SR73
resistors
lo-ohm 0.5%, 1%, 2%, 5% tolerance thick film
current sense resistor
EU
features
RuO
2
thick 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
•
•
•
•
dimensions and construction
NEW
c
L
c
Type
(Inch Size Code)
L
Dimensions
inches
(mm)
W
c
d
t
1H
(0201)
1E
(0402)
1J
(0603)
2A
(0805)
2B
(1206)
2E
(1210)
2H
(2010)
W2H
(2010)
3A
(2512)
W3A
(2512)
.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
(1.0
+.004
-.002
+0.1
-0.05
)
W
Solder
Plating
t
d
Protective
Coating
Resistive Inner
Film
Electrode
Ni
Plating
.02
(0.5
+.004
-.002
+0.1
-0.05
)
+.006
-.004
+0.15
)
-0.1
.01±.004
(0.25±0.1)
.01±.004 .014±.002
(0.25±0.1) (0.35±0.05)
.063±.008
(1.6±0.2)
.031
(0.8
.014±.004 .014±.004 .018±.004
(0.35±0.1) (0.35±0.1) (0.45±0.1)
.012
(0.3
+.008
-.004
+0.2
-0.1
)
Ceramic
Substrate
.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)
.016
(0.4
+.008
-.004
+0.2
)
-0.1
.02±.012
(0.5±0.3)
.026±.006 .024±.004
(0.65±0.15) (0.6±0.1)
.016
(0.4
+.008
-.004
+0.2
)
-0.1
.248±.008 .122±.008
(6.3±0.2)
(3.1±0.2)
.026±.006
(0.65±0.15)
ordering information
New Part #
SR73
Type
2B
Size
1H
1E
1J
2A
2B
2E
2H
3A
W2H
W3A
T
Termination
Material
T: Sn
(Other termination
styles may be
available, please
contact factory
for options)
G: Au (2A: 0.1Ω -
10Ω - contact
factory)
TD
Packaging
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
1R00
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 = 20L0
F
Tolerance
D: ±0.5%
F: ±1%
G: ±2%
J: ±5%
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
32
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
Part
Designation*
NEW
SR731H
(0201)
SR731E
(0402)
SR731J
(0603)
SR732A
(0805)
SR732B
(1206)
SR732E
(1210)
SR732H/W2H
6
(2010)
SR733A/W3A
(2512)
Power
Rating
@ 70°C
0.1W
1/8W (.125W)
1/6W (.166W
1
)
1/5W (.2W)
1/4W (.25W)
1/3W (.33W
1
)
1/3W (.33W)
1/2W (.5W
1
)
1/2W (.5W)
2/3W (.66W
1
)
3/4W (.75W)
1W
T.C.R.
(ppm/°C)
Max.
0~ ±400
±200
±300
±500
±200
±100
±200
±500
±800
±100
±200
±500
±800
±100
±200
±500
±1000
±100
±200
±500
±800
±100
±200
±500
±800
Resistance Range**
E-24, E-96 E-24, E-96
(D±0.5%)
(F±1%)
—
—
—
—
—
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
—
—
—
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
—
—
E-24
(J±5%)
0.47Ω - 10Ω
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
0.056Ω - 0.091Ω
0.030Ω - 0.051Ω
—
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
Working
Voltage
1.0V
1.11V
1.41V
1.58V
1.81V
2.23V
2.73V
3.16V
Maximum
Overload
Voltage
(5 Secs. Max.)
2.5V
2.79V
3.53V
3.95V
4.54V
5.59V
6.84V
7.90V
Operating
Temperature
Range
-55°C to
+125°C
-55°C
to
+150°C
* Parenthesis indicate EIA package size codes.
** See Appendix D for available decade values.
1
Please contact factory for limitation of Surface Mount Temp. Rise
6
SR73W3AS (2010 size, 1 Watt) with limited Resistance Range - contact factory for details
*** 1H, 1E (F: ±1%) E-24 values only.
environmental applications
Derating Curve
100
80
% Rated Power
60
1H
1E, 1J,
2A, 2B, 2E,
2H, 3A,
W2H, W3A
Surface Temperature Rise
180
160
Temperature Rise
(°C)
140
120
100
80
60
40
20
0
W2H (.75W)
2E (.66W)
2B (.5W)
2A (.33W)
2E (.5W)
2B (.33W)
2A (.25W)
1E (.166W)
1J (.2W)
1H (.1W)
1E (.125W)
W3A (1W)
40
20
0
-60 -40 -20
-55
Measuring Point
0
80 100 120 140 160
70
125 150
Ambient Temperature
(°C)
20
40
60
0
25
50
75
100
% Rated Power
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
* 1H
** 1E~W3A
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
Requirement
∆
R
Limit
Typical
Within specified
—
tolerance
Within specified
—
T.C.R.
±2%
±0.5%
±3%*, ±1%** ±0.75%*, ±0.3%**
±1%
±0.3%
±3%*, ±2%**
±1%
±3%*, ±2%**
±1%
±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, W2H, W3A:+155°C, 1000 hours
KOA Speer Electronics, Inc.
• 199 Bolivar Drive • Bradford, PA 16701 • USA • 814-362-5536 • Fax: 814-362-8883 • www.koaspeer.com
33
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