■ Agency recognition:
Features
■ Axial leaded
Applications
Any application that requires protection at low
resistances:
■ Rechargeable battery pack protection
■ Cellular phones
■ Laptop computers
■ Fully compatible with current industry
standards
■ Weldable nickel terminals
■ Very low internal resistance
■ Operating currents to 9.0 amps
■ RoHS compliant*
0144T
MF-LR Series - PTC Resettable Fuses
Electrical Characteristics
1 Hour (R )
1
Tripped Power
Dissipation
Initial
Max. Time
to Trip
Post-Trip
I
I
trip
hold
Resistance
Resistance
V max.
Volts
I max.
Model
Amps
Amperes
at 23 °C
Ohms
Ohms
Amperes Seconds
Watts
at 23 °C
at 23 °C
at 23 °C
at 23 °C
at 23 °C
Hoꢂd
Trip
3.90
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.
0.102
0.102
0.083
0.083
0.037
0.028
0.022
0.019
0.015
0.015
0.014
Tꢁp.
1.2
1.2
1.3
1.3
2.5
1.4
1.4
2.8
3.0
3.0
3.0
MF-LR190
15
15
15
15
15
16
10
10
10
20
20
100
100
100
100
100
100
100
100
100
100
100
1.90
1.90
2.60
2.60
3.80
4.50
5.50
6.00
7.30
7.30
9.00
0.039
0.039
0.020
0.020
0.013
0.011
0.009
0.007
0.006
0.006
0.006
9.5
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
5.0
MF-LR190S
MF-LR260
3.90
9.5
5.80
13.0
13.0
19.0
22.5
27.5
30.0
30.0
30.0
45.0
MF-LR260S
MF-LR380
5.80
8.30
MF-LR450
8.90
MF-LR550
10.50
11.70
14.10
14.10
16.70
MF-LR600
MF-LR730
MF-LR730/20**
MF-LR900/20**
** TÜV recognition and UL approvaꢂ 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 ꢀ tꢁpicaꢂ resistance change
Humiditꢁ Aging...................................................... +85 °C, 85ꢀ R.H. 7 daꢁs...................................... 10 ꢀ tꢁpicaꢂ resistance change
Vibration ............................................................... MIL-STD-883C,..................................................... No change
Condition A
Test Procedures And Requirements For Model MF-LR Series
Test
Test Conditions
Accept/Reject Criteria
Visuaꢂ/Mech.......................................................... Verifꢁ dimensions and materiaꢂs........................... Per MF phꢁsicaꢂ description
Resistance............................................................ In stiꢂꢂ air @ 23 °C................................................. Rmin ≤ R ≤ R1max
Time to Trip........................................................... At specified current, Vmax, 23 °C......................... T ≤ max. time to trip (seconds)
Hoꢂd Current......................................................... 30 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
UL Fiꢂe Number .................................................... E 174545S
CSA Fiꢂe Number.................................................. CA 110338
TÜV Fiꢂe Number.................................................. R2057213
Thermal Derating Chart - I
(Amps)
hold
Ambient Operating Temperature
Model
-40 ºC
-20 ºC
0 ºC
2.3
2.3
3.1
3.1
4.4
5.3
6.2
7.1
8.6
8.6
10.0
23 ºC
1.9
1.9
2.6
2.6
3.8
4.5
5.5
6.0
7.3
7.3
9.0
40 ºC
1.6
1.6
2.2
2.2
3.3
3.9
4.7
5.2
7.4
7.4
7.5
50 ºC
1.5
1.5
2.0
2.0
3.0
3.6
4.3
4.7
6.8
6.8
6.8
60 ºC
1.4
1.4
1.9
1.9
2.8
3.3
4.0
4.4
6.2
6.2
6.2
70 ºC
1.2
1.2
1.7
1.7
2.5
2.9
3.6
3.9
5.5
5.5
5.5
85 ºC
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
2.8
2.8
2.5
2.5
3.4
3.4
4.9
5.8
7.1
7.8
9.5
9.5
11.4
3.8
3.8
5.5
6.5
8.0
8.7
10.5
10.5
12.7
I
is approximateꢂꢁ two times I .
hoꢂd
trip
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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