Bourns CMF-SD50A-10 Telecom cptc resettable fus Datasheet

NT
Features
S
CO
M
PL
IA
■
*R
oH
■
■
■
Applications
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*
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
Induction
Voltage
Withstand
Rated
Voltage
VAC
Volts
Ohms
Tolerance
Ohms
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
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
Rated
Resistance
(RN)
Resistance
Matching
In Housing
Hold
Current
Trip
Current
Imax @
230 VAC
Time to Trip
@ Imax/
230 VAC
Amps
Seconds
2.8
2.8
3
3
2.5
2.5
3
3
3
3
< 0.3
< 0.3
< 0.2
< 0.2
< 0.2
< 0.2
< 0.1
< 0.1
< 0.1
< 0.1
Amps @ 25 °C Amps @ 25 °C
0.130
0.130
0.100
0.100
0.100
0.100
0.090
0.090
0.090
0.090
Product Dimensions
0.260
0.260
0.200
0.200
0.200
0.200
0.190
0.190
0.190
0.190
Recommended Pad Layout
B
A
B
Dim.
CMF-SD25
CMF-SD35
CMF-SD50
CMFSD35A
CMF-SD50A
A
9.00
MAX.
(.354)
7.15
MAX.
(.281)
B
10.80
MAX.
(.425)
8.50
MAX.
(.335)
C
10.20
MAX.
(.402)
8.10
MAX.
(.319)
D
4.88 - 5.28
(.192 - .208)
3.25 - 3.65
(.128 - .144)
E
2.41 - 2.61
(.095 - .103)
2.41 - 2.61
(.095 - .103)
F
0.5
MAX.
(.020)
1
2
A
3
G
F
4
F
DIMENSIONS =
MM
(INCHES)
E
D
C
Packaging options:
TAPE & REEL: CMF-SD25, CMF-SD35 & CMF-SD50
= 400 pcs. per reel;
CMF-SD35A & CMF-SD50A = 500 pcs. per reel
Typical Part Marking
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
MANUFACTURER'S
TRADEMARK
356G
BI-WEEKLY
DATE CODE:
WEEK 13-14 = G
YEAR CODE:
6 = 2006
CMF - SD 35 A -10 - 2
Product Designator
Style
SD = Surface Mount Dual Pkg.
Rated Resistance (RN)
25, 35, 50 (25, 35, 50 Ohms)
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.
E
H
1
2
3
4
CMF-SD25/
CMF-SD35/
Dim. CMF-SD50
CMF-SD35A/
CMF-SD50A
A
10.0
(.394)
8.00
(.315)
B
8.80
(.346)
7.05
(.278)
C
3.20
(.126)
2.75
(.108)
D
2.00
(.079)
2.00
(.079)
E
2.60
(.102)
2.51
(.099)
F
5.00
(.197)
3.45
(.136)
G
7.60
(.299)
5.95
(.234)
H
10.0
(.394)
8.15
(.321)
Reduced Footprint and Height Option
Resistance Tolerance Option
Blank = Standard (20 %)
-10 = 10 %
D
0.5
MAX.
(.020)
How to Order
Represents total content. Layout may vary.
C
CMF-SD Series - Telecom CPTC Resettable Fuses
Solder Reflow Recommendations
300
Preheating
Soldering
Cooling
10–20
120
Temperature (°C)
250
200
150
100
50
0
160–220
Solder reflow
• Recommended reflow methods: IR, vapor phase oven, hot air oven.
• Devices are not designed to be wave soldered to the bottom side of the
board.
• Gluing the devices is not recommended.
• Recommended maximum paste thickness is 0.25 mm (.010 inch).
• Devices can be cleaned using standard industry methods and solvents.
Note:
• If reflow temperatures exceed the recommended profile, devices may not
meet the performance requirements.
Rework
• A device should not be reworked.
Time (seconds)
Reliable Electronic Solutions
Asia-Pacific:
Tel: +886-2 2562-4117 • Fax: +886-2 2562-4116
Europe:
Tel: +41-41 768 5555 • Fax: +41-41 768 5510
The Americas:
Tel: +1-951 781-5500 • Fax: +1-951 781-5700
www.bourns.com
CMF-SD SERIES, REV. F, 08/07
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
CMF-SD Series Tape and Reel Specifications
CMF-SD25-2
CMF-SD35-2
CMF-SD50-2
Tape Dimensions per EIA 481-2
CMF-SD35A-2
CMF-SD50A-2
W
24.0 +0.30/-0.10
(0.945 +0.012/-0.004 )
16.0 ± 0.10
(0.630 ± 0.004 )
P0
4.00 ± 0.10
(0.157 ± 0.004)
4.00 ± 0.10
(0.157 ± 0.004)
P1
16.0 ± 0.10
(0.630 ± 0.004)
12.0 ± 0.10
(0.472 ± 0.004)
P2
2.00 ± 0.10
(0.079 ± 0.004)
2.00 ± 0.10
(0.079 ± 0.004)
A0
10.2 ± 0.10
(0.402 ± 0.004)
8.35 ± 0.10
(0.329 ± 0.004)
B0
9.0 ± 0.10
(0.354 ± 0.004)
8.30 ± 0.10
(0.327 ± 0.004)
D0
1.5 +0.10/-0.0
(0.059 +0.004/-0.0)
1.5 +0.10/-0.0
(0.059 +0.004/-0.0)
F
11.5 ± 0.10
(0.453 + 0.004)
7.5 ± 0.10
(0.295 + 0.004)
E1
1.75 ± 0.10
(0.069 ± 0.004)
1.75 ± 0.10
(0.069 ± 0.004)
0.50
(0.020)
0.50
(0.020)
11.0 ± 0.10
(0.433 ± 0.004)
8.80 ± 0.10
(0.346 ± 0.004)
T max.1
K0
D
P2
P0
E
CMF-SD25-2
CMF-SD35-2
CMF-SD50-2
T
F
W
330 -2/+0
(12.99 -.079/+0)
DIA.
B0
P
A0
K0
16.4 +2.0/-0
(.646 +.079/-0)
5°
CMF-SD35A-2
CMF-SD50A-2
D
P2
P0
F
W
P
B0
K1
A0
20 °
8°
K0
9.1
(.358)
UNIT =
13.2 +0.2/-0
(.520 +.008/-0
100 ± 1.5
DIA.
(3.94 ± .059)
0.50
(.020)
E
D1
MAX.
22.4
(.882)
330 -2/+0
(12.99 -.079/+0)
DIA.
16.4 +2.0/-0
(.646 +.079/-0)
MAX.
22.4
(.882)
13.2 +0.2/-0
(.520 +.008/-0
100 ± 1.5
(3.94 ± .059)
DIA.
MM
(INCHES)
4.5
(.177)
A0
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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