SR73
lo-ohm 0.5%, 1%, 2%, 5% tolerance thick film
current sense resistor
* 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.
1 Prior to use, refer to the “Higher Power Ratings” in the beginning of catalog.
E-24, E-96
(F±1%) E-24
(G±2%) E-24
(J±5%)
Part
Designation*
Rated
Ambient
Temp.
Power
Rating
@ 70°C
applications and ratings (continued)
SR732A
(0805)
1/3W (.33W)
1/2W (.5W1)
Resistance RangeT.C.R.
(ppm/°C)
Max.
70°C
––
––
––
70°C
70°C
70°C
70°C
Rated
Terminal
Part Temp.
125°C
125°C
110°C
125°C
110°C
125°C
105°C
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) 1/2W (.5W1)
1/3W (.33W) 0.1Ω - 10Ω—±100 —
— 0.1Ω - 10Ω±200 0.1Ω - 10Ω
——±500 0.056Ω - 0.091Ω
——±800 0.030Ω - 0.051Ω
SR732H/W2H
(2010) 3/4W (.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) 1W 0.1Ω - 10Ω—±100 —
— 0.1Ω - 10Ω±200 0.1Ω - 10Ω
——±500 0.056Ω - 0.091Ω
——±800 0.039Ω - 0.051Ω
SR732E
(1210) 2/3W (.66W1)
1/2W (.5W) 0.1Ω - 10Ω—±100 —
— 0.1Ω - 10Ω±200 0.047Ω - 10Ω
— —±500 0.036Ω - 0.043Ω
— —±1000 0.024Ω - 0.033Ω
Performance Characteristics
E-24, E-96
(D±0.5%)
0.15Ω - 10Ω
—
—
—
0.15Ω - 10Ω
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Parameter Requirement ∆ R ±(%+0.005Ω)
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
1H: ±3%,
1E~W3A: ±1% 1H: ±0.75%
1E~W3A: ±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
1H: ±3%
1E~W3A: ±2% ±1%
Endurance at 70°C 70°C ± 2°C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
1H: ±3%
1E~W3A: ±2% ±1%
High Temperature Exposure 1H: +125°C, 1000 hours; 1E, 1J, 2A, 2B, 2E, 2H/W2H, 3A/W3A:+150°C, 1000 hours
±1% ±0.3%
Rated voltage = √Power rating x resistance value or max. working voltage, whichever is lower
71
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. 11/08/17
resistors
0.1Ω - 10Ω—
±100 —
— 0.1Ω - 10Ω±200 0.1Ω - 10Ω
——±500 0.051Ω - 0.091Ω
——±800 0.030Ω - 0.047Ω
0.15Ω - 10Ω
—
—
—
0.1Ω - 10Ω—
±100 —
— 0.1Ω - 10Ω±200 0.1Ω - 10Ω
— —±500 0.056Ω - 0.091Ω
— —±800 0.030Ω - 0.051Ω
0.15Ω - 10Ω
—
—
—
0.1Ω - 10Ω—
±100 —
— 0.1Ω - 10Ω±200 0.047Ω - 10Ω
— —±500 0.036Ω - 0.043Ω
— —±800 0.024Ω - 0.033Ω
—
—
—
—
Derating Curve
environmental applications
1E, 1J
2A: 0.33W
2B: 0.33W
2E: 0.5W
W2H, W3A
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.
SR73 2A (0.5W), SR73 2B (0.5W), SR73 2E (0.66W)