Features This series is currently available but n Radial leaded devices not recommended for new designs. n Cured, flame retardant epoxy polymer insulating material meets UL 94V-0 requirements n RoHS compliant* and halogen free* n Agency recognition: MF-R/90 Series - PTC Resettable Fuses 3006 - Trimpot Trimming Potentiometer Electrical Characteristics One Hour Nominal Initial Post-Trip Max. Time Tripped I Resistance Resistance Agency Recognition I hold trip to Trip Power Values Standard Dissipation V max. I max. Trip Model Volts Amps Amperes Ohms Ohms Amperes Seconds Watts cUL TV at 23 C at 23 C at 23 C at 23 C at 23 C at 23 C Hold Trip Min. Max. Max. Typ. E174545 R 50366745 MF-R055/90 90 10 0.55 1.4 0.45 0.9 2.0 2.0 60 2.5 3 3 MF-R055/90U 90 10 0.55 1.4 0.45 0.9 2.0 2.0 60 2.5 3 3 MF-R075/90 90 10 0.75 1.8 0.37 0.75 1.65 2.0 60 2.5 3 3 U suffix indicates product without insulation coating. Environmental Characteristics Operating Temperature .................................... -40 C to +85 C Recommended Storage................................... +40 C max, 70 % R.H. max. 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 ................................................ +125 C to -55 C, 10 times ..............................10 % typical resistance change Solvent Resistance .......................................... MIL-STD-202, Method 215 ...............................No change (marking still legible) Vibration .......................................................... MIL-STD-883C, Method 2007.1,.......................No change (R < R < R ) min 1max Condition A Moisture Sensitivity Level (MSL) ..................... See Note ESD Classification ........................................... Class 6 (per AEC-Q200-2, HBM) Test Procedures and Requirements 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 Solderability ..................................................... 245 C 5 C, 5 seconds ..................................95 % min. coverage Thermal Derating Table - 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-R055/90 1.0 0.90 0.80 0.55 0.50 0.45 0.40 0.35 0.30 MF-R055/90U 1.0 0.90 0.80 0.55 0.50 0.45 0.40 0.35 0.30 MF-R075/90 1.32 1.15 1.04 0.75 0.70 0.63 0.55 0.47 0.35 I is approximately two times I . trip hold WARNING Cancer and Reproductive Harm - www.P65Warnings.ca.gov *RoHS Directive 2015/863, Mar 31, 2015 and Annex. ** 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. 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.Applications Almost anywhere there is a load to be protected with a voltage supply of up to 90 V, including: n Broadband cable power passing taps n Set-top boxes MF-R/90 Series - PTC Resettable Fuses 3312 - 2 mm SMD Trimming Potentiometer Product Dimensions A B C (Pitch) D E Physical Characteristics Model Max. Max. Nom. Min. Max. Style Lead Dia. Material 10.9 16.7 5.1 0.7 6.3 3.6 0.81 MF-R055/90 1 Sn/Cu (0.429) (0.657) (0.201 0.028) (0.248) (0.142) (0.032) 10.3 16.7 5.1 0.7 6.3 3.0 0.81 MF-R055/90U 1 Sn/Cu (0.406) (0.657) (0.201 0.028) (0.248) (0.118) (0.032) 11.9 15.5 5.1 0.7 6.3 3.6 0.81 MF-R075/90 1 Sn/Cu (0.469) (0.610) (0.201 0.028) (0.248) (0.142) (0.032) MM DIMENSIONS: (INCHES) Typical Part Marking How to Order MF - R 055/90 U - 0 - 17 Style 1 Represents total content. Layout may vary. Multifuse A E MANUFACTURER S Product TRADEMARK Designator PART IDENTIFICATION Series R055 LOT NO. R = Radial Leaded (S = CHINA) 1220S DATE CODE Component (FIRST DIGIT = Hold Current, I B LAST DIGIT OF YEAR hold 055, 075 (0.55 A - 0.75 A) NEXT THREE DIGITS = DAY OF YEAR) Max. Voltage Coating Packaging Quantity Blank = Coated U = Uncoated Bulk ...................................... 500 pcs. per bag D Packaging Options Tape & Reel .......................1500 pcs. per reel - 0 = Bulk Packaging Ammo-Pack ..................... 1000 pcs. per pack - 2 = Tape and Reel* C - AP = Ammo-Pak* Part Number Suffix Option Also available with straight leads (see How to - 17 = Straight Leads in Place of Order). Standard Kinked Leads *Packaged per EIA-468 Typical Time to Trip at 23 C 100 10 1 MF-R075/90 MF-R055/90 MF-R055/90U 0.1 1 10 Fault Current (Amps) MF-R/90, REV. N, 11/19 Specifications are subject to change without notice. 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. Time to Trip (Seconds)