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. 1000 hours ........................ ±5 % typical resistance change
Thermal Shock ................................................ -40 °C to +85 °C, 10 times .............................. ±10 % typical resistance change
Solvent Resistance .......................................... MIL-STD-202, Method 215 .............................. No change
Vibration .......................................................... MIL-STD-883C, Method 2007.1, ..................... No change
Condition A
Test Procedures And Requirements For Model MF-RX 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 ≤ Rmax
Time to Trip ...................................................... 5 times Ihold, 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-RX110 60 40 1.10 2.20 0.15 0.25 0.38 5.5 8.2 1.50
MF-RX135 60 40 1.35 2.70 0.12 0.19 0.30 6.75 9.6 1.70
MF-RX160 60 40 1.60 3.20 0.09 0.14 0.22 8.0 11.4 1.90
MF-RX185 60 40 1.85 3.70 0.08 0.12 0.19 9.25 12.6 2.10
MF-RX250 60 40 2.50 5.00 0.05 0.08 0.13 12.5 15.6 2.50
MF-RX300 60 40 3.00 6.00 0.04 0.06 0.10 15.0 19.8 2.80
MF-RX375 60 40 3.75 7.50 0.03 0.05 0.08 18.75 24.0 3.20
Features
■ Radial Leaded Devices
■ Cured, fl ame retardant epoxy polymer
insulating material meets UL 94V-0
requirements
■ Agency recognition:
■ RoHS compliant*
MF-RX Series - PTC Resettable Fuses
*RoHS Directive 2002/95/EC Jan 27, 2003 including Annex.
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
*RoHS COMPLIANT
X110
0180T
R
The MF-RX Series is currently
available, although not recommended
for new designs. The higher voltage
rated MF-RX/72 Series is preferred.
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-RX110 1.71 / 3.42 1.50 / 3.00 1.31 / 2.62 1.10 / 2.20 0.89 / 1.78 0.79 / 1.58 0.69 / 1.38 0.59 / 1.18 0.44 / 0.88
MF-RX135 2.09 / 4.18 1.84 / 3.68 1.61 / 3.22 1.35 / 2.70 1.09 / 2.18 0.97 / 1.94 0.85 / 1.70 0.73 / 1.46 0.54 / 1.08
MF-RX160 2.48 / 4.96 2.18 / 4.36 1.90 / 3.80 1.60 / 3.20 1.30 / 2.60 1.15 / 2.30 1.01 / 2.02 0.86 / 1.72 0.64 / 1.28
MF-RX185 2.87 / 5.74 2.52 / 5.04 2.20 / 4.40 1.85 / 3.70 1.50 / 3.00 1.33 / 2.66 1.17 / 2.34 1.00 / 2.00 0.74 / 1.48
MF-RX250 3.88 / 7.76 3.40 / 6.80 2.98 / 5.96 2.50 / 5.00 2.03 / 4.06 1.80 / 3.60 1.58 / 3.16 1.35 / 2.70 1.00 / 2.00
MF-RX300 4.65 / 9.30 4.08 / 8.16 3.57 / 7.14 3.00 / 6.00 2.43 / 4.86 2.16 / 4.32 1.89 / 3.78 1.62 / 3.24 1.20 / 2.40
MF-RX375 5.81 / 11.6 5.10 / 10.2 4.46 / 8.92 3.75 / 7.50 3.04 / 6.08 2.70 / 5.40 2.36 / 4.72 2.03 / 4.06 1.50 / 3.00
MF-RX Series - PTC Resettable Fuses
Product Dimensions
MF-RX SERIES, REV. M, 05/11
Additional Features
■ Bulk packaging, tape and reel and Ammo-
Pak available on most models
■ Resettable circuit protection
Applications
Almost anywhere there is a low voltage power
supply, up to 60 V and a load to be protected,
including:
■ Security and fi re alarm systems
■ Loud speakers
■ Power transformers
