C
O
LO & MP
LI
GE
AN
N
T
FR
EE
Features
The MF-RX Series is currently
available, although not recommended
for new designs. The higher voltage
rated MF-RX/72 Series is preferred.
*R
oH
S
n Radial Leaded Devices
n Cured, flame retardant epoxy polymer
insulating material meets UL 94V-0
requirements
n Agency recognition:
n RoHS compliant* and halogen free**
*R
oH
S
C
OM
PL
IA
N
T
**
HA
RX
1
718 10
0T
MF-RX Series - PTC Resettable Fuses
Electrical Characteristics
MF-RX110
MF-RX135
MF-RX160
MF-RX185
MF-RX250
MF-RX300
MF-RX375
60
60
60
60
60
60
60
40
40
40
40
40
40
40
Amperes
at 23 °C
Hold
1.10
1.35
1.60
1.85
2.50
3.00
3.75
Trip
2.20
2.70
3.20
3.70
5.00
6.00
7.50
Tripped
Power
Dissipation
Initial
Resistance
1 Hour (R1)
Post-Trip
Resistance
Ohms
at 23 °C
Ohms
at 23 °C
Amperes
at 23 °C
Seconds
at 23 °C
Watts
at 23 °C
Max.
0.38
0.30
0.22
0.19
0.13
0.10
0.08
5.5
6.75
8.0
9.25
12.5
15.0
18.75
8.2
9.6
11.4
12.6
15.6
19.8
24.0
Typ.
1.50
1.70
1.90
2.10
2.50
2.80
3.20
Min.
0.15
0.12
0.09
0.08
0.05
0.04
0.03
Max.
0.25
0.19
0.14
0.12
0.08
0.06
0.05
Ro VE LEA
HS RS D
C ION FRE
OM S E
PL AR
IA E
NT
*
I max.
Amps
Itrip
F
RE
E
V max.
Volts
LE
AD
Model
Ihold
Max. Time
to Trip
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
Moisture Sensitivity Level...................................... 1
ESD Classification (HBM)..................................... 6
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......................................................E174545
http://www.ul.com/ Follow link to Online Certificates Directory, then enter UL File No.
E174545, or click here
TÜV Certificate.......................................................Certificate Number Available on Request, or click here
Thermal Derating Chart - Ihold / Itrip (Amps)
Model
MF-RX110
MF-RX135
MF-RX160
MF-RX185
MF-RX250
MF-RX300
MF-RX375
Ambient Operating Temperature
-40 ºC
1.71 / 3.42
2.09 / 4.18
2.48 / 4.96
2.87 / 5.74
3.88 / 7.76
4.65 / 9.30
5.81 / 11.6
-20 ºC
1.50 / 3.00
1.84 / 3.68
2.18 / 4.36
2.52 / 5.04
3.40 / 6.80
4.08 / 8.16
5.10 / 10.2
0 ºC
1.31 / 2.62
1.61 / 3.22
1.90 / 3.80
2.20 / 4.40
2.98 / 5.96
3.57 / 7.14
4.46 / 8.92
23 ºC
1.10 / 2.20
1.35 / 2.70
1.60 / 3.20
1.85 / 3.70
2.50 / 5.00
3.00 / 6.00
3.75 / 7.50
40 ºC
0.89 / 1.78
1.09 / 2.18
1.30 / 2.60
1.50 / 3.00
2.03 / 4.06
2.43 / 4.86
3.04 / 6.08
50 ºC
0.79 / 1.58
0.97 / 1.94
1.15 / 2.30
1.33 / 2.66
1.80 / 3.60
2.16 / 4.32
2.70 / 5.40
60 ºC
0.69 / 1.38
0.85 / 1.70
1.01 / 2.02
1.17 / 2.34
1.58 / 3.16
1.89 / 3.78
2.36 / 4.72
70 ºC
0.59 / 1.18
0.73 / 1.46
0.86 / 1.72
1.00 / 2.00
1.35 / 2.70
1.62 / 3.24
2.03 / 4.06
85 ºC
0.44 / 0.88
0.54 / 1.08
0.64 / 1.28
0.74 / 1.48
1.00 / 2.00
1.20 / 2.40
1.50 / 3.00
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
** Bourns follows the prevailing definition of “halogen free” in the industry. Bourns considers a product to be “halogen free” if (a) the Bromine (Br) content is 900 ppm or less;
(b) the Chlorine (Cl) content is 900 ppm or less; and (c) the total Bromine (Br) and Chlorine (Cl) content is 1500 ppm or less.
