Features
■ Axial leaded
■ Fully compatible with current industry
standards
■ Weldable nickel terminals
■ Very low internal resistance
■ Agency recognition:
■ RoHS compliant*
Applications
■ Rechargeable battery pack protection
■ Provides overcurrent protection with
125 °C trip temperature
MF-S 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.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users 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 ....................................................... +85 °C, 1000 hours ............................................... ±5 % typical resistance change
Humidity Aging...................................................... +85 °C, 85% R.H. 7 days ...................................... ±5 % typical resistance change
Vibration ............................................................... MIL-STD-883C, Method 2007.1, ........................... No change
Condition A
Test Procedures And Requirements For Model MF-S 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
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-S120 15 100 1.20 2.70 0.085 0.160 0.220 6 5.0 1.20
MF-S150 15 100 1.50 3.00 0.050 0.090 0.113 8 5.0 1.30
MF-S175 15 100 1.75 3.80 0.050 0.090 0.120 9 4.0 1.50
MF-S200 30 100 2.00 4.40 0.030 0.060 0.080 10 4.0 1.90
MF-S350 30 100 3.50 6.30 0.017 0.031 0.040 20 3.0 2.50
MF-S420 30 100 4.20 7.60 0.012 0.024 0.040 20 6.0 2.90
Thermal Derating Chart - Ihold/ Itrip (Amps)
Model Ambient Operating Temperature
-40 ºC -20 ºC 0 ºC 23 ºC 40 ºC 50 ºC 60 ºC 70 ºC 85 ºC
MF-S120 1.90 / 4.28 1.70 / 3.83 1.50 / 3.38 1.20 / 2.70 1.00 / 2.25 0.90 / 2.03 0.80 / 1.80 0.70 / 1.58 0.50 / 1.13
MF-S120S 1.90 / 4.28 1.70 / 3.83 1.50 / 3.38 1.20 / 2.70 1.00 / 2.25 0.90 / 2.03 0.80 / 1.80 0.70 / 1.58 0.50 / 1.13
MF-S150 2.20 / 4.40 2.00 / 4.00 1.80 / 3.60 1.50 / 3.00 1.30 / 2.60 1.10 / 2.20 1.00 / 2.00 0.90 / 1.80 0.70 / 1.40
MF-S175 2.50 / 5.59 2.30 / 5.14 2.00 / 4.47 1.70 / 3.80 1.50 / 3.35 1.30 / 2.91 1.20 / 2.68 1.10 / 2.46 0.90 / 2.01
MF-S175S 2.50 / 5.59 2.30 / 5.14 2.00 / 4.47 1.70 / 3.80 1.50 / 3.35 1.30 / 2.91 1.20 / 2.68 1.10 / 2.46 0.90 / 2.01
MF-S200 3.20 / 7.04 2.80 / 6.16 2.50 / 5.50 2.00 / 4.40 1.70 / 3.74 1.60 / 3.52 1.40 / 3.08 1.20 / 2.64 0.90 / 1.98
MF-S350 5.40 / 9.72 4.80 / 8.64 4.30 / 7.74 3.50 / 6.30 3.00 / 5.40 2.80 / 5.04 2.50 / 4.50 2.20 / 3.96 1.70 / 3.06
MF-S420 6.40 / 11.5 5.70 / 10.3 5.10 / 9.23 4.20 / 7.60 3.60 / 6.51 3.30 / 5.97 3.00 / 5.43 2.60 / 4.70 2.10 / 3.80
S350
0144T
0.01
0.001
1 10 100
0.1
1
10
Fault Current (Amps)
Time to Trip (Seconds)
MF-S120
MF-S150
MF-S350
MF-S420
MF-S175
MF-S200
Specifi cations are subject to change without notice.
The device characteristics and parameters in this data
sheet can and do vary in different applications and
actual device performance may vary over time.
Users should verify actual device performance in their
specifi c applications.
MF-S Series - PTC Resettable Fuses
Product Dimensions
Model ABC D F
Min. Max. Min. Max. Min. Max. Min. Max. Min. Max.
MF-S120 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)
3.8
(0.150)
4.1
(0.161)
MF-S150 21.3
(0.839)
23.4
(0.921)
10.2
(0.402)
11.0
(0.433)
0.5
(0.020)
1.1
(0.043)
4.1
(0.161)
5.5
(0.217)
4.8
(0.189)
5.4
(0.213)
MF-S175 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)
3.8
(0.150)
4.1
(0.161)
MF-S200 21.3
(0.839)
23.4
(0.921)
10.2
(0.402)
11.0
(0.433)
0.5
(0.020)
1.1
(0.043)
5.0
(0.197)
7.6
(0.299)
4.8
(0.189)
5.4
(0.213)
MF-S350 28.4
(1.119)
31.8
(1.252)
13.0
(0.512)
13.5
(0.531)
0.5
(0.020)
1.1
(0.043)
6.3
(0.248)
8.9
(0.350)
6.0
(0.236)
6.6
(0.260)
MF-S420 30.6
(1.205)
32.4
(1.276)
12.9
(0.508)
13.6
(0.535)
0.5
(0.020)
1.1
(0.043)
5.0
(0.197)
7.5
(0.295)
6.0
(0.236)
6.6
(0.260)
Packaging: Bulk - 500 pcs. per bag. Tape and Reel - Consult factory. DIMENSIONS: MM
(INCHES)
Terminal material: quarter-hard nickel
F
B
D D
C
A
Typical Part Marking
Represents total content. Layout may vary.
MANUFACTURER'S
TRADEMARK PART
IDENTIFICATION
LOT NO.
(T = TAIWAN
S = CHINA)
S120
0180T
DATE CODE
(FIRST DIGIT =
LAST DIGIT OF YEAR;
NEXT THREE DIGITS =
DAY OF YEAR)
Typical Time to Trip at 23 ˚C
How to Order
MF - S 120
Multifuse® Product
Designator
Series
S = Axial Leaded “Strap”
Component
Hold Current, Ihold
120-420 (1.20 Amps - 4.20 Amps)
MF-S, REV. O 10/14
