MRS

plate-shaped high precision metal film resistor

Absolute

Maximum

Overload

Voltage

Absolute

Maximum

Working

Voltage

Type

Operating

Temperature

Range

Rated

Ambient

Temperature

Power

Rating

applications and ratings

T.C.R.

(ppm/°C)

Max.

Resistance Range (Ω)

––

––

––

––

––

––

100-100k

100-100k

100-100k

Y: ±5

T: ±10

E: ±25

Y: ±5

T: ±10

E: ±25

S: ±2.5

Y: ±5

T: ±10

0.125W

0.25W

0.3W

200V

250V

200V

400

500

MRS1/8

MRS1/4

MRS1/3

+70°C

-55°C

to

+125°C

Derating Curve

environmental applications

100

80

60

40

20

-60

-40

-20

0

406080100140

70

20

Ambient Temperature

(°C)

0

-55

120

125

Performance Characteristics

T: ±.01%

E96

––

––

––

––

––

––

30.1-100k

30.1-100k

30.1-100k

Q: ±.02%

E96

100-250k

100-250k

100-250k

100-510k

100-510k

100-510k

30.1-100k

10-100k

10-100k

A: ±.05%

100-250k

100-510k

100-510k

100-510k

100-1M

100-1M

30.1-100k

10-100k

10-100k

B: ±.1%

100-250k

30-510k

10-510k

100-510k

30-1M

10-1M

––

––

––

C: ±.25%

100-250k

30-510k

10-510k

100-510k

30-1M

10-1M

––

––

––

D: ±.5%

Surface Temperature Rise

100

75

50

25

25

50

75

100

% Rated Power

MRS1/8

0

0

MRS1/4

130

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.

11/29/11

Parameter

Requirement ∆ R ±(% + 0.05Ω)

Test Method

Resistance

T.C.R.

25°C

+25°C/+65°C

Within specified

tolerance

Within specified

T.C.R.

Overload (Short time)

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

±0.05%

Resistance to Soldering Heat

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

±0.1%: MRS1/8, 1/4

±0.05%: MRS1/3

Rapid Change of Temperature

MRS1/8, 1/4: -55 +0-5°C (30 minutes), +125 +3-0°C (30 minutes), 5 cycles

MRS1/3: -55 +0-5°C (30 minutes), +125 +3-0°C (30 minutes), 50 cycles

±0.1%: MRS1/8, 1/4

±0.05%: MRS1/3

Moisture Resistance

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

±0.1%: MRS1/8, 1/4

±0.05%: MRS1/3

Endurance at 70°C

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

±0.1%: MRS1/8, 1/4

±0.05%: MRS1/3

500V (a.c.) for 1 minute between terminals and coatings

Dielectric Withstanding Voltage

±0.5%: MRS1/8, 1/4

±0.05%: MRS1/3

500V (d.c.) for 1 minute

Insulation Resistance

10,000MΩ and more

Soaking in 2-propanol of +20°C~25°C for 180 seconds ± 10 seconds

Resistance to Solvent

No abnormality in appearance.

Marking shall be easily legible.

* MRS1/3 is available only in E96 series.

E24/E96 & 25, 50 *10

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