Features
Applications
Used as a secondary overcurrent protection
device in:
■ Two resistance-matched PTCs in a
ceramic housing
■ Aids compliance with:
- ITU-T K.20/21/45
- Telcordia GR-1089-CORE
- UL 60950, 3rd Ed.
■ Customer Premise Equipment (CPE)
■ Central Office (CO)
■ Access equipment
■ Narrow resistance tolerance
■ RoHS compliant*
CMF-SD Series - Telecom CPTC Resettable Fuses
Electrical Characteristics
Induction
Voltage
Withstand Voltage
Rated
Resistance
(RN)
Resistance
Matching
In Housing
Time to Trip
@ Imax/
230 VAC
Rated
Hold
Current
Trip
Current
Imax @
230 VAC
Model
VAC
Volts
Ohms Tolerance
Ohms
Amps @ 25 °C Amps @ 25 °C
Amps
Seconds
CMF-SD25
CMF-SD25-10
CMF-SD35
CMF-SD35-10
CMF-SD35A
CMF-SD35A-10
CMF-SD50
CMF-SD50-10
CMF-SD50A
CMF-SD50A-10
600
600
600
600
600
600
600
600
600
600
230
230
230
230
230
230
230
230
230
230
25
25
35
35
35
35
50
50
50
50
20 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
20 ꢀ
10 ꢀ
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.130
0.130
0.100
0.100
0.100
0.100
0.090
0.090
0.090
0.090
0.260
0.260
0.200
0.200
0.200
0.200
0.190
0.190
0.190
0.190
2.8
2.8
3
< 0.3
< 0.3
< 0.2
< 0.2
< 0.2
< 0.2
< 0.1
< 0.1
< 0.1
< 0.1
3
2.5
2.5
3
3
3
3
Product Dimensions
Recommended Pad Layout
B
A
CMF-SD25
CMF-SD35
CMFSD35A
1
Dim. CMF-SD50
CMF-SD50A
9.00
(.354)
7.15
MAX.
(.281)
2
MAX.
A
B
B
A
3
G
10.80
(.425)
8.50
MAX.
(.335)
MAX.
MAX.
F
4
10.20
(.402)
8.10
MAX.
(.319)
C
D
E
F
F
D
E
C
MM
(INCHES)
E
4.88 - 5.28
(.192 - .208)
3.25 - 3.65
(.128 - .144)
DIMENSIONS =
H
D
2.41 - 2.61
(.095 - .103)
2.41 - 2.61
(.095 - .103)
1
2
4
C
0.5
0.5
Packaging options:
TAPE & REEL: CMF-SD25, CMF-SD35 & CMF-SD50
= 400 pcs. per reel;
MAX.
(.020)
MAX.
(.020)
3
CMF-SD35A & CMF-SD50A = 500 pcs. per reel
Typical Part Marking
How to Order
CMF - SD 35 A -10 - 2
CMF-SD25/
CMF-SD35/ CMF-SD35A/
Represents total content. Layout may vary.
Dim. CMF-SD50
CMF-SD50A
8.00
MANUFACTURER'S
TRADEMARK
10.0
(.394)
PART
IDENTIFICATION:
25 = CMF-SD25
Product Designator
A
B
C
D
E
(.315)
Style
8.80
(.346)
7.05
(.278)
35 = CMF-SD35
SD = Surface Mount Dual Pkg.
BI-WEEKLY
DATE CODE:
WEEK 13-14 = G
50 = CMF-SD50
356G
Rated Resistance (RN)
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
3.20
(.126)
2.75
(.108)
YEAR CODE:
6 = 2006
Reduced Footprint and Height Option
2.00
(.079)
2.00
(.079)
Resistance Tolerance Option
Blank = Standard (20 ꢀ)
-10 = 10 ꢀ
2.60
(.102)
2.51
(.099)
Packaging Options
- 2 = Tape & Reel
5.00
3.45
(.197)
(.136)
F
7.60
(.299)
5.95
(.234)
G
H
10.0
(.394)
8.15
(.321)
*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.
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