current
sense
SR73
lo-ohm 0.5%, 1%, 2%, 5% tolerance thick film
current sense resistor
EU
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 Dimensions inches (mm)
(Inch Size Code)
L Wc d t
.024.001 .012.001 .004.002 .006.002 .009.001
1H (0201)
(0.60.03) (0.30.03) (0.10.05) (0.150.05) (0.230.03)
+.004 +.004
.039 .02
-.002 -.002 .01.004 .01.004 .014.002
dimensions and construction
1E (0402)
+0.1 +0.1 (0.250.1) (0.250.1) (0.350.05)
(1.0 ) (0.5 )
-0.05 -0.05
+.006
.031
.063.008 -.004 .014.004 .014.004 .018.004
L
1J (0603)
c c +0.15
(1.60.2) (0.350.1) (0.350.1) (0.450.1)
(0.8 )
-0.1
+.008
.012
.079.008 .049.004 .016.008 -.004 .02.004
2A (0805)
(2.00.2) (1.250.1) (0.40.2) +0.2 (0.50.1)
(0.3 )
W
-0.1
.063.008
Solder
2B (1206)
(1.60.2)
.126.008
Plating
+.008
.016
(3.20.2) .102.008
-.004
2E (1210)
Ni
t (2.60.2) +0.2
(0.4 )
Plating
-0.1
2H (2010)
.197.008 .098.008
Protective Resistive Inner
d (5.00.2) (2.50.2) .026.006
.02.012 .024.004
W2H (2010)
Coating Film Electrode
(0.650.15)
(0.50.3) (0.60.1)
+.008
Ceramic .016
-.004
3A (2512)
Substrate
.248.008 .122.008
+0.2
(0.4 )
(6.30.2) (3.10.2) -0.1
.026.006
W3A (2512)
(0.650.15)
ordering information
SR73 2B T TD 1R00 F
Termination Nominal
Type Size Packaging Tolerance
Material Resistance
TC: 0201 only: 7" 2mm pitch pressed
1H T: Sn 2%, 5%: 2 significant figures D: 0.5%
paper (TC: 10,000 pcs/reel,
+ 1 multiplier R indicates
1E L: SnPb (1E, F: 1%
TCM: 15,000 pcs/reel)
decimal on value <10
1J, 2A, 2B, 2E,
1J G:2%
TPL:0402 only: 2mm pitch punch paper
2H, 3A) 1%: 3 significant figures
2A J: 5%
TP: 0402, 0603, 0805: 7" 2mm pitch
+ 1 multiplier R indicates
G: Au (1J, 2A, 2B:
punch paper
2B
decimal on value <100
0.1 - 10 -
TD: 0603, 0805, 1206, 1210: 7" 4mm
2E
contact factory) All values less than 0.1
pitch punched paper
W2H (100m) are expressed in
TDD: 0603, 0805, 1206, 1210: 10" paper tape
m with L as decimal
W3A
TE: 0805, 1206, 1210, 2010 & 2512:
Example: 20m = 20L
2H
7" embossed plastic
(3-digit)
3A TED: 0805, 1206, 1210, 2010 & 2512:
10" embossed plastic
For further information on packaging, please
refer to Appendix A
applications and ratings
Power Rated Rated T.C.R. Resistance Range
Part
Rating Ambient Terminal (ppm/C)
Designation* E-24, E-96 E-24, E-96 E-24 E-24
@ 70C Temp. Part Temp. Max.
(D0.5%) (F1%)** (G2%) (J5%)
0 ~ +400 0.27 - 10
SR731H 1 - 10**
0.1W 70C
(0201)
0 ~ +500 0.18 - 0.24
200 0.51 - 10** 0.51 - 10 0.51 - 10
SR731E
300 0.2 - 0.47** 0.2 - 0.47 0.2 - 0.47
1/6W (.166W) 70C 125C
(0402)
500 0.1 - 0.18** 0.1 - 0.18 0.1 - 0.18
200 1.02 - 10 1.1 - 10 1.1 - 10
1/5W (.2W) 70C 125C
SR731J
(0603) 200 0.1 - 1 0.1 - 1 0.1 - 1
New 1/4W (.25W) 70C 125C
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 10/26/18
148 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)
Power Rated Rated T.C.R. Resistance Range
Part
Rating Ambient Terminal (ppm/C)
Designation* E-24, E-96 E-24, E-96 E-24 E-24
@ 70C Temp. Part Temp. Max.
