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SR73

lo-ohm 0.5%, 1%, 2%, 5% tolerance thick film

current sense resistor

features

•

Products with lead-free terminations

meet EU RoHS requirements. EU RoHS

regulation is not intended for Pb-glass contained

in electrode, resistor element and glass.

•

AEC-Q200 Qualified: 0402 (1E), 0603 (1J), 0805 (2A),

1206 (2B), 1210 (2E), 2010 (2H/W2H), 2512 (3A/W3A)

Type

(Inch Size Code)

resistors

.024±.001

(0.6±0.03)

.039

(1.0

+.004

-.002

+0.1

)

-0.05

Dimensions

inches

(mm)

.012±.001

(0.3±0.03)

.02

(0.5

+.004

-.002

+0.1

)

-0.05

+.006

-.004

+0.15

)

-0.1

.009±.001

(0.23±0.03)

.014±.002

(0.35±0.05)

.018±.004

(0.45±0.1)

.02±.004

(0.5±0.1)

1H (0201)

.004±.002

(0.1±0.05)

.01±.004

(0.25±0.1)

.014±.004

(0.35±0.1)

.016±.008

(0.4±0.2)

.006±.002

(0.15±0.05)

.01±.004

(0.25±0.1)

.014±.004

(0.35±0.1)

.012

(0.3

+.008

-.004

+0.2

)

-0.1

dimensions and construction

1E (0402)

1J (0603)

2A (0805)

.063±.008

(1.6±0.2)

.079±.008

(2.0±0.2)

.126±.008

(3.2±0.2)

.031

(0.8

Solder

Plating

Protective

Coating

Resistive Inner

Film

Electrode

Plating

.049±.004

(1.25±0.1)

.063±.008

(1.6±0.2)

.102±.008

(2.6±0.2)

.098±.008

(2.5±0.2)

2B (1206)

2E (1210)

2H (2010)

W2H (2010)

3A (2512)

W3A (2512)

.016

(0.4

.02±.012

(0.5±0.3)

+.008

-.004

+0.2

)

-0.1

.197±.008

(5.0±0.2)

.026±.006

(0.65±0.15)

.016

(0.4

+.008

-.004

+0.2

)

-0.1

.024±.004

(0.6±0.1)

Ceramic

Substrate

.248±.008

(6.3±0.2)

.122±.008

(3.1±0.2)

.026±.006

(0.65±0.15)

ordering information

SR73

Type

Size

W2H

W3A

Termination

Material

T: Sn

L: SnPb (1E,

1J, 2A, 2B, 2E,

2H, 3A)

G: Au (1J, 2A, 2B:

0.1Ω - 10Ω -

contact factory)

Packaging

TC: 0201 only: 7" 2mm pitch pressed

paper (TC: 10,000 pcs/reel,

TCM: 15,000 pcs/reel)

TPL:0402 only: 2mm pitch punch paper

TP: 0402, 0603, 0805: 7" 2mm pitch

punch paper

TD: 0603, 0805, 1206, 1210: 7" 4mm

pitch punched paper

TDD: 0603, 0805, 1206, 1210: 10" paper tape

TE: 0805, 1206, 1210, 2010 & 2512:

7" embossed plastic

TED: 0805, 1206, 1210, 2010 & 2512:

10" embossed plastic

For further information on packaging, please

refer to Appendix A

1R00

Nominal

Resistance

±2%, ±5%: 2 significant figures

+ 1 multiplier “R” indicates

decimal on value <10Ω

±1%: 3 significant figures

+ 1 multiplier “R” indicates

decimal on value <100Ω

All values less than 0.1Ω

(100mΩ) are expressed in

mΩ with “L” as decimal

Example: 20mΩ = 20L

(3-digit)

Tolerance

D: ±0.5%

F: ±1%

G: ±2%

J: ±5%

applications and ratings

Part

Designation*

SR731H

(0201)

SR731E

(0402)

SR731J

(0603)

Power

Rating

@ 70°C

0.1W

1/6W (.166W)

1/5W (.2W)

New

1/4W (.25W)

Rated

Ambient

Temp.

70°C

Rated

Terminal

Part Temp.

—

125°C

T.C.R.

(ppm/°C)

Max.

0 - ±400

0 - ±500

±200

±300

±500

±200

Resistance Range

E-24, E-96

(D±0.5%)

—

E-24, E-96

(F±1%)

1Ω - 10Ω**

—

0.51Ω - 10Ω**

0.2Ω - 0.47Ω**

0.1Ω - 0.18Ω**

1.02Ω - 10Ω

0.1Ω - 1Ω

E-24

(G±2%)

—

0.51Ω - 10Ω

0.2Ω - 0.47Ω

0.1Ω - 0.18Ω

1.1Ω - 10Ω

0.1Ω - 1Ω

E-24

(J±5%)

0.27Ω - 10Ω

0.18Ω - 0.24Ω

0.51Ω - 10Ω

0.2Ω - 0.47Ω

0.1Ω - 0.18Ω

1.1Ω - 10Ω

0.1Ω - 1Ω

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

11/08/17

KOA Speer Electronics, Inc.

