etal Film Resistors Welwyn Compon Flameproof Power Resistors Make Possible Metal Film Resistors Flameproof Power allest size for power rating Metal MFP Series Film Resistors Welwyn Components Series istance range 0.1 ohms to 1M ohms * Smallest size for power rating * Smallest size for power rating Flameproof protection Resistance range 0.1 ohms to 1M ohms Flameproof protection MFP Series meproof protection * Resistance range 0.1 ohms to 1M ohms All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) Electrical Data ctrical Data MFP1 Power rating at 70C watts Resistance range ohms Limiting element voltage watts TCR ppm/C ohms % Resistance tolerance Standard values g element voltage ppm/C 350 1 - 9.1 : 200 < 1 : 300 C nce tolerance >=1 : 1.0 10 : 50 0R1 - 1M Physical al impedance Data 120 350 1 - 9.1 : 200 82 10 : 50 C/watt 120 Min. -55 to 155 f min d nom mounting centres bend radius Wt.nom 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 Construction nsions (mm) & Weight (g) d D L f Marking The resistance element is a precisely controlled thin film of PCB by aMin. metal alloy on a high purity ceramic core, protected cement coating applied so that terminations remain mounting bend completely clear. This permits a well defined body length Max D Max f min d nom centres radius (clean lead to clean lead dimension L). 2.5 21.0 10.0 Terminations 4.0 27.0 82 C PCB MFP1 6.2 100 -55 to 155 1, 2, 5 D Max sical Data 1R0 - 1 1, 2, 5 E24 preferred nt temperature range (mm) & Weight (g) Dimensions L Max 2 100 % rd values ruction <1 : 0.7 MFP2 1R0 - 1M E24 preferred C/watt Ambient temperature range L < 1 : 300 2 MFP1 volts Thermal impedance Type >=1 : 1.0 0R1 - 1M volts rating at 70C nce range <1 : 0.7 MFP2 0.6 10.2 0.6 0.8 18.4 1.2 Material Solder-coated copper wire. Strength The terminations meet the requirements of IEC 68.2.21 Resistors are colour coded with 4 or 5 bands depending on value and tolerance. IEC 62 colours are used. Solvent Resistance Wt.nom d The body protection and marking are D resistant to all normal 0.3 L industrial cleaning solvents suitable for printed circuits. f 0.55 Flammability The resistor coating will not burn or emit incandescent particles under any condition of applied temperature or Marking power overload. stance element is a precisely controlled thin film of of Resistors are colour coded with 4 or 5 bands depending Solderability The terminations meet the requirements IEC 115-1, Clause 4.17.3.2 loy on a high purity ceramic core, protected by a value and tolerance. IEC 62 colours are used. coating applied so that terminations remain General Note tely clear. General This permits a well defined body length Solvent Resistance Note Welwyn Components reserves the right to make changes in product specification without notice or liability. A subsidiary of All Electronics information is subject to Welwyn's own data and is considered accurate at timeor ofliability. going to print. TT reserves the right to make changes in product specification without notice ead to clean lead dimension L). The body protection and marking are resistant to all nor TT electronics plc All information is subject to TT Electronics' own data and is considered accurate at time of going to print. www.ttelectronicsresistors.com (c) Welwyn Components Limited * Bedlington, Northumberland NE22 7AA, UK industrial cleaning solvents suitable for printed circuits. Issue D * 03.06 Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com nations (c) TT Electronics plc 07.14 143 Flameproof Power Flameproof Power Metal Resistors MetalFilm Film Resistors Make Possible 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 822181 * Facsimile: (0) 1670 829465 * without Email: info@welwyn-tt.com * Website: www.welwyn-tt.com TT Electronics reserves the right to make changes+44 in product specification 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.ttelectronicsresistors.com (c) TT Electronics plc 07.14