CRM2512 - High Power Current Sense Chip Resistors
R
10 0
Features
■ Thick film technology
■ Power rating of 2 watts at 70 °C
■ Low resistance value available
■ RoHS compliant*
Applications
■ Current sensing
■ Power supplies
■ Stepper motor drives
■ Snubber resistor for flyback power supplies
General 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.
Electrical Characteristics
Characteristic
Model CRM2512
(0.047 to 0.91 Ω)(0 Ω,1 Ω to 1 M Ω)
Power Rating @ 70 °C 2 W
Operating Temp. Range -55 °C to +155 °C
Derated to Zero Load at +155 °C
Maximum Working Voltage 1349 mV 300 V
Maximum Overload Voltage 3017 mV 600 V
Insulation Resistance > 1000 MΩ
Resistance Range
0.047 - 0.91 Ω
(E24 Values)
1 Ω - 9.76 Ω
(E96 + E24 Values)
10 Ω - 1 MΩ
(E96 + E24 Values)
0 Ω, 1.0 - 1 MΩ
(E24 Values)
Resistance Tolerance ±1 % & ±5 % ±1 % ±1 % ±5 %
Temperature Coefficient ±100 PPM/°C
±100 PPM/°C,
±200 PPM/°C
±100 PPM/°C ±200 PPM/°C
Zero Ohm Jumper
<0.02 Ω Max. Rated Current
6A
Notes:
(1) CRM2512 2 W loading with total solder pad and trace size of 300 mm
2
. (3) Jumper (0 Ω): Rated current 6 A maximum with 300 mm
2
pad.
(2) E = (PxR)
1/2
Temperature coefficient is not applicable.
E: Working Voltage (V); P: Rated Power (W); R: Resistance Value (Ω) For Standard Values Used in Capacitors, Inductors, and Resistors,
click here.
Environmental Characteristics
Moisture Sensitivity Level .........................1
Characteristic Data
Test ΔR Max.
Load Life (1000 hours)
1 % Tolerance < 1 %
5 % Tolerance < 3 %
Short Term Overload
1 % Tolerance < 1 %
5 % Tolerance < 2 %
Thermal Shock
1 % Tolerance < 0.5 %
5 % Tolerance < 1 %
Additional Information
Click these links for more information:
PRODUCT
SELECTOR
TECHNICAL
LIBRARY
INVENTORY SAMPLES CONTACT
*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.
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
CRM2512 - High Power Current Sense Chip Resistors
Product Dimensions
6.3 ± 0.20
(0.248 ± 0.008)
TOP SIDE
3.1 ± 0.20
(0.122 ± 0.008)
0.6 ± 0.20
(0.024 ± 0.008)
0.6 ± 0.20
(0.024 ± 0.008)
1.8 ± 0.20
(0.070 ± 0.008)
-OR-
0.9 ± 0.25
(0.035 ± 0.010)
FOR RESISTANCE VALUES LOWER THAN 1 OHM
Recommended Solder Pad Layout
7.6
(.299)
3.7
(.146)
2.45
(.096)
DIMENSIONS:
MM
(INCHES)
Derating Curve
Ambient Temperature (°C)
70 155
100
-55
Power Ratio (%)
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)
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.
Soldering Profile
50
100
150
200
250
Temperature (°C)
90 ± 30 seconds
Pre-heating Zone
150 °C
230 °C or higher
Peak 260 +5/-0 °C
180 °C
30 ± 10 seconds
Heating Time
Soldering Zone