CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Features:
•
•
•
•
•
•
High power metal alloy current sense resistor
High temperature performance up to 225°C;
for operation up to 275ºC, contact factory
Low thermal EMF (<1µV/C)
Proprietary processing technique produces extremely low
resistance values
Qualified to AEC-Q200
RoHS compliant, lead-free and halogen-free
Electrical Specifications
Type/Code
Maximum Power
Rating (Watts)
0.33
0.5
Maximum Rating
Current (A)
9.08
8.1
12.9
12.9
31.62
Maximum Overload
Current (A)
18.16
16.2
25.8
25.8
63.25
TCR (ppm/ºC)
±75ppm/ºC
±50 ppm/ºC
±75ppm/ºC
±50 ppm/ºC
±50 ppm/ºC
±25 ppm/ºC
±15 ppm/ºC
±50 ppm/ºC
±25 ppm/ºC
±15 ppm/ºC
±50 ppm/ºC
±25 ppm/ºC
±15 ppm/ºC
±50 ppm/ºC
±25 ppm/ºC
±50 ppm/ºC
±25 ppm/ºC
±15 ppm/ºC
±25 ppm/ºC
±15 ppm/ºC
±50 ppm/ºC
Ohmic Range (Ω) and Tolerance
0.5%
-
-
-
-
-
0.007 - 0.015
0.016 - 0.05
-
-
0.007 - 0.1
-
-
0.007 - 0.075
-
0.007 - 0.01
-
0.004 - 0.007
0.008 - 0.19
0.004 - 0.007
0.008 - 0.019
0.007 - 0.12
1%, 2%, 5%
0.004
0.005, 0.01, 0.015
0.003
0.005, 0.01, 0.015
0.001 - 0.004
0.005 - 0.015
0.016 - 0.05
0.001 - 0.003
0.004 - 0.006
0.007 - 0.1
0.0005 - 0.003
0.004 - 0.006
0.007 - 0.075
0.0005 - 0.0025
0.003 - 0.01
0.00025 - 0.003
0.004 - 0.007
0.008 - 0.1
0.004 - 0.007
0.008 - 0.05
0.0005 - 0.12
CSS0603
CSS0805
CSS1206
1
CSS2010
1
31.62
63.25
CSS2512
2
63.25
141.42
CSSH2512
CSS2725
CSS2728
CSSH2728
CSS4527
3
4
3
4
5
77.46
126.49
27.39
31.62
100
134.16
252.95
61.24A
70.71
173
Please refer to the High Power Resistor Application Note (page 5) for more information on designing and implementing
high power resistor types.
Mechanical Specifications
Type/Code
CSS0603
Maximum Power
Rating (Watts)
0.33
Resistance Range
(Ω)
0.004, 0.005
0.01, 0.015
L
0.063 ± 0.008
1.60 ± 0.20
W
0.031 ± 0.008
0.80 ± 0.20
H
0.010 ± 0.004
0.25 ± 0.10
T1
Unit
Bottom Termination
inches
0.012 ± 0.006
0.30 ± 0.15
mm
Rev Date: 08/22/2018
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
1
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Mechanical Specifications (cont.)
