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Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 12/10a SPECIFICATIONS
- Resistances from 0.1 Ohms to 100K Ohms
- Power Rating to 600 Watts
- Resistance Tolerances to ±1%
- TCR of ±100ppm/C
- TO-227 (TO-238) Housing
- Isolated Back Plate
- Dual Resistor Package Available Thin Film Power Resistors Type PF2272 PF2274 PF2276 Power Rating (with heatsink) 200 W 300 W 600 W Resistance Range 0.1 to 100K Ohms 0.1 to 100K Ohms ( 0.1 to 1 Ohm only available Terminal Z ) 50 to 1K Ohms Resistance Values E12 ( Plus 2 Ohm and 5 Ohm ) Thermal Resistance 0.5 °C/W 0.32 °C/W 0.11 °C/W Tolerances 5% ( 1% optional ) Temperature Coefficient ±100 ppm/°C Operating Temperature -55°C to 155°C MAX Continuous Voltage √ (P * R) MAX Continuous Current 55A Isolation Voltage 2500VAC Load Life ( 25°C, 90m ON, 30m OFF, 1000hr ) ±1% Humidity ( 40°C, 90-95% RH, DC0.1W, 1000hr ) ±1% Temp. Cycle ( -55°C 30m, 120°C 30m, 20X) ±1% Vibration ( 0.75mm, 100m/s2, 10-54Hz, 10X, XYZ ) ±0.25% Insulation Resistance > 1000 MegOhm Recommended Mounting Torques Terminals: 0.6 Nm Backplate: 1.0Nm Part Number - Terminal Style - Resistance - Tolerance PF2274X 10 Ohms 5% 4T
Ordering Information
Dimension mm (±mm) inches (±inches) A 38.0 0.2 1.50 0.008 B 25.0 0.2 0.98 0.008 C 11.8 0.5 0.47 0.020 D 4.2 0.1 0.165 0.008 E 13.0 0.3 0.512 0.012 F 15.0 0.4 0.591 0.016 G 30.0 0.1 1.181 0.004 H 10.0 0.2 0.394 0.008
Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 12/10a PF2270 Series Thin Film Power Resistors Power Rating Notes - The PF2270 Series Foil Resistors must be attached to a suitable heatsink. The maximum internal resistor temperature is 155°C. To specify an appropriate heatsink use the following formula : RθH = TMAX - ( P x RθR ) - TA P Where: R θH = Thermal Resistance of Heatsink ( K/W ) R θR = Thermal Resistance of Resistor ( K/W ) T MAX = Maximum Temperature of Resistor T A = Ambient Temperature of Heatsink ( °C ) P = Power Through Resistor ( W ) SPECIFICATIONS (continued) 0 25 50 75 100 125 150 175 200 100 120 Power ( % ) Ambient Temperature (°C) Power Derating Curve 4 3 Style X 4 3 Style Y 4 3 Style Z Available Terminal Styles Note: Style Z is not a true 4-terminal measurement Current can be applied to any pinsStandard