PFC Series Thick Film Power SMD Resistors • • • • • • • TO-126 Pad Dimensions Extremely Low Profile Resistances from 0.1 Ohm to 51kOhms Power Rating to 25 Watts Resistance Tolerances to ±1% TCR to ±100ppm/°C Isolated Back Plate SPECIFICATIONS Type PFC10 (TO-126) Power Rating with heatsink 25W Thermal Resistance Rthj-c ( 2.5W on Simple Solder Pad ) 3.6 K/W Resistance Range 0.1 - 51K Ohms E12+ (includes 2.5, 4.0, 5.0, 8.0, and 16) Tolerances (others upon request) 1% / 5% Temperature Coefficient 100 ppm/K Operating Temperature -55°C to 155°C Max Operating Voltage √(P * R) Capacitance 1.44 pF Inductance 8.38 nH Withstanding Voltage 1500 VAC Insulation Resistance Over 1,000 Megohm Resistor Material Thick Film Test Conditions Load Life Humidity Results ±1% ±1% 90 min ON, 30 min OFF, 1000 hrs @ 25C 90-95% RH, 0.1W, 1000 hrs @ 40C Temperature Cycle ±0.25% -55C for 30 min, +155C for 30 min, 5 cycles Solder Heat ±0.1% 350C ±5C for 3 seconds Vibration ±0.25% IEC60068-2-6 Ordering Information Part Description: Part Type - Resistance - Tolerance PFC10 10 Ohms 1% Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 07/13 PFC Series Thick Film Power SMD Resistors SPECIFICATIONS (continued) Dimensions Note: Back plate is isolated from both pins. PFC10 (TO-126) Dimension mm tol. (±mm) inches tol. (±inches) A 8.2 0.2 0.323 0.008 B 12.0 0.2 0.472 0.008 C 1.0 0.05 0.039 0.002 D 5.08 0.1 0.2 0.004 E 0.75 0.05 0.030 0.002 F 1.78 0.05 0.070 0.002 G 8.51 - 0.335 - H 8.80 - 0.346 - I 14.10 - 0.555 - J 5.08 - 0.2 - K 2.00 - 0.079 - L 3.8 - 0.150 - CHIP CONSTRUCTION (EXPLODED VIEW) Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 07/13 PFC Series Thick Film Power SMD Resistors SPECIFICATIONS (continued) Derating Power Rating Notes - Power Derating Curve The PFC Series 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 : 120 Power ( % ) 100 RqH = TMAX - ( P x RqR ) - TA P 80 60 40 Where:RqH = Thermal Resistance of Heatsink ( K/W ) RqR = Thermal Resistance of Resistor ( K/W ) TMAX = Maximum Temperature of Resistor TA = Ambient Temperature of Heatsink ( °C ) P = Power Through Resistor ( W ) 20 0 0 25 50 75 100 125 150 175 200 Heatsink Temperature (°C) Copper Insert Copper insert improves thermal conductivity to heatsink. Power ratings of 25W can be achieved through active cooling of the heatsink. For more general information on heatsinking please see our training module on heatsinking by clicking here. Via-Holes Riedon Inc. 300 Cypress Avenue Alhambra CA 91801 (626) 284-9901 (626) 284-1704 www.riedon.com 07/13