Features
n
Thick film technology
Applications
n
Current sensing
n
Power supplies
n
Stepper motor drives
n
Snubber resistor for flyback power supplies
R10
0
General Information
n
Power rating of 2 watts at 70 °C
n
Low resistance value available
n
RoHS compliant*
CRM2512 - High Power Current Sense Chip Resistors
Additional Information
Click these links for more information:
The Bourns
®
CRM2512 Series is a thick film power resistor with a rating of 2 watts in
a standard 2512 chip format. This product has a very wide resistance range, making it
suitable for different applications in power supply circuits including current sensing and
current limiting.
PRODUCT
TECHNICAL INVENTORY
LIBRARY
SAMPLES
CONTACT
Electrical Characteristics
Characteristic
Power Rating @ 70 °C
Operating Temp. Range
Derated to Zero Load at
Maximum Working Voltage
Maximum Overload Voltage
Insulation Resistance
Resistance Range
Resistance Tolerance
Temperature Coefficient
Zero Ohm Jumper
<0.02
W
Max. Rated Current
Notes:
(1) CRM2512 2 W loading with total solder pad and trace size of 300 mm
2
.
(2) E = (PxR)
1/2
E: Working Voltage (V); P: Rated Power (W); R: Resistance Value (W)
(0.047 to 0.91
W)
1349 mV
3017 mV
0.047 - 0.91
W
(E24 Values)
±1 % & ±5 %
(E96 + E24 Values)
Model CRM2512
(0
W,1 W
to 1 M
W)
2W
-55 °C to +155 °C
+155 °C
300 V
600 V
> 1000 MW
1
W
- 9.76
W
10
W
- 1 M
W
±1 %
±100 PPM/°C
±1 %
±100 PPM/°C,
±200 PPM/°C
(E96 + E24 Values)
0
W,
1.0 - 1 M
W
(E24 Values)
±5 %
±100 PPM/°C
6A
±200 PPM/°C
(3) Jumper (0
W):
Rated current 6 A maximum with 300 mm
2
pad.
Temperature coefficient is not applicable.
For Standard Values Used in Capacitors, Inductors, and Resistors,
click here.
Environmental Characteristics
Moisture Sensitivity Level .........................1
Characteristic Data
Test
Load Life (1000 hours)
1 % Tolerance
5 % Tolerance
Short Term Overload
1 % Tolerance
5 % Tolerance
Thermal Shock
1 % Tolerance
5 % Tolerance
ΔR
Max.
<1%
<3%
<1%
<2%
< 0.5 %
<1%
WARNING Cancer and Reproductive Harm -
www.P65Warnings.ca.gov
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.
CRM2512 - High Power Current Sense Chip Resistors
Product Dimensions
6.3 ± 0.20
(0.248 ± 0.008)
3.1 ± 0.20
(0.122 ± 0.008)
3.7
(.146)
0.6 ± 0.20
(0.024 ± 0.008)
7.6
(.299)
Recommended Solder Pad Layout
2.45
(.096)
Derating Curve
Power Ratio (%)
100
TOP SIDE
0.6 ± 0.20
(0.024 ± 0.008)
-55
70
155
1.8 ± 0.20
(0.070 ± 0.008)
-OR-
0.9 ± 0.25
(0.035 ± 0.010)
FOR RESISTANCE VALUES LOWER THAN 1 OHM
Ambient Temperature (°C)
MM
DIMENSIONS:
(INCHES)
How to Order
CRM 2512 - F X - R100 E LF
Model
(CRM = Precision Chip Resistor)
Size
2512 = 2512 Size
Resistance Tolerance
• F = ±1 %
• J = ±5 %
TCR (PPM/°C - See Electrical Characteristics chart)
• W = ±200 PPM/°C
• X = ±100 PPM/°C
• / = Jumper
Resistance Value
• 1 % or 5 % Tolerance:
R <1 ohm..............“R” represents decimal point followed by three significant digits
(example: R100 = 0.100 ohm)
• 1% Tolerance:
<100 ohms ...........“R” represents decimal point (example: 24R3 = 24.3 ohms)
≥100 ohms ...........First three digits are significant, fourth digit represents number of zeros to follow
(example: 8252 = 82.5K ohms)
• 5% Tolerance:
<10 ohms .............“R” represents decimal point (example: 4R7 = 4.7 ohms)
≥10 ohms .............First two digits are significant, third digit represents number of zeros to follow
(example: 474 = 470K ohms)
0 ohm Jumper ......“000”
Packaging
• E = 4000 pieces per 180 mm (7 inch) reel
Termination
• LF = Tin-plated (RoHS Compliant)
Soldering Profile
250
200
180 °C
150
100
150 °C
90 ± 30 seconds
30 ± 10 seconds
Soldering Zone
50
Heating Time
Peak 260 +5/-0 °C
230 °C or higher
Pre-heating Zone
Temperature (°C)
Specifications are subject to change without notice.
Users should verify actual device performance in their
specific applications.
The products described herein and this document are
subject to specific legal disclaimers as set forth on the
last page of this document, and at www.bourns.com/
docs/legal/disclaimer.pdf.
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®
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PDF:
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C1753 05/17/18R
Electronics Design Contest
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