Resistors Make Possible Metal Film Resistors Metal Film Resistors Welwyn Components MFR Series MFR Series Professional grade approved to BSCECC 40101-803 and 019 Professional grade approved to s BSCECCTolerances do 40101-803wn to 0.5% and 019 Temperature coefficient down to 50ppm/C Tolerances down to 0.5% s Optional RoHS compliant or Lead bearing wire finishes Temperature coefficient down to 50ppm/C s All Pb-free parts comply with EU Directive 2011/65/EU (RoHS2) Electrical Data MFR3 MFR4 MFR5 Power rating at 70C watts 0.4 0.5 0.75 Resistance range ohms 10R - 1M 1R0 - 1M 1R0 - 1M Limiting element voltage volts 200 350 350 1 TCR ppm/C 50 50 10:150 >10:100 Resistance tolerance % 1 0.5 , 1 0.5 , 1 Note 1 - Tighter TCRs are available on professional grade, consult factory for details. CECC 40101 - 019 Requirements FZ FX EZ EX Power rating at 70C watts 0.25 0.25 0.5 0.5 Resistance range. ohms 1 to 1M 1 to 1M 10 to 1M0 10 to 1M Limiting element voltage volts 250 250 350 350 TCR ppm/C 100 250 100 250 5.1 to 9.1 : 200 5.1 to 9.1 : 500 Resistance tolerance % 1 1 1 1 CECC 40101 - 803 Requirements BC BK CC CK Power rating at 70C watts 0.125 0.125 0.25 0.25 Resistance range. ohms 10 to 1M 10 to 1M 10 to 1M 10 to 1M Limiting element voltage volts 200 200 250 250 TCR ppm/C 50 100 50 100 Resistance tolerance % 0.5 , 1 0.5, 1 0.5, 1 0.5, 1 These tables indicate the CECC specification requirements, and these are met or exceeded by the corresponding MFR series products E24, E96 preferred Standard values Thermal impedance C/watt 150 140 112 Ambient temperature range C -55 to 155 Product grades available commercial commercial, professional professional Physical Data Dimensions (mm) & Weight (g) PCB Min Wt. D max F min d nom mount bend Type L max nom centres radius MFR3 Commercial d 3.7 2.0 22.4 0.45 7.6 0.5 0.1 D L f Professional 6.2 2.5 21.0 0.6 10.2 0.6 0.3 MFR4 Commercial 6.8 3.0 21.0 0.55 10.2 0.6 0.3 MFR5 Professional 9.0 3.6 19.6 0.8 12.7 1.2 0.5 General Note General Note TT Electronics reserves the right to make changes in product specification without notice or liability. Welwyn Components reserves the right to make changes in product specification without notice or liability. A subsidiary of All information is subject to Welwyns own data and is considered accurate at time of going to print. All information is subject to TT Electronics own data and is considered accurate at time of going to print. www.ttelectronicsresistors.com TT electronics plc Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK TT Electronics plc Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com 11. 09 07.14 135Metal Film Resistors Metal Film Resistors Make Possible Welwyn Components MFR Series MFR Series Performance Data - Type MFR 3 CECC 40101-019 Actual Performance * Requirements Maximum Typical Load at commercial rating : 1000 hours at 70C Grap h 1 Load at CECC rating : 1000 hours at 70C R % 2 0.5 See Graph 1 Shelf life : 12 months at room temperature R % Not Specified 0.1 0.07 D ing zer o at C Short term overload R % 0.5 0.25 0.03 Climatic R % 2 0.5 0.2 Clim ta i c c gory 55 / / 65 Long term damp heat R % 2 0.5 0.3 Temperature rapid change R % 0.5 0.25 0.05 Resistance to solder heat R % 0.5 0.25 0.02 Vibration and bump R % 0.5 0.1 0.01 Noise. (in a ed c of fr qe cy) N specified 7 nI s luatoi n resistance o mh s > G1 > G1 > G1 oV ltag e pr oo f volts min min min Pulse handling Data available upon request * CECC requirements are included for reference only CECC release is not available on MFR3 Graph 1 Load for 1000 hours at 70C: maximum changes Performance Data - Type MFR 4 CECC 40101-019 CECC 40101-803 Actual Performance Requirements Requirements Maximum Typical Load at commercial rating : Grap h 2 1000 hours at 70C Load at CECC rating : R % 2 1 0.5 See Graph 2 1000 hours at 70C Shelf life : R % Not specified Not Specified 0.1 0.07 12 months at room temperature D ing zer o at C zer o at C Short term overload R % 0.5 0.25 0.25 0.01 Climatic R % 2 1 0.5 0.2 Clim ta i c c gory 55 / / 65 55 / / 65 Long term damp heat R % 2 1 0.5 0.3 Temperature rapid change R % 0.5 0.25 0.25 0.04 Resistance to solder heat R % 0.5 0.25 0.25 0.07 Vibration and bump R % 0.5 0.25 0.1 0.01 Noise. (in a decade of frequency) V/V Not Specified Not Specified 0.1 0.1 Insulation resistance ohms >1G >1G >1G >1G oV ltag e pr oo f volts min min min min uP ls e dling Dat a availabl e re uq est Graph 2 Load for 1000 hours at 70C: maximum changes General Note TT Electronics reserves the right to make changes in product specification without notice or liability. All information is subject to TT Electronics own data and is considered accurate at time of going to print. Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK www.ttelectronicsresistors.com Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: info welwyn-tt.com Website: www.welwyn-tt.com TT Electronics plc 136 07.14 nopu nah 005 005 004 005 521 521 eta 551 551 tare eeS 8.0 % R 004 004 053 0.0 1.0 to V/V neu eda 521 eta 551 tare eeS 8.0 % R