IMPROVED PRODUCT
Document Number: 63089 For technical questions, contact: foil@vishay.com www.vishay.com
Revision: 06-Nov-06 1
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
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.
FEATURES
•Ohmic Values: 2 mΩ to 200 mΩ
•Temperature coefficient: ± 15 ppm/°C (3 mΩ up)
•Tolerance: ± 0.1 %
•Thermal EMF: 3 µV/°C
•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
* Pb containing terminations are not RoHS compliant, exemptions may apply
FIGURE 1 - POWER DERATING CURVE
Available
Pb-free
RoHS*
COMPLIANT
- 65 - 50 - 25 0 25 50 75 100 125 150 170
Ambient Temperature (°C)
100
80
60
40
20
0
Percent of Rated Power
+ 70 °C
TABLE 1 - PERFORMANCE SPECIFICATIONS
PARAMETER CSM2512 CSM3637
Resistance Range 3 mΩ - 200 mΩ2 mΩ - 200 mΩ
Power Rating at 70 °C 1 Watt 3 Watts ( 2 mΩ - 10 mΩ)
2 Watts (> 10 mΩ - 200 mΩ)
Maximum Current 18 Amps 38 Amps
Tightest Tolerance ± 0.1 %
Temperature Coefficient (- 55 °C to + 125 °C) ± 15 ppm/°C ± 25 ppm/°C (2 mΩ - < 3 mΩ)
± 15 ppm/°C (3 mΩ - 200 mΩ)
Operating Temperature Range - 55 °C to + 125 °C; ref. + 25 °C
Weight (maximum) 0.09 grams 0.29 grams
THROUGH HOLE
CSM
Vishay Foil Resistors
Bulk Metal
®
Technology High Precision, Current Sensing,
Power Surface Mount, Metal Strip Resistor with Resistance Value
from 2 m
Ω
, Rated Power up to 3 Watts and TCR to 0 ± 15 ppm/°C
www.vishay.com For technical questions, contact: foil@vishay.com Document Number: 63089
2Revision: 06-Nov-06
SALES
• AMERICAS: foilsales.usa@vishay.com • ASIA/JAPAN: foilsales.asia@vishay.com • UK/HOLLAND/SCANDINAVIA: foilsales.eunorth@vishay.com
• GERMANY/CZECH REPUBLIC/AUSTRIA: foilsales.eucentral@vishay.com • FRANCE/SWITZERLAND/SOUTHERN EUROPE: foilsales.eusouth@vishay.com • ISRAEL: foilsales.israel@vishay.com
IMPROVED PRODUCT
Note
# White dot indicates top side of part for mounting purposes
* 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
FIGURE 2 - DIMENSIONS AND IMPRINTING in inches (millimeters)
DIMENSIONS - TOLERANCES ± 0.010 (± 0.254), * ± 0.015 (± 0.381)
MODEL RESISTANCE RANGE, mΩLWHTAB
CSM2512
3 to < 5
0.25 (6.35) 0.125 (3.175) 0.025 (0.635)
0.083 (2.108)
0.030* (0.762) 0.025* (0.635)5 to < 7 0.047 (1.194)
7 to 200 0.032 (0.813)
CSM3637 2 to 200 0.360 (9.14) 0.370 (9.4) 0.025 (0.635) 0.086 (2.18) 0.061 (1.55) 0.032 (0.813)
LAND PATTERN DIMENSIONS - TOLERANCES ± 0.003 (± 0.076)
MODELabcde I
CSM2512 0.125 (3.18) 0.130 (3.30) 0.030 (0.76) 0.020 (0.51) 0.055 (1.40) 0.065 (1.65)
CSM3637 0.116 (2.95) 0.366 (9.30) 0.066 (1.68) 0.244 (0.61) - 0.178 (4.52)
TABLE 2 - ORDERING INFORMATION
MODEL RESISTANCE VALUE LETTER DESIGNATOR* TOLERANCE TERMINATION PACKAGING
CSM2512 3 mΩ - 200 mΩ
R
B = ± 0.1 %
C = ± 0.25 %
D = ± 0.5 %
F = ± 1.0 %
S = Lead (Pb)-free
B = Tin/Lead
W = Waffle Pack
T =Tape and Reel
CSM3637 2 mΩ - 200 mΩ
H
A
W
B
T
L
e
I
a
d
c
bI
a
d
c
b
H
A
W
B
T
L
CSM3637 DIMENSIONS
CSM2512 DIMENSIONS #
#
CSM2512 LAND PATTERN CSM3637 LAND PATTERN
E1
E2
I1
I2
E1
E2
I1
I2
Kelvin Connection
I1, I2 - Current
E1, E2 - Sense
THROUGH HOLE
Legal Disclaimer Notice
Vishay
Document Number: 91000 www.vishay.com
Revision: 08-Apr-05 1
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.
