100

KOA Speer Electronics, Inc. • 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com

Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use.

1/09/09

MF, MFS, RK

general purpose metal film leaded resistor

Performance Characteristics

environmental applications

PMS 300 neg.

Black neg.

Absolute

Maximum

Overload

Voltage

Absolute

Maximum

Working

Voltage

Part

Designation

Power

Rating

@ 70°C

applications and ratings

Minimum

Dielectric

Withstanding

Voltage

MF1/4C

MF1/4D

MF1/4E

MF1/2D

MF1/2C

MF1/2E

MF1D

MF1C

MF1E

0.25W

0.50W

1W

24.3

Ω-750K 24.3-1.0M 10-2.21M

30.1 - 1.0M

10 - 5.05M

47.5 - 2.0M

10

Ω-5.11M

47.5 - 4.64M

47.5 - 5.11M

1.0 - 6.81M

47.5 - 2.0M

10 - 4.99M

10 - 5.11M

30.1 - 1.0M

10 - 2.21M

30.1 - 750K

30.1 - 1.0M

47.5- 1.0M

47.5 - 1.5M

47.5

Ω-1.0M 47.5-2.49M

47.5 - 2.0M

7.5 - 2.49M

——

——

E: ±25

D: ±100

C: ±50

E: ±25

C: ±50

D: ±100

E: ±25

C: ±50

D: ±100

700V

500V

250V

350V

500V

700V

T.C.R.

(ppm/°C)

Resistance Range (

Ω)

(B±0.1%)

E-96

(C±0.25%)

E-96

(D±0.5%)

E-24 E-96

(F±1.0%)

E-24 E-96

Operating

Temperature

Range

-55°C

to

+155°C

—

—

—

—

(G±2.0%)

E-24

—

—

—

—

(J±5.0%)

E-24

MF1/4L

1.0 - 10

L: ±200

0.51 - 10

30.1 - 750K

30.1 - 1.0M

——

—

47.5- 1.0M

47.5 - 1.5M

MF1/2L

—

1.0 - 10

L: ±200

0.51 - 10

Ω 0.33-5.6M

——

350V

700V

700V

MFS1/2D

MFS1/2C

10 - 1M

10 - 2.21M

——

C: ±50

D: ±100

500V

0.50W

350V

700V

10 - 2.2M

—

0.20 - 2.2M

MFS1/2L

2.2 - 2.2M

L: ±200

1.0 - 3.01M

RK1/2D

0.50W

—

—

5.11M - 33M

—

——

——

——

L: ±200

L: ±200

D: ±100

—

3.3M - 33M

—

3.3M - 33M

RK1/4D

—

3.09M - 25M

D: ±100

—

—

——

700V

1000V

500V

700V

0.25W

500V

—

—

500V

700V

6.2M - 33M

6.2M - 33M

RK1/4L

—

100k - 25M

——

B: ±350

100k - 33M

100k - 33M

RK1/4B

RK1/2L

RK1BC

1W

—

100k - 51M

——

——

G: ±250

B: ±350

100k - 100M 100k - 100M

1000V

1500V

1000V

0.50W

350V

700V

700V

—

—

—

1M - 12M

—

100k - 35M

——

B: ±350

100k - 51M

100k - 51M

RK1/2B

RK1/2G*

* Discharge path resistor

Parameter

Requirement

∆ R ±(% + 0.05Ω)

Limit

Typical

Test Method

Resistance

T.C.R.

25°C

Room temperature, +100°C

Within specified

tolerance

Within specified

T.C.R.

—

—

Overload (Short Time)

Rated voltage x 2.5 or max. overload voltage for 5 seconds, whichever is less;

MFS1/2: Rated voltage x 2 or max. overload voltage for 5 seconds, whichever is less

RK: ±1%, RK1/2G: ±2.5%

MF: ±0.5%

RK: ±0.6%, RK1/2G: ±2.5%

MF: ±0.3%

Resistance to Solder Heat

260°C ± 5°C, 10 seconds ± 1 second or

350°C ± 10°C, 3.5 seconds ± 0.5 second

RK: ±1%; RK1/2G: ±5%;

MFS: ±0.75%; MF1/4,

MFS1/2, MF1/2: ±0.5%,

RK: ±0.5%; RK1/2G: ±1%

MFS1/4: ±0.4%; MF1/4,

MFS1/2, MF1/2: ±0.25%

Dielectric Withstanding Voltage

1 minute

No breakdown

—

Insulation Resistance

100V, 1 minute

Not less than 10,000M

Ω

—

Rapid Change of Temperature

-55°C (30 minutes), +155°C (30 minutes), 5 cycles

RK,MF: ±1%; RK1/2G: ±5%

MF: ±0.3%; RK: ±0.5%,

RK1/2G: ±1%

Moisture Resistance

40°C ± 2°C, 90 - 95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle

RK: ±5%; RK1/2G: ±10%;

MFS1/4: ±1.5%; MF1/4,

MFS1/2, MF1/2: ±1%

RK: ±2%; RK1/2G: ±5%;

MFS1/4: ±1%; MF1/4,

MFS1/2, MF1/2: ±0.75%

Endurance at 70°C

70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle

RK: ±5%; RK1/2G: ±10%;

MFS1/4: ±1.5%; MF1/4,

MFS1/2, MF1/2: ±1%

RK: ±2%; RK1/2G: ±5%;

MFS1/4: ±1%; MF1/4,

MFS1/2, MF1/2: ±0.75%

Resistance to Solvent

The resistor shall be immersed for 5 seconds in IPA

No abnormality in

appearance. Marking

shall be easily legible

—

Impulse

Discharge from 1000pF capacitor 50 pulses. Internal 2.5 seconds.

Charge voltage: 1.25kV (RK1/4), 2.5kV (RK1/2) and 6kV (RK1)

No such abnormalities

as short-circuit, burnout,

breakdown, etc.

—

1733 Reader's Spreads pg1-203:document

1/27/09

4:08 PM

Page 98