(D0.5%) (F1%)** (G2%) (J5%)
100 0.15 - 10 0.1 - 10
200 0.1 - 10 0.1 - 10
1/3W (.33W) 70C
125C
500 0.051 - 0.091
SR732A 800 0.030 - 0.047
100 0.15 - 10 0.1 - 10
(0805)
200 0.1 - 10 0.1 - 10
1
1/2W (.5W ) 105C
500 0.051 - 0.091
800 0.030 - 0.047
100 0.15 - 10 0.1 - 10
200 0.1 - 10 0.1 - 10
1/3W (.33W) 70C 125C
500 0.056 - 0.091
800 0.030 - 0.051
SR732B
100 0.15 - 10 0.1 - 10
(1206)
200 0.1 - 10 0.1 - 10
1
1/2W (.5W ) 110C
500 0.056 - 0.091
800 0.030 - 0.051
100 0.1 - 10
200 0.1 - 10 0.047 - 10
1/2W (.5W) 70C 125C
500 0.036 - 0.043
1000 0.024 - 0.033
SR732E
100 0.1 - 10
(1210)
200 0.1 - 10 0.047 - 10
1
2/3W (.66W ) 110C
500 0.036 - 0.043
800 0.024 - 0.033
100 0.1 - 10
SR732H/W2H
200 0.1 - 10 0.1 - 10
3/4W (.75W)
70C 125C
500 0.056 - 0.091
(2010)
800 0.033 - 0.051
100 0.1 - 10
SR733A/W3A
200 0.1 - 10 0.1 - 10
1W
70C 125C
500 0.056 - 0.091
(2512)
800 0.039 - 0.051
* Parentheses indicate EIA package size codes. ** 1H, 1E (F: 1%) E-24 values only. Operating Temp: -55C to +125C (SR731H only), -55C to +150C
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. Rated voltage = Power rating x resistance value or max. working voltage, whichever is lower
environmental applications
Derating Curve
SR73 2A (0.5W), SR73 2B (0.5W), SR73 2E (0.66W)
1E, 1J
2A: 0.33W
2B: 0.33W
2E: 0.5W
W2H, W3A
For resistors operated at an ambient temperature For resistors operated at a terminal part temperature of described for each size or above, a power rating shall be derated in
of 70C or above, a power rating shall be derated accordance with the derating curve.
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
Requirement R (%+0.005 )
Parameter Limit Typical Test Method
Within specified
Resistance 25C
tolerance
Within specified
T.C.R. +25C/-55C and +25C/+125C
T.C.R.
Overload (Short time) 2% 0.5% Rated voltage x 2.5 for 5 seconds
1H: 3%, 1H: 0.75%
Resistance to Solder Heat 260C 5C, 10 seconds 1 second
1E~W3A: 1% 1E~W3A: 0.3%
Rapid Change of Temperature 1% 0.3% -40C (30 minutes), +125C (30 minutes), 100 cycles
1H: 3%
Moisture Resistance 1% 40C 2C, 90%-95% RH, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
1E~W3A: 2%
1H: 3%
Endurance at 70C 1% 70C 2C, 1000 hours, 1.5 hr ON, 0.5 hr OFF cycle
1E~W3A: 2%
High Temperature Exposure 1% 0.3% 1H: +125C, 1000 hours; 1E, 1J, 2A, 2B, 2E, 2H/W2H, 3A/W3A:+150C, 1000 hours
Specifications given herein may be changed at any time without prior notice. Please confirm technical specifications before you order and/or use. 11/06/18
KOA Speer Electronics, Inc. 199 Bolivar Drive Bradford, PA 16701 USA 814-362-5536 Fax: 814-362-8883 www.koaspeer.com 149
current
sense