32 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
features
•RuO2thick film resistor element
•Anti-leaching nickel barrier terminations
•Meets or exceeds EIA 575, EIA PDP-100, MIL-R-55342F
•Marking: Three or four digits on indigo protective coat,
1E size: no marking,
1H: no marking, black protective coat
•Products with lead-free terminations meet EU RoHS
requirements. Pb located in glass material, electrode
and resistor element is exempt per Annex 1, exemption
5 of EU directive 2005/95/EC
ordering information
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
T: Sn
(Other termination
styles may be
available, please
contact factory
for options)
G: Au (2A: 0.1Ω-
10Ω- contact
factory)
±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
mΩwith “L” as decimal
Example: 20mΩ= 20L0
1H
1E
1J
2A
2B
2E
2H
3A
W2H
W3A
TCM: 0201 only:
7" 2mm pitch pressed paper
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" punched plastic
TED: 0805, 1206, 1210, 2010 & 2512:
10" punched plastic
For further information on packaging,
please refer to Appendix A
SR73
Type Size Nominal
Resistance Tolerance
Termination
Material Packaging
New Part # 2B TD 1R00 FT
dimensions and construction
Protective
Coating Inner
Electrode
Resistive
Film
Ceramic
Substrate
Solder
Plating
Ni
Plating
Lcc
W
t
d
Type
L
.039 +.004
-.002
(1.0 +0.1 )
-0.05
.01±.004
(0.25±0.1)
.012 +.008
-.004
(0.3 +0.2)
-0.1
.016 +.008
-.004
(0.4 +0.2)
-0.1
.016 +.008
-.004
(0.4 +0.2)
-0.1
.014±.002
(0.35±0.05)
.018±.004
(0.45±0.1)
.014±.004
(0.35±0.1)
.02±.004
(0.5±0.1)
.024±.004
(0.6±0.1)
.01±.004
(0.25±0.1)
.014±.004
(0.35±0.1)
.016±.008
(0.4±0.2)
.02±.012
(0.5±0.3)
.009±.001
(0.23±0.03)
.006±.002
(0.15±0.05)
.026±.006
(0.65±0.15)
.026±.006
(0.65±0.15)
.004±.002
(0.1±0.05)
.063±.008
(1.6±0.2)
.102±.008
(2.6±0.2)
.098±.008
(2.5±0.2)
.126±.008
(3.2±0.2)
.049±.004
(1.25±0.1)
.031 +.006
-.004
(0.8 +0.15)
-0.1
.02 +.004
-.002
(0.5 +0.1 )
-0.05
.063±.008
(1.6±0.2)
.079±.008
(2.0±0.2)
.197±.008
(5.0±0.2)
.024±.001
(0.6±0.03)
1E
(0402)
1J
(0603)
2A
(0805)
2B
(1206)
.012±.001
(0.3±0.03)
1H
(0201)
2H
(2010)
W2H
(2010)
.122±.008
(3.1±0.2)
.248±.008
(6.3±0.2)
3A
(2512)
W3A
(2512)
(Inch Size Code) Wc d t
Dimensions inches (mm)
2E
(1210)
resistors
EU
NEW
33
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
