Riedon Inc.

300 Cypress Avenue

Alhambra CA 91801

(626) 284-9901

(626) 284-1704

www.riedon.com

07/13

Derating

Dimensions

PFS35

Power SMD Film Resistors

Dimension

mm

tol.

(±mm)

inches

tol.

(±inches)

A

10.3

0.2

0.405

0.008

B

10.1

0.2

0.400

0.008

C

15.3

1.0

4.54

0.04

D

5.08

0.1

0.200

0.004

E

1.5

0.05

0.060

0.002

F

0.75

0.05

0.030

0.002

G

2.2

0.2

0.087

0.008

H

4.5

0.2

0.177

0.008

J

0.5

0.05

0.020

0.002

K

2.5

0.5

0.10

0.02

L

5.0

1.0

0.20

0.04

Power Rating Notes -

The PFS35 Series Resistors must be attached to a suitable

heatsink. The maximum internal resistor temperature is 175°C.

To specify an appropriate heatsink use the following formula :

R

q

P

Where: R

q

R

q

T

T

P = Power Through Resistor ( W )

0

20

40

60

80

100

120

25

50

85

100 115 130 145 155

Temperature of the backplate(°C)

Note:

Back plate is isolated from both pins.