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
Excellent frequency response
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
CSS0603
CSS0805
CSS1206
Maximum Power
Rating (Watts)
0.33
0.5
1
Maximum Rating
Current (A)
8.1
12.9
31.62
Maximum Overload
Current (A)
16.2
25.8
63.25
TCR (ppm/ºC)
±50 ppm/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 - 0.1
0.004 - 0.007
0.008 - 0.019
0.007 - 0.12
1%, 2%, 5%
0.005, 0.01, 0.015
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
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
47.43
70.71
173
Please refer to the High Power Resistor Application Note (page 4) for more information on designing and
implementing high power resistor types.
Rev Date: 11/13/2017
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
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
L
0.063 ± 0.008
1.60 ± 0.20
0.080 ± 0.008
2.03 ± 0.20
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 ± 0.010
6.25 ± 0.25
0.246 ± 0.010
6.25 ± 0.25
0.246 ± 0.010
6.25 ± 0.25
0.246 ± 0.010
6.25 ± 0.25
0.268 ± 0.010
6.81 ± 0.25
0.268 ± 0.010
6.81 ± 0.25
0.268 ± 0.010
6.81 ± 0.25
0.268 ± 0.010
6.81 ± 0.25
0.268 ± 0.010
6.81 ± 0.25
0.268 ± 0.010
6.81 ± 0.25
0.264 ± 0.010
6.71 ± 0.25
0.264 ± 0.010
6.71 ± 0.25
0.450
11.43
0.450
11.43
±
±
±
±
0.010
0.25
0.010
0.25
W
0.031 ± 0.008
0.80 ± 0.20
0.050 ± 0.008
1.27 ± 0.20
0.063 ± 0.010
1.60 ± 0.25
0.100 ± 0.010
2.54 ± 0.25
0.100 ± 0.010
2.54 ± 0.25
0.130 ± 0.010
3.30 ± 0.25
0.130 ± 0.010
3.30 ± 0.25
0.130 ± 0.010
3.30 ± 0.25
0.130 ± 0.010
3.30 ± 0.25
0.130 ± 0.010
3.30 ± 0.25
0.254 ± 0.010
6.45 ± 0.25
0.254 ± 0.010
6.45 ± 0.25
0.254 ± 0.010
6.45 ± 0.25
0.254 ± 0.010
6.45 ± 0.25
0.254 ± 0.010
6.45 ± 0.25
0.254 ± 0.010
6.45 ± 0.25
0.283 ± 0.010
7.19 ± 0.25
0.283 ± 0.010
7.19 ± 0.25
0.270
6.85
0.270
6.85
±
±
±
±
0.010
0.25
0.010
0.25
H
0.012 ± 0.004
0.30 ± 0.10
0.012 ± 0.004
0.30 ± 0.10
0.025 ± 0.010
0.65 ± 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 ± 0.010
0.65 ± 0.25
0.031 ± 0.010
0.79 ± 0.25
0.031 ± 0.010
0.79 ± 0.25
0.031 ± 0.010
0.79 ± 0.25
0.039 ± 0.010
0.99 ± 0.25
0.043 ± 0.010
1.09 ± 0.25
0.039 ± 0.010
0.99 ± 0.25
0.035 ± 0.010
0.89 ± 0.25
0.035 ± 0.010
0.89 ± 0.25
0.035 ± 0.010
0.89 ± 0.25
0.039 ± 0.010
0.99 ± 0.25
0.039 ± 0.010
0.99 ± 0.25
0.059
1.50
0.059
1.50
±
±
±
±
0.010
0.25
0.010
0.25
a
0.012 ± 0.006
0.30 ± 0.15
0.014 ± 0.008
0.35 ± 0.20
0.020 ± 0.010
0.51 ± 0.25
0.051 ± 0.010
1.30 ± 0.25
0.031 ± 0.010
0.79 ± 0.25
0.074 ± 0.010
1.88 ± 0.25
0.044 ± 0.010
1.12 ± 0.25
0.074 ± 0.010
1.88 ± 0.25
0.044 ± 0.010
1.12 ± 0.25
0.066 ± 0.010
1.68 ± 0.25
0.085 ± 0.010
2.16 ± 0.25
0.085 ± 0.010
2.16 ± 0.25
0.085 ± 0.010
2.16 ± 0.25
0.071 ± 0.010
1.80 ± 0.25
0.065 ± 0.010
1.65 ± 0.25
0.051 ± 0.010
1.30 ± 0.25
0.045 ± 0.010
1.14 ± 0.25
0.045 ± 0.010
1.14 ± 0.25
0.038
0.97
0.038
0.97
±
±
±
±
0.010
0.25
0.010
0.25
b
0.012 ± 0.006
0.30 ± 0.15
0.014 ± 0.008
0.35 ± 0.20
0.020 ± 0.010
0.51 ± 0.25
0.051 ± 0.010
1.30 ± 0.25
0.031 ± 0.010
0.79 ± 0.25
0.074 ± 0.010
1.88 ± 0.25
0.044 ± 0.010
1.12 ± 0.25
0.074 ± 0.010
1.88 ± 0.25
0.044 ± 0.010
1.12 ± 0.25
0.066 ± 0.010
1.68 ± 0.25
0.085 ± 0.010
2.16 ± 0.25
0.085 ± 0.010
2.16 ± 0.25
0.085 ± 0.010
2.16 ± 0.25
0.071 ± 0.010
1.80 ± 0.25
0.065 ± 0.010
1.65 ± 0.25
0.051 ± 0.010
1.30 ± 0.25
0.045 ± 0.010
1.14 ± 0.25
0.045 ± 0.010
1.14 ± 0.25
0.127
3.22
0.071
1.82
±
±
±
±
0.010
0.25
0.010
0.25
Unit
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
inches
mm
