Features Applications n Radial leaded devices n Customer Premise Equipment (CPE) n Fast tripping resettable PTCs n Central Office / Telecom Centers (CO) n Binned and sorted narrow resistance n Access equipment ranges available n RoHS compliant* n Agency recognition: MF-RX/250 Series - Telecom PTC Resettable Fuses Electrical Characteristics One Hour Max. Interrupt Hold Current Initial Resistance Post-Trip Max. Ratings Resistance Operating Model Voltage Volts Amps Amps Ohms Ohms Ohms (Vdc) (Vrms) (A) at 23 C at 23 C at 23 C at 23 C Max. Max. I Min. Max. Max. H MF-RX012/250 60 250 3.0 0.12 4.0 8.0 16.0 MF-RX012/250-A 60 250 3.0 0.12 7.0 9.0 16.0 MF-RX012/250-C 60 250 3.0 0.12 5.5 7.5 14.0 MF-RX012/250-F 60 250 3.0 0.12 6.0 10.5 16.0 MF-RX012/250-1 60 250 3.0 0.12 6.0 9.0 16.0 MF-RX012/250-2 60 250 3.0 0.12 8.0 10.5 16.0 MF-RX012/250-T 60 250 3.0 0.12 7.0 12.0 16.0 MF-RX012/250U 60 250 3.0 0.12 6.0 10.0 16.0 MF-RX014/250 60 250 3.0 0.145 3.0 6.0 14.0 MF-RX014/250-A 60 250 3.0 0.145 3.0 5.5 12.0 MF-RX014/250-B 60 250 3.0 0.145 4.5 6.0 14.0 MF-RX014/250-T 60 250 3.0 0.145 5.4 7.5 14.0 MF-RX014/250U 60 250 3.0 0.145 3.5 6.5 12.0 MF-RX018/250 60 250 10.0 0.18 0.8 2.0 4.0 MF-RX018/250U 60 250 10.0 0.18 0.8 2.0 4.0 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 Humidity Aging...................................................... +85 C, 85 % R.H. 1000 hours ............................. 15 % typical resistance change Thermal Shock ..................................................... +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 Vibration ............................................................... MIL-STD-883C, Method 2007.1, Condition A ....... 5 % typical resistance change Moisture Sensitivity Level (MSL) ......................Level 1 ESD Classification - HBM .................................Class 6 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 ...................................................... TTT current, Vmax, 23 C .................................T max. time to trip (seconds) Hold Current .................................................... 30 min. at Ihold .................................................No trip Trip Cycle Life .................................................. 250 Vrms, 3A, 10 cycles ...................................No arcing or burning UL File Number ............................................... E174545 TV File Number ............................................. 50260658 *RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011. Specificationsaresubjecttochangewithoutnotice. Users should verify actual device performance in their specific applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf. *RoHS COMPLIANT VERSIONS AVAILABLE *RoHS COMPLIANT LEAD FREE LEAD FREE VERSIONS ARE RoHS COMPLIANT*Additional Features n Ability to withstand AC power cross conditions n Assists equipment with meeting ITU-T K.20/K.21/K.45 n Assists equipment with meeting Telcordia GR-1089-C Intrabuilding MF-RX/250 Series - Telecom PTC Resettable Fuses Thermal Derating Chart - I (Amps) hold Ambient Operating Temperature Model -40 C -20 C 0 C 23 C 40 C 50 C 60 C 70 C 85 C MF-RX012/250 0.186 0.165 0.143 0.120 0.099 0.088 0.077 0.066 0.050 MF-RX014/250 0.225 0.199 0.172 0.145 0.119 0.106 0.093 0.080 0.060 MF-RX018/250 0.269 0.240 0.211 0.180 0.153 0.138 0.123 0.109 0.087 I is approximately two times I . trip hold Product Dimensions A B C D E Physical Characteristics Model Max. Max. Nom. Min. Max. Lead Dia. Style Material 6.5 11.0 5.1 0.7 4.7 4.6 0.65 MF-RX012/250 1 Sn/Cu (0.256) (0.433) (0.201 0.028) (0.185) (0.181) (0.026) 6.0 10.0 5.1 0.7 4.7 3.8 0.65 MF-RX012/250U 2 Sn/Cu (0.236) (0.394) (0.201 0.028) (0.185) (0.150) (0.026) Style 1 Style 2 6.5 11.0 5.1 0.7 4.7 4.6 0.65 MF-RX014/250 1 Sn/Cu A A (0.256) (0.433) (0.201 0.028) (0.185) (0.181) (0.026) E E 6.0 10.0 5.1 0.7 4.7 3.8 0.65 MF-RX014/250U 2 Sn/Cu (0.236) (0.394) (0.201 0.028) (0.185) (0.150) (0.026) 11.0 13.6 5.1 0.7 4.7 4.6 0.65 MF-RX018/250 1 Sn/Cu B B (0.433) (0.535) (0.201 0.028) (0.185) (0.181) (0.026) 10.4 12.6 5.1 0.7 4.7 3.8 0.65 MF-RX018/250U 2 Sn/Cu (0.409) (0.496) (0.201 0.028) (0.185) (0.150) (0.026) Packaging options: BULK: 500 pcs. per bag. TAPE & REEL: 1500 pcs. per reel (available binned). MM DIMENSIONS: (INCHES) D C D C Style 1 Style 2 Typical Part Marking Style 1 Style 2 Style 3 Style 4 A E A A E A E E Represents total content. Layout may vary. MANUFACTURER S TRADEMARK PART B B B B IDENTIFICATION RX012 0 220 S YEAR CODE LOCATION CODE: DATE CODE S = CHINA C D C D C Style 3 D Style 4 D C A E A E B B Specifications are subject to change without notice. Users should verify actual device performance in their specific applications. C C The productsD described herein and this document are subject to specific legal D disclaimers as set forth on the last page of this document, and at www.bourns.com/docs/legal/disclaimer.pdf.