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KOA SPEER ELECTRONICS, INC.

Low Resistance Flat Chip Resistors

Type SR73

2. Type Designation

The type designation shall be in the following form:

SS-239 R9

AHA 2/23/16

CERTIFIED

1. Scope

This specification applies to chip resistors (SR73) produced by KOA Corporation.

SR73

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

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)

Dimensions

inches

(mm)

1R00

Tolerance

3. Dimensions and Structure

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

D: ±0.5%

F: ±1%

G: ±2%

J: ±5%

(Inch Size Code)

(0402)

Solder

Platin

(0603)

(0201)

Type

.024±.001 .012±.001 .004±.002 .006±.002 .009±.001

(0.6±0.03) (0.3±0.03) (0.1±0.05) (0.15±0.05) (0.23±0.03)

.039

+.004

-.002

(1.0

+0.1

)

-0.05

.063±.008

(1.6±0.2)

.02

+.004

-.002

(0.5

+0.1

)

-0.05

.031

+.006

-.004

(0.8

+0.15

)

-0.1

.01±.004

(0.25±0.1)

.01±.004 .014±.002

(0.25±0.1) (0.35±0.05)

.014±.004 .014±.004 .018±.004

(0.35±0.1) (0.35±0.1) (0.45±0.1)

.012

+.008

-.004

(0.3

+0.2

)

-0.1

Protective

Coating

Resistive

Inner

Film

Electrode

Platin

(0805)

(1206)

.079±.008 .049±.004 .016±.008

(2.0±0.2) (1.25±0.1) (0.4±0.2)

.063±.008

.126±.008

(1.6±0.2)

(3.2±0.2)

.102±.008

(2.6±0.2)

.197±.008 .098±.008

(5.0±0.2)

(2.5±0.2)

.02±.004

(0.5±0.1)

Ceramic

Substrate

(1210)

.016

+.008

-.004

(0.4

+0.2

)

-0.1

(2010)

(2512)

W3A

(2512)

W2H

(2010)

.02±.012 .026±.006 .024±.004

(0.5±0.3) (0.65±0.15) (0.6±0.1)

.016

+.008

-.004

(0.4

+0.2

)

-0.1

.026±.006

(0.65±0.15)

.248±.008 .122±.008

(6.3±0.2)

(3.1±0.2)

PAGE 1 OF 6

Bolivar Drive

P.O. Box 547

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.

KOA SPEER ELECTRONICS, INC.

4. Standard Applications

Part

Designation*

SR731H

(0201)

SR731E

(0402)

SR731J

(0603)

Power

Rating

@ 70°C

0.1W

1/6W (.166W)

1/5W (.2W)

1/3W (.33W)

SR732A

(0805)

1/2W (.5W

)

1/3W (.33W)

SR732B

(1206)

1/2W (.5W

)

1/2W (.5W)

SR732E

(1210)

2/3W (.66W )

SS-239 R9

Rated

T.C.R.

Ambient Terminal (ppm/°C)

Temp. Part Temp.

Max.

70°C

––

—

125°C

105°C

125°C

110°C

125°C

110°C

125°C

0 - ±400

0 - ±500

±200

±300

±500

±200

±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 E-24, E-96

(F±1%)

(D±0.5%)

—

0.15Ω - 10Ω

—

0.15Ω - 10Ω

—

0.15Ω - 10Ω

—

0.15Ω - 10Ω

—

1Ω - 10Ω**

—

0.51Ω - 10Ω**

0.2Ω - 0.47Ω**

0.1Ω - 0.18Ω**

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%)

—

0.51Ω - 10Ω

0.2Ω - 0.47Ω

0.1Ω - 0.18Ω

0.1Ω - 10Ω

—

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%)

0.27Ω - 10Ω

0.18Ω - 0.24Ω

0.51Ω - 10Ω

0.2Ω - 0.47Ω

0.1Ω - 0.18Ω

0.1Ω - 10Ω

—

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

Absolute Maximum

Maximum Overload

Working

Voltage

(5 Secs. Max.)

1.0V

1.11V

1.41V

2.5V

2.79V

3.53V

1.58V

3.95V

70°C

––

70°C

––

1.81V

4.54V

2.23V

5.59V

SR732H/W2H

(2010)

SR733A/W3A

(2512)

3/4W (.75W)

70°C

2.73V

3.16V

6.84V

7.90V

* 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.

Derating Curve

5. Rating

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.

PAGE 2 OF 6

Bolivar Drive

P.O. Box 547

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.

KOA SPEER ELECTRONICS, INC.

5-2 Voltage Rating

Resistors shall have a rated direct-current (DC)

continuous working voltage or approximate

sine-wave root-mean-square (RMS) continuous

working voltage at commercial-line frequency

and waveform corresponding to the power rating,

as determined from the following formula:

Where:

E = Rated voltage (V)

P x R P = Rated power (W)

R = Nominal resistance (Ω)

SS-239 R9

√

In no case shall be rated DC or R.M.S. continuous

working voltage be greater than the applicable

maximum value.

