al Film Resistors Flameproof Power Welwyn Component Flameproof Power Metal Film Film Resistors Resistors Metal es Welwyn Components MFP power Series st size for MFP Series rating ** Smallest Smallest size for forto power size power rating nce range 0.1 ohms 1M rating ohms ** Resistance Resistance range 0.1 ohms to 1M ohms range 0.1 ohms to 1M ohms roof protection * Flameproof Flameproof protection protection * Electrical Data cal Data Power rating at 70C watts Resistance range ohms Limiting element voltage g at 70C ange MFP1 TCR wattsppm/C Resistance tolerance olerance edance ion 82 350 1 - 9.1 : 200 -55 to 155 10 : 50 C/watt PCB 120 -55 to 155 D Max f min d nom MFP1 6.2 2.5 21.0 0.6 10.2 0.6 0.3 MFP2 10.0 4.0 27.0 0.8 18.4 1.2 0.55 bend radius Wt.nom metal alloy on a high purity ceramic core, protected by a PCB remain Min. cement coating applied so that terminations completely clear. This permits a well defined bodybend length mounting (clean lead to clean lead dimension L). D Max f min d nom centres radius 10.2 Material wire. 4.0 27.0Solder-coated 0.8 copper18.4 Strength 82 CMin. L Max 0.6 100 1, 2, 5 mounting centres 2.5 21.0 Terminations 1R0 - 1M E24 preferred Dimensions (mm) & Weight (g) Type 2 E24 preferred 120 < 1 : 300 Construction The resistance s (mm) & Weight (g) element is a precisely controlled thin film of 10.0 0R1 - 1M Physical Data cal Data 6.2 100 1, 2, 5 % mperature range Max 1 - 9.1 : 200 10 : 50 <1 : 0.7 >=1 : 1.0 C ppm/C MFP2 350 < 1 : 300 voltsC/watt Ambient temperature range 2 1R0 - 1M MFP1 % ohms Standard values >=1 : 1.0 0R1 - 1M volts ment voltageThermal impedance ues <1 : 0.7 MFP2 0.6 1.2 The terminations meet the requirements of IEC 68.2.21 Solderability The terminations meet the requirements of d D L f Marking Resistors are colour coded with 4 or 5 bands depending on value and tolerance. IEC 62 colours are used. Solvent Resistance The body protection and marking are resistant to all normal Wt.nom d industrial cleaning solvents suitable for printed circuits. D 0.3 L f 0.55Flammability The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. Marking e element is a precisely controlled film of Resistors are colour coded with 4 or 5 bands depending on IEC 115-1, Clause thin 4.17.3.2 n a high purity ceramic core, protected by a value and tolerance. IEC 62 colours are used. ng applied so that General Note terminations remain General Note Welwyn Components reserves the right to make changes in product specification without notice or liability. lear. This TT permits ais subject well defined body Solvent A subsidiary of All electronics informationreserves Welwyn's own data and islength considered accurate at time of going to print. Resistance theto right to make changes in product specification without notice or liability. TT electronics plc All information is subject to TT electronics' own data and is considered accurate at time of going to print. www.bitechnologies.com www.irctt.com www.welwyn-tt.com o clean lead dimension L). Limited * Bedlington, Northumberland NE22 7AA, The and marking are resistant to all normal (c) Welwyn Components UK body protection Issue D * 03.06 Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com (c) TT electronics plc industrial cleaning solvents suitable for printed circuits. ons 11. 11 143 Flameproof Power Flameproof Power Metal Resistors MetalFilm Film Resistors Welwyn Components MFP Series MFP Series Performance Data Maximum Load at rated power : 1000 hours at 70C R % Shelf life : 12 months at room temperature R % 2 Derating from rated power at 70C R % zero at 155C Climatic R % 3 5 Climatic category 50/155/56 Temperature rapid change R % Resistance to solder heat R % 0.5 volts 500 min Voltage proof Application Notes 0.5 Packaging 1. If the resistors are to dissipate full rated power, it is recommended that the terminations should not be soldered closer than 4mm from the body. 2. Due to operating temperature limitations imposed by some pcb materials, derating may be necessary. An estimate of the temperature rise to be expected can be calculated using the thermal impedance figures given under Electrical Data. 3. MFP resistors an also be supplied pre-formed. MFP resistors are normally supplied tape packed ready for loading onto automatic sequencing and insertion machines. The standard taping method and critical dimensions are shown in Figure 1. Component wires will not protrude beyond the outside edge of the tapes. Alternative packaging available by request. Lead Formed resistors can also be supplied. Standard options of Lancet, Radial and Goalpost forming are shown in lead Form Information section. Figure 1 Type MFP1 MFP2 52 68 b (mm) 5 f1 6 f2 b 6 Body location f1 - f2 1.4 mm Ordering Procedure Example: MFP2 at 4.7 kilohms and 1% tolerance in ammo pack box of 2000 pieces - MFP2-4K7FI Type Value (use IEC62 code) Tolerance (use IEC62 code) F G J 1% 2% 5% Packing I Ammo MFP1 MFP2 5000/box 2000/box Standard General Note (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 Facsimile: +44 in (0)product 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com TT electronics reserves the822181 right to* make changes specification without notice or liability. 144 All information is subject to TT electronics' own data and is considered accurate at time of going to print. Issue D * 03.06 www.bitechnologies.com www.irctt.com www.welwyn-tt.com (c) TT electronics plc 11. 11