CMF-SD Datasheet, PDF (1/3 Pages) Bourns Electronic Solutions – Telecom CPTC Resettable Fuses

*RoHS ^COMPLIANT
Features
■ 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.
■ Narrow resistance tolerance
■ RoHS compliant*
Applications
Used as a secondary overcurrent protection
device in:
■ Customer Premise Equipment (CPE)
■ Central Office (CO)
■ Access equipment
CMF-SD Series - Telecom CPTC Resettable Fuses
Electrical Characteristics
Model
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
Induction
Voltage Rated
Withstand Voltage
Rated
Resistance
(RN)
Resistance
Matching
In Housing
Hold
Current
Trip
Current
Time to Trip
Imax @ @ Imax/
230 VAC 230 VAC
VAC
Volts Ohms Tolerance Ohms Amps @ 25 °C Amps @ 25 °C Amps Seconds
600
230
25 ±20 %
± 0.5
0.130
0.260
2.8
< 0.3
600
230
25 ±10 %
± 0.5
0.130
0.260
2.8
< 0.3
600
230
35 ±20 %
± 0.5
0.100
0.200
3
< 0.2
600
230
35 ±10 %
± 0.5
0.100
0.200
3
< 0.2
600
230
35 ±20 %
± 0.5
0.100
0.200
2.5
< 0.2
600
230
35 ±10 %
± 0.5
0.100
0.200
2.5
< 0.2
600
230
50 ±20 %
± 0.5
0.090
0.190
3
< 0.1
600
230
50 ±10 %
± 0.5
0.090
0.190
3
< 0.1
600
230
50 ±20 %
± 0.5
0.090
0.190
3
< 0.1
600
230
50 ±10 %
± 0.5
0.090
0.190
3
< 0.1
Product Dimensions
A
CMF-SD25
CMF-SD35
Dim. CMF-SD50
B
A
9.00
(.354)
MAX.
B
10.80
(.425)
MAX.
F
C
DIMENSIONS = ^MM
E
(INCHES)
D
D
E
C
Packaging options:
TAPE & REEL: CMF-SD25, CMF-SD35 & CMF-SD50
F
= 400 pcs. per reel;
CMF-SD35A & CMF-SD50A = 500 pcs. per reel
10.20 _MAX.
(.402)
4.88 - 5.28
(.192 - .208)
2.41 - 2.61
(.095 - .103)
0.5
(.020)
MAX.
CMFSD35A
CMF-SD50A
7.15
(.281)
MAX.
8.50
(.335)
MAX.
8.10 _MAX.
(.319)
3.25 - 3.65
(.128 - .144)
2.41 - 2.61
(.095 - .103)
0.5
(.020)
MAX.
Recommended Pad Layout
B
1
A
3
2
4
C
H
G
F
DE
1
2
3
4
Typical Part Marking
Represents total content. Layout may vary.
PART
IDENTIFICATION:
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
356G
MANUFACTURER'S
TRADEMARK
BI-WEEKLY
DATE CODE:
WEEK 13-14 = G
YEAR CODE:
6 = 2006
How to Order
CMF - SD 35 A -10 - 2
Product Designator
Style
SD = Surface Mount Dual Pkg.
Rated Resistance (RN)
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
*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.
Dim.
A
B
CMF-SD25/
CMF-SD35/
CMF-SD50
10.0
(.394)
8.80
(.346)
3.20
C
(.126)
2.00
D
(.079)
2.60
E
(.102)
5.00
F
(.197)
7.60
G
(.299)
10.0
H
(.394)
CMF-SD35A/
CMF-SD50A
8.00
(.315)
7.05
(.278)
2.75
(.108)
2.00
(.079)
2.51
(.099)
3.45
(.136)
5.95
(.234)
8.15
(.321)