Riedon Inc.

300 Cypress Avenue

Alhambra CA 91801

(626) 284-9901

(626) 284-1704

www.riedon.com

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Derating

Power Rating Notes -

The PFC Series Resistors must be attached to a suitable heat-

sink. The maximum internal resistor temperature is 155°C.

To specify an appropriate heatsink use the following formula :

Where:

R

θ

R

θ

T

T

P = Power Through Resistor ( W )

Heatsink Temperature (°C)

MOUNTING

Copper insert improves thermal conductivity to heatsink. Power ratings

of 35W can be achieved through active cooling of the heatsink. For

more general information on heatsinking please see our training mod-

ule on heatsinking by clicking here.

PFC Series

Thick Film Power SMD Resistors

Copper Insert

Via-Holes

Plastic Tape Specifications

Standard Package contains 500 pcs/reel, diameter 254mm reel in paper box.

Digikey Package contains 500 pcs/reel, diameter 254mm reel in paper box.

Power Derating Curve

°C

°C

( *

)

R

P

T

P

R

T

H

MAX

R

A

=

-

-

H

H