Features
Applications
Almost anywhere there is a low voltage
power supply and a load to be protected,
including:
■ Surface Mount Devices
■ Fully compatible with current
industry standards
■ Computers & peripherals
■ General electronics
■ Automotive applications
■ Packaged per EIA 481-2 standard
■ Lead free versions are RoHS compliant*
■ Agency recognition:
T
V Rheinland
MF-SM Series - PTC Resettable Fuses
Electrical Characteristics
Tripped
Power
Dissipation
Max. Time
To Trip
I
I
trip
Resistance
hold
V max.
Model
I max.
Amps
Amperes
at 23 °C
Ohms
at 23 °C
Amperes
at 23 °C
Seconds
at 23 °C
Watts
at 23 °C
Volts
R
R
Hold
0.30
0.50
0.75
1.10
Trip
Min.
1Max.
4.80
1.40
1.00
0.48
Max.
3.0
4.0
0.3
0.5
Typ.
1.7
1.7
1.7
1.7
MF-SM030
MF-SM050
MF-SM075
MF-SM100
60
60
30
30
40
40
80
80
0.60
1.00
1.50
2.20
0.90
0.35
0.23
0.12
1.5
2.5
8.0
8.0
MF-SM100/33
MF-SM125
MF-SM150
33
15
15
40
100
100
1.10
1.25
1.50
2.20
2.50
3.00
0.12
0.07
0.06
0.41
0.25
0.25
8.0
8.0
8.0
0.5
2.0
5.0
1.7
1.7
1.9
MF-SM150/33
MF-SM200
MF-SM250
MF-SM260
33
15
15
6
40
100
100
100
1.50
2.00
2.50
2.60
3.00
4.00
5.00
5.20
0.06
0.23
8.0
8.0
8.0
8.0
5.0
12.0
25.0
20.0
1.9
1.9
1.9
1.7
0.045
0.024
0.025
0.125
0.085
0.075
Environmental Characteristics
Operating/Storage Temperature................................................-40 °C to +85 °C
Maximum Device Surface Temperature in Tripped State ..........125 °C
Passive Aging ............................................................................+85 °C, 1000 hours.......................................................... 5 ꢀ typical resistance change
Humidity Aging ..........................................................................+85 °C, 85 ꢀ R.H. 7 days................................................ 5 ꢀ typical resistance change
Thermal Shock ..........................................................................MIL-STD-202F, Method 107G, ........................................ 10 ꢀ typical resistance change
+125 °C to -55 °C,10 cycles
Vibration ....................................................................................MIL-STD-883C, Method 2007.1, Condition A..................No change
Test Procedures And Requirements For Model MF-SM Series
Test
Test Conditions
Accept/Reject Criteria
Visual/Mech. ......................................Verify dimensions and materials............................................Per MF physical description
Resistance..........................................In still air @ 23 °C ..................................................................Rmin ≤ R ≤ R1max
Time to Trip ........................................At specified current, Vmax, 23 °C ........................................T ≤ max. time to trip (seconds)
Hold Current ......................................30 min. at Ihold......................................................................No trip
Trip Cycle Life ....................................Vmax, Imax, 100 cycles ........................................................No arcing or burning
Trip Endurance ..................................Vmax, 48 hours......................................................................No arcing or burning
Solderability ......................................MIL-STD-202F, Method 208F................................................95 ꢀ min. coverage
UL File Number ..................................E174545
http://www.ul.com/ Follow link to Certifications, then UL File No., enter E174545
CSA File Number................................CA110338
http://directories.csa-international.org/ Under “Certification Record” and “File Number” enter 110338-0-000
TÜV Certificate Number ....................R 02057213
http://www.tuvdotcom.com/ Follow link to “other certificates”, enter File No. 2057213
Thermal Derating Chart - I
I
(Amps)
hold / trip
Ambient Operating Temperature
23 °C 40 °C 50 °C
Model
-40 °C
-20 °C
0 °C
60 °C
70 °C
85 °C
MF-SM030
MF-SM050
MF-SM075
MF-SM100
MF-SM100/33
MF-SM125
MF-SM150
MF-SM150/33
MF-SM200
MF-SM250
MF-SM260
0.45 / 0.90 0.40 / 0.80 0.35 / 0.70 0.30 / 0.60 0.25 / 0.50 0.23 / 0.46 0.20 / 0.40 0.17 / 0.34 0.14 / 0.28
0.76 / 1.52 0.67 / 1.34 0.59 / 1.18 0.50 / 1.00 0.42 / 0.84 0.38 / 0.76 0.33 / 0.66 0.29 / 0.58 0.23 / 0.46
1.13 / 2.26 1.01 / 2.02 0.88 / 1.76 0.75 / 1.50 0.62 / 1.24 0.56 / 1.12 0.50 / 1.00 0.44 / 0.88 0.34 / 0.68
1.66 / 3.32 1.47 / 2.94 1.29 / 2.58 1.10 / 2.20 0.91 / 1.82 0.83 / 1.66 0.73 / 1.46 0.64 / 1.28 0.50 / 1.00
1.66 / 3.32 1.47 / 2.94 1.29 / 2.58 1.10 / 2.20 0.91 / 1.82 0.83 / 1.66 0.73 / 1.46 0.64 / 1.28 0.50 / 1.00
1.89 / 3.78 1.68 / 3.36 1.46 / 2.92 1.25 / 2.50 1.04 / 2.08 0.94 / 1.88 0.83 / 1.66 0.73 / 1.46 0.56 / 1.12
2.27 / 4.54 2.01 / 4.02 1.76 / 3.52 1.50 / 3.00 1.25 / 2.50 1.13 / 2.26 0.99 / 1.98 0.87 / 1.74 0.68 / 1.36
2.27 / 4.54 2.01 / 4.02 1.76 / 3.52 1.50 / 3.00 1.25 / 2.50 1.13 / 2.26 0.99 / 1.98 0.87 / 1.74 0.68 / 1.36
3.02 / 6.04 2.68 / 5.36 2.34 / 4.68 2.00 / 4.00 1.66 / 3.32 1.50 / 3.00 1.32 / 2.64 1.16 / 2.32 0.90 / 1.80
3.78 / 7.56 3.35 / 6.70 2.93 / 5.86 2.50 / 5.00 2.08 / 4.16 1.88 / 3.76 1.65 / 3.30 1.45 / 2.90 1.13 / 2.26
3.64 / 7.28 3.25 / 6.50 2.91 / 5.82 2.60 / 5.20 2.26 / 4.52 2.08 / 4.16 1.95 / 3.90 1.74 / 3.48 1.48 / 2.96
*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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