Features
PL
IA
N
T
Applications
■
Customer Premise Equipment (CPE)
■
Central Office / Telecom Centers (CO)
■
Access equipment
■
Radial leaded devices
RX0
240012
1K
CO
M
*R
oH
S
■
Fast tripping resettable PTCs
■
Binned and sorted narrow resistance
ranges available
■
RoHS compliant*
■
Agency recognition:
MF-RX/250 Series - Telecom PTC Resettable Fuses
Electrical Characteristics
Max.
Operating
Voltage
(Vdc)
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
Max. Interrupt
Ratings
Volts
(Vrms)
Max.
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
Amps
(A)
Max.
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
3.0
10.0
10.0
Hold Current
Amps
at 23 °C
IH
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.145
0.145
0.145
0.145
0.145
0.18
0.18
Initial Resistance
Ohms
at 23 °C
Min.
4.0
7.0
5.5
6.0
6.0
8.0
7.0
6.0
3.0
3.0
4.5
5.4
3.5
0.8
0.8
Ohms
at 23 °C
Max.
8.0
9.0
7.5
10.5
9.0
10.5
12.0
10.0
6.0
5.5
6.0
7.5
6.5
2.0
2.0
One Hour
Post-Trip
Resistance
Ohms
at 23 °C
Max.
16.0
16.0
14.0
16.0
16.0
16.0
16.0
16.0
14.0
12.0
14.0
14.0
12.0
4.0
4.0
Model
MF-RX012/250
MF-RX012/250-A
MF-RX012/250-C
MF-RX012/250-F
MF-RX012/250-1
MF-RX012/250-2
MF-RX012/250-T
MF-RX012/250U
MF-RX014/250
MF-RX014/250-A
MF-RX014/250-B
MF-RX014/250-T
MF-RX014/250U
MF-RX018/250
MF-RX018/250U
“U” suffix indicates product without insulation coating.
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.............................................. ±15 % typical resistance change
.......................................................................... +60°C, 1000 hours................................................ ±15 % typical resistance change
Humidity Aging ..................................................... +85 °C, 85 % R.H. 500 hours ............................... ±15 % typical resistance change
Thermal Shock ..................................................... MIL-STD-202F, Method 107G, ............................. ±10 % typical resistance change
.......................................................................... +125 °C to -55 °C,10 times .................................. ±15 % typical resistance change
Solvent Resistance ............................................... MIL-STD-202, Method 215B ................................ No change
Lead Solerability ................................................... ANSI/J-STD-002 ................................................... >95 % coverage
Flammability ......................................................... IEC 695-2-2 .......................................................... No Flame for 60 secs.
Vibration ............................................................... MIL-STD-883C, Method 2007.1, Condition A ...... ±5 % typical resistance change
Test Procedures And Requirements For Model MF-RX/250 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
*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.
Additional Features
■
Ability to withstand AC power cross conditions
■
Assists equipment with meeting ITU-T K.20/K.21/K.45
■
Assists equipment with meeting Telcordia GR-1089-C Intrabuilding
MF-RX/250 Series - Telecom PTC Resettable Fuses
Thermal Derating Chart - Ihold (Amps)
Model
MF-RX012/250
MF-RX014/250
MF-RX018/250
Ambient Operating Temperature
-40 ºC
0.186
0.225
0.269
-20 ºC
0.165
0.199
0.240
0 ºC
0.143
0.172
0.211
23 ºC
0.120
0.145
0.180
40 ºC
0.099
0.119
0.153
50 ºC
0.088
0.106
0.138
60 ºC
0.077
0.093
0.123
70 ºC
0.066
0.080
0.109
85 ºC
0.050
0.060
0.087
Itrip is approximately two times Ihold.
Product Dimensions
A
Max.
6.5
(0.256)
6.0
(0.236)
6.5
(0.256)
6.0
(0.236)
11.0
(0.433)
10.4
(0.409)
B
Max.
11.0
(0.433)
10.0
(0.394)
11.0
(0.433)
10.0
(0.394)
13.6
(0.535)
12.6
(0.496)
C
Nom.
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
5.1 ± 0.7
(0.201 ± 0.028)
D
Min.
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
4.7
(0.185)
E
Max.