6. Body and Marking

Type

SR73

Tolerance

D (±0.5%)

F (±1%)

G (±2%)

J (±5%)

Coating

Color

Indigo

Marking

Color

White/ 4 digit

White/ 3 digit

Marking: a effective number and a multiplier. R means a decimal point.

7. Marking Method

D, F

4 digit

This character indicate

Ω

unit and

express 4 effective numbers.

R means a decimal point.

This character indicate

Ω

unit and

express 3 effective numbers.

R means a decimal point.

3 Digit

4 Digit

R20

0.2

R200

G, J

3 digit

4R7

4.7

4R70

PAGE 3 OF 6

Bolivar Drive

P.O. Box 547

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.

KOA SPEER ELECTRONICS, INC.

8. 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

SS-239 R9

Requirement

∆

R ±(%+0.05Ω)

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

9. Recommended Land Dimensions

9-1 Reflow Soldering

Type

Style

Soldering Pad

SR73

Chip Resistor

Resistor Size

0.016 x 0.008

(0.4 x 0.2)

0.024 x 0.012

(0.6 x 0.3)

0.039 x 0.020

(1.0 x 0.5)

0.063 x 0.031

(1.6 x 0.8)

0.079 x 0.049

(2.0 x 1.25)

0.126 x 0.063

(3.2 x 1.6)

0.126 x 0.098

(3.2 x 2.5)

0.197 x 0.098

(5.0 x 2.5)

0.252 x 0.126

(6.4 x 3.2)

0.005

(0.12)

0.010

(0.25)

0.020

(0.5)

0.039

(1.0)

0.051

(1.3)

0.087

(2.2)

0.087

(2.2)

0.138

(3.5)

0.181

(4.6)

Dimensions in inches (mm)

0.019

(0.48)

0.028

(0.7)

0.051

(1.3)

0.079

(2.0)

0.098

(2.5)

0.157

(4.0)

0.157

(4.0)

0.248

(6.3)

0.315

(8.0)

0.007

(0.18)

0.012

(0.3)

0.012

(0.3)

0.024

(0.6)

0.041

(1.05)

0.055

(1.4)

0.091

(2.3)

0.091

(2.3)

0.118

(3.0)

0.007

(0.18)

0.009

(0.225)

0.016

(0.4)

0.020

(0.5)

0.024

(0.6)

0.035

(0.9 )

0.035

(0.9 )

0.055

(1.4 )

0.067

(1.7)

PAGE 4 OF 6

Bolivar Drive

P.O. Box 547

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.

KOA SPEER ELECTRONICS, INC.

10. Taping

SS-239 R9

End tape

(Empty)

10-1 Taped Configuration

Dimensions in inches (mm)

Leader tape

(Top tape)

(Empty)

7.87 (200) min.

3.94 (100) min.

15.75 (400) min.

10-2 Dimensions of

Punched Paper Tape

+0.1

1.5

-0

Carrier Tape

75–0.

(TP)

2.04.0

–0.1

Direction of feed

Component Size (mm)

(Notes) Dotted lines are applicable to only "TP" and "TB."

Carrier

Tape

TBL

TC/TCM

TPL*

TDD

TED

TDD

TED

TDD

TED

Type

Quantity/

Reel

(Pieces)

40000

20000

35000

10000/15000

20000

10000

5000

10000

5000

4000

10000

5000

4000

10000

5000

4000

10000

4000

10000

4000

10000

0.25±0.04

0.25±0.03

0.67±0.05

1.15±0.1

1.9±0.1

2.4±0.2

2.4±0.1

2.4±0.2

3.5±0.2

3.5±0.1

3.5±0.2

3.5±0.1

3.6±0.15

5.35±0.2

5.4±0.2

6.65±0.2

6.9±0.2

0.45±0.04

0.45±0.03

0.37±0.05

0.65±0.1

1.1±0.1

1.1±0.08

1.1±0.1

1.65±0.2

1.6±0.2

1.65±0.1

1.45±0.15

2±0.2

1.9±0.2

1.9±0.1

1.9±0.2

2.85±0.2

2.8±0.1

2.9±0.15

2.9±0.2

3.44±0.2

3.6±0.2

Taping (mm)

1.0±0.05

2±0.05

1±0.05

2±0.05

4.0±0.1

2±0.05

4.0±0.1

0.40±0.1

0.31+0.2/-0

0.42±0.1

0.42+0.2/-0

0.6+0.2/-0

0.75+0.2/-0

0.9±0.1

0.75+0.2/-0

0.65±0.1

0.75+0.2/-0

1.0±0.1

0.75+0.2/-0

1.0±0.1

0.75+0.2/-0

1.0±0.15

0.75+0.2/-0

1.0±0.1

1.0±0.15

0.85±0.1

1.0±0.15

0.85±0.1

Reel

Size

180

178

255

178

255

178

255

178

255

178

255

178

255

0.4

0.6

0.2

0.3

0.5

0.12

0.23

0.35

1.6

0.8

0.45

SR73

1.25

0.5

3.2

1.6

0.6

3.2

2.6

0.6

2H/W2H

3A/W3A

6.3

2.5

3.1

0.6

4.0±0.2

8.0±0.2

12.0±0.1

PAGE 5 OF 6

Bolivar Drive

P.O. Box 547

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.