SR
Vishay Dale
Wirewound Resistors, Open Air, Current Sense, Low Value
FEATURES
•
Open air design
•
Low resistance values for all types of current
sensing, voltage division and pulse applications
including switching and linear supplies,
instrumentation and power amplifiers
•
All welded construction
•
Solid metal nickel-chrome or copper-nickel alloy
resistive element
•
Solderable terminations
•
Very low inductance
•
AEC-Q200 qualified available
(1)
•
Compliant to RoHS Directive 2002/95/EC
Note
(1)
Flame retardance test may not be applicable to some resistor
technologies.
STANDARD ELECTRICAL SPECIFICATIONS
MODEL
SR1
SR3
SR5
POWER RATING
P
70 °C
W
1.0
3.0
5.0
TOLERANCE
±%
1, 5
1, 5
1, 5
RESISTANCE RANGE
Ω
0.005 to 0.03
0.005 to 0.05
0.004 to 0.05
TECHNICAL SPECIFICATIONS
PARAMETER
Temperature Coefficient
Operating Temperature Range
Maximum Continuous Current
UNIT
ppm/°C
°C
A
SR Resistor Characteristics
0.004
Ω
to 0.005
Ω
= ± 300
0.0051
Ω
to 0.0099
Ω
= ± 175
0.01
Ω
to 0.05
Ω
= ± 100
- 65 to + 275
(P/R)
1/2
GLOBAL PART NUMBER INFORMATION
Global Part Numbering Example: SR55L000JE14
S
R
5
5
L
0
0
0
J
E
1
4
GLOBAL MODEL
SR1
SR3
SR5
VALUE
L
= mΩ
(below 0.01
Ω)
R
= Decimal
5L000
= 0.005
Ω
R0100
= 0.01
Ω
TOLERANCE
F
= ± 1.0 %
J
= ± 5.0 %
K
= ± 10 %
PACKAGING
E14
=
Lead (Pb)-free bulk
B14
=
Tin/lead bulk
SPECIAL
(Dash Number)
(up to 3 digits)
From
1 to 999
as
applicable
* Pb containing terminations are not RoHS compliant, exemptions may apply
** Please see document “Vishay Material Category Policy”:
www.vishay.com/doc?99902
www.vishay.com
164
For technical questions, contact:
ww2aresistors@vishay.com
Document Number: 31067
Revision: 18-Nov-10
SR
Wirewound Resistors, Open Air,
Current Sense, Low Value
DIMENSIONS
in inches [millimeters]
Vishay Dale
SR1
SR3 and SR5
0.050 ± 0.010
[1.27 ± 0.254]
0.312
[7.95]
typ.
C
F
A
E
A
B
0.112
[2.85]
max.
C
E
F
MODEL
SR1
SR3
SR5
DIMENSIONS
in inches [millimeters]
A
0.450 + 0.020
[11.43 + 0.508]
0.600 + 0.040/- 0.020
[15.24 + 1.020/- 0.508]
0.800 + 0.040/- 0.020
[20.32 + 1.020/- 0.508]
B
-
0.125 ± 0.030
[3.18 ± 0.762]
C
E
0.070
[1.78]
0.065 + 0.010/- 0.005
[1.65 + 0.254/- 0.127]
0.040 ± 0.002
[1.02 ± 0.051]
F
1.0 maximum
[25.4 maximum]
MATERIAL SPECIFICATIONS
Element:
Nickel-chrome or copper-nickel alloy depending
on resistance value
Terminals:
Tinned copper
Encapsulation:
None
Marking:
None
RATED POWER IN
%
120
100
80
60
40
20
0
- 65
- 25
25
125
175
225
275
75
70
AMBIENT TEMPERATURE IN °C
Derating
PERFORMANCE
TEST
Temperature Cycling
Low Temperature Storage
High Temperature Exposure
Bias Humidity
Mechanical Shock
Vibration
Load Life
Resistance to Solder Heat
Moisture Resistance
CONDITIONS OF TEST
- 55 °C to + 125 °C, 1000 cycles, 15 min at each extreme
- 65 °C for 24 h
1000 h at + 275 °C
+ 85 °C, 85 % RH, 10 % bias, 1000 h
100 g’s for 11 ms, 5 pulses
Frequency varied 10 Hz to 2000 Hz in 1 min, 3 directions, 12 h
1000 h at rated power, + 70 °C, 1.5 h “ON”, 0.5 h “OFF”
+ 260 °C solder, 10 s to 12 s dwell, 25 mm/s emergence
MIL-STD-202 Method 106, 0 % power, 7a and 7b not required
TEST LIMITS
± (1.0 % + 0.0005
Ω) ΔR
± (0.5 % + 0.0005
Ω) ΔR
± (2.0 % + 0.0005
Ω) ΔR
± (1.0 % + 0.0005
Ω) ΔR
± (0.2 % + 0.0005
Ω) ΔR
± (0.2 % + 0.0005
Ω) ΔR
± (2.0 % + 0.0005
Ω) ΔR
± (0.5 % + 0.0005
Ω) ΔR
± (0.5 % + 0.0005
Ω) ΔR
Document Number: 31067
Revision: 18-Nov-10
For technical questions, contact:
ww2aresistors@vishay.com
www.vishay.com
165
Legal Disclaimer Notice
Vishay
Disclaimer
All product specifications and data are subject to change without notice.
Vishay Intertechnology, Inc., its affiliates, agents, and employees, and all persons acting on its or their behalf
(collectively, “Vishay”), disclaim any and all liability for any errors, inaccuracies or incompleteness contained herein
or in any other disclosure relating to any product.
Vishay disclaims any and all liability arising out of the use or application of any product described herein or of any
information provided herein to the maximum extent permitted by law. The product specifications do not expand or
otherwise modify Vishay’s terms and conditions of purchase, including but not limited to the warranty expressed
therein, which apply to these products.
No license, express or implied, by estoppel or otherwise, to any intellectual property rights is granted by this
document or by any conduct of Vishay.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications unless
otherwise expressly indicated. Customers using or selling Vishay products not expressly indicated for use in such
applications do so entirely at their own risk and agree to fully indemnify Vishay for any damages arising or resulting
from such use or sale. Please contact authorized Vishay personnel to obtain written terms and conditions regarding
products designed for such applications.
Product names and markings noted herein may be trademarks of their respective owners.
Document Number: 91000
Revision: 18-Jul-08
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