CSM3637S
Vishay Foil Resistors
Bulk Metal
®
Foil Technology High Precision, Current Sensing, Power
Surface Mount, Metal Strip Resistor with Improved Stability 0.05 %,
Resistance Value from 10 mΩ, Rated Power to 2 W and TCR to 0 ± 20 ppm/°C
FEATURES
•
Temperature coefficient of resistance (TCR):
(- 55 °C to + 125 °C, + 25 °C ref.)
± 20 ppm/°C maximum
•
Load life stability to ± 0.05 % (70 °C, 2000 h
at rated power)
•
Power rating: 2 W
•
Tolerance: ± 0.2 %
INTRODUCTION
The CSM3637S is a low value current sense resistor,
providing power and precision in a four terminal, surface
mount configuration. Its all welded construction is made up
of a Bulk Metal
®
resistive element with plated copper
terminations.
There are many current sense resistors on the market, until
now the combination of very stable and precise resistors
with low TCR as much as 0 ppm/°C ± 20 ppm/°C, tight
tolerance of ± 0.1 % and excellent load life stability of
± 0.05 % (2000 h, + 70 °C at rated power) were not easily
available.
The key performance of the new CSM3637S is stability,
which is the ability of this resistor to maintain its value with
time under nominal load at various environmental
conditions.
These specifications are based on tests performed in
accordance with methods prescribed by appropriate
MIL-PRF standards.
The four terminal device separates the current leads from
the voltage drop sensing leads. This configuration
eliminates the effect of the lead wire resistance from points
A to B and C to D.
A key feature of the CSM3637S is its low thermal EMF
design. The welded terminals make intimate contact with
the chip thereby minimizing temperature variations.
Our application engineering department is available to
advise and make recommendations.
For non-standard technical requirements and special
applications, please contact:
foil@vishay.com
•
Resistance range: 10 mΩ to 100 mΩ
•
Vishay Foil resistors are not restricted to standard values;
specific “as required” values can be supplied at no extra
cost or delivery (e.g. 10.2345 mΩ vs. 10 mΩ)
•
Short time overload: ± 0.1 % typical
•
Proprietary processing technique produces extremely low
resistance values with improved stability
•
All welded construction
•
Solderable terminations
•
Very low inductance 0.5 nH to 5 nH
•
Excellent frequency response to 50 MHz
•
Low thermal EMF (< 3 µV/°C)
•
Maximum current: up to 14 A
•
Four terminal (Kelvin) design: allows for precision accurate
measurements
•
Terminal finish: lead (Pb)-free or tin/lead alloy
•
Compliant to RoHS directive 2002/95/EC
•
Prototype quantities available in just 5 working days
or sooner. For more information, please contact
foil@vishay.com
•
Screening in accordance with EEE-INST002 available
(MIL-PRF-55342 and MIL-PRF-49465)
•
For better performances please contact us
FIGURE 1 - POWER DERATING CURVE
Percent of Rated Power
+ 70 °C
100
80
60
40
20
0
- 65 - 50
- 25
0
25
50
75
100
125
150
170
R
I
I
A
B
V
C
D
Ambient Temperature (°C)
* Pb containing terminations are RoHS compliant, exemptions may apply
Document Number: 63168
Revision: 24-Jun-09
For any questions, contact:
foil@vishay.com
www.vishay.com
1
CSM3637S
Vishay Foil Resistors
TABLE 1 - PERFORMANCE SPECIFICATIONS
PARAMETER
Resistance Range
Power Rating at 70 °C
Maximum Current
Best Tolerance
Temperature Coefficient Maximum (- 55 °C to + 125 °C, + 25 °C ref.)
