Type SMP
Surface Mount Power Cross Protection Fuse
SMPD0104
Catalog
Number
Ampere
Rating
Voltage
Rating
Typical
Cold
Resistance
(ohm)
Volt-drop
Melting I2T Melting I2T Peak Surge Current Peak Surge Current
Maximum
Power
Dissipation
(W)
@100% In < 10 mSec
@10 In
(Amp)
(Amp)
(Volt)
max.
(A2 Sec)
(A2 Sec)
50 Pulses 1,000V 10 Pulses 1,000V
10 uS x 1000 uS
10 uS x 1000 uS
SMP 500
SMP 1.25
500mA
1.25A
600V
600V
0.350
0.090
0.28
0.18
1.4
14
1.8
17
25
35
0.25
0.40
100
N/A
Consult manufacturer for other ratings
SMP 1.25 Surge Withstand Ratings
SMP Surface Mount Power Cross Protection Fuses are primarily intended
Peak
Maximum
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.)
Voltage Surge Rise/Duration
Repetitions
Current
100A
Time
10 uS x 1000 uS 100 Pulses (50 Each Polarity)
1000V
2500V
5000V
500A
2 uS x 10 uS
2 uS x 10 uS
40 Pulses (20 Each Polarity)
4 Pulses (2 Each Polarity)
These fuses will withstand transient surge currents generated by lightning in
accordance with the attached table.
500A
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).
Power Cross (Telecom) Rating
(Fuse Rated 0.1-1.5A)
Double-exponential
Impulse Waveform
Waveform Duration Of A/B Seconds
Current
SMP Fuse are used in circuits to obtain compliance with the test
requirements specified in UL 1950/60950 and Bellcore GR 1089.
Clearing Time Limit
Overload
A
B
=
=
Rise Time
Duration
=
T1-T0 (1.25(b-a)
(Peak Value) lp
0.9 lp
=
T2-T0
Voltage
Current
1.25A
500mA
200% Fuse Rating
600V
600V
600V
600V
600V
max. 60 sec
max. 15 min
max. 1 sec
max. 60 sec
Electrical Characteristics (UL STD. 248-14)
0.5 lp
0.1 lp
2.2A
7A
max. 2 min
max. 100msec
max. 30 msec
max. 20 msec
Blow Time
40A
60A
max. 50 msec
max. 20 msec
Testing current
Minimum
4 hrs.
Maximum
N/A
a
TO
b
T1
Time
T2
100%
200%
500%
1000%
Thermal Shock
MIL-STD-202, Method 107,Test Condition B (-65°C to +125°C)
3 sec
60 sec
100 msec
30 msec
1.5 sec
300 msec
OperatingTemperature
-55°C to +125°C
Physical Specification
Materials
rc
Approvals
Ceramic Body /Tin Plated Brass Caps
Lead Free Solder
Safety Agency
Power
Factor
Intended
Interrupting Rating
Approvals
Application
Marking
On fuse: “bel”, “Current Rating”
On label: Above info; “Type”, “Voltage Rating”, “Appropriate Safety Logos”
60A@ 600V AC
100A@ 125V DC
Resistive
Resistive
Telecom Protection
General Purpose
Recognized File no.
E20624
r
Interrupting Rating plus “c“
Environmental Specification
SolderingTechniques & Compatability
Reflow: Industrial standard, 240°C peak
Packaging
2,000 fuses in 13 inches dia. reel, 16 mm wide tape, 8 mm pitch,
per EIA standard 481
Shock
Mechanical Dimensions
MIL-STD-202, Method 213, Test Condition I (100 G’s peak for
6 milliseconds)
±
±
3.05 0.13mm
2.03 0.10mm
Vibration
±
±
(0.120" 0.005")
(0.080" 0.004")
MIL-STD-202, Method 201 (10-55 Hz, 0.06 inch, total
excursion)
±
3.05 0.13mm
bel 1.25
±
(0.120" 0.005")
Salt Spray
±
9.65 0.25mm
MIL-STD-202, Method 101, Test condition B (48 hrs)
±
(0.38" 0.01")
SMP
Insulation Resistance
3.81mm
(0.15")
MIL-STD-202, Method 302, Test Condition A
(After Opening) 10,000 ohms minimum
4.06mm
(0.16")
Solderability
MIL-STD-202, Method 208
Recommended pad layout
5.08mm
(0.20")
Resistance to solder Heat
S
MIL-STD-202, Method 210,Test Condition J (235°C, 30 sec)
ORDERING INFORMATION SEE PAGES 67 & 68
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
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