Type/Code
CSS0805
Maximum Power
Rating (Watts)
0.5
Resistance Range
(Ω)
0.003, 0.005
0.01, 0.015
L
0.080 ± 0.008
2.03 ± 0.20
W
0.050 ± 0.008
1.27 ± 0.20
H
0.012 ± 0.004
0.30 ± 0.10
T1
Bottom Termination
0.014 ± 0.008
0.35 ± 0.20
T2
Top Termination
0.008 ± 0.006
0.20 ± 0.15
Unit
inches
mm
Type/Code
CSS1206
CSS1206
Maximum Power
Rating (Watts)
Resistance Range
(Ω)
0.001
0.002 - 0.004
L
0.126 ± 0.010
3.20 ± 0.25
0.126 ± 0.010
3.20 ± 0.25
0.126 ± 0.010
3.20 ± 0.25
0.126 ± 0.010
3.20 ± 0.25
0.200 ± 0.010
5.08 ± 0.25
0.200 ± 0.010
5.08 ± 0.25
0.246 ± 0.010
6.25 ± 0.25
0.246
6.25
0.246
6.25
0.246
6.25
0.246
6.25
0.246
6.25
0.246
6.25
0.268
6.81
0.268
6.81
0.268
6.81
0.268
6.81
0.268
6.81
0.268
6.81
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
W
0.063 ± 0.010
1.60 ± 0.25
0.063 ± 0.010
1.60 ± 0.25
0.063 ± 0.010
1.60 ± 0.25
0.063 ± 0.010
1.60 ± 0.25
0.100 ± 0.010
2.54 ± 0.25
0.100 ± 0.010
2.54 ± 0.25
0.126 ± 0.010
3.20 ± 0.25
0.126
3.20
0.126
3.20
0.126
3.20
0.126
3.20
0.126
3.20
0.126
3.20
0.254
6.45
0.254
6.45
0.254
6.45
0.254
6.45
0.254
6.45
0.254
6.45
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
H
0.025 ± 0.010
0.65 ± 0.25
0.022 ± 0.010
0.55 ± 0.25
0.022 ± 0.010
0.55 ± 0.25
0.022 ± 0.010
0.55 ± 0.25
0.031 ± 0.010
0.79 ± 0.25
0.025 ± 0.010
0.65 ± 0.25
0.031 ± 0.010
0.79 ± 0.25
0.025
0.65
0.031
0.79
0.031
0.79
0.031
0.79
0.031
0.79
0.026
0.65
0.039
0.99
0.043
1.09
0.039
0.99
0.035
0.89
0.035
0.89
0.035
0.89
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
±
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
0.010
0.25
1
CSS1206
CSS1206
0.005
0.006 - 0.05
0.001 - 0.003
CSS2010
1
0.0031 - 0.1
0.0005 - 0.004
CSS2512
2
0.0041 - 0.075
0.0005
0.0006 - 0.0029
CSSH2512
3
0.003
0.0031 - 0.004
0.0041 - 0.01
0.00025, 0.0005
0.001
0.0015
CSS2725
4
0.002
0.0025
0.003
T1
T2
Unit
Bottom Termination Top Termination
0.020 ± 0.010
0.020 ± 0.010 inches
0.51 ± 0.25
0.51 ± 0.25
mm
0.020 ± 0.010
0.020 ± 0.010 inches
0.51 ± 0.25
0.51 ± 0.25
mm
0.024 ± 0.010
0.024 ± 0.010 inches
0.60 ± 0.25
0.60 ± 0.25
mm
0.020 ± 0.010
0.020 ± 0.010 inches
0.51 ± 0.25
0.51 ± 0.25
mm
0.051 ± 0.010
0.051 ± 0.010 inches
1.30 ± 0.25
1.30 ± 0.25
mm
inches
0.031 ± 0.010
0.031 ± 0.010
0.79 ± 0.25
0.79 ± 0.25
mm
0.074 ± 0.010
0.074 ± 0.010 inches
1.88 ± 0.25
1.88 ± 0.25
mm
0.044 ± 0.010
0.044 ± 0.010 inches
1.12 ± 0.25
1.12 ± 0.25
mm
0.074 ± 0.010
0.074 ± 0.010 inches
1.88 ± 0.25
1.88 ± 0.25
mm
0.044 ± 0.010
0.044 ± 0.010 inches
1.12 ± 0.25
1.12 ± 0.25
mm
0.074 ± 0.010
0.074 ± 0.010 inches
1.88 ± 0.25
1.88 ± 0.25
mm
0.066 ± 0.010
0.066 ± 0.010 inches
1.68 ± 0.25
1.68 ± 0.25
mm
0.044 ± 0.010
0.044 ± 0.010 inches
1.12 ± 0.25
1.12 ± 0.25
mm
0.085 ± 0.010
0.085 ± 0.010 inches
2.16 ± 0.25
2.16 ± 0.25
mm
0.085 ± 0.010
0.085 ± 0.010 inches
2.16 ± 0.25
2.16 ± 0.25
mm
0.085 ± 0.010
0.085 ± 0.010 inches
2.16 ± 0.25
2.16 ± 0.25
mm
0.071 ± 0.010
0.071 ± 0.010 inches
1.80 ± 0.25
1.80 ± 0.25
mm
0.065 ± 0.010
0.065 ± 0.010 inches
1.65 ± 0.25
1.65 ± 0.25
mm
0.051 ± 0.010
0.051 ± 0.010 inches
1.30 ± 0.25
1.30 ± 0.25
mm
Rev Date: 08/22/2018
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Mechanical Specifications (cont.)
