Power

0

0

2E

2H

2D

2A

E-24,E-96

(C±0.25%)

—

—

—

—

—

E-24,E-96

(D±0.5%)

—

—

—

—

—

—

±50

±25

100Ω-100kΩ

100Ω-1MΩ

RN412ES 1/4W(.25W)

—

1Ω-5.11MΩ

——

±50

±25

100Ω-100kΩ 100Ω-604kΩ

±350

——

—

0.22Ω-0.91Ω

250V

400V

—

250V

—

ResistanceRange

E-24,E-96

(B±0.1%)

—

—

—

—

—

—

—

43Ω-511kΩ

—

RN412ES 2/5W(.4W)** ±50

1Ω-100Ω

0.22Ω-0.91Ω

—

——

—

—

RN413AS 1W*

1Ω-1MΩ

—

—

±50

—

0.22Ω-0.91Ω

600V

400V

* A power rating shall be guaranteed with a method shown in the Performance Characteristics. Please contact factory prior to use.

** A power rating becomes a guarantee at terminal temperature

For resistors operated at an ambient temperature

of 70°C or above, a power rating shall be derated

in accordance with the above derating curve.

For resistors operated at a terminal part temperature of

described for each size or above, a power rating shall

be derated in accordance with the derating curve.

Please refer to “Introduction of the derating curve based

on the terminal part temperature” on the beginning of

our catalog before use.