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

CRM2512 - 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.

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.

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.

DIMENSIONS:

MM

(INCHES)

Electrical Characteristics

Product Dimensions

Derating Curve

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 %

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)

Ambient Temperature (°C)

70

155

100

-55

Recommended Solder Pad Layout

Soldering Profile

50

100

150

200

250

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

For Standard Values Used in Capacitors, Inductors, and Resistors, click here.

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. Temperature coefficient is not

applicable.

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

2698 mV

600 V

Insulation Resistance

> 1000 M

Ω

Resistance Range

0.047 - 0.91

Ω

(E24 Values)

0

Ω,

1.0 - 1 M

Ω

(E24 Values)

1

Ω - 1 MΩ

(E96 + E24

Values)

Resistance Tolerance

±1 % & ±5 %

±5 %

±1 %

Temperature Coefficient

±100 PPM/°C

±200 PPM/°C

±100 PPM/°C

Zero Ohm Jumper

<0.02

Ω Max. Rated Current

6A

7.6

(.299)

3.7

(.146)

2.45

(.096)