MF-RX250_11 Datasheet, PDF (1/5 Pages) Bourns Electronic Solutions – Telecom PTC Resettable Fuses

*RoHS ^COMPLIANT
2R4X000112K
Features
■ Radial leaded devices
■ Fast tripping resettable PTCs
■ Binned and sorted narrow resistance
ranges available
■ RoHS compliant*
■ Agency recognition:
Applications
■ Customer Premise Equipment (CPE)
■ Central Office / Telecom Centers (CO)
■ Access equipment
MF-RX/250 Series - Telecom PTC Resettable Fuses
Electrical Characteristics
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
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
“U” suffix indicates product without insulation coating.
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
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.