Features
Applications
■ Surface Mount Devices
■ High voltage surge capabilities
■ Binned and sorted resistance ranges
Used as a secondary overcurrent protection
device in:
■ Customer Premise Equipment (CPE)
■ Central Office (CO)
■ Subscriber Line Interface Cards (SLIC)
■ Assists in meeting ITU K.20/K.21
specifications
■ RoHS compliant*
■ Agency recognition:
T
V Rheinland
MF-SM013/250 - Telecom PTC Resettable Fuses
Electrical Characteristics
Max.
Oper.
Voltage
Max.
Interrupt
Ratings
One Hour
Post-Trip
Tripped
Power
Hold
Current
Initial
Resistance
Resistance Dissipation
Model
Volts
Volts
(V)
Amps
(A)
Amps
at
23 °C
Ohms
Ohms
at
23 °C
Ohms
at
23 °C
Watts
at
23 °C
at
23 °C
Max.
Max.
I
Min.
Max.
Max.
Tꢁp.
H
MF-SM01±/250-2
60
60
60
60
250
250
250
250
±.0
±.0
±.0
±.0
0.1±
0.1±
0.1±
0.1±
6.5
6.5
9.0
7.0
12.0
9.0
12.0
10.0
20.0
20.0
20.0
20.0
±.±
±.±
±.±
±.±
MF-SM01±/250-A-2
MF-SM01±/250-B-2
MF-SM01±/250-C-2
Environmental Characteristics
Operating/Storage Temperature ..............................-45 °C to +85 °C
Maximum Device Surface Temperature
in Tripped State......................................................125 °C
Passive Aging ..........................................................+85 °C, 1000 hours ..........................................................±2 ꢀ tꢁpicaꢂ resistance change
+60 °C, 1000 hours
±± ꢀ tꢁpicaꢂ resistance change
Humiditꢁ Aging ........................................................+85 °C, 85 ꢀ R.H. 500 hours ..........................................±± ꢀ tꢁpicaꢂ resistance change
Thermaꢂ Shock ........................................................MIL-STD-202F, Method 107G, ........................................±10 ꢀ tꢁpicaꢂ resistance change
+125 °C to -55 °C,10 times
±15 ꢀ tꢁpicaꢂ resistance change
Soꢂvent Resistance ..................................................MIL-STD-202, Method 215B............................................No change
Lead Soꢂerabiꢂitꢁ ......................................................ANSI/J-STD-002
Fꢂammabiꢂitꢁ ............................................................IEC 695-2-2......................................................................No Fꢂame for 60 secs.
Vibration ..................................................................MIL-STD-88±C, Method 2007.1, Condition A..................No change
Test Procedures And Requirements For Model SM013/250 Series
Test
Test Conditions
Accept/Reject Criteria
Visuaꢂ/Mech. ............................................................Verifꢁ dimensions and materiaꢂs ......................Per MF phꢁsicaꢂ description
Resistance ..............................................................In stiꢂꢂ air @ 2± °C ............................................Rmin ≤ R ≤ Rmax
Time to Trip ..............................................................At specified current, Vmax, 2± °C....................T ≤ max. time to trip (seconds)
Hoꢂd Current ............................................................±0 min. at Ihoꢂd ................................................No trip
Trip Cꢁcꢂe Life ..........................................................Vmax, Imax, 100 cꢁcꢂes ..................................No arcing or burning
Trip Endurance ........................................................Vmax, 48 hours................................................No arcing or burning
Soꢂderabiꢂitꢁ ............................................................MIL-STD-202F, Method 208F ..........................95 ꢀ min. coverage
UL Fiꢂe Number........................................................E 174545S
CSA Fiꢂe Number ....................................................CA 110±±8
TÜV Fiꢂe Number......................................................R205721±
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-SM01±/250-2
0.21 / 0.42 0.18 / 0.±7 0.16 / 0.±1 0.1± / 0.26 0.10 / 0.2± 0.09 / 0.18 0.08 / 0.15 0.07 / 0.12 0.05 / 0.10
0.21 / 0.42 0.18 / 0.±7 0.16 / 0.±1 0.1± / 0.26 0.10 / 0.2± 0.09 / 0.18 0.08 / 0.15 0.07 / 0.12 0.05 / 0.10
0.21 / 0.42 0.18 / 0.±7 0.16 / 0.±1 0.1± / 0.26 0.10 / 0.2± 0.09 / 0.18 0.08 / 0.15 0.07 / 0.12 0.05 / 0.10
0.21 / 0.42 0.18 / 0.±7 0.16 / 0.±1 0.1± / 0.26 0.10 / 0.2± 0.09 / 0.18 0.08 / 0.15 0.07 / 0.12 0.05 / 0.10
MF-SM01±/250-A-2
MF-SM01±/250-B-2
MF-SM01±/250-C-2
*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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