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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. 5/20/09
SR73
lo-ohm 0.5%, 1%, 2%, 5% tolerance thick film
current sense resistor
* Parenthesis indicate EIA package size codes. ** See Appendix D for available decade values. *** 1H, 1E (F: ±1%) E-24 values only.
1Please contact factory for limitation of Surface Mount Temp. Rise
6SR73W3AS (2010 size, 1 Watt) with limited Resistance Range - contact factory for details
Absolute
Maximum
Working
Voltage
E-24, E-96
(F±1%)
E-24
(G±2%)
E-24
(J±5%)
Part
Designation*
Maximum
Overload
Voltage
(5 Secs. Max.)
Operating
Temperature
Range
Power
Rating
@ 70°C
applications and ratings
SR731E
(0402)
SR731J
(0603)
0.51Ω- 10Ω***
0.2Ω- 0.47Ω***
0.1Ω- 0.18Ω***
0.51Ω- 10Ω
0.2Ω- 0.47Ω
0.1Ω- 0.18Ω
0.1Ω- 10Ω0.1Ω- 10Ω0.1Ω- 10Ω
0.51Ω- 10Ω
0.2Ω- 0.47Ω1.11V 2.79V
1.41V 3.53V
0.1Ω- 0.18Ω
±200
±300
1/8W (.125W)
1/6W (.166W1)
1/5W (.2W)
SR732A
(0805) 1.58V 3.95V
1/4W (.25W)
1/3W (.33W1)
±500
±200
Resistance Range**T.C.R.
(ppm/°C)
Max.
-55°C
to
+150°C
-55°C to
+125°C
0.1Ω- 10Ω—
±100 —
— 0.1Ω- 10Ω±200 0.1Ω- 10Ω
— —±500 0.051Ω- 0.091Ω
— —±800 0.030Ω- 0.047Ω
SR732B
(1206) 1.81V 4.54V
1/3W (.33W)
1/2W (.5W1)
0.1Ω- 10Ω—±100 —
— 0.1Ω- 10Ω±200 0.1Ω- 10Ω
— —±500 0.056Ω- 0.091Ω
— —±800 0.030Ω- 0.051Ω
SR732H/W2H6
(2010) 2.73V 6.84V3/4W (.75W)
0.1Ω- 10Ω—±100 —
— 0.1Ω- 10Ω±200 0.1Ω- 10Ω
— —±500 0.056Ω- 0.091Ω
— —±800 0.033Ω- 0.051Ω
SR733A/W3A
(2512) 3.16V 7.90V1W
0.1Ω- 10Ω—±100 —
— 0.1Ω- 10Ω±200 0.1Ω- 10Ω
— —±500 0.056Ω- 0.091Ω
— —±800 0.039Ω- 0.051Ω
SR732E
(1210) 2.23V 5.59V
1/2W (.5W)
2/3W (.66W1)
0.1Ω- 10Ω—±100 —
— 0.1Ω- 10Ω±200 0.047Ω- 10Ω
— —±500 0.036Ω- 0.043Ω
— —±1000 0.024Ω- 0.033Ω
Derating Curve
Performance Characteristics
Surface Temperature Rise
environmental applications
% Rated Power
100
80
60
40
20
-60 -40 0 406080100160
70
20
Ambient Temperature
(°C)
0
-55
120
125
-20 140
150
1H
1E, 1J,
2A, 2B, 2E,
2H, 3A,
W2H, W3A
Temperature Rise
(°C)
180
160
120
80
40
25 50 75 100
% Rated Power
W3A (1W)
W2H (.75W)
2E (.5W)
2A (.25W)
)
0
0
140
100
60
20
2E (.66W)
2B (.5W)
2A (.33W)
1J (.2W)
1E (.166W)
2B (.33W)
Measuring Point
1E (.125W
1H (.1W)
resistors
E-24, E-96
(D±0.5%)
—
—
—
—
SR731H
(0201) 1Ω- 10Ω—0.47Ω- 10Ω1.0V 2.5V0.1W 0~ ±400 —
0.15Ω- 10Ω
—
—
—
0.15Ω- 10Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
NEW
Parameter
Requirement ∆R
Limit Typical Test Method
Resistance
T.C.R.
25°C
+25°C/-55°C and +25°C/+125°C
Within specified
tolerance
Within specified
T.C.R.
—
—
Overload (Short time) Rated Voltage x 2.5 for 5 seconds
±2% ±0.5%
Resistance to Solder Heat 260°C ± 5°C, 10 seconds ± 1 second
±3%*, ±1%** ±0.75%*, ±0.3%**
Rapid Change of Temperature -40°C (30 minutes), +125°C (30 minutes), 100 cycles
±1% ±0.3%
Moisture Resistance 40°C ± 2°C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3%*, ±2%** ±1%
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
±3%*, ±2%** ±1%
High Temperature Exposure 1H: +125°C, 1000 hours; 1E, 1J, 2A, 2B, 2E, W2H, W3A:+155°C, 1000 hours
±1% ±0.3%
* 1H
** 1E~W3A