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

Specificationsgivenhereinmaybechangedatanytimewithoutpriornotice.Pleaseconfirmtechnicalspecificationsbeforeyouorderand/oruse.

11/13/14

CSR

four-terminal current sense resistor

Resistance

Tolerance

Resistance

Range

E-12

Part

Designation

Rated

Ambient

Temperature

Operating

Temperature

Range

Power

Rating

T.C.R.

(ppm/°C)

Max.

applications and ratings

CSR1

CSR2

1W

2W

±50

5mΩ - 50mΩ

+70°C

-55°C to +125°C

D: ±0.5%,F: ±1%

F: ±1%

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

125

175

125

75

50

25

25

50

75

100

% Rated Power

CSR1

CSR1

0

0

150

100

typical circuit schematic

Input

Detecting

Circuit

Output

C

S

R

Voltage Terminal

(KELVIN terminal)

Current Terminal

PerformanceCharacteristics

Parameter

Requirement∆R±%

Limit

Typical

TestMethod

Resistance

T.C.R.

25°C

+25°C/+125°C

Within regulated

tolerance

Within specified

T.C.R.

—

—

Overload (Short Time)

Rated power x 5 for 5 seconds

±1.0%

±1.0%

Resistance to Solder Heat

260°C ± 5°C, 10 seconds ± 1 second

±1.0%

±1.0%

Rapid Change of Temperature

-55°C (30 minutes), +125°C (30 minutes), 500 cycles

±1.0%

±0.5%

Moisture Resistance

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

±2.0%

±0.5%

Endurance at 70°C

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

±1.0%

±0.5%

Low Temperature Exposure

-55°C, 1 hour

±0.5%

±0.25%

High Temperature Exposure

+125°C, 100 hours

±0.5%

±0.25%

2

1

S

1

CSR1

175

125

75

50

25

25

50

75 100

% Rated Power

CSR2

CSR2

0

0

150

100

CSR2

Regarding the temperature rise, the value of the temperature varies per

conditions and board for use since the temperature is measured under

our measuring conditions. Please refer to us before use.

20mΩ

10mm pattan

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.