Type/Code
CSS2728
CSSH2728
Maximum Power
Rating (Watts)
3
4
Resistance Range
(Ω)
0.004 - 0.1
0.004 - 0.1
0.264
6.71
0.264
6.71
L
±
±
±
±
0.010
0.25
0.010
0.25
0.283
7.19
0.283
7.19
W
±
±
±
±
0.010
0.25
0.010
0.25
0.039
0.99
0.039
0.99
H
±
±
±
±
0.010
0.25
0.010
0.25
T1
T2
Unit
Bottom Termination Top Termination
0.045 ± 0.010
0.045 ± 0.010 inches
1.14 ± 0.25
1.14 ± 0.25
mm
0.045 ± 0.010
0.045 ± 0.010 inches
1.14 ± 0.25
1.14 ± 0.25
mm
Type/Code
Maximum Power
Rating (Watts)
5
Resistance Range
(Ω)
0.0005 - 0.005
0.450
11.43
0.450
11.43
L
±
±
±
±
0.010
0.25
0.010
0.25
0.270
6.85
0.270
6.85
W
±
±
±
±
0.010
0.25
0.010
0.25
0.059
1.50
0.059
1.50
H
±
±
±
±
0.010
0.25
0.010
0.25
CSS4527
0.0051 - 0.1
T1
Bottom Termination
0.127 ± 0.010
3.22 ± 0.25
0.071 ± 0.010
1.82 ± 0.25
T2
Top Termination
0.038 ± 0.010
0.97 ± 0.25
0.038 ± 0.010
0.97 ± 0.25
Unit
inches
mm
inches
mm
Recommended Pad Layouts
Type/Code
CSS0603
CSS0805
CSS1206
Maximum Power
Rating (Watts)
0.33
0.5
1
Resistance Range (Ω)
0.005, 0.01, 0.015
0.005, 0.01, 0.015
0.001 - 0.05
0.001 - 0.003
a
0.039
1.00
0.071
1.80
0.063
1.60
0.114
2.89
0.090
2.29
0.120
3.05
0.083
2.11
0.120
3.05
0.086
2.19
0.110
2.79
b
0.050
1.27
0.086
2.18
0.086
2.18
0.115
2.92
0.115
2.92
0.145
3.68
0.145
3.68
0.145
3.68
0.145
3.68
0.145
3.68
i
0.020
0.50
0.026
0.66
0.039
1.00
0.048
1.22
0.095
2.41
0.050
1.27
0.125
3.18
0.050
1.27
0.118
3.00
0.071
1.80
Unit
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
CSS2010
1
0.0031 - 0.1
0.0005 - 0.004
CSS2512
2
0.0041 - 0.075
0.0005
CSSH2512
3
0.0006 - 0.0029
0.0041 - 0.01
0.003 - 0.004
Rev Date: 08/22/2018
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
Recommended Pad Layouts
Type/Code
CSS2725
CSS2728
CSSH2728
Maximum Power
Rating (Watts)
4
3
4
Resistance Range (Ω)
0.00025 - 0.003
0.004 - 0.1
0.004 - 0.1
0.0005 - 0.005
CSS4527
5
0.0051 - 0.12
a
0.125
3.18
0.108
2.75
0.108
2.75
0.189
4.80
0.134
3.40
b
0.270
6.86
0.308
7.82
0.308
7.82
0.344
8.74
0.344
8.74
i
0.052
1.32
0.138
3.51
0.138
3.51
0.217
5.51
0.327
8.31
Unit
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
Power Derating Curve:
100
80
-55ºC
70°C 100°C
Power Load (%)
60
40
20
0
-60
225
CSS0603, CSS0805
All other sizes
0
50
100
150
200
250
Ambient Temperature (ºC)
Performance Characteristics
Test
Test Method
Test Specification
TCR (ppm/ºC)
R1: resistance of room temperature (T1)
R2: resistance of 150ºC (T2)
T1: room temperature
T2: temperature at 150°C
The number of rated power are as follows:
CSS0603-0.33W: 4 times rated power
CSS0805-0.5W: 4 times rated power
CSS1206-1W: 4 times rated power
CSS2010-1W: 4 times rated power
(∆R/R1) ≤ ±0.5%
Short Time Overload
JIS-C-5201-1 4.13
CSS2512-2W: 5 times rated power
(rating power duration = 5 seconds)
CSSH2512-3W: 3 times rated power
CSS2725-4W: 4 times rated power
CSS2728-3W: 3 times rated power
CSSH2728-4W: 4 times rated power
(∆R/R1) ≤ ±2%
CSS4527-5W: 3 times rated power
9
Insulation Resistance
JIS-C-5201-1 4.6
≥10 Ω
100±15V DC for 1 minute
Applied 500V AC for 1 minute and
Dielectric Withstanding Voltage
JIS-C-5201-1 4.7
Without break down
limit surge current 50mA (max)
