Features
n Two resistance-matched PTCs in a
ceramic housing
n Narrow resistance tolerance
n RoHS compliant*
CMF-SD Series - Telecom CPTC Resettable Fuses
*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.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
Test Procedures And Requirements For Model CMF-SD Series
Primary
Test Protection Test Condition Requirements
Mains Power Contact - ITU-T K.20, K.21 .... None .............. 230 V rms, 10 ohms, 15 Min. ..................................................... (Ri-Rf) / Ri < ±10 %
Power Induction - ITU-T K.20, K.21 ............ None .............. 600V rms, 600 ohms, 0.2 seconds, 10 cycles, every 1 Min. .....(Ri-Rf) / Ri < ±10 %
Power Induction - ITU-T K.20, K.21 ............ GDT................ 600 V rms, 600 ohms, 1 second, 10 cycles, every 1 Min. ........ (Ri-Rf) / Ri < ±10 %
Power Induction - ITU-T K.20, K.21 ............ GDT................ 600 V rms, 200 ohms, 1 second, 10 cycles, every 1 Min. ........ (Ri-Rf) / Ri < ±10 %
Lightning Surge - ITU-T K.20, K.21 ..................................... 10/700 μs, 25 ohms, 1.0 kV, 10 Tests, every 1 Min. .................(Ri-Rf) / Ri < ±10 %
Lightning Surge ................................................................... 10/1000 μs, 40 ohms, 1.0 kV, 30 Tests, every 3 Min. ................(Ri-Rf) / Ri < ±10 %
Ri = R initial
Rf = R nal
Electrical Characteristics
Model
Induction
Voltage
Withstand
Rated
Voltage
Rated
Resistance
(RN) @ 25°C
Resistance
Matching in
Housing
Hold
Current
Trip
Current
Imax @
230 VAC
Time to
Trip @
Imax / 230
VAC
VAC Volts Ohms Tolerance Ohms Amps @ 25 °C Amps @ 25 °C Amps Seconds
CMF-SD10 600 220 10 ±20 % ±1.0 0.150 0.360 1 <4.5
CMF-SD25 600 230 25 ±20 % ±0.5 0.130 0.260 2.8 < 0.3
CMF-SD25-10 600 220 25 ±10 % ±0.5 0.130 0.260 2.5 < 0.3
CMF-SD35 600 230 35 ±20 % ±0.5 0.100 0.200 3 < 0.2
CMF-SD35-10 600 230 35 ±10 % ±0.5 0.100 0.200 3 < 0.2
CMF-SD35A 600 230 35 ±20 % ±0.5 0.100 0.200 2.5 < 0.2
CMF-SD35A-10 600 230 35 ±10 % ±0.5 0.100 0.200 2.5 < 0.2
CMF-SD50 600 230 50 ±20 % ±0.5 0.090 0.190 3 < 0.1
CMF-SD50-10 600 230 50 ±10 % ±0.5 0.090 0.190 3 < 0.1
CMF-SD50A 600 230 50 ±20 % ±0.5 0.090 0.190 3 < 0.1
CMF-SD50A-10 600 230 50 ±10 % ± 0.5 0.090 0.190 3 < 0.1
How to Order
CMF - SD 35 A -10 - 2
Product Designator
Style
SD = Surface Mount Dual Pkg.
Rated Resistance (RN)
10, 25, 35, 50 (25, 35, 50 Ohms)
Reduced Footprint and Height
Option*
Resistance Tolerance Option
Blank = Standard (20 %)
-10 = 10 %
Packaging Options
- 2 = Tape & Reel
*Reduced footprint and height option currently
unavailable for Model CMF-SD25.
Typical Part Marking
Represents total content. Layout may vary.
356G
MANUFACTURER'S
TRADEMARK
PART
IDENTIFICATION:
10 = CMF-SD10
25 = CMF-SD25
35 = CMF-SD35
50 = CMF-SD50
35A = CMF-SD35A
50A = CMF-SD50A
25K = CMF-SD25-10
35K = CMF-SD35-10
50K = CMF-SD50-10
35AK = CMF-SD35A-10
50AK = CMF-SD50A-10
YEAR CODE:
6 = 2016
BI-WEEKLY
DATE CODE:
WEEK 13-14 = G
Model CMF-SD is currently available,
although not recommended for new
designs. Model CMF-SDP is
recommended.
*RoHS COMPLIANT
LEAD FREE
*RoHS COMPLIANT
VERSIONS
AVAILABLE
LEAD FREE
VERSIONS ARE
RoHS COMPLIANT*