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 W and TCR to 0 ± 15 ppm/°C
FEATURES
•
Temperature coefficient: ± 15 ppm/°C max.
(- 55 °C to + 125 °C, + 25 °C ref.) (see table 1)
•
Power rating: 1 to 3 W
•
Tolerance: ± 0.1 %
•
Resistance range: 2 mΩ to 200 mΩ
•
Vishay Foil resistors are not restricted to standard values,
we can supply specific “as required” values at no extra cost
or delivery (e.g. 2.3456 mΩ vs. 2 mΩ)
•
Short time overload: ± 0.1 % typical
•
Thermal EMF: 3 µV/°C
•
Maximum current: up to 38 A
•
Surface mount configuration
•
Four terminal (Kelvin) design: allows for precision accurate
measurements
•
Terminal finish: lead (Pb)-free, tin/lead alloy
•
Prototype samples available from 72 h. For more
information, please contact foil@vishay.com
•
For better performance please contact us
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
I
1
E
1
E
2
I
2
V
I
R
I
TABLE 1 - SPECIFICATIONS
PARAMETER
Resistance Range
3 mΩ to 200 mΩ
1W
18 A
± 0.1 %
Power Rating at 70 °C
Maximum Current
Tightest Tolerance
Temperature Coefficient Max.
(- 55 °C to + 125 °C, + 25 °C Ref.)
Operating Temperature Range
Weight (maximum)
* Pb containing terminations are not RoHS compliant, exemptions may apply
Document Number: 63089
Revision: 13-Jan-09
For any questions, contact: foil@vishay.com
www.vishay.com
1
PR
O
DU
CT
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 to 200 mΩ
3 W ( 2 mΩ to 10 mΩ)
2 W (> 10 mΩ to 200 mΩ)
38 A
± 15 ppm/°C
± 25 ppm/°C (2 mΩ to < 3 mΩ)
± 15 ppm/°C (3 mΩ to 200 mΩ)
- 55 °C to + 125 °C, ref. + 25 °C
0.29 g
0.09 g
CSM
Vishay Foil Resistors
FIGURE 2 - DIMENSIONS AND IMPRINTING
in inches (millimeters)
CSM2512 DIMENSIONS
(1)
CSM3637 DIMENSIONS
(1)
H
B
L
T
W
A
CSM2512 LAND PATTERN
I
1
e
E
1
E
2
I
2
I
d
b
c
Kelvin Connection
I
1
, I
2
- Current
E
1
, E
2
- Sense
a
DIMENSIONS - TOLERANCES ± 0.010 (± 0.254), * ± 0.015 (± 0.381)
IM
PR
O
VE
D
MODEL
RESISTANCE RANGE (mΩ)
3 to < 5
L
W
CSM2512
5 to < 7
0.250 (6.350)
0.125 (3.175)
7 to 200
CSM3637
2 to 200
0.360 (9.144)
0.370 (9.398)
LAND PATTERN DIMENSIONS - TOLERANCES ± 0.003 (± 0.076)
MODEL
RANGE
a
b
c
d
0.021 (0.53)
0.021 (0.53)
0.021 (0.53)
0.031 (0.78)
e
0.055 (1.39)
0.055 (1.39)
0.055 (1.39)
-
I
0.050 (1.27)
0.125 (3.17)
0.160 (4.06)
0.186 (4.72)
0R001 to 0R0049
0R005 to 0R0069
0R007 to 0R5
0.120 (3.04)
0.083 (2.10)
0.065 (1.65)
0.145 (3.68)
0.145 (3.68)
0.045 (1.14)
0.045 (1.14)
CSM2512
0.145 (3.68)
CSM3637
0R002 to 0R2
0.130 (3.30)
0.364 (9.24)
Note
(1)
White dot indicates top side of part for mounting purposes.
www.vishay.com
2
For any questions, contact: foil@vishay.com
PR
O
DU
CT
H
A
B
L
W
T
CSM3637 LAND PATTERN
E
1
I
1
E
2
c
I
2
I
d
b
a
H
T
0.083 (2.108)
A
B
0.025 (0.635)
0.047 (1.194)
0.032 (0.813)
0.030 (0.762)* 0.032 (0.813)*
0.025 (0.635)
0.086 (2.184)
0.061 (1.549)
0.032 (0.813)
0.045 (1.14)
0.052 (1.32)
Document Number: 63089
Revision: 13-Jan-09
CSM
Vishay Foil Resistors
TABLE 2 - GLOBAL PART NUMBER INFORMATION
NEW GLOBAL PART NUMBER: Y14870R12400B0R (preferred part number format)
DENOTES PRECISION
Y
VALUE
R
=
Ω
CHARACTERISTICS
(1)
0
= standard
9
= lead (Pb)-free
1 to 999
= custom
Y
1
4
8
7
0
R
PRODUCT CODE
1487
= CSM2512
1488
= CSM3637
RESISTANCE TOLERANCE
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
FOR EXAMPLE: ABOVE GLOBAL ORDER Y1487 0R12400 B 0 R:
TYPE: CSM2512
VALUE: 124.0 mΩ
ABSOLUTE TOLERANCE: ± 0.1 %
TERMINATION: standard tin/lead
PACKAGING: tape and reel
HISTORICAL PART NUMBER: CSM2512 0R1240 B B T (will continue to be used)
CSM2512
MODEL
0R1240
OHMIC VALUE
0.124
Ω
B
ABS. TOLERANCE
B
= ± 0.1 %
C
= ± 0.25 %
D
= ± 0.5 %
F
= ± 1.0 %
IM
PR
O
VE
D
Note
(1)
For non-standard requests, please contact application engineering.
Document Number: 63089
Revision: 13-Jan-09
For any questions, contact: foil@vishay.com
PR
O
DU
CT
1
2
4
0
0
B
0
R
PACKAGING
W
= waffle
R
= tape and reel
B
T
TERMINATION
PACKAGING
S
= lead (Pb)-free
B
= tin/lead
T
= tape and reel
W
= waffle pack
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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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