Metal Film Resistors Welwyn Components MFR Series • Professional grade approved to BSCECC 40101-803 and 019 • Tolerances down to 0.5% • Temperature coefficient down to 50ppm/°C Electrical Data Power rating at 70°C Resistance range Limiting element voltage TCR Resistance tolerance MFR3 0.4 10R - 1M 200 50 1 watts ohms volts ppm/°C % MFR4 0.5 1R0 - 10M 350 50 0.5, 1,2 MFR5 0.75 1R0 - 1M 350 ≤10:150 >10:100* 0.5, 1,2 * Note:- Tighter TCR’S are available on professional grade, consult factory for details. Approved CECC 40101 - 019 Style Power rating at 70°C watts Resistance range. ohms Limiting element voltage volts TCR ppm/°C Resistance tolerance FZ FX 0.25 0.25 1 to 1M 1 to 1M 250 250 100 250 5.1 to 9.1 : 200 5.1 to 9.1 : 500 1,2 1,2 % Approved CECC 40101 - 803 Style Power rating at 70°C watts Resistance range. ohms Limiting element voltage volts TCR ppm/°C Resistance tolerance % BC 0.125 10 to 1M 200 50 0.5, 1, 2 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 Standard values Thermal impedance Ambient temperature range Product grades available °C/watt °C 150 140 -55 to 155 commercial, professional commercial 112 Physical Data Dimensions (mm) & Weight (g) d nom PCB mount centres Min bend radius Wt. nom 22.4 0.5 7.6 0.5 0.1 22.4 0.45 7.6 0.5 0.1 2.5 21.0 0.6 10.2 0.6 0.3 6.8 3.0 21.0 0.55 10.2 0.6 0.3 Professional 9.0 3.6 19.6 0.8 12.7 1.2 0.5 Commercial 10.0 3.7 19.6 0.6 12.7 0.6 0.5 Type MFR3 MFR4 MFR5 L max D max F min Professional 3.5 1.8 Commercial 3.7 2.0 Professional 6.2 Commercial 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. © Welwyn Components Limited · Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com A subsidiary of TT electronics plc Issue D · 05.07 135 Metal Film Resistors Welwyn Components MFR Series Performance Data - Type MFR 3 CECC 40101-019 Requirements Load at commercial rating : 1000 hours at 70°C Load at CECC rating : 1000 hours at 70°C 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 ∆R % ∆R % ∆R % ∆R % ∆R % ∆R % ∆R % ∆R % ∆R % µV/V ohms volts 2 Not Specified zero at 155°C 0.5 2 55/125/56 2 0.5 0.5 0.5 Not specified >1G 350 min Actual Performance Maximum Typical 0.8 See Graph 1 0.5 See Graph 1 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 Graph 1 – Load for 1000 hours at 70°C: maximum changes Performance Data - Type MFR 4 CECC 40101-019 Requirements Load at commercial rating : 1000 hours at 70°C Load at CECC rating : 1000 hours at 70°C 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 Actual Performance Maximum Typical ∆R % 0.8 See Graph 2 ∆R % 2 1 0.5 See Graph 2 ∆R % Not specified Not Specified 0.1 0.07 zero at 155°C 0.5 2 55/125/56 2 0.5 0.5 0.5 Not Specified >1G 500 min zero at 155°C 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 ∆R % ∆R % ∆R % ∆R % ∆R % ∆R % µV/V ohms volts 0.01 0.2 0.3 0.04 0.07 0.01 0.1 >1G 500 min Graph 2 – Load for 1000 hours at 70°C: maximum changes © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com 136 Issue D · 05.07 Metal Film Resistors Welwyn Components MFR Series Performance Data - Type MFR 5 CECC 40101-019 Requirements Load at commercial rating : CECC 40101-803 Requirements Actual Performance Maximum Typical ∆R % 1000 hours at 70°C Load at CECC rating : 1000 hours at 70°C Shelf life : 12 months at room temperature 0.9 See Graph 3 ∆R % 2 1 0.5 See Graph 3 ∆R % Not specified Not Specified 0.1 0.07 Derating zero at 155°C zero at 155°C Short term overload ∆R % 0.5 0.25 0.25 0.01 Climatic ∆R % 2 1 0.5 0.2 Climatic category 55/125/56 55/125/56 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) µV/V Not Specified Not Specified 0.1 0.07 Insulation resistance ohms >1G >1G >1G >1G volts 700 min 500 min 700 min 700 min Voltage proof Pulse handling Data available upon request Graph 3 – Load for 1000 hours at 70°C: maximum changes Packaging Construction 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. 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. Alternative packaging available by request. 5 f1 6 Material Hot tin dipped 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 f2 52 Terminations 6 f1 – f2 ≤ 1.4 mm Lead Formed resistors can also be supplied. Standard options of Lancet, Radial and Goalpost forming are available. 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. © Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: [email protected] · Website: www.welwyn-tt.com Issue D · 05.07 137 Metal Film Resistors MFR Series Ordering Procedure Example: Professional grade MFR4 at 4.7 kilohms and 1% tolerance in ammo pack box of 5000 pieces - MFR4 - 4K7 F I Type Value (use IEC62 code) Tolerance (use IEC62 code) D 0.5% F 1% G 2% Packing / Grade C I Ammo MFR3, MFR4 5000/box MFR5 2500/box MFR4 5000/box MFR5 2500/box CECC release is not available for commercial grade CECC release is optionally available for professional grade * * For CECC released product state on order the CECC number and style. Example: MFR4-4K7FI CECC40101-019 FZ © Welwyn Components Limited Bedlington Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 Facsimile: +44 (0) 1670 829465 Email: [email protected] Website: www.welwyn-tt.com Issue D . 05.07