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MF-LR550 Datasheet(PDF) 1 Page - Bourns Electronic Solutions

Part # MF-LR550
Description  PTC Resettable Fuses
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Manufacturer  BOURNS [Bourns Electronic Solutions]
Direct Link  http://www.bourns.com
Logo BOURNS - Bourns Electronic Solutions

MF-LR550 Datasheet(HTML) 1 Page - Bourns Electronic Solutions

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*
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.
Thermal Derating Chart - Ihold (Amps)
Ambient Operating Temperature
Model
-40
°C
-20
°C0 °C
23
°C
40
°C
50
°C
60
°C
70
°C
85
°C
MF-LR190
2.8
2.5
2.3
1.9
1.6
1.5
1.4
1.2
1.0
MF-LR190S
2.8
2.5
2.3
1.9
1.6
1.5
1.4
1.2
1.0
MF-LR260
3.8
3.4
3.1
2.6
2.2
2.0
1.9
1.7
1.4
MF-LR260S
3.8
3.4
3.1
2.6
2.2
2.0
1.9
1.7
1.4
MF-LR380
5.5
4.9
4.4
3.8
3.3
3.0
2.8
2.5
2.1
MF-LR450
6.5
5.8
5.3
4.5
3.9
3.6
3.3
2.9
2.5
MF-LR550
8.0
7.1
6.2
5.5
4.7
4.3
4.0
3.6
3.0
MF-LR600
8.7
7.8
7.1
6.0
5.2
4.7
4.4
3.9
3.3
MF-LR730
10.5
9.5
8.6
7.3
7.4
6.8
6.2
5.5
4.5
MF-LR730/20
10.5
9.5
8.6
7.3
7.4
6.8
6.2
5.5
4.5
MF-LR900/20
12.7
11.4
10.0
9.0
7.5
6.8
6.2
5.5
4.5
MF-LR Series - PTC Resettable Fuses
0144T
Electrical Characteristics
Features
Axial leaded
Fully compatible with current
industry standards
Weldable nickel terminals
Very low internal resistance
Operating currents to 9.0 Amps
RoHS compliant*, lead free
Agency recognition:
Applications
Any application that requires protection
at low resistances
Rechargeable battery packs
Cellular phones
Laptop computers
Ihold
Itrip
Initial
Max. Time
Model
V max.
I max.
Resistance
To Trip
Volts
Amps
Amperes
Ohms
Ohms
Amperes
Seconds
Watts
At 23
°C
At 23
°C
At 23
°C
At 23
°C
At 23
°C
At 23
°C
Hold
Trip
Min.
Max.
Max.
Typ.
MF-LR190
15
100
1.90
3.90
0.039
0.072
0.102
9.5
5.0
1.2
MF-LR190S
15
100
1.90
3.90
0.039
0.072
0.102
9.5
5.0
1.2
MF-LR260
15
100
2.60
5.80
0.020
0.042
0.063
13.0
5.0
1.3
MF-LR260S
15
100
2.60
5.80
0.020
0.042
0.063
13.0
5.0
2.5
MF-LR380
15
100
3.80
8.30
0.013
0.026
0.037
19.0
5.0
2.5
MF-LR450
20
100
4.50
8.90
0.011
0.020
0.028
22.5
5.0
1.4
MF-LR550
20
100
5.50
10.50
0.009
0.019
0.022
27.5
5.0
1.4
MF-LR600
10
100
6.00
11.70
0.007
0.014
0.016
30.0
5.0
2.8
MF-LR730
10
100
7.30
14.10
0.006
0.012
0.015
30.0
5.0
3.0
MF-LR730/20*
20
100
7.30
14.10
0.006
0.012
0.015
30.0
5.0
3.0
MF-LR900/20*
20
100
9.00
16.70
0.006
0.010
0.014
45.0
5.0
3.0
1 Hour (R1)
Post-Trip
Resistance
Tripped
Power
Dissipation
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
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-LR Series
TV Rheinland
*Itrip is approximately two times Ihold.
* TÜV recognition pending.


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