Model CMF-SD is currently available,
although not recommended for new
designs. Model CMF-SDP is
recommended.
Features
nꢀ Twoꢀresistance-matchedꢀPTCsꢀinꢀaꢀꢀ
ceramicꢀhousing
nꢀ Narrowꢀresistanceꢀtolerance
nꢀ RoHSꢀcompliant*ꢀ
ꢀꢀCMF-SDꢀSeriesꢀ-ꢀTelecomꢀCPTCꢀResettableꢀFuses
Electrical Characteristics
Induction
Time to
Rated
Resistance
(RN) @ 25°C
Resistance
Matching in
Housing
Trip @
Voltage
Rated
Hold
Trip
Imax @ Imax / 230
Model
Withstand Voltage
Current
Current
230 VAC
VAC
Seconds
<4.5
VAC
600
600
600
600
600
600
600
600
600
600
600
Volts
220
230
220
230
230
230
230
230
230
230
230
Ohms Tolerance
Ohms
±1.0
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
±0.5
± 0.5
Amps @ 25 °C Amps @ 25 °C
Amps
1
CMF-SD10
10
25
25
35
35
35
35
50
50
50
50
±20 %
±20 %
±10 %
±20 %
±10 %
±20 %
±10 %
±20 %
±10 %
±20 %
±10 %
0.150
0.130
0.130
0.100
0.100
0.100
0.100
0.090
0.090
0.090
0.090
0.360
0.260
0.260
0.200
0.200
0.200
0.200
0.190
0.190
0.190
0.190
CMF-SD25
2.8
2.5
3
< 0.3
< 0.3
< 0.2
< 0.2
< 0.2
< 0.2
< 0.1
< 0.1
< 0.1
< 0.1
CMF-SD25-10
CMF-SD35
CMF-SD35-10
CMF-SD35A
CMF-SD35A-10
CMF-SD50
3
2.5
2.5
3
CMF-SD50-10
CMF-SD50A
CMF-SD50A-10
3
3
3
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 final
Typical Part Marking
How to Order
Represents total content. Layout may vary.
CMF - SD 35 A -10 - 2
MANUFACTURER'S
TRADEMARK
PART
IDENTIFICATION:
10 = CMF-SD10
25 = CMF-SD25
35 = CMF-SD35
Product Designator
Style
SD = Surface Mount Dual Pkg.
BI-WEEKLY
DATE CODE:
WEEK 13-14 = G
356G
Rated Resistance (RN)
50 = CMF-SD50
10, 25, 35, 50 (25, 35, 50 Ohms)
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
Reduced Footprint and Height
Option*
YEAR CODE:
6 = 2016
Resistance Tolerance Option
Blank = Standard (20 %)
-10 = 10 %
Packaging Options
- 2 = Tape & Reel
*Reduced footprint and height option currently
unavailable for Model CMF-SD25.
*RoHSꢀDirectiveꢀ2002/95/ECꢀJan.ꢀ27,ꢀ2003ꢀincludingꢀannexꢀandꢀRoHSꢀRecastꢀ2011/65/EUꢀJuneꢀ8,ꢀ2011.ꢀ
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.