Model A B C D E Physical Characteristics
Max. Max. Nom. Tol. ± Min. Max. Style Lead Dia. Material
MF-RX110 13.0 18.0 5.1 0.7 7.6 3.1
1 0.81
Sn/Cu
(0.512) (0.709) (0.201) (0.028) (0.299) (0.122) (0.032)
MF-RX135 14.5 19.6 5.1 0.7 7.6 3.1
1 0.81
Sn/Cu
(0.571) (0.772) (0.201) (0.028) (0.299) (0.122) (0.032)
MF-RX160 16.3 21.3 5.1 0.7 7.6 3.1
1 0.81
Sn/Cu
(0.642) (0.839) (0.201) (0.028) (0.299) (0.122) (0.032)
MF-RX185 17.8 22.9 5.1 0.7 7.6 3.1
1 0.81
Sn/Cu
(0.701) (0.902) (0.201) (0.028) (0.299) (0.122) (0.032)
MF-RX250 21.3 26.4 10.2 0.7 7.6 3.1
1 0.81
Sn/Cu
(0.839) (1.039) (0.402) (0.028) (0.299) (0.122) (0.032)
MF-RX300 24.9 30.0 10.2 0.7 7.6 3.1
1 0.81
Sn/Cu
(0.980) (1.181) (0.402) (0.028) (0.299) (0.122) (0.032)
MF-RX375 28.4 33.5 10.2 0.7 7.6 3.1
1 0.81
Sn/Cu
(1.118) (1.319) (0.402) (0.028) (0.299) (0.122) (0.032)
Packaging options:
BULK: All models = 500 pcs. per bag.
TAPE & REEL: MF-RX110 – MF-RX160 = 1500 pcs. per reel; MF-RX185 – MF-RX375 = 1000 pcs. per reel
AMMO-PACK: MF-RX110 – MF-RX160 = 1000 pcs. per reel; MF-RX185 – MF-RX375 = 500 pcs. per reel
0.81 (20AWG)
AE
B
D
C
NOTE: Kinked lead option is available for
board standoff. Contact factory for details.
Typical Part Marking
Represents total content. Layout may vary.
RX110
0180T
MANUFACTURER'S
TRADEMARK
PART
IDENTIFICATION
LOT NO.
(T = TAIWAN
S = CHINA)
DATE CODE
(FIRST DIGIT =
LAST DIGIT OF YEAR;
NEXT THREE DIGITS =
DAY OF YEAR)
How to Order
MF - RX 110 - 0 - 99
Multifuse®
Product Designator
Series
RX = Radial Leaded Component
Hold Current, Ihold
110-375 (1.10 Amps - 3.75 Amps)
Packaging Options
- __ = Bulk Packaging without part
number suffi x option
- 0-99 = Bulk Packaging with part
number suffi x option
- 2 = Tape and Reel without part
number suffi x option*
- 2-99 = Tape and Reel with part number
suffi x option
- AP = Ammo-Pak*
- 0-14 = Kinked leads where straight
leads are standard
- 0-17 = Straight leads where kinked
leads are standard
Part Number Suffi x Option
- 99 = As of date code April 1, 2005 all
MF-RX models are RoHS
compliant. The suffi x “-99”
can be used if a new part
number is required to reference
the RoHS compliance.
Examples:
MF-RX110 ...............Bulk packaging
MF-RX110-0-99 ......Bulk packaging
with part number
suffi x option
MF-RX110-2 ............Tape and reel
packaging
MF-RX110-2-99 ......Tape and reel
packaging with
part number
suffi x option
*Packaged per EIA486-B
Typical Time to Trip at 23 ˚C
0.01
0.001
1 10 100
0.1
1
10
100
1000
Fault Current (Amps)
Time to Trip (Seconds)
MF-RX110
MF-RX135
MF-RX160
MF-RX185
MF-RX250
MF-RX300
MF-RX375
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
MF-RX Series - PTC Resettable Fuses
IEC EIA Dimensions
Dimension Description Mark Mark Dimensions Tolerance
Carrier tape width W W 18 -0.5/+1.0
(.709) (-0.02/+.039)
Hold down tape width W4 11
min.
W0 (.433)
Hold down tape No protrusion
Top distance between tape edges W2 W
6 3
max.