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

SR73

lo-ohm 0.5%, 1%, 2%, 5% tolerance thick film

current sense resistor

applications and ratings

(continued)

Part

Designation*

Power

Rating

@ 70°C

1/3W (.33W)

SR732A

(0805)

1/2W (.5W )

Rated

Ambient

Temp.

70°C

––

Rated

Terminal

Part Temp.

125°C

105°C

125°C

110°C

125°C

110°C

125°C

T.C.R.

(ppm/°C)

Max.

±100

±200

±500

±800

±100

±200

±500

±800

±100

±200

±500

±800

±100

±200

±500

±800

±100

±200

±500

±1000

±100

±200

±500

±800

±100

±200

±500

±800

±100

±200

±500

±800

Resistance Range

E-24, E-96

(D±0.5%)

0.15Ω -

—

0.15Ω -

—

0.15Ω -

—

0.15Ω -

—

10Ω

E-24, E-96

(F±1%)

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

E-24

(G±2%)

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

0.1Ω - 10Ω

—

E-24

(J±5%)

—

0.1Ω - 10Ω

0.051Ω - 0.091Ω

0.030Ω - 0.047Ω

—

0.1Ω - 10Ω

0.051Ω - 0.091Ω

0.030Ω - 0.047Ω

—

0.1Ω - 10Ω

0.056Ω - 0.091Ω

0.030Ω - 0.051Ω

—

0.1Ω - 10Ω

0.056Ω - 0.091Ω

0.030Ω - 0.051Ω

—

0.047Ω - 10Ω

0.036Ω - 0.043Ω

0.024Ω - 0.033Ω

—

0.047Ω - 10Ω

0.036Ω - 0.043Ω

0.024Ω - 0.033Ω

—

0.1Ω - 10Ω

0.056Ω - 0.091Ω

0.033Ω - 0.051Ω

—

0.1Ω - 10Ω

0.056Ω - 0.091Ω

0.039Ω - 0.051Ω

10Ω

1/3W (.33W)

SR732B

(1206)

1/2W (.5W )

70°C

––

70°C

––

10Ω

1/2W (.5W)

SR732E

(1210)

2/3W (.66W

)

SR732H/W2H

(2010)

SR733A/W3A

(2512)

3/4W (.75W)

70°C

* Parentheses indicate EIA package size codes.

** 1H, 1E (F: ±1%) E-24 values only.

Operating Temp: -55C to +125°C (SR731H only), -55°C to +150°C

If any questions should arise whether to use the “Rated Ambient Temperature” or the “Rated Terminal Part Temperature,” please give priority to the “Rated Terminal

Part Temperature.” Prior to use and for more details refer to “Introduction of the derating curves on the terminal part temperature” in the beginning of the catalog.

Prior to use, refer to the “Higher Power Ratings” in the beginning of catalog. Rated voltage =

√Power

rating x resistance value or max. working voltage, whichever is lower

environmental applications

Derating Curve

1E, 1J

2A: 0.33W

2B: 0.33W

2E: 0.5W

W2H, W3A

SR73 2A (0.5W), SR73 2B (0.5W), SR73 2E (0.66W)

For resistors operated at an ambient temperature

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

in accordance with the 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.

Performance Characteristics

Parameter

Resistance

T.C.R.

Overload (Short time)

Resistance to Solder Heat

Rapid Change of Temperature

Moisture Resistance

Endurance at 70°C

High Temperature Exposure

Requirement

∆

R ±(%+0.005Ω)

Limit

Typical

Within specified

—

tolerance

Within specified

—

T.C.R.

±2%

±0.5%

1H: ±3%,

1H: ±0.75%

1E~W3A: ±1% 1E~W3A: ±0.3%

±1%

±0.3%

1H: ±3%

±1%

1E~W3A: ±2%

1H: ±3%

±1%

1E~W3A: ±2%

±1%

±0.3%

Test Method

25°C

+25°C/-55°C and +25°C/+125°C

Rated voltage x 2.5 for 5 seconds

260°C ± 5°C, 10 seconds ± 1 second

-40°C (30 minutes), +125°C (30 minutes), 100 cycles

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

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

1H: +125°C, 1000 hours; 1E, 1J, 2A, 2B, 2E, 2H/W2H, 3A/W3A:+150°C, 1000 hours

11/08/17

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

KOA Speer Electronics, Inc.

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

resistors