Operating Temperature Range
Weight (maximum)
CSM3637S
10 mΩ to 100 mΩ
2W
14 A
± 0.2 %
± 20 ppm/°C
- 65 °C to + 170 °C
0.29 g
FIGURE 2 - DIMENSIONS AND IMPRINTING
in inches (millimeters)
CSM3637S DIMENSIONS
(1)
CSM3637S LAND PATTERN
E
1
I
1
E
2
c
A
B
I
W
I
2
d
b
H
L
T
a
DIMENSIONS - TOLERANCES ± 0.010 (± 0.254)
RESISTANCE RANGE (mΩ)
10 to 100
L
0.360 (9.144)
W
0.370 (9.398)
H
0.025 (0.635)
T
0.086 (2.184)
A
0.061 (1.549)
B
0.032 (0.813)
LAND PATTERN DIMENSIONS - TOLERANCES ± 0.003 (± 0.076)
RESISTANCE RANGE (mΩ)
10 to 100
a
0.130 (3.30)
b
0.364 (9.24)
c
0.052 (1.32)
d
0.031 (0.78)
e
-
l
0.186 (4.72)
Note
(1)
White dots indicate top side of part for mounting purposes
TABLE 2 - CSM3637S PERFORMANCE SPECIFICATIONS
TEST
Thermal Shock
Load Life Stability
Bias Humidity
Short Time Overload
High Temperature Exposure
Low Temperature Storage
Moisture Resistance
Shock
Vibration
Resistance to Soldering Heat
Solderability
Note
• Measurement error 0.0005R per MIL-PRF-49465
CONDITIONS
- 55 °C to + 150 °C, 1000 cycles,
15 min at each extreme
2000 h, 70 °C at rated power
85 °C, 85 % humidity, 10 % bias, 1000 h
5 x rated power for 5 s
1000 h, 170 °C
MIL-PRF-49465
MIL-STD-202, method 106, 0 % power,
7a and 7b not required
100 g, 6 ms
(10 Hz to 2000 Hz) 20 g
10 s to 12 s at + 260 °C
MIL-STD-202
MIL-PRF-49465B
ΔR
LIMITS
± (0.5 % + 0.0005R)
± (1.0 % + 0.0005R)
± (0.5 % + 0.0005R)
± (0.5 % + 0.0005R)
± (1.0 % + 0.0005R)
± (0.5 % + 0.0005R)
± (0.5 % + 0.0005R)
± (0.1 % + 0.0005R)
± (0.1 % + 0.0005R)
± (0.25 % + 0.0005R)
95 % coverage
TYPICAL
ΔR
LIMITS
0.1 %
0.05 %
0.05 %
0.1 %
0.2 %
0.05 %
0.02 %
0.02 %
0.02 %
0.05 %
-
MAXIMUM
ΔR
LIMITS
0.2 %
0.2 %
0.2 %
0.2 %
0.3 %
0.1 %
0.05 %
0.05 %
0.05 %
0.1 %
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2
For any questions, contact:
foil@vishay.com
Document Number: 63168
Revision: 24-Jun-09
CSM3637S
Vishay Foil Resistors
POWER METAL STRIP
®
CSM3637S CONSTRUCTION
1. Resistive element
2. Copper terminal with solderable finish
3. Terminal-to-element weld
4. High temperature encapsulation
TABLE 3 - GLOBAL PART NUMBER INFORMATION
(1)
NEW GLOBAL PART NUMBER: Y14720R10000E0R (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
CHARACTERISTICS
0
= standard part, tin/lead termination
9
= standard part, lead (Pb)-free termination
1 to 999
= custom
Y
1
4
7
2
0
R
1
0
0
0
0
E
0
R
PRODUCT CODE
1472
= CSM3637S
RESISTANCE TOLERANCE
E
C
D
F
= ± 0.2 %
= ± 0.25 %
= ± 0.5 %
= ± 1.0 %
PACKAGING
W
= waffle pack
R
= tape and reel
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1472 0R10000 E 0 R:
TYPE: CSM3637S
VALUE: 100.0 mΩ
ABSOLUTE TOLERANCE: ± 0.2 %
TERMINATION: standard tin/lead
PACKAGING: tape and reel
HISTORICAL PART NUMBER: CSM3637S 0R1000 E B T (will continue to be used)
CSM3637S
MODEL
0R1000
OHMIC VALUE
0R1000
= 0.100
Ω
E
ABS. TOLERANCE
E
C
D
F
= ± 0.2 %
= ± 0.25 %
= ± 0.5 %
= ± 1.0 %
B
TERMINATION
S
= lead (Pb)-free
B
= tin/lead
T
PACKAGING
T
= tape and reel
W
= waffle pack
Note
(1)
For non-standard requests, please contact application engineering.
Document Number: 63168
Revision: 24-Jun-09
For any questions, contact:
foil@vishay.com
www.vishay.com
3
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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1
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