T PL IA N M CO *R oH S Features Applications ■ Thick film technology ■ Power supplies ■ Power rating of 2 watts at 70 °C ■ Stepper motor drives ■ RoHS compliant* CRM2512 - Pulse Resistant Power Resistor Electrical Characteristics General Information Model CRM2512 (0.110 to 0.91 Ω) Characteristic Power Rating @ 70 °C Operating Temp. Range Derated to Zero Load at Maximum Working Voltage Maximum Overload Voltage Insulation Resistance Resistance Range Model CRM2512 (0 Ω, 1.0 Ω to 1.0 MΩ) 2W -55 °C to +155 °C +155 °C 1349 mV 300 V 2698 mV 600 V > 1000 MΩ 1 Ω - 9.1 Ω 0 Ω, 0.110 - 0.91 Ω (E24 Values) 1.0 - 1 MΩ (E24 Values) 10 Ω - 1 MΩ (E24 Values) Resistance Tolerance Temperature Coefficient ±1 % & ±5 % ±100 PPM/°C ±5 % ±200 PPM/°C (E96 Values) ±1 % ±100 PPM/°C Notes: (1) CRM2512 2 W loading with total solder pad and trace size of 300 mm2. (2) E = (PxR)1/2 E: Working Voltage (V); P: Rated Power (W); R: Resistance Value (Ω) (3) Jumper (0 Ω): Rated current 6 A maximum with 300 mm2 pad. 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 inrush current limiting. Characteristic Data ΔR Max. Test Load Life (1000 hours) 1 % Tolerance 5 % Tolerance <1% <3% Short Term Overload 1 % Tolerance 5 % Tolerance <1% <2% Thermal Shock 1 % Tolerance 5 % Tolerance < 0.5 % <1% For Standard Values Used in Capacitors, Inductors, and Resistors, click here. Product Dimensions Soldering Profile 6.3 ± 0.20 (0.248 ± 0.008) 250 Peak 260 +5/-0 °C 230 °C or higher 3.1 ± 0.20 (0.122 ± 0.008) Temperature (°C) TOP SIDE 200 180 °C 150 Pre-heating Zone 0.6 ± 0.20 (0.024 ± 0.008) 150 °C 0.6 ± 0.20 (0.024 ± 0.008) 90 ± 30 seconds 100 30 ± 10 seconds Soldering Zone 50 Heating Time 1.8 ± 0.20 (0.070 ± 0.008) Recommended Solder Pad Layout 2.45 (.096) Power Ratio (%) Derating Curve 100 3.7 (.146) 7.6 (.299) -55 70 155 Ambient Temperature (°C) DIMENSIONS: *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. MM (INCHES) CRM2512 - Pulse Resistant Power Resistor Pulse Load Characteristics (R > 1 Ohm) PEAK POWER (W) 1000 100 10 1 0.0001 0.001 0.01 1.0 SURGE DURATION (S) 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 Resistance Value R <1 ohm (1 % or 5 % Tolerance: “R” (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) Packaging • E = 4000 pieces on 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 device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time. CRM2512 - Pulse Resistant Power Resistor Packaging Dimensions (Conforms to EIA RS-481A) PAPER TAPE TOP TAPE 1.5 +0.1/-0 DIA. (0.059 +0.004/-0) 1.5 (0.059) DIA. MIN. 1.75 ± 0.1 (0.069 ± 0.004) 5.5 ± 0.05 (0.217 ± 0.002) 13.0 ± 1.0 (0.512 ± 0.039) DIA. 180 +0/-3 (7.09 +0/-0.118) DIA. 12.0 ± 0.2 (0.472 ± 0.008) RESISTOR 3.60 ± 0.20 (0.142 ± 0.008) 0.85 ± 0.15 (0.033 ± 0.006) 4.0 ± 0.1 (0.157 ± 0.004) 2.0 ± 0.05 (0.079 ± 0.002) USER DIRECTION OF FEED DIMENSIONS: MM (INCHES) 60.0 (2.362) MIN. DIA. 6.9 ± 0.2 (0.272 ± 0.008) 4.0 ± 0.05 (0.157 ± 0.002) 15.4 ± 2.0 (0.606 ± 0.079) 13.0 ± 1.0 (0.512 ± 0.039) REV. 03/13 Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.