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Please confirm tec h nic al sp ec ifi ca tions bef ore you ord er an d/o r use.
CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, I nc.
Resistive Product Solutions
CSS0603(*) 0.33 8.1 16.2 ± 50 ppm/ºC
CSS0805(*) 0.5 12.9 25.8 ± 50 ppm/ºC
±50 ppm/ºC -0.001 -0.004
±25 ppm/ºC 0.007 -0.015 0.005 -0.015
±15 ppm/ºC 0.016 -0.05 0.016 -0.05
±50 ppm/ºC -0.001 -0.003
±25 ppm/ºC -0.004 -0.006
±15 ppm/ºC 0.007 -0.1 0.007 -0.1
±50 ppm/ºC -0.0005 -0.003
±25 ppm/ºC -0.004 -0.006
±15 ppm/ºC 0.007 -0.075 0.007 -0.075
±50 ppm/ºC -0.0005 -0.0025
±25 ppm/ºC 0.007 -0.01 0.003 -0.01
CSS2725(*) 4126.49 252.95 ± 50 ppm/ºC -0.00025 -0.003
±25 ppm/ºC 0.004 -0.007 0.004 -0.007
±15 ppm/ºC 0.008 -0.1 0.008 -0.1
±25 ppm/ºC 0.004 -0.007 0.004 -0.007
±15 ppm/ºC 0.008 -0.05 0.008 -0.05
CSS4527(*) 5100 173 ±50 ppm/ºC 0.007 -0.12 0.0005 -0.12
(* ) Q ualified to AEC-Q 200
31.62
63.25
CSSH2728
4
2
3
CSS2728(*)
CSS2512(*)
CSSH2512(*)
63.25
1
3
27.39
134.16
63.25
63.25
31.62
31.62
47.43
141.42
77.46
CSS2010(*)
Ohmic Range (Ω) and Tolerance
1%, 2% , 5%
Maximum Overload
Current (A)
TCR ( p p m/ º C)
Type / Code
Maximum Pow er
Rating ( W at t s)
M a ximum Rating
Current (A)
CSS1206(*)
1
0.005, 0. 01, 0. 015
0.005, 0. 01, 0. 015
Features:
Please refer to the High Power Resist or Applicat ion Note (page 5) for more information on designing and
implementing high power resistor types.
• High power metal alloy current sense resistor
• Very low inductance (0.5nH to 5nH)
• 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
resistanc e values
• All the CSS package sizes and the CSSH2512 package size
are qualified to AEC-Q200
• RoHS compliant / lead-free
Electrical Specifica tions
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, I nc.
Resistive Product Solutions
0.063 ±0.008 0.031 ±0.008 0.012 ±0.004 0.012 ±0.006 0.012 ±0.006
inches
1.60 ±0.20 0.80 ±0.20 0.30 ±0.10 0.30 ±0.15 0.30 ±0.15 mm
0.080 ±0.008 0.050 ±0.008 0.012 ±0.004 0.014 ±0.008 0.014 ±0.008
inches
2.03 ±0.20 1.27 ±0.20 0.30 ±0.10 0.35 ±0.20 0.35 ±0.20 mm
0.126 ±0.010 0.063 ±0.010 0.025 ±0.010 0.020 ±0.010 0.020 ±0.010
inches
3.20 ±0.25 1.60 ±0.25 0.65 ±0.25 0.51 ±0.25 0.51 ±0.25 mm
0.200 ±0.010 0.100 ±0.010 0.031 ±0.010 0.051 ±0.010 0.051 ±0.010
inches
5.08 ±0.25 2.54 ±0.25 0.79 ±0.25 1.30 ±0.25 1.30 ±0.25 mm
0.200 ±0.010 0.100 ±0.010 0.025 ±0.010 0.031 ±0.010 0.031 ±0.010
inches
5.08 ±0.25 2.54 ±0.25 0.65 ±0.25 0.79 ±0.25 0.79 ±0.25 mm
0.246 ±0.010 0.130 ±0.010 0.031 ±0.010 0.074 ±0.010 0.074 ±0.010