4.6
(0.181)
3.8
(0.150)
4.6
(0.181)
3.8
(0.150)
4.6
(0.181)
3.8
(0.150)
Physical Characteristics
Lead Dia.
Style
Material
0.65
1
Sn/Cu
(0.026)
0.65
2
Sn/Cu
(0.026)
0.65
1
Sn/Cu
(0.026)
0.65
2
Sn/Cu
(0.026)
0.65
1
Sn/Cu
(0.026)
0.65
2
Sn/Cu
(0.026)
DIMENSIONS:
MM
(INCHES)
Model
MF-RX012/250
MF-RX012/250U
MF-RX014/250
MF-RX014/250U
MF-RX018/250
MF-RX018/250U
Packaging options: BULK: 500 pcs. per bag.
TAPE & REEL: 1500 pcs. per reel (available binned).
Style 1
A
E
Style 2
A
E
Typical Part Marking
Represents total content. Layout may vary.
MANUFACTURER'S
TRADEMARK
DATE CODE
(FIRST DIGIT =
LAST DIGIT OF YEAR;
SECOND DIGIT = MONTH,
AS FOLLOWS:
1-9 = JAN-SEPT
X,Y,Z = OCT-DEC)
RX012
24001K
BATCH/LOCATION
(3 DIGITS = BATCH CODE;
K = KOREA
S = CHINA)
PART
IDENTIFICATION
B
B
D
C
NOTE: UNCOATED PARTS HAVE NO PART MARKING.
MARKING IS ON LABEL ONLY.
D
C
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
MF-RX/250 Series - Telecom PTC Resettable Fuses
How to Order
Typical Time to Trip at 23 ˚C
1000
MF - RX 012/250 U - A 5 - 2
Multifuse
®
Product
Designator
Series
RX = Radial Leaded
Component
Hold Current, Ihold
008-018 (0.08-0.18 Amps)
Max. Interrupt Voltage, V
250 (250 Volts)
Telecom Options
U = Uncoated (radial parts only)
Resistance Sorted
Narrow resistance ranges - see
Resistance Options chart
Resistance Bins of 0.5 ohms
05 = 0.5 ohm binned parts (epoxy coated)
5 = 0.5 ohm binned parts (uncoated)
Packaging Options
- 0 = Bulk Packaging
- 2 = Tape and Reel* (available with binned
option)
*Packaged per EIA486-B
100
Time to Trip (Seconds)
10
1
MF-RX018/250, MF-RX018/250U
0.10
MF-RX014/250 & MF-RX014/250U
MF-RX012/250 & MF-RX012/250U
0.01
0
0.2 0.4
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0 2.2
2.4
2.6
2.8 3.0
Fault Current (Amps)
Resistance Options
Initial Resistance
Values
Model
Ohms @ 23 ° C
Min.
MF-RX012/250
MF-RX012/250-A05
MF-RX012/250-C05
MF-RX012/250-F05
MF-RX012/250-105
MF-RX012/250-205
MF-RX012/250-T05
MF-RX012/250U
MF-RX014/250
MF-RX014/250-A05
MF-RX014/250-B05
MF-RX014/250U
4.0
7.0
5.5
6.0
6.0
8.0
7.0
6.0
3.0
3.0
4.5
3.5
Max.
8.0
9.0
7.5
10.5
9.0
10.5
12.0
10.0
6.0
5.5
6.0
6.5
R1max
Ohms @ 23 ° C
Max.
16.0
16.0
14.0
16.0
16.0
16.0
16.0
16.0
14.0
12.0
14.0
12.0
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
0.5
Bin
MF-RX/250, REV. J, 05/11
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 & MF-RX/250 Series
Tape and Reel Specifications
Devices taped using EIA468–B/IEC286-2 standards. See table below and Figures 1 and 2 for details.
IEC
Mark
W
W0
EIA
Mark
W
W4
Dimensions
Dimensions
Tolerance
18
-0.5/+1.0
(.709)
(-0.02/+.039)
11
min.