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
0.00025, 0.0005
0.001
0.0015
CSS2725
4
0.002
0.0025
0.003
CSS2728
CSSH2728
3
4
0.004 - 0.1
0.004 - 0.1
0.0005 - 0.005
CSS4527
5
0.0051 - 0.1
Rev Date: 11/13/2017
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 Layout
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
0.125
3.18
0.108
2.75
0.108
2.75
0.189
4.80
0.134
3.40
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
0.270
6.86
0.308
7.82
0.308
7.82
0.344
8.74
0.344
8.74
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
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
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
CSS2725
CSS2728
CSSH2728
4
3
4
0.00025 - 0.003
0.004 - 0.1
0.004 - 0.1
0.0005 - 0.005
CSS4527
5
0.0051 - 0.12
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)
Rev Date: 11/13/2017
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
Performance Characteristics
Test
Test Method
Test Specifications
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
100±15V DC for 1 minute
≥10 Ω
Applied 500V AC for 1 minute and
JIS-C-5201-1 4.7
Dielectric Withstanding Voltage
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
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.
Rev Date: 11/13/2017
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
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.
RoHS Compliance
Stackpole Electronics has joined the worldwide effort to reduce the amount of lead in electronic components and to
meet the various regulatory requirements now prevalent, such as the European Union’s directive regarding “Restrictions
on Hazardous Substances” (RoHS 2). As part of this ongoing program, we periodically update this document with the
status regarding the availability of our compliant components. All our standard part numbers are compliant to EU
Directive 2011/65/EU of the European Parliament.
RoHS Compliance Status
Standard
Product
Series
Description
Package /
Termination
Type
Standard
Series
RoHS
Compliant
YES
Lead-Free Termination
Composition
Lead-Free
Mfg. Effective Date
(Std Product Series)
Lead-Free
Effective Date
Code
(YY/WW)
Always
CSS
Ultra Precision Current Sensing
Chip Resistor
Ultra Precision Current Sensing
Chip Resistor (High Power)
SMD
100% Matte Sn over Ni
Always
CSSH
SMD
YES
100% Matte Sn over Ni
Always
Always
“Conflict Metals” Commitment
We at Stackpole Electronics, Inc. are joined with our industry in opposing the use of metals mined in the “conflict region”
of the Eastern Democratic Republic of the Congo (DRC) in our products. Recognizing that the supply chain for metals
used in the electronics industry is very complex, we work closely with our own suppliers to verify to the extent possible
that the materials and products we supply do not contain metals sourced from this conflict region. As such, we are in
compliance with the requirements of Dodd-Frank Act regarding Conflict Minerals.
Compliance to “REACH”
We certify that all passive components supplied by Stackpole Electronics, Inc. are SVHC (Substances of Very High
Concern) free and compliant with the requirements of EU Directive 1907/2006/EC, “The Registration, Evaluation,
Authorization and Restriction of Chemicals”, otherwise referred to as REACH. Contact us for complete list of REACH
Substance Candidate List.
Rev Date: 11/13/2017
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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stm32/stm8
