PFS35 datasheet(2/2 Pages) RIEDON

2 / 2 page

Riedon Inc.

300CypressAvenue

AlhambraCA91801

(626)284-9901

(626)284-1704

www.riedon.com

8/10

Derating

Dimensions

SPECIFICATIONS (continued)

PFS35

PowerSMDFilmResistors

Dimension

tol.

(±mm)

inches

tol.

(±inches)

10.3

0.2

0.405

0.008

10.1

0.2

0.400

0.008

15.3

1.0

4.54

0.04

5.08

0.1

0.200

0.004

1.5

0.05

0.060

0.002

0.75

0.05

0.030

0.002

2.2

0.2

0.087

0.008

4.5

0.2

0.177

0.008

0.5

0.05

0.020

0.002

2.5

0.5

0.10

0.02

5.0

1.0

0.20

0.04

PowerRatingNotes-

The PFS35 Series Resistors must be attached to a suitable

heatsink.Themaximuminternalresistortemperatureis175°C.

Tospecifyanappropriateheatsinkusethefollowingformula:

H=TMAX-(PxRqR)-TA

Where: R

H=ThermalResistanceofHeatsink(K/W)

R=ThermalResistanceofResistor(K/W)

MAX=MaximumTemperatureofResistor

A=AmbientTemperatureofHeatsink(°C)

P=PowerThroughResistor(W)

100

120

100 115 130 145 155

Temperatureofthebackplate(°C)

Note:

Backplateisisolatedfrombothpins.

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