CSM
Vishay Foil Resistors
Bulk Metal
®
Technology High Precision, Current Sensing,
Power Surface Mount, Metal Strip Resistor with Resistance Value
from 2 mΩ, Rated Power up to 3 Watts and TCR to 0 ± 15 ppm/°C
FEATURES
Any value at any tolerance available within resistance range
The CSM Series of low value current sense resistors
provides 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. Our Application Engineering Department is
available to advise and make recommendations.
For non-standard technical requirements and special
applications, please contact us.
Percent of Rated Power
IM
PR
O
VE
D
TABLE 1 - PERFORMANCE SPECIFICATIONS
PARAMETER
Resistance Range
3 mΩ - 200 mΩ
1 Watt
Power Rating at 70 °C
Maximum Current
Tightest Tolerance
Temperature Coefficient (- 55 °C to + 125 °C)
Operating Temperature Range
Weight (maximum)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63089
Revision: 06-Nov-06
For technical questions, contact: foil@vishay.com
www.vishay.com
1
PR
O
DU
CT
•
Temperature coefficient: ± 15 ppm/°C (3 mΩ up)
•
Tolerance: ± 0.1 %
•
Thermal EMF: 3 µV/°C
Pb-free
Available
•
Ohmic Values: 2 mΩ to 200 mΩ
RoHS*
COMPLIANT
THROUGH HOLE
•
Four terminal (Kelvin) design: allows for precision accurate
measurements
•
Surface mount configuration
•
Power Rating: 1 to 3 Watts
•
Maximum Current: up to 38 Amps
•
Terminal Finishes Available: Lead (Pb)-free
Tin/Lead Alloy
•
For better performance please contact us
FIGURE 1 - POWER DERATING CURVE
+ 70 °C
100
80
60
40
20
0
- 65 - 50
- 25
0
25
50
75
100
125
150
170
Ambient Temperature (°C)
CSM2512
CSM3637
2 mΩ - 200 mΩ
3 Watts ( 2 mΩ - 10 mΩ)
2 Watts (> 10 mΩ - 200 mΩ)
38 Amps
± 0.1 %
± 25 ppm/°C (2 mΩ - < 3 mΩ)
± 15 ppm/°C (3 mΩ - 200 mΩ)
- 55 °C to + 125 °C; ref. + 25 °C
0.29 grams
18 Amps
± 15 ppm/°C
0.09 grams
CSM
Vishay Foil Resistors
Bulk Metal
®
Technology High Precision, Current Sensing,
Power Surface Mount, Metal Strip Resistor with Resistance Value
from 2 mΩ, Rated Power up to 3 Watts and TCR to 0 ± 15 ppm/°C
FIGURE 2 - DIMENSIONS AND IMPRINTING
in inches (millimeters)
CSM2512 DIMENSIONS
#
#
CSM3637 DIMENSIONS
H
B
L
T
W
A
PR
O
DU
CT
H
A
B
L
W
T
CSM2512 LAND PATTERN
I
1
e
E
1
E
2
I
2
I
d
b
CSM3637 LAND PATTERN
E
1
I
1
c
E
2
c
I
2
Kelvin Connection
I
1
, I
2
- Current
E
1
, E
2
- Sense
MODEL
a
I
d
b
a
DIMENSIONS - TOLERANCES ± 0.010 (± 0.254), * ± 0.015 (± 0.381)
RESISTANCE RANGE, mΩ
3 to < 5
L
W
H
T
A
B
IM
PR
O
VE
D
0.083 (2.108)
0.025 (0.635)
0.047 (1.194)
0.032 (0.813)
0.025 (0.635)
0.086 (2.18)
0.061 (1.55)
0.032 (0.813)
0.030* (0.762)
0.025* (0.635)
CSM2512
5 to < 7
0.25 (6.35)
0.125 (3.175)
7 to 200
CSM3637
2 to 200
0.360 (9.14)
0.370 (9.4)
LAND PATTERN DIMENSIONS - TOLERANCES ± 0.003 (± 0.076)
MODEL
a
b
c
d
0.020 (0.51)
0.244 (0.61)
e
0.055 (1.40)
-
I
0.065 (1.65)
0.178 (4.52)
CSM2512
CSM3637
0.125 (3.18)
0.116 (2.95)
0.130 (3.30)
0.366 (9.30)
0.030 (0.76)
0.066 (1.68)
Note
# White dot indicates top side of part for mounting purposes
TABLE 2 - ORDERING INFORMATION
MODEL
RESISTANCE VALUE
3 mΩ - 200 mΩ
LETTER DESIGNATOR*
TOLERANCE
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
TERMINATION
S = Lead (Pb)-free
B = Tin/Lead
PACKAGING
W = Waffle Pack
T =Tape and Reel
CSM2512
CSM3637
2 mΩ - 200 mΩ
R
* Resistance Value in
Ω,
is expressed by a series of 6 characters, 5 of with represent significant digits while the 6th letter designates the location
of the comma or decimal.
Example:
0R0100 = 0.010
Ω
SALES
• ASIA/JAPAN: foilsales.asia@vishay.com
• UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• AMERICAS: foilsales.usa@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com • ISRAEL: foilsales.israel@vishay.com
www.vishay.com
2
For technical questions, contact: foil@vishay.com
Document Number: 63089
Revision: 06-Nov-06
THROUGH HOLE
Legal Disclaimer Notice
Vishay
Notice
Specifications of the products displayed herein are subject to change without notice. Vishay Intertechnology, Inc.,
or anyone on its behalf, assumes no responsibility or liability for any errors or inaccuracies.
Information contained herein is intended to provide a product description only. No license, express or implied, by
estoppel or otherwise, to any intellectual property rights is granted by this document. Except as provided in Vishay's
terms and conditions of sale for such products, Vishay assumes no liability whatsoever, and disclaims any express
or implied warranty, relating to sale and/or use of Vishay products including liability or warranties relating to fitness
for a particular purpose, merchantability, or infringement of any patent, copyright, or other intellectual property right.
The products shown herein are not designed for use in medical, life-saving, or life-sustaining applications.
Customers using or selling these products for use in such applications do so at their own risk and agree to fully
indemnify Vishay for any damages resulting from such improper use or sale.
Document Number: 91000
Revision: 08-Apr-05
www.vishay.com
1
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