inches
6.25 ±0.25 3.30 ±0.25 0.79 ±0.25 1.88 ±0.25 1.88 ±0.25 mm
0.246 ±0.010 0.130 ±0.010 0.025 ±0.010 0.044 ±0.010 0.044 ±0.010
inches
6.25 ±0.25 3.30 ±0.25 0.65 ±0.25 1.12 ±0.25 1.12 ±0.25 mm
0.246 ±0.010 0.130 ±0.010 0.031 ±0.010 0.074 ±0.010 0.074 ±0.010
inches
6.25 ±0.25 3.30 ±0.25 0.79 ±0.25 1.88 ±0.25 1.88 ±0.25 mm
0.0006 - 0.0029 0.246 ±0.010 0.130 ±0.010 0.031 ±0.010 0.044 ±0.010 0.044 ±0.010 inches
0.0041 - 0.01 6.25 ±0.25 3.30 ±0.25 0.79 ±0.25 1.12 ±0.25 1.12 ±0.25 mm
0.246 ±0.010 0.130 ±0.010 0.031 ±0.010 0.066 ±0.010 0.066 ±0.010
inches
6.25 ±0.25 3.30 ±0.25 0.79 ±0.25 1.68 ±0.25 1.68 ±0.25 mm
0.268 ±0.010 0.254 ±0.010 0.039 ±0.010 0.085 ±0.010 0.085 ±0.010
inches
6.81 ±0.25 6.45 ±0.25 0.99 ±0.25 2.16 ±0.25 2.16 ±0.25 mm
0.268 ±0.010 0.254 ±0.010 0.043 ±0.010 0.085 ±0.010 0.085 ±0.010
inches
6.81 ±0.25 6.45 ±0.25 1.09 ±0.25 2.16 ±0.25 2.16 ±0.25 mm
0.268 ±0.010 0.254 ±0.010 0.039 ±0.010 0.085 ±0.010 0.085 ±0.010
inches
6.81 ±0.25 6.45 ±0.25 0.99 ±0.25 2.16 ±0.25 2.16 ±0.25 mm
0.268 ±0.010 0.254 ±0.010 0.035 ±0.010 0.071 ±0.010 0.071 ±0.010
inches
6.81 ±0.25 6.45 ±0.25 0.89 ±0.25 1.80 ±0.25 1.80 ±0.25 mm
0.268 ±0.010 0.254 ±0.010 0.035 ±0.010 0.065 ±0.010 0.065 ±0.010
inches
6.81 ±0.25 6.45 ±0.25 0.89 ±0.25 1.65 ±0.25 1.65 ±0.25 mm
0.268 ±0.010 0.254 ±0.010 0.035 ±0.010 0.051 ±0.010 0.051 ±0.010
inches
6.81 ±0.25 6.45 ±0.25 0.89 ±0.25 1.30 ±0.25 1.30 ±0.25 mm
0.264 ±0.010 0.283 ±0.010 0.039 ±0.010 0.045 ±0.010 0.045 ±0.010
inches
6.71 ±0.25 7.19 ±0.25 0.99 ±0.25 1.14 ±0.25 1.14 ±0.25 mm
0.264 ±0.010 0.283 ±0.010 0.039 ±0.010 0.045 ±0.010 0.045 ±0.010
inches
6.71 ±0.25 7.19 ±0.25 0.99 ±0.25 1.14 ±0.25 1.14 ±0.25 mm
0.450 ±0.010 0.270 ±0.010 0.059 ±0.010 0.038 ±0.010 0.127 ±0.010
inches
11.43 ±0.25 6.85 ±0.25 1.50 ±0.25 0.97 ±0.25 3.22 ±0.25 mm
0.450 ±0.010 0.270 ±0.010 0.059 ±0.010 0.038 ±0.010 0.071 ±0.010
inches
11.43 ±0.25 6.85 ±0.25 1.50 ±0.25 0.97 ±0.25 1.82 ±0.25 mm
CSS2725
CSS2512
0.001 - 0.003
0.004 - 0.1
0.0005 - 0.004
4
3
0.00025, 0. 0005
0.001
0.0015
CSS0603
0.33
0.0005 - 0.005
CSS4527
5
0.0051 - 0.1
CSSH2728
4
0.001 - 0.05
CSS0805
0.5
0.005, 0. 01, 0. 015
0.004 - 0.1
CSS2010
CSS2728
Unit
Type/Code
Maximum Power
Rating ( W at t s )
Resistance Range
(Ω)
b
L
W
a
0.0025
0.003
0.0041 - 0.075
2
0.0005
0.003 - 0.004
3
1
0.0031 - 0.1
H
CSSH2512
0.002
0.005, 0. 01, 0. 015
CSS1206
1
Mechanic al Spec ifications
Rev Date: 10/01/2015 3 www.seielect.com
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, I nc.