Operating Temperature Range for sizes 0603 and 0805: -55°C to +150°C. Contact factory for operation at higher temperatures.
Operating Temperature Range for all other sizes: -55°C to +225°C. Contact factory for operation at higher temperatures.
JIS-C-5201-1 4.8
Temperature Coefficient of Resistance
(TCR)
Per specification
(refer to Electrical
Specification table)
Test Condition
Rev Date: 08/22/2018
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, Inc.
Resistive Product Solutions
High Power Chip Resistors and Thermal Management
Stackpole has developed several surface mount resistor series in addition to our current sense resistors, which have
had higher power ratings than standard resistor chips. This has caused some uncertainty and even confusion by users
as to how to reliably use these resistors at the higher power ratings in their designs.
The data sheets for the RHC, RMCP, RNCP, CSR, CSRN, CSRF, CSS, and CSSH state that the rated power assumes
an ambient temperature of no more than 100°C for the CSS / CSSH series and 70°C for all other high power resistor
series. In addition, IPC and UL best practices dictate that the combined temperature on any resistor due to power
dissipated and ambient air shall be no more than 105°C. At first glance this wouldn’t seem too difficult, however the
graph below shows typical heat rise for the CSR ½ 100 milliohm at full rated power. The heat rise for the RMCP and
RNCP would be similar. The RHC with its unique materials, design, and processes would have less heat rise and
therefore would be easier to implement for any given customer.
The 102°C heat rise shown here would indicate there will be additional thermal reduction techniques needed to keep
this part under 105°C total hot spot temperature if this part is to be used at 0.75 watts of power. However, this same
part at the usual power rating for this size would have a heat rise of around 72°C. This additional heat rise may be dealt
with using wider conductor traces, larger solder pads and land patterns under the solder mask, heavier copper in the
conductors, via through PCB, air movement, and heat sinks, among many other techniques. Because of the variety of
methods customers can use to lower the effective heat rise of the circuit, resistor manufacturers simply specify power
ratings with the limitations on ambient air temperature and total hot spot temperatures and leave the details of how to
best accomplish this to the design engineers. Design guidelines for products in various market segments can vary
widely so it would be unnecessarily constraining for a resistor manufacturer to recommend the use of any of these
methods over another.
Note:
The final resistance value can be affected by the board layout and assembly process, especially the size of the mounting
pads and the amount of solder used. This is especially notable for resistance values ≤ 50mΩ.
This should be taken into account when designing.
Rev Date: 08/22/2018
This specification may be changed at any time without prior notice
Please confirm technical specifications before you order and/or use.
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