Specifications 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 specific applications.
Additional Features
Applications
n Bulk packaging, tape and reel and Ammo-
Almost anywhere there is a low voltage power
supply, up to 60 V and a load to be protected,
including:
n Security and fire alarm systems
n Loud speakers
n Power transformers
Pak available on most models
n Resettable circuit protection
MF-RX Series - PTC Resettable Fuses
Product Dimensions
C
A B
D E Physical Characteristics
Model
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
Package 1
Typical Time to Trip at 23 ˚C
How to Order
E
MF - RX 110 - 0 - 99
Multifuse®
Product Designator
B
Series
RX = Radial Leaded Component
NOTE: Kinked lead option is available for
board standoff. Contact factory for details.
Typical Part Marking
Represents total content. Layout may vary.
DATE CODE
(FIRST DIGIT =
LAST DIGIT OF YEAR;
NEXT THREE DIGITS =
DAY OF YEAR)
MANUFACTURER'S
TRADEMARK
7180T
LOT NO.
(T = TAIWAN
S = CHINA)
Packaging Options
- __ =
Bulk Packaging without part
number suffix option
- 0-99 = Bulk Packaging with part
number suffix option
- 2 =
Tape and Reel without part
number suffix option*
- 2-99 = Tape and Reel with part number
suffix option*
- AP = Ammo-Pak*
- 0-14 = Kinked leads where straight
leads are standard
- 0-17 = Straight leads where kinked
leads are standard
Part Number Suffix Option
- 99 =
RoHS Compliancy
As of date code April 1, 2005 all
MF-RX models are RoHS compliant.
The suffix “-99” can be used if a new
part number is required to reference
the RoHS compliance, but including
the “-99” suffix option is not
recommended for new designs.
100
Time to Trip (Seconds)
C
RX110
1000
Hold Current, Ihold
110-375 (1.10 Amps - 3.75 Amps)
D
PART
IDENTIFICATION
MF
-R
MF X110
-R
MF X135
-R
MF X160
-R
MF X185
-RX
MF 250
-R
MF X300
-RX
375
A
0.81 (20AWG)
10
1
0.1
0.01
0.001
1
10
100
Fault Current (Amps)
*Packaged per EIA486-B
MF-RX SERIES, REV. S, 10/17
Specifications 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 specific applications.
MF-R, MF-R/90, MF-R/600, & MF-RX, & MF-RX/72 Series
Tape and Reel Specifications
Devices taped using EIA468–B/IEC286-2 standards. See table below and Figures 1 and 2 for details.
Dimension Description
EIA
Dimensions
Mark
Dimensions
Tolerance
18 -0.5/+1.0
Carrier tape width
W W
(.709) (-0.02/+.039)
11
Hold down tape width
W4
min.
W0
(.433)
Hold down tape
IEC
Mark
No protrusion
3
Top distance between tape edges
W2 W6
max.
(.118)
9 -0.5/+0.75
Sprocket hole position
W1 W5
(.354)
(-0.02/+0.03)
4 ±0.2
Sprocket hole diameter
D0 D0
(.157) (±.0078)
18.5 ±3.0
Abscissa to plane (straight lead)
H H
(.728) (±.118)
16 ±0.5
Abscissa to plane (kinked lead)
H0 H0
(.63) (±.02)
38.0
Abscissa to top (straight lead)
H1 H1
max.