Resistive Product Solutions
Solder Pad Dimensions
0.039 0.050 0.020
inches
1.00 1.27 0.50 mm
0.071 0.086 0.026
inches
1.80 2.18 0.66 mm
0.063 0.086 0.039
inches
1.60 2.18 1.00 mm
0.114 0.115 0.048
inches
2.89 2.92 1.22 mm
0.090 0.115 0.095
inches
2.29 2.92 2.41 mm
0.120 0.145 0.050
inches
3.05 3.68 1.27 mm
0.083 0.145 0.125
inches
2.11 3.68 3.18 mm
0.120 0.145 0.050
inches
3.05 3.68 1.27 mm
0.0006 - 0.0029 0.086 0.145 0.118 inches
0.0041 - 0.01 2.19 3.68 3.00 mm
0.110 0.145 0.071
inches
2.79 3.68 1.80 mm
0.125 0.270 0.052
inches
3.18 6.86 1.32 mm
0.108 0.308 0.138
inches
2.75 7.82 3.51 mm
0.108 0.308 0.138
inches
2.75 7.82 3.51 mm
0.189 0.344 0.217
inches
4.80 8.74 5.51 mm
0.134 0.344 0.327
inches
3.40 8.74 8.31 mm
CSS4527
5
0.0005 - 0.005
0.0051 - 0.12
0.003 - 0.004
CSS2728
3
0.004 - 0.1
CSSH2728
4
0.004 - 0.1
CSS2512
2
0.0005 - 0.004
0.0041 - 0.075
0.00025 - 0.003
CSS2725
4
CSSH2512
3
0.0005
CSS0603
0.33
0.005, 0. 01, 0.015
CSS2010
1
0.001 - 0.003
0.0031 - 0.1
CSS1206
1
0.001 - 0.05
CSS0805
0.5
0.005, 0. 01, 0.015
Type/Code
Maximum Pow er
Rating ( W at t s)
Resistance Range (Ω)
a
b
i
Unit
Rev Date: 10/01/2015 4 www.seielect.com
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, I nc.
Resistive Product Solutions
12345678910 11 12 13
C S S 2 7 2 5 F T 3 L 0 0
0
225
All other s izes
CSS0603, CSS0805
Power Load (%)
100
-55ºC
80
60
40
20
70°C 100°C
-60
0
50
100
150
200
250
Ambient Temperature (ºC)
Test Item Condition of Test Test Met hod Tes t Limits
R1: r esist ance of r oom temperat ure (T1)
R2: r esist ance of 150ºC (T2)
The number of r ated power ar e as f ollows:
(∆R/R1) ≤ ±2%
Insul ation R esi stance 100±15V DC f or 1 minut e JI S C 5201-1 4. 6 ≥109Ω
Oper ating Temper at ur e Range f or all other sizes: - 55°C t o + 225°C. Cont ac t f actor y f or oper at ion at higher temperat ures.
TCR ( p p m/ º C)
Per specif icat ion
(r efer t o Elect r ical
Specification table)
JI S C 5201-1 4. 8
Temper at ur e Coeff icient of Resist ance
(TCR)
JI S C 5201-1 4. 13
Oper ating Temper at ur e Range f or s izes 0603 and 0805: - 55°C to + 150°C. Cont ac t f ac t or y f or oper ation at higher t emperat ur es.
Applied 500V AC f or 1 minute and
limit surge cur r ent 50mA ( max)
Dielectr ic W ithstanding Voltage
JI S C 5201-1 4. 7
Without br eak dow n
(∆R/R1) ≤ ±0.5%
Shor t Time Over load
(r ating power dur at ion = 5 s econds)
CSS0603-0.33W : 4 t imes rat ed pow er
CSS0805-0.5W : 4 t imes rat ed pow er
CSS1206-1W : 4 t imes rat ed power
CSS2010-1W : 4 t imes rat ed power
CSS2512-2W : 5 t imes rat ed power
CSSH2512- 3W: 3 t imes rat ed power
CSS2725-4W : 4 t imes rat ed power
CSS2728-3W : 3 t imes rat ed power
CSSH2728- 4W: 4 t imes rat ed power
CSS4527-5W : 3 t imes rat ed power
Size
CSS 0603 Code Tol Code Quantity
CSSH 0805 D0.5% 5,000
1206 F1% 4,000
2010 G2%
2512 J5%
(H)2512
2725
2728
500
(H)2728
4527
Packaging
0.05 ohm = 50L0
Power
Tolerance
Description
Size
Resistance Value
Product Ser ies
1W
2010, 2512
2W
(H)2512
3W
0.00025 ohm = L250
M etal Allo y
5W
2,000
1,000
2725, 2728
Four c har act er s wit h
the mult iplier us ed as
the decimal holder.
"L" used as multiplier
of 10
-3
for any value
under 0. 1 ohm.
0.33W
0.5W
0603, 0805
T
7" Reel - Plast ic Tape
0.12 ohm = R120
0.004 ohm = 4L00
3W
4527
4W
High Power
4W
(H)2728
1W
1206
Power Derating Curve:
Performance Characteristics
How to Order
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CSS/CSSH Series
Ultra Precision Current Sensing Chip Resistor
Stackpole Electronics, I nc.
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 degrees C for the CSS / CSSH series and 70
degrees 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 105C.
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 degrees C heat rise shown here would indicate t here will be additional thermal reduction techniques
needed to keep this part under 105C 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
degrees 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, vias thr ough 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 f inal resistance value can be af fected b y the boar d layout and as sem bly pr ocess , especiall y the size of the
mounting pads and the amount of solder used. This is especially notable for resistance values ≤ 50 mΩ.
This should be taken into account when designing.