Features
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Applications
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Radial Leaded Devices
High ability to withstand lightning surges
Ideal lightning surge coordination device
Binned and sorted narrow resistance
ranges available
Lead free option available
Agency recognition:
T V Rheinland
Customer Premise Equipment (CPE)
Central Office / Telecom Centers (CO)
Access equipment
MF-R/250 Series -
Telecom PTC Resettable Fuses
Electrical Characteristics
Max.
Interrupt
Ratings
Volts
Amps
(Vrms)
(A)
Max.
MF-R008/250U
MF-R008/250
MF-R011/250U
MF-R012/250
MF-R012/250-A
MF-R012/250-C
MF-R012/250-F
MF-R012/250-1
MF-R012/250-2
MF-R012/250U
MF-R014/250
MF-R014/250-A
MF-R014/250-B
MF-R014/250U
MF-R018/250U
60
60
60
60
60
60
60
60
60
60
60
60
60
60
60
250
250
250
250
250
250
250
250
250
250
250
250
250
250
250
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
3.0
10.0
One Hour
Post-Trip
Resistance
Ohms
at
23 °C
Max.
33.0
33.0
16.0
16.0
16.0
14.0
16.0
16.0
16.0
16.0
12.0
12.0
14.0
12.0
4.0
Model
Max.
Operating
Voltage
(Vdc)
Hold
Current
Amps
at
23 °C
IH
0.08
0.08
0.11
0.12
0.12
0.12
0.12
0.12
0.12
0.12
0.145
0.145
0.145
0.145
0.18
Initial
Resistance
Ohms
Ohms
at
at
23 °C
23 °C
Min.
Max.
14.0
15.0
5.0
4.0
7.0
5.5
6.0
6.0
8.0
6.0
3.0
3.0
4.5
3.5
0.8
20.0
22.0
9.0
8.0
9.0
7.5
10.5
9.0
10.5
10.0
6.0
5.5
6.0
6.5
2.0
“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 Solderability ....................................................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-R/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
≤
R1max
Time to Trip ........................................................5 times Ihold, Vmax, 23 °C..........................T
≤
typical 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 ................................................R02057213
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
BOURNS [ BOURNS ELECTRONIC SOLUTIONS ]
