Features
■ High power density
■ Can withstand ITU-T K.20, K.21 and K.45
basic test requirements
■ RoHS compliant*
Applications
■ Telecom ports designed for Metallic Ended
Line Test (MELT) functionality
■ ADSL and VDSL2 telecom ports
■ Telecom line test equipment
CRM2512-FT Series Power Resistor
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications
General Information
The Model CRM2512-FT is a power
resistor rated to 2 watts continuous
power in a small 2512 size package.
It can withstand ITU-T K.20, K.21 and
K.45 basic test requirements and is
aimed at telecom applications.
*RoHS COMPLIANT
DIMENSIONS: MM
(INCHES)
Electrical Characteristics
Characteristic CRM2512-FT
Power 2 W
Resistance 10K to 1M Ohms (E24)
Working Voltage 300 V
Short Time Overload Voltage 600 V
Operating Temperature Range -55 °C to +155 °C
TCR ±100 PPM/°C
Surge Characteristics
(Per ITU-T K.20, K.21 and K.45
Test Requirements)
Wave Shape 10/700 1.5 KV ±5 pulses
Overvoltage 600 Vrms, 600 ohms, 0.2 seconds
Product Dimensions
Derating Curve
Characteristic Data
Test ΔR Max.
Load Life (1000 hours) < 1 %
Short Term Overload < 1 %
Thermal Shock < 0.5 %
600 Vrms, 600 Ohms,
0.2 Seconds, 5 Applications < 1 %
(R>20K)
600 Vrms, 600 Ohms,
0.1 Seconds, 5 Applications < 1 %
(R<20K)
10/700 1.5 kV, < 1 %
±5 Applications
6.3 ± 0.20
(0.248 ± 0.008)
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
Power Ratio (%)
Recommended Solder Pad Layout
Model A B L
CRM2512-FT 3.7 2.45 2.7
(0.146) (0.096) (0.106)
Soldering Profi le
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
A
B
Cu TRACE
L
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications
CRM2512-FT Series Power Resistor
REV. 05/22/09
How to Order
CRM 2512 - F T - 1202 E LF
Model
(CRM = High Power Resistor)
Size
2512 = 2512 Size
Resistance Tolerance
• F = ±1 %
Function
• T = Special Resistor Layout for Telecom Applications
Resistance Value
First three digits are signifi cant, fourth digit represents number of zeros to follow
Packaging
• E = 4000 pieces on 180 mm (7 inch) reel
Terminations
• LF = Tin-plated (RoHS Compliant)
Packaging Dimensions (Conforms to EIA RS-481A)
3.60 ± 0.20
(0.142 ± 0.008) 2.0 ± 0.05
(0.079 ± 0.002)
4.0 ± 0.05
(0.157 ± 0.002)
4.0 ± 0.1
(0.157 ± 0.004)
1.5 +0.1/-0
(0.059 +0.004/-0) DIA. 1.5
(0.059)
DIA. MIN.
0.85 ± 0.15
(0.033 ± 0.006)
6.9 ± 0.2
(0.272 ± 0.008)
5.5 ± 0.05
(0.217 ± 0.002)
1.75 ± 0.1
(0.069 ± 0.004)
12.0 ± 0.2
(0.472 ± 0.008)
TOP TAPE
PAPER TAPE
RESISTOR
USER DIRECTION OF FEED
60.0
(2.362)
MIN.
DIA.
DIA.
180 +0/-3
(7.09 +0/-0.118)
13.0 ± 1.0
(0.512 ± 0.039)
DIA.
15.4 ± 2.0
(0.606 ± 0.079)
13.0 ± 1.0
(0.512 ± 0.039)
DIMENSIONS: MM
(INCHES)
Pulse Load Characteristics
1000
100
10
1
0.0001 0.001
SURGE DURATION (S)
PEAK POWER (W)
0.01 1.0
