■ Agency recognition:
T
V Rheinland
Features
■ Axial leaded
Applications
■ Fully compatible with current
industry standards
■ Any application that requires protection
at low resistances
■ Weldable nickel terminals
■ Very low internal resistance
■ Operating currents to 9.0 Amps
■ RoHS compliant*, lead free
■ Rechargeable battery packs
■ Cellular phones
■ Laptop computers
0144T
MF-LR Series - PTC Resettable Fuses
Electrical Characteristics
1 Hour (R )
1
Tripped
Power
Dissipation
I
I
hold
trip
Initial
Resistance
Ohms
Max. Time
To Trip
Amperes Seconds
Post-Trip
Resistance
Ohms
Model
V max.
Volts
I max.
Amps
Amperes
At 23 °C
Watts
At 23 °C
At 23 °C
At 23 °C At 23 °C At 23 °C
Hold
1.90
1.90
2.60
2.60
3.80
4.50
5.50
6.00
7.30
7.30
9.00
Trip
3.90
3.90
5.80
5.80
8.30
8.90
10.50
11.70
14.10
14.10
16.70
Min.
Max.
0.072
0.072
0.042
0.042
0.026
0.020
0.019
0.014
0.012
0.012
0.010
Max.
Typ.
1.2
1.2
1.3
2.5
2.5
1.4
1.4
2.8
3.0
3.0
3.0
MF-LR190
MF-LR190S
MF-LR260
MF-LR260S
MF-LR380
MF-LR450
MF-LR550
MF-LR600
MF-LR730
MF-LR730/20*
MF-LR900/20*
15
15
15
15
15
20
20
10
10
20
20
100
100
100
100
100
100
100
100
100
100
100
0.039
0.039
0.020
0.020
0.013
0.011
0.009
0.007
0.006
0.006
0.006
0.102
0.102
0.063
0.063
0.037
0.028
0.022
0.016
0.015
0.015
0.014
9.5
9.5
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
13.0
13.0
19.0
22.5
27.5
30.0
30.0
30.0
45.0
* TÜV recognition pending.
Environmental Characteristics
Operating/Storage Temperature ........................-40 °C to +85 °C
Maximum Device Surface Temperature
in Tripped State ................................................125 °C
Passive Aging......................................................+70 °C, 1000 hours .................................... 10 ꢀ typical resistance change
Humidity Aging....................................................+85 °C, 85 ꢀ R.H. 7 days .......................... 10 ꢀ typical resistance change
Vibration..............................................................MIL-STD-883C, Condition A ......................No change
Test Procedures And Requirements For Model MF-LR 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
2.8
2.8
3.8
3.8
5.5
6.5
8.0
8.7
-20 °C
2.5
2.5
3.4
3.4
4.9
5.8
7.1
7.8
0 °C
2.3
2.3
3.1
3.1
4.4
5.3
6.2
7.1
8.6
8.6
10.0
23 °C
1.9
1.9
2.6
2.6
3.8
4.5
5.5
6.0
7.3
7.3
9.0
40 °C
1.6
1.6
2.2
2.2
3.3
3.9
4.7
5.2
7.4
7.4
7.5
50 °C
1.5
1.5
2.0
2.0
3.0
3.6
4.3
4.7
6.8
6.8
6.8
60 °C
1.4
1.4
1.9
1.9
2.8
3.3
4.0
4.4
6.2
6.2
6.2
70 °C
1.2
1.2
1.7
1.7
2.5
2.9
3.6
3.9
5.5
5.5
5.5
85 °C
1.0
1.0
1.4
1.4
2.1
2.5
3.0
3.3
4.5
4.5
4.5
MF-LR190
MF-LR190S
MF-LR260
MF-LR260S
MF-LR380
MF-LR450
MF-LR550
MF-LR600
MF-LR730
MF-LR730/20
MF-LR900/20
10.5
10.5
12.7
9.5
9.5
11.4
*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.
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