NT
Features
■
Thick film technology
■
Power rating of 2 watts at 70 °C
■
RoHS compliant*
Applications
■
Power supplies
■
Stepper motor drives
*R
oH
S
CO
M
PL
IA
CRM2512 - Pulse Resistant Power Resistor
Electrical Characteristics
Power Rating @ 70 °C
Operating Temperature Range
Derated to Zero Load at
Maximum Working Voltage
0.047 to 0.91 ohms
1.0 ohm to 1.0 megohm
Insulation Resistance
Resistance Range
2W
-55 °C to +155 °C
+155 °C
3017 mV
600 V
> 1000 megohms
0.047 - 0.91 ohm (E24 Values)
1.0 - 9.1 ohms (E24 Values)
10.0 ohms - 1 megohm (E24 + E96 Values)
±1 %, ±5 %
±150 PPM/°C
±100 PPM/°C
±200 PPM/°C
±100 PPM/°C
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 inrush
current limiting.
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%
Resistance Tolerance
Temperature Coefficient
0.047 to 0.091 ohms
0.100 to 0.91 ohms
1.0 ohm to 1 megohm
10 ohms to 1 megohm
For Standard Values Used in Capacitors, Inductors, and Resistors,
click here.
Recommended Solder Pad Layout
L
B
Product Dimensions
A
DIMENSIONS:
MM
(INCHES)
6.3 ± 0.20
(0.248 ± 0.008)
TOP SIDE
Cu TRACE
SENSING TRACE
0.6 ± 0.20
(0.024 ± 0.008)
3.1 ± 0.20
(0.122 ± 0.008)
Model
CRM2512
A
3.7
(0.146)
B
2.45
(0.096)
L
2.7
(0.106)
0.6 ± 0.20
(0.024 ± 0.008)
1.8 ± 0.20
(0.070 ± 0.008)
Soldering Profile
Derating Curve
Power Ratio (%)
250
Peak 260 +5/-0 °C
230 °C or higher
Pre-heating Zone
100
Temperature (°C)
200
180 °C
150
100
150 °C
90 ± 30 seconds
30 ± 10 seconds
Soldering Zone
50
Heating Time
-55
70
155
Ambient Temperature (°C)
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications
CRM2512 - Pulse Resistant Power Resistor
Pulse Load Characteristics (R > 1 Ohm)
1000
PEAK POWER (W)
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)
• W = ±200 PPM/°C
• Z = ±150 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.
Customers should verify actual device performance in their specific applications
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.
60.0
(2.362)
MIN.
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)
4.0 ± 0.05
(0.157 ± 0.002)
6.9 ± 0.2
(0.272 ± 0.008)
USER DIRECTION OF FEED
15.4 ± 2.0
(0.606 ± 0.079)
13.0 ± 1.0
(0.512 ± 0.039)
DIMENSIONS:
MM
(INCHES)
REV. 05/11
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications
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