Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302 Tel: 201-432-0463 Fax: 201-432-9542 E-Mail: belfuse@belfuse.com
Website: www.belfuse.com
ORDERING INFORMATION SEE PAGES 67 & 68
Specifications subject to change without notice
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SMP Surface Mount Power Cross Protection Fuses are primarily intended
for use in telecommunication circuit applications requiring low current
protection with high surge tolerance. They are typically used to replace heat coil
type devices. They are designed to be placed between the line input and the surge
arresting components (mov. gas tube, zenor diode, air gaps, etc.)
These fuses will withstand transient surge currents generated by lightning in
accordance with the attached table.
SMP Fuses guard protected circuitry against sustained overload or short
circuit conditions. Such sustained overloads may be generated by accidental
contact between utility cables and phone lines (power line cross).
SMP Fuse are used in circuits to obtain compliance with the test
requirements specified in UL 1950/60950 and Bellcore GR 1089.
Electrical Characteristics
(UL STD. 248-14)
Approvals
Environmental Specification
Soldering Techniques & Compatability
Reflow: Industrial standard, 240
C peak
Shock
MIL-STD-202, Method 213, Test Condition I (100 G's peak for
6 milliseconds)
Vibration
MIL-STD-202, Method 201 (10-55 Hz, 0.06 inch, total
excursion)
Salt Spray
MIL-STD-202, Method 101, Test condition B (48 hrs)
Insulation Resistance
MIL-STD-202, Method 302, Test Condition A
(After Opening) 10,000 ohms minimum
Solderability
MIL-STD-202, Method 208
Resistance to solder Heat
MIL-STD-202, Method 210, Test Condition J (235
C, 30 sec)
Consult manufacturer for other ratings
Mechanical Dimensions
Type SMP
Surface Mount Power Cross Protection Fuse
SMPD0104
Physical Specification
Materials
Ceramic Body / Tin Plated Brass Caps
Lead Free Solder
Marking
On fuse: "bel", "Current Rating"
On label: Above info; "Type", "Voltage Rating", "Appropriate Safety Logos"
Interrupting Rating plus "
c"
Packaging
2,000 fuses in 13 inches dia. reel, 16 mm wide tape, 8 mm pitch,
per EIA standard 481
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SMP 1.25 Surge Withstand Ratings
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bel 1.25
3 . 0 5
0 . 1 3 m m
( 0 . 1 2 0 "
0 . 0 0 5 " )
3 . 0 5
0 . 1 3 m m
( 0 . 1 2 0 "
0 . 0 0 5 " )
2 . 0 3
0 . 1 0 m m
( 0 . 0 8 0 "
0 . 0 0 4 " )
9 . 6 5
0 . 2 5 m m
( 0 . 3 8 "
0 . 0 1 " )
3 . 8 1 m m
( 0 . 1 5 " )
4 . 0 6 m m
( 0 . 1 6 " )
5 . 0 8 m m
( 0 . 2 0 " )
Recommended pad layout
SMP
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Thermal Shock
MIL-STD-202, Method 107, Test Condition B (-65
C to +125
C)
Operating Temperature
-55
C to +125
C
Power Cross (Telecom) Rating
(Fuse Rated 0.1-1.5A)
19
Waveform Duration Of A/B Seconds
Current
Time
T2
T1
0.1 lp
0.9 lp
b
TO
a
(Peak Value) lp
0.5 lp
A = Rise Time = T1-T0 (1.25(b-a)
B = Duration = T2-T0
Double-exponential
Impulse Waveform
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TIME IN SECONDS
CURRENT IN AMPERES
Specifications subject to change without notice
NOTE - see important information under "User Guide"on P.08
Corporate Office
Bel Fuse Inc.
206 Van Vorst Street, Jersey City, NJ 07302
Tel: 201-432-0463
Fax: 201-432-9542
E-Mail: belfuse@belfuse.com
Website: www.belfuse.com
Far East Office
Bel Fuse Ltd.
8F/8 Luk Hop Street
San Po Kong
Kowloon, Hong Kong
Tel: 852-2328-5515
Fax: 852-2352-3706
European Office
Bel Fuse Europe Ltd.
Preston Technology Management Centre
Marsh Lane, Preston PR1 8UD
Lancashire, U.K
Tel: 44-1772-556601
Fax: 44-1772-888366
SMP - TIME CURRENT CHARACTERISTIC CURVE
Type SMP
Surface Mount Power Cross Protection Fuse
SMPC0901
1000
100
10
1
0.1
0.01
10000
10
1000
100
10
100
1
0.1
0.01
-
500mA
-
1.25A
20
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