Flameproof Power Metal Film Resistor MFP Series • Flameproof protection • Small size for power rating Electrical Data IRC Type Power Rating @ 70°C (watts) Resistance Range (watts) MFP05 0.5 7R5 - 15R0 MFP1 <1 ohm: 0.7 >1 ohm: 1.0 0.1 - 1M MFP2 2 1R0 - 1M Limiting Element Voltage (volts) TCR (ppm/°C) Resistance Tolerance* (%) Standard Values 100 350 Thermal Impedance (°C/watt) Ambient Temperature (°C) 150 <1 ohm: 300 1 ohm-9.1 ohm: 200>10 ohm: 100 1, 2, 5 100 E24 preferred 120 -55 to 155 82 * Below 1 ohm 5% TOL preferred. Environmental Data Characteristic Maximum Load: 1000 hours at 70°C ∆R 5 Shelf Life: 12 months at room temperature ∆R 2 Derating from rated power at 70°C ∆R zero at 155°C Climatic ∆R 3 Climatic Category ∆R 50/155/56 Temperature rapid change ∆R 0.5 Resistance to solder heat ∆R 0.5 volts 500 min Voltage proof General Note IRC reserves the right to make changes in product specification without notice or liability. All information is subject to IRC’s own data and is considered accurate at time of going to print. Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com A subsidiary of TT electronics plc MFP Series Issue October 2008 Sheet 1 of 3 Flameproof Power Metal Film Resistor Physical Data d D f L Dimensions (mm) and Weight (g) IRC Type L max D max f min d nom PCB mounting centers Min. Bend Radius Wt. nom MFP05 3.5 1.8 22.4 0.5 7.6 0.5 0.1 MFP1 6.2 2.3 21.0 0.6 10.2 0.6 0.3 MFP2 10.0 4.0 19.0 0.8 18.4 1.2 0.55 Construction The resistance element is a precisely controlled thin film of metal alloy on a high purity ceramic core, protected by a cement coating applied so that terminations remain completely clear. This permits a well defined body length, (clean lead to clean lead dimension L). 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 Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com Marking MF Series resistors are color coded with 4 or 5 bands depending on value and tolerance. IEC colors are used. Solvent Resistance The body protection and marking are resistant to all normal industrial cleaning solvents suitable for printed circuits. Flammability The resistors coating will not burn or emit incandescent particles under any condition of applied temperature or power overload. MFP Series Issue October 2008 Sheet 2 of 3 Flameproof Power Metal Film Resistor Application Notes Packaging 1. If the resistors are to dissipate full rate power, it is recommended that the terminations should not be soldered closer than 4mm from the body. 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 below. Component wires will not protrude beyond the outside edge of the tapes. All taped resistors will be supplied either on reels or in ammopacks, depending on quantities ordered. Pre-formed resistors are supplied loose packed in plastic bags or boxes. This product and packaging is denoted code F. 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 can also be supplied pre-formed, contact factory for details. Ordering Data Sample Part No. MFP1 6802 J Type Code MFP05 MFP1 MFP2 Reel R 5000 5000 2500 Ammopack A A 5000 5000 2500 R IRC Type (MFP1, MFP2) Value (100 ohms and greater - First 3 significant figures plus 4th digit multiplier) Example: 100 ohms = 1000, 1000 ohms = 1001, 150,000 ohms = 1503 (Less than 100 ohms - ‘R’ is used to designate decimal) Example: 51 ohms = 51R0, 1 ohm = 1R00, 0.25 ohm = R250 Tolerance F = 1%, G = 2%, J = 5% Packaging Details R = Reel, A = Ammo Wire and Film Technologies Division • 4222 South Staples Street • Corpus Christi Texas 78411 USA Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com MFP Series Issue October 2008 Sheet 3 of 3