Features
■ Industry’s lowest internal resistance
■ Switches at optimum temperature
■ Axial leaded, with fl exible design options
available
■ Fully compatible with current industry
standards
■ Weldable nickel terminals
■ RoHS compliant*
MF-SVS Series - PTC Resettable Fuses
Environmental Characteristics
Operating Temperature ......................................... -40 °C to +85 °C
Storage Conditions............................................... +40 °C max. 70 % R.H. max.
Maximum Device Surface Temperature
in Tripped State ................................................ 125 °C
Passive Aging ....................................................... +60 °C, 1000 hours ............................................... ±10 % typical resistance change
Humidity Aging ..................................................... +60 °C, 85 % R.H. 1000 hours ............................. ±10 % typical resistance change
Thermal Shock ..................................................... MIL-STD-202F, Method 107G, ............................. ±5 % typical resistance change
+85 °C to -40 °C, 10 times
Vibration ............................................................... MIL-STD-883C,..................................................... No change
Condition A
Test Procedures And Requirements For Model MF-SVS 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 specifi ed 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
UL File Number .................................................... E 174545S
CSA File Number .................................................. CA 110338
TÜV File Number .................................................. R2057213
Electrical Characteristics
Model V max.
Volts
I max.
Amps
Ihold Itrip Initial
Resistance
1 Hour (R1)
Post-Trip
Resistance
Max. Time
to Trip
Tripped
Power
Dissipation
Amperes
at 23 °C
Ohms
at 23 °C
Ohms
at 23 °C
Amperes
at 23 °C
Seconds
at 23 °C
Watts
at 23 °C
Hold Trip Min. Max. Typ. Max. Typ.
MF-SVS170 10 100 1.7 4.1 0.018 0.032 0.023 0.064 8.5 5.0 2.1
MF-SVS175 10 100 1.75 4.2 0.017 0.031 0.022 0.063 8.5 5.0 2.1
MF-SVS210 10 100 2.1 5.0 0.010 0.020 0.016 0.040 10.5 5.0 2.4
MF-SVS230 10 100 2.3 5.2 0.010 0.018 0.014 0.036 12.5 5.0 2.6
*RoHS Directive 2002/95/EC Jan 27 2003 including Annex.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications
Thermal Derating Chart - Ihold (Amps)
Model Ambient Operating Temperature
-40 ºC -20 ºC 0 ºC 23 ºC 40 ºC 50 ºC 60 ºC 70 ºC 85 ºC
MF-SVS170 3.3 2.8 2.3 1.7 1.3 1.0 0.8 0.5 0.1
MF-SVS175 3.4 2.9 2.3 1.75 1.3 1.1 0.8 0.5 0.1
MF-SVS210 3.8 3.3 2.7 2.1 1.6 1.3 1.1 0.8 0.4
MF-SVS230 4.2 3.6 3.0 2.3 1.8 1.4 1.1 0.8 0.4
*Itrip is approximately two times Ihold.