Datasheet

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Features
■ Thick fi lm technology
■ Power rating of 0.25, 0.5 or 1 watt at 70 °C
■ Low resistance values available
■ RoHS compliant*
Applications
■ Current sensing
■ Power supplies
■ Stepper motor drives
■ Snubber resistor for fl yback power supplies
CRM0805/1206/2010 High Power Current Sense Chip Resistors
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specifi c applications.
General Information
Bourns
®
CRM Series are thick fi lm chip
resistors with high power ratings making
them suitable for different applications in
power supply circuits including current
sensing and current limiting.
DIMENSIONS:
MM
(INCHES)
Electrical Characteristics
Characteristic
Model Model Model
CRM0805 CRM1206 CRM2010
Power Rating @ 70 °C 0.25 W 0.5 W 1 W
Operating Temperature Range -55 °C to +155 °C
Derated to Zero Load at +155 °C
Maximum Working Voltage
47 mohms to 910 mohms 551 mV 675 mV 954 mV
1 ohm to 1 megohm 150 V 200 V 200 V
Insulation Resistance >1000 megohms
Resistance Range 47 mohms to 910 mohms (±1 % and ±5 %, E24 Series)
1 ohm to 1 megohm (±1 %, E96 & E24 Series)
0 ohm, 1 ohm to 1 megohm (±5 %, E24 Series)
Resistance Tolerance ±1 %, ±5 %
Temperature Coeffi cient
47 mohms to 91 mohms
(±1 % and ±5 %, E24 Series) ±100 ppm ±100 ppm ±100 ppm
100 mohms to 910 mohms
(±1 % and ±5 %, E24 Series) ±100 ppm ±100 ppm ±100 ppm
1 ohm to 1 megohm
(±1 %, E96 & E24 Series) ±100 ppm
(1)
±100 ppm ±100 ppm
1 ohm to 1 megohm
(±5 %, E24 Series) ±200 ppm ±200 ppm ±200 ppm
Zero Ohm Jumper <0.02 ohm
(2)
Maximum Rated Current 4 A 4 A 6 A
Characteristic Data
Test ΔR Max.
Load Life (1000 hours)
Rated Voltage @ 70 °C
(1.5 hrs. on, 0.5 hrs. off)
1 % Tolerance < 1 %
5 % Tolerance < 3 %
Short Term Overload
(5 X Rated Power for 5 sec.)
1 % Tolerance < 1 %
5 % Tolerance < 2 %
Thermal Shock
(5 Cycles: -55 °C/30 min.;
+25 °C/2-3 min.; +155 °C/
30 min.; +25 °C/2-3 min.)
1 % Tolerance < 0.5 %
5 % Tolerance < 1 %
A
B
SENSING TRACE
Cu TRACE
L
*RoHS COMPLIANT
Product Dimensions
Recommended Solder Pad Layout
Model A B L
CRM0805
1.3 1.15 1.2
(0.051) (0.045) (0.047)
CRM1206
1.8 1.3 2.1
(0.071) (0.051) (0.083)
CRM2010
3.0 1.5 3.8
(0.118) (0.059) (0.149)
Model L W C D T
CRM0805
2.00 ± 0.15 1.20 ± 0.15 0.40 ± 0.20 0.40 ± 0.20 0.50 ± 0.10
(0.079 ± 0.006) (0.047 ± 0.006) (0.016 ± 0.008) (0.016 ± 0.008) (0.020 ± 0.04)
CRM1206
3.10 ± 0.15 1.60 ± 0.15 0.50 ± 0.25 0.50 ± 0.25 0.55 ± 0.10
(0.122 ± 0.006) (0.063 ± 0.006) (0.020 ± 0.010) (0.020 ± 0.010) (0.022 ± 0.004)
CRM2010
5.00 ± 0.20 2.50 ± 0.20 0.60 ± 0.25 0.60 ± 0.25 0.60 ± 0.10
(0.197 ± 0.008) (0.098 ± 0.008) (0.024 ± 0.010) (0.024 ± 0.010) (0.024 ± 0.004)
Exceptions:
(1)
±1 %, 1 ohm to 9.76 ohms: ±150 ppm (CRM0805)
(2)
Jumper (0 ohms): Temperature coeffi cient is not applicable.
For Standard Values Used in Capacitors,
Inductors and Resistors, click here.