PF2270 Series Power Film Resistors • Resistances from 0.1 Ohms to 1M Ohms • Power Rating to 600 Watts • Resistance Tolerances to ±1% • TCR of ±100ppm/C • TO-227 (TO-238) Housing • Moisture Resistant Encapsulation • M4x5mm Screws Included • Isolated Back Plate • Excellent Pulse Handling SPECIFICATIONS Type PF2272 PF2274 PF2276 Power Rating (with heatsink) 200 W 300 W 600 W Power Rating (without heatsink) 5 W 5 W 5 W Additional Lead Configurations Y / Z Y / Z Y / Z 0.1 to 1M Ohms 0.1 to 1M Ohms 50 to 1K Ohms Resistance Range ( 0.1 to 1 Ohm only available Terminal Z ) ( 0.1 to 1 Ohm only available Terminal Z ) ( 0.1 to 1 Ohm only available Terminal Z ) Resistance Values E12 ( Plus 2 Ohm and 5 Ohm ) Thermal Resistance 0.35 °C/W 0.23 °C/W 0.11 °C/W Tolerances 5% ( 1% optional ) Temperature Coefficient ±100 ppm/°C Operating Temperature -55°C to 155°C Inductance 14 nH MAX Continuous Voltage √ (P * R) MAX Continuous Current 100A Isolation Voltage 2500VAC (5000VAC on request) 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, ±0.25% XYZ ) Insulation Resistance > 1000 MegOhm Flammability UL94 V-0 Substrate AlO Alumina / Cu Flange AlN Weight (grams) 20 30 30 Terminals: 1.0 Nm Max / 0.6 Nm Recommended Torque Mounting: 1.6 Nm Max / 1 Nm Recommended Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 © Riedon, Inc. www.riedon.com sales@riedon.com Revised: 201902_006

PF2270 Series Power Film Resistors SPECIFICATIONS (continued) Mounting Notes - Dimension mm ( ± mm ) inches ( ± inches ) The PF2270 Series Power Film Resistors must be attached to A 38.0 0.2 1.50 0.008 a suitable heatsink. Mount resistor using thermal grease to a B 25.0 0.2 0.98 0.008 clean, flat surface. Use a compression washer to provide 150 to C* 11.8 0.4 0.465 0.016 300 pounds ( 665 to 1330N ) of mounting force. Torque mount- ing screw to 8 in-lbs ( 0.9 N-m ). Torque termination screws to 5 D 4.2 0.1 0.165 0.008 in-lbs (0.6 N-m). E 13.0 0.3 0.512 0.012 Back plate is isolated from both pins. 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 *0.25 mm tolerance availble (-T) Terminal Configuration & Schematics 4 3 4 3 4 3 Note: Style Z is not a true 4-terminal measurement. Current can be applied to any pins 1 2 1 2 1 2 STANDARD Y Z PF2272 PF2272Y PF2272Z PF2274 PF2274Y PF2274Z PF2276 PF2276Y PF2276Z Power Rating Notes - PF2270 Serie s Power Derating Curve The PF2270 Series Power Film Resistors must be attached to ％ Rated Power a suitable heatsink. The maximum internal resistor temperature is 155°C. 85 °C 100 To specify an appropriate heatsink use the following formula : Slope 0.35 °C/W 80 R = TMAX-(P*RHR)-TA 60 125 °C HH P 40 Where: RθH = Thermal Resistance of Heatsink ( K/W ) 20 155 °C R = Thermal Resistance of Resistor ( K/W ) TθR = Maximum Temperature of Resistor 0 TM A=X Ambient Temperature of Heatsink ( °C ) -50 0 50 100 150 200 PA = Power Through Resistor ( W ) Base Temperature (°C) Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 © Riedon, Inc. www.riedon.com sales@riedon.com Revised: 201902_006

PF2270 Series Power Film Resistors SPECIFICATIONS (continued) Pulse Durability PF2272 10 OHM 1% Pulse Durability PF2274 10 OHM 1% 1000 1000 W) 100 W) 100 wer (k . wer (k o 10 o 10 P P ak ak e e e P 1 e P 1 s s Pul 200W Pul 300W 0.1 0.1 1n 10n 100n 1u 10u 100u 1m 10m 100m 1 10 100 1n 10n 100n 1u 10u 100u 1m 10m 100m 1 10 100 Pulse Width (seconds) Pulse Width (seconds) Tentative continuous pulse power allowance at duty Pulse Durability PF2276 100 OHM 1% 0.01. Load life test will be necessary in actual equip- ment because curve may be changed by resistance, 1000 repetition, duty, and operating temperature. Dotted line shows estimation. W) 100 k wer ( o 10 P ak e e P 1 s 600W Pul 0.1 1n 10n 100n 1u 10u 100u 1m 10m 100m 1 10 100 Pulse Width (seconds) Note: Flying lead terminations are available for enhanced clearance and creepage. Please contact factory for details. Ordering Information Part Description: Part Type - Terminal Style - Resistance - Tolerance PF2274Y 10 Ohms 5% Part Type Terminal Style Resistance Tolerance (*) For standard terminal style omit letter PF 2272 (*) 0.1 to 100K Ohms 5 % (**) 1% Tolerance Optional PF 2274 Y 50 to 1K Ohms (**) PF 2276 Z Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 © Riedon, Inc. www.riedon.com sales@riedon.com Revised: 201902_006