Features
■ Axial leaded
■ Fully compatible with current industry
standards
■ Weldable nickel terminals
■ Very low internal resistance
■ Operating currents to 9.0 amps
■ RoHS compliant*
■ Agency recognition:
Applications
Any application that requires protection at low
resistances:
■ Rechargeable battery pack protection
■ Cellular phones
■ Laptop computers
MF-LR Series - PTC Resettable Fuses
*RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
*RoHS COMPLIANT
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, ..................................................... No change
Condition A
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 specifi ed 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
Electrical Characteristics
Thermal Derating Chart - Ihold (Amps)
Model Ambient Operating Temperature
-40 ºC -20 ºC 0 ºC 23 ºC 40 ºC 50 ºC 60 ºC 70 ºC 85 ºC
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
** TÜV recognition and UL approval pending.
Model V max.
Volts
I max.
Amps
Ihold Itrip Initial
Resistance
1 Hour (R1)
Post-Trip
Resistance
Max. Time
to Trip
Tripped Power
Dissipation
Amperes
at 23 °C
Ohms
at 23 °C
Ohms
at 23 °C
Amperes
at 23 °C
Seconds
at 23 °C
Watts
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 0.083 13.0 5.0 1.3
MF-LR260S 15 100 2.60 5.80 0.020 0.042 0.083 13.0 5.0 1.3
MF-LR380 15 100 3.80 8.30 0.013 0.026 0.037 19.0 5.0 2.5
MF-LR450 16 100 4.50 8.90 0.011 0.020 0.028 22.5 5.0 1.4
MF-LR550 10 100 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 0.019 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
0144T
Itrip is approximately two times Ihold.
Product Dimensions
Model A B C D F Pkg.
Style
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
MF-LR190 19.9
(0.783)
22.1
(0.870)
4.9
(0.193)
5.2
(0.205)
0.6
(0.024)
1.0
(0.039)
5.5
(0.217)
7.5
(0.295)
3.9
(0.154)
4.1
(0.161) Std.
MF-LR190S 19.9
(0.783)
22.1
(0.870)
4.9
(0.193)
5.2
(0.205)
0.6
(0.024)
1.0
(0.039)
5.5
(0.217)
7.5
(0.295)
3.9
(0.154)
4.1
(0.161) S
MF-LR260 20.9
(0.823)
23.1
(0.909)
4.9
(0.193)
5.2
(0.205)
0.6
(0.024)
1.0
(0.039)
4.1
(0.161)
5.5
(0.217)
3.9
(0.154)
4.1
(0.161) Std.
MF-LR260S 20.9
(0.823)
23.1
(0.909)
4.9
(0.193)
5.2
(0.205)
0.6
(0.024)
1.0
(0.039)
4.1
(0.161)
5.5
(0.217)
3.9
(0.154)
4.1
(0.161) S
MF-LR380 24.0
(0.945)
26.0
(1.024)
6.9
(0.272)
7.5
(0.295)
0.6
(0.024)
1.0
(0.039)
4.1
(0.161)
5.5
(0.217)
4.9
(0.193)
5.1
(0.201) Std.
MF-LR450 24.0
(0.945)
26.0
(1.024)
9.9
(0.390)
10.5
(0.414)
0.6
(0.024)
1.0
(0.039)
5.3
(0.209)
6.7
(0.264)
5.9
(0.232)
6.1
(0.240) Std.
MF-LR550 35.0
(1.378)
37.0
(1.457)
6.9
(0.272)
7.5
(0.295)
0.6
(0.024)
1.0
(0.039)
5.3
(0.209)
6.7
(0.264)
4.9
(0.193)
5.1
(0.201) Std.
MF-LR600 24.0
(0.945)
26.0
(1.024)
13.9
(0.547)
15.9
(0.626)
0.6
(0.024)
1.0
(0.039)
4.1
(0.161)
5.5
(0.217)
5.9
(0.232)
6.1
(0.240) Std.
MF-LR730 30.0
(1.18)
29.1
(1.146)
13.9
(0.547)
15.0
(0.590)
0.6
(0.024)
1.0
(0.039)
4.1
(0.161)
5.5
(0.217)
5.9
(0.232)
6.1
(0.240) Std.
MF-LR730/20 27.1
(1.067)
29.1
(1.146)
13.9
(0.547)
14.5
(0.571)
0.6
(0.024)
1.0
(0.039)
4.1
(0.161)
5.5
(0.217)
5.9
(0.232)
6.1
(0.240) Std.
MF-LR900/20 45.4
(1.787)
47.6
(1.874)
7.9
(0.311)
8.5
(0.335)
0.6
(0.024)
1.3
(0.051)
4.6
(0.181)
9.2
(0.362)
5.9
(0.232)
6.1
(0.240) Std.
Packaging: Bulk - 500 pcs. per bag.
Tape and Reel - Consult factory. DIMENSIONS: MM
(INCHES)
Typical Part Marking
Represents total content. Layout may vary.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
MF-LR Series - PTC Resettable Fuses
F
B
D D
C
A
Standard Style
F
B
D D
A
"S" Style
C
SLIT NOMINAL
0.5
(.020)
4.0
(.157)
X
MANUFACTURER'S
TRADEMARK PART
IDENTIFICATION
LOT NO.
(T = TAIWAN
S = CHINA)
LR190
0144T
DATE CODE
(FIRST DIGIT =
LAST DIGIT OF YEAR;
NEXT THREE DIGITS =
DAY OF YEAR)
MF-LR Series - PTC Resettable Fuses
Typical Time to Trip at 23 ˚C How to Order
MF - LR 730/20 S - 0
Multifuse® Product
Designator
Series
LR = Axial Leaded “Strap”
Component
Hold Current, Ihold/Vmax*
190-900 (1.90 Amps - 9.00 Amps)
Lead Option
S = Slotted Lead Option
Packaging Options
-__ = Bulk Packaging Designator
for Models MF-LR190 through
MF-LR730
-0 = Bulk Packaging Designator
for Models MF-LR730/20 and
MF-LR900/20
-2 = Tape and Reel***
*Vmax entry applies only to Models
MF-LR730/20 & MF-LR900/20.
**Slotted Lead Option applies only to Models MF-
LR190 & MF-LR260.
***Packaged per EIA 486-B
MF-LR SERIES, REV. Q, 11/11
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
.01
1 10 100
1
10
100
Fault Current (Amps)
Time to Trip (Seconds)
MF-LR190
MF-LR260
MF-LR380
MF-LR450
MF-LR550
MF-LR600
MF-LR730 & MF-LR730/20
MF-LR900/20
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
MF-S, MF-LS, MF-LR and MF-VS Series Tape and Reel Specifications
Reel Dimensions
Taped Component Dimensions
PASTEBOARD
HOLD
PASTEBOARD
HOLD
4.0 ± 0.2
(.157 ± .008)
2.0
(.079)
RADIUS
DIA.
1.0 + 0.1/ -0
(.039 + .004/-0)
5.56 ± 0.10
(.219 ± .004)
4.0 ± 0.1
(.157 ± .004)
12.0 ± 0.1
(.472 ± .004)
48.0 ± 0.3
(1.90 ± .012)
0.2
(.008)MAX.
8.0 ± 0.2
(.315 ± .008)
13.0
(.512)
DIA.
330
(13.0)
