*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.
1 Hour (R1) Tripped
Ihold Itrip Initial Post-Trip Max. Time Power
Resistance Resistance To Trip Dissipation
Model Amperes Ohms Ohms Amperes Seconds Watts
V max. I max.
at 23 °C at 23 °C at 23 °C at 23 °C at 23 °C at 23 °C
Volts Amps
Hold Trip Min. Max. Max. Typ.
MF-S120 15 100 1.20 2.70 0.085 0.160 0.220 6 5.0 1.20
MF-S120S 15 100 1.20 2.70 0.085 0.160 0.220 6 5.0 1.20
MF-S150 15 100 1.50 3.00 0.050 0.090 0.113 8 5.0 1.30
MF-S175 15 100 1.75 3.80 0.050 0.090 0.120 9 4.0 1.50
MF-S175S 15 100 1.75 3.80 0.050 0.090 0.120 9 4.0 1.50
MF-S200 30 100 2.00 4.40 0.030 0.060 0.080 10 4.0 1.90
MF-S350 30 100 3.50 6.30 0.017 0.031 0.040 20 3.0 2.50
MF-S420 30 100 4.20 7.60 0.012 0.024 0.040 20 6.0 2.90
MF-S Series - PTC Resettable Fuses
Electrical Characteristics
Features
■Axial leaded
■Fully compatible with current
industry standards
■Weldable nickel terminals
■Very low internal resistance
■Agency recognition:
■RoHS compliant*
■Lead free
Applications
■Rechargeable Battery Pack Protection
■Provides overcurrent protection with
125 °C trip temperature
NOTE: Slotted lead option available on all models.
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
Vibration ..............................................................MIL-STD-883C, Method 2007.1, ................No change
Condition A
Environmental Characteristics
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
UL File Number ..................................................E 174545S
CSA File Number ................................................CA 110338
TÜV File Number ................................................R2057213
Test Procedures And Requirements For Model MF-S Series
Thermal Derating Chart - Ihold / Itrip (Amps)
Ambient Operating Temperature
Model -40 °C -20 °C0
°C 23 °C 40 °C 50 °C 60 °C 70 °C 85 °C
MF-S120 1.90 / 4.28 1.70 / 3.83 1.50 / 3.38 1.20 / 2.70 1.00 / 2.25 0.90 / 2.03 0.80 / 1.80 0.70 / 1.58 0.50 / 1.13
MF-S120S 1.90 / 4.28 1.70 / 3.83 1.50 / 3.38 1.20 / 2.70 1.00 / 2.25 0.90 / 2.03 0.80 / 1.80 0.70 / 1.58 0.50 / 1.13
MF-S150 2.20 / 4.40 2.00 / 4.00 1.80 / 3.60 1.50 / 3.00 1.30 / 2.60 1.10 / 2.20 1.00 / 2.00 0.90 / 1.80 0.70 / 1.40
MF-S175 2.50 / 5.59 2.30 / 5.14 2.00 / 4.47 1.70 / 3.80 1.50 / 3.35 1.30 / 2.91 1.20 / 2.68 1.10 / 2.46 0.90 / 2.01
MF-S175S 2.50 / 5.59 2.30 / 5.14 2.00 / 4.47 1.70 / 3.80 1.50 / 3.35 1.30 / 2.91 1.20 / 2.68 1.10 / 2.46 0.90 / 2.01
MF-S200 3.20 / 7.04 2.80 / 6.16 2.50 / 5.50 2.00 / 4.40 1.70 / 3.74 1.60 / 3.52 1.40 / 3.08 1.20 / 2.64 0.90 / 1.98
MF-S350 5.40 / 9.72 4.80 / 8.64 4.30 / 7.74 3.50 / 6.30 3.00 / 5.40 2.80 / 5.04 2.50 / 4.50 2.20 / 3.96 1.70 / 3.06
MF-S420 6.40 / 11.5 5.70 / 10.3 5.10 / 9.23 4.20 / 7.60 3.60 / 6.51 3.30 / 5.97 3.00 / 5.43 2.60 / 4.70 2.10 / 3.80