Features
Applications
■ Axial leaded
■ Any application that requires protection
at low resistances
■ Rechargeable battery packs; designed for
NiMH and Li-Ion chemical characteristics
■ Cellular phones
■ Laptop computers
■ Fully compatible with current
industry standards
■ Weldable nickel terminals
■ Very low internal resistance
■ Low switching temperature
■ RoHS compliant*
VS240
2018S
MF-VS Series - PTC Resettable Fuses
Electrical Characteristics
1 Hour (R )
1
Post-Trip
Resistance
Tripped
Power
Dissipation
I
I
hold
trip
Initial
Resistance
Ohms
At 23 °C
Max.
0.052
0.030
0.026
Max. Time
To Trip
Amperes Seconds
Model
V max.
Volts
I max.
Amps
Amperes
At 23 °C
Hold
Ohms
Watts
At 23 °C
Typ.
At 23 °C At 23 °C At 23 °C
Max.
0.105
0.060
0.052
Trip
3.4
4.7
5.9
Min.
Typ.
MF-VS170
MF-VS210
MF-VS240
16
16
16
100
100
100
1.7
2.1
2.4
0.030
0.018
0.014
0.040
0.022
0.020
8.5
10.0
12.0
3.0
5.0
6.0
1.4
1.5
1.9
Environmental Characteristics
Operating/Storage Temperature ........................-40 °C to +85 °C
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-VS 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
UL File Number ..................................................E 174545S
CSA File Number ................................................CA 110338
TÜV File Number ................................................R2057213
Thermal Derating Chart - I
(Amps)
hold
Ambient Operating Temperature
Model
-40 °C
3.2
4.1
-20 °C
2.7
3.5
0 °C
2.2
2.9
23 °C
1.7
40 °C
1.3
50 °C
1.1
60 °C
0.8
70 °C
0.6
85 °C
0.1
MF-VS170
MF-VS210
MF-VS240
2.1
1.6
1.3
1.0
0.7
0.1
4.2
3.6
3.0
2.4
1.9
1.5
1.2
0.8
0.1
*I
is approximately two times I
hold.
trip
*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.