(.433)
No protrusion
W2
W1
D0
H
H0
H1
H1
W6
W5
D0
H
H0
H1
H1
C1
C1
C2
C2
I1
L
I2
P0
L1
L
I2
P0
3
(.118)
9
(.354)
4
(.157)
18.5
(.728)
16
(.63)
38.0
(1.496)
32.2
(1.268)
55.0
(2.165)
43.2
(1.7)
54.0
(2.126)
42.5
(1.673)
1.0
(.039)
11
(.433)
Not specified
12.7
(0.5)
20 consecutive
12.7
(0.5)
25.4
(1.0)
t
t
t1
t1
0.9
(.035)
1.5
(.059)
2.3
(.091)
0
Δ
h
Δ
p
Δ
h
Δ
p
0
0
±0.3
(±.012)
±1
(±.039)
±0.3
(±.012)
±0.6
(±.024)
max.
max.
max.
-0.5/+0.75
(-0.02/+0.03)
±0.2
(±.0078)
±3.0
(±.118)
±0.5
(±.02)
max.
max.
max.
max.
max.
max.
max.
max.
Dimension Description
Carrier tape width
Hold down tape width
Hold down tape
Top distance between tape edges
Sprocket hole position
Sprocket hole diameter
Abscissa to plane (straight lead)
Abscissa to plane (kinked lead)
Abscissa to top (straight lead)
Abscissa to top (kinked lead)
Overall width w/lead protrusion (straight lead)
Overall width w/lead protrusion (kinked lead)
Overall width w/o lead protrusion (straight lead)
Overall width w/o lead protrusion (kinked lead)
Lead protrusion
Protrusion of cutout
Protrusion beyond hold-down tape
Sprocket hole pitch
Pitch tolerance
Device pitch: MF-R005–MF-R160, MF-R/90,
MF-RX110/72–MF-RX185/72
Device pitch: MF-R185–MF-R400, MF-RX110–MF-RX375
MF-R/600, MF-RX250/72–MF-RX375/72
Tape thickness
Tape thickness with splice: MF-R010–MF-R160,
MF-RX110/72–MF-RX185/72
Tape thickness with splice: MF-R250–MF-R1100,
MF-RX110–MF-RX375, MF-R/90, MF-RX250/72-MF-RX375/72
Splice sprocket hole alignment
Body lateral deviation
Body tape plane deviation
max.
±0.3
(±.012)
±1.0
(±.039)
±1.3
(±.051)
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
DIMENSIONS:
MM
(INCHES)
MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72 & MF-RX/250 Series
Tape and Reel Specifications
IEC
Mark
F
F
w
d
W1
f
h
h
EIA
Mark
F
F
W2
a
h
c
n
n
Dimensions
Dimensions
Tolerance
5.08
±0.2
(0.2)
(±0.008)
5.08
-0.5/+0.6
(0.2)
(-.020/+.024)
56.0
max.
(2.205)
370.0
max.
(14.57)
4.75
±3.25
(.187)
(±.128)
26.0
±12.0
(1.024)
(±.472)
80
max.
(3.15)
91
max.
(3.58)
56
372
372
max.
(2.2) (14.6) (14.6)
67
372
362
max.
(2.64) (14.6) (14.25)
64
372
362
max.
(2.52) (14.6) (14.25)
3
none
Not specified
0.1 %
max.
Dimension Description
Lead spacing: MF-R, MF-R/90, MF-R/600, MF-RX, MF-RX/72
Lead spacing: MF-RX/250
Reel width
Reel diameter
Space between flanges less device
Arbor hole diameter
Core diameter: MF-R, MF-RX, MF-R/90
Core diameter: MF-RX/250, MF-R/600
Box: MF-R, MF-RX, MF-R/90
Box: MF-RX/250
Box: MF-R/600
Consecutive missing places: MF-R, MF-RX, MF-R/90
Consecutive missing places: MF-RX/250, MF-R/600
Empty places per reel: MF-R, MF-RX, MF-R/90
Empty places per reel: MF-RX/250, MF-R/600
Taped Component Dimensions - Figure 1
h
h
p
p
Reference plane
H
1
L
P
1
F
A
B
W
0
H
0
W
1
W
H
H
1
I
2
I
1
P
0
D
0
User direction of feed
Cross section A - B
DIMENSIONS:
MM
(INCHES)
Reel Dimensions - Figure 2
t
Reel
h
d
User
direction
of
feed
Upper side
Tape
Lower side
f
h
w
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
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