(1.496)
32.2
Abscissa to top (kinked lead)
H1 H1
max.
(1.268)
55.0
Overall width w/lead protrusion (straight lead)
C1
max.
(2.165)
43.2
Overall width w/lead protrusion (kinked lead)
C1
max.
(1.7)
54.0
Overall width w/o lead protrusion (straight lead)
C2
max.
(2.126)
42.5
Overall width w/o lead protrusion (kinked lead)
C2
max.
(1.673)
1.0
Lead protrusion
I1 L1
max.
(.039)
11
Protrusion of cutout
L L
max.
(.433)
Protrusion beyond hold-down tape
I2 I2
Not specified
12.7 ±0.3
(0.5) (±.012)
±1
Pitch tolerance
20 consecutive
(±.039)
Sprocket hole pitch
P0 P0
Device pitch: MF-R005–MF-R160, MF-R/90,
12.7 ±0.3
MF-RX020/72–MF-RX030/72
(0.5) (±.012)
Device pitch: MF-R185–MF-R400, MF-R/600, MF-RX110–MF-RX375
25.4 ±0.6
MF-RX040/72–MF-RX375/72
(1.0) (±.024)
0.9
Tape thickness
t t
max.
(.035)
Tape thickness with splice: MF-R010–MF-R160,
t1
1.5
max.
MF-RX110/72–MF-RX185/72 (.059)
Tape thickness with splice: MF-R250–MF-R1100,
t1
2.3
max.
MF-RX110–MF-RX375, MF-R/90, MF-RX250/72-MF-RX375/72
(.091)
±0.3
Splice sprocket hole alignment
0
(±.012)
±1.0
Body lateral deviation
Δh
Δh 0
(±.039)
±1.3
Body tape plane deviation
Δp
Δp 0
(±.051)
MM
DIMENSIONS:
(INCHES)
Specifications 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 specific applications.
MF-R, MF-R/90, MF-R/600, MF-RX, & MF-RX/72 Series
Tape and Reel Specifications
Dimension Description
IEC
Mark
EIA
Dimensions
Mark
Dimensions
Tolerance
5.08 ±0.2
Lead spacing: MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72
F F
(0.2) (±0.008)
56.0
Reel width
w W2
max.
(2.205)
370.0
Reel diameter
d a
max.
(14.57)
4.75 ±3.25
Space between flanges less device
W1
h
(.187) (±.128)
26.0 ±12.0
Arbor hole diameter
f
c
(1.024) (±.472)
80
Core diameter: MF-R, MF-RX, MF-R/90
h n
max.
(3.15)
91
Core diameter: MF-R/600
h n
max.
(3.58)
62 355 345
Box: MF-R, MF-RX, MF-R/90
nom.
(2.44) (14.0) (13.6)
64 372 362
Box: MF-R/600
max.
(2.52) (14.6) (14.25)
p
h
h MF-R, MF-RX,
Consecutive missing places:
MF-R/90
Consecutive missing places: MF-R/600
Empty places per reel: MF-R, MF-RX, MF-R/90
P1
H1
Reference plane
L
Taped Component Dimensions Figure 1
H0
B
Not specified
H1
H
0.1 %
W1
W0
W
p
h
h
I2
P0
I1
A
I1
B
P0
H0
W0
D0
p
User direction of feed
Cross section A - B
H1
H
F
L
I2
D0
Reference plane
P1
H1
max.
none
F
Empty places per reel: MF-R/600
A
p
3
W1
t
W
User direction of feed
Cross section A - B
Reel Dimensions - Figure 2
t
Reel
Upper side
Tape
h
d
User
direction
of
feed
Lower side
f
h
w
Reel
MM
DIMENSIONS:
(INCHES)
Upper side
h
Tape
Specifications are subject to change without notice.
User
The device characteristics and parameters in this data sheet can and do vary in differentdirection
applications and actual device performance may vary over time.
d
Users should verify actual device performance in their specific applications.
of
feed
Lower side