(.118)
Sprocket hole position W1 W
5 9 -0.5/+0.75
(.354) (-0.02/+0.03)
Sprocket hole diameter D0 D
0 4 ±0.2
(.157) (±.0078)
Abscissa to plane (straight lead) H H 18.5 ±3.0
(.728) (±.118)
Abscissa to plane (kinked lead) H0 H
0 16 ±0.5
(.63) (±.02)
Abscissa to top (straight lead) H1 H
1 38.0
max.
(1.496)
Abscissa to top (kinked lead) H1 H
1 32.2
max.
(1.268)
Overall width w/lead protrusion (straight lead) C1 55.0
max.
(2.165)
Overall width w/lead protrusion (kinked lead) C1 43.2
max.
(1.7)
Overall width w/o lead protrusion (straight lead) C2 54.0
max.
(2.126)
Overall width w/o lead protrusion (kinked lead) C2 42.5
max.
(1.673)
Lead protrusion I1 L
1 1.0
max.
(.039)
Protrusion of cutout L L 11
max.
(.433)
Protrusion beyond hold-down tape I2 I
2 Not specifi ed
Sprocket hole pitch P0 P
0 12.7 ±0.3
(0.5) (±.012)
Pitch tolerance 20 consecutive ±1
(±.039)
Device pitch: MF-R005–MF-R160, MF-R/90,
MF-RX110/72–MF-RX185/72
12.7 ±0.3
(0.5) (±.012)
Device pitch: MF-R185–MF-R400, MF-RX110–MF-RX375
MF-R/600, MF-RX250/72–MF-RX375/72
25.4 ±0.6
(1.0) (±.024)
Tape thickness t t 0.9
max.
(.035)
Tape thickness with splice: MF-R010–MF-R160, t1
max.
MF-RX110/72–MF-RX185/72
1.5
(.059)
Tape thickness with splice: MF-R250–MF-R1100, t1
max.
MF-RX110–MF-RX375, MF-R/90, MF-RX250/72-MF-RX375/72 2.3
(.091)
Splice sprocket hole alignment
0 ±0.3
(±.012)
Body lateral deviation Δh Δh 0
±1.0
(±.039)
Body tape plane deviation Δp Δp 0
±1.3
(±.051)
MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 & MF-RX/250 Series
Tape and Reel Specifi cations
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Devices taped using EIA468–B/IEC286-2 standards. See table below and Figures 1 and 2 for details.
DIMENSIONS: MM
(INCHES)
h
w
h
f
d
Reel
Upper side
Tape
Lower side
User
direction
of
feed
t
User direction of feed
Cross section A - B
pp
H
H1
Reference plane
W0
H0W1
W
AB
F
D0
P0
I1
I2
L
H1
P1
h
h
IEC EIA Dimensions
Dimension Description Mark Mark Dimensions Tolerance
Lead spacing: MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 F F 5.08 ±0.2
(0.2) (±0.008)
Lead spacing: MF-RX/250 F F 5.08 -0.5/+0.6
(0.2) (-.020/+.024)
Reel width w W2 56.0
max.
(2.205)
Reel diameter d a 370.0
max.
(14.57)
Space between fl anges less device 4.75 ±3.25
W1 h (.187) (±.128)
Arbor hole diameter f c 26.0 ±12.0
(1.024) (±.472)
Core diameter: MF-R, MF-RX, MF-R/90 h n 80
max.
(3.15)
Core diameter: MF-RX/250, MF-R/600 h n 91
max.
(3.58)
Box: MF-R, MF-RX, MF-R/90 56 372 372
max.
(2.2) (14.6) (14.6)
Box: MF-RX/250 67 372 362
max.
(2.64) (14.6) (14.25)
Box: MF-R/600 64 372 362
max.
(2.52) (14.6) (14.25)
Consecutive missing places: MF-R, MF-RX, MF-R/90 3 max.
Consecutive missing places: MF-RX/250, MF-R/600 none
Empty places per reel: MF-R, MF-RX, MF-R/90 Not specifi ed
Empty places per reel: MF-RX/250, MF-R/600 0.1 %
Specifi cations are subject to change without notice.
Customers should verify actual device performance in their specifi c applications.
Taped Component Dimensions - Figure 1
DIMENSIONS: MM
(INCHES)
MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 & MF-RX/250 Series
Tape and Reel Specifi cations
Reel Dimensions - Figure 2
