Metal Film Resistors MFR SERIES Approved to BSCECC 40101-803 and 019 Tolerances down to 0.5% Temperature coefficient down to 50ppm/C Electrical Data Commercial Power rating at 70C Resistance range Limiting element voltage TCR MFR3 0.4 1R0 - 1M 200 <10 and >150K: 100* 10 to 150K:50 Resistance tolerance % 1,2 * Note:- Tighter TCR'S are available, consult factory for details. watts ohms volts ppm/C Approved CECC 40101 - 019 Style Power rating at 70C watts Resistance range. ohms Limiting element voltage volts TCR ppm/C Resistance tolerance % MFR5 0.75 1R0 - 1M 350 10:150 >10:100* 0.5, 1,2 0.5, 1,2 GZ GX FZ FX 0.125 0.125 0.25 0.25 1 to 1M 1 to 1M 1 to 1M 1 to 1M 175 175 250 250 5.1 to 9.1 : 200 5.1 to 9.1 : 500 100 250 10 : 100 10 : 250 5.1 to 9.1 : 200 5.1 to 9.1 : 500 1,2 1,2 1,2 1,2 Approved CECC 40101 - 803 Style Power rating at 70C watts Resistance range. ohms Limiting element voltage volts TCR ppm/C Resistance tolerance % Standard values Thermal impedance Ambient temperature range MFR4 0.5 1R0 - 10M 350 50 BC 0.125 10 to 1M 200 50 0.5, 1, 2 C/watt C BK 0.125 10 to 1M 200 100 0.5, 1, 2 EZ 0.5 10 to 1M0 350 100 EX 0.5 10 to 1M 350 250 1,2 1,2 CC 0.25 10 to 1M 250 50 0.5, 1, 2 CK 0.25 10 to 1M 250 100 0.5, 1, 2 E24, E96 preferred 140 -55 to 155 150 112 Physical Data Dimensions (mm) & Weight (g) Type MFR3 MFR4 MFR5 L Max 3.5 6.2 9.0 D Max 1.8 2.5 3.6 f min 22.4 21.0 19.6 d nom 0.5 0.6 0.8 PCB mounting centres 7.6 10.2 12.7 Min Bend Radius 0.5 0.6 1.2 Wt. nom 0.1 0.3 0.5 d D L f General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. All information is subject to Welwyn's own data and is considered accurate at time of going to print. (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, England Tel: 01670 822181 Fax: 01670 829465 Web: http://www.Welwyn-TT.co.uk Issue A 07/99 135 Metal Film Resistors MFR SERIES Performance Data - Type MFR 3 CECC 40101-019 Requirements Load at commercial rating : 1000 hours at 70C Load at CECC rating : 1000 hours at 70C Shelf life : 12 months at room temperature Derating Short term overload Climatic Climatic category Long term damp heat Temperature rapid change Resistance to solder heat Vibration and bump Noise. (in a decade of frequency) Insulation resistance Voltage proof Pulse handling Actual Performance Maximum Typical 0.8 See Graph 1 R % R % 2 0.5 See Graph 1 R % Not Specified zero at 155C 0.5 2 55/125/56 2 0.5 0.5 0.5 Not specified >1G 350 min 0.1 0.07 0.25 0.5 0.03 0.2 0.5 0.25 0.25 0.1 0.1 >1G 400 min Data available upon request 0.3 0.05 0.02 0.01 0.07 >1G 400 min R % R % R % R % R % R % V/V ohms volts Graph 1 - Load for 1000 hours at 70C: maximum changes Performance Data - Type MFR 4 CECC 40101-019 Requirements Load at commercial rating : 1000 hours at 70C Load at CECC rating : 1000 hours at 70C Shelf life : 12 months at room temperature Derating Short term overload Climatic Climatic category Long term damp heat Temperature rapid change Resistance to solder heat Vibration and bump Noise. (in a decade of frequency) Insulation resistance Voltage proof Pulse handling CECC 40101-803 Requirements R % R % 2 R % Not specified zero at 155C 0.5 2 55/125/56 2 0.5 0.5 0.5 Not Specified >1G 500 min R % R % R % R % R % R % V/V ohms volts 1 Actual Performance Maximum Typical 0.8 See Graph 2 0.5 See Graph 2 Not Specified 0.1 zero at 155C 0.25 0.25 1 0.5 55/125/56 1 0.5 0.25 0.25 0.25 0.25 0.25 0.1 Not Specified 0.1 >1G >1G 400 min 500 min Data available upon request 0.07 0.01 0.2 0.3 0.04 0.07 0.01 0.1 >1G 500 min Graph 2 - Load for 1000 hours at 70C: maximum changes (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, England Tel: 01670 822181 Fax: 01670 829465 Web: http://www.Welwyn-TT.co.uk 136 Issue A 07/99 Metal Film Resistors MFR SERIES Performance Data - Type MFR 5 CECC 40101-019 Requirements Load at commercial rating : 1000 hours at 70C Load at CECC rating : 1000 hours at 70C Shelf life : 12 months at room temperature Derating Short term overload Climatic Climatic category Long term damp heat Temperature rapid change Resistance to solder heat Vibration and bump Noise. (in a decade of frequency) Insulation resistance Voltage proof Pulse handling CECC 40101-803 Requirements R % R % 2 R % Not specified zero at 155C 0.5 2 55/125/56 2 0.5 0.5 0.5 Not Specified >1G 700 min R % R % R % R % R % R % V/V ohms volts 1 Actual Performance Maximum Typical 0.9 See Graph 3 0.5 See Graph 3 Not Specified 0.1 zero at 155C 0.25 0.25 1 0.5 55/125/56 1 0.5 0.25 0.25 0.25 0.25 0.25 0.1 Not Specified 0.1 >1G >1G 500 min 700 min Data available upon request 0.07 0.01 0.2 0.3 0.04 0.07 0.01 0.07 >1G 700 min Graph 3 - Load for 1000 hours at 70C: maximum changes PACKAGING All MFR resistors are supplied tape packed ready for loading on to automatic sequencing and insertion machines. Component wires will not protrude beyond the outside edge of the tapes. Alternative packaging available by request. TERMINATIONS Material Solder-coated copper wire. Strength The terminations meet the requirements of IEC 68.2.21 Solderability The terminations meet the requirements of IEC 115-1, Clause 4.17.3.2 5 f1 6 f2 52 6 f1 - f2 1.4 mm Lead Formed resistors can also be supplied. Standard options of Lancet, Radial and Goalpost forming are shown in Lead Form Information section. STANDARD QUANTITIES PER PACKAGE Type Large Ammo Pack MFR3 5,000 CONSTRUCTION The resistance element is a precisely controlled thin film of metal alloy sputtered on to a high purity ceramic core, protected by a moisture-resistant, high dielectric strength coating applied so that terminations remain completely clear. MFR4 5,000 MFR5 2,500 MARKING 0.5% and 1% tolerance resistors are colour coded with 5 bands, 2% tolerance has 4. IEC 62 colours are used. SOLVENT RESISTANCE The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, England Tel: 01670 822181 Fax: 01670 829465 Web: http://www.Welwyn-TT.co.uk Issue A 07/99 137