Riedon Inc.

300CypressAvenue

AlhambraCA91801

(626)284-9901

(626)284-1704

www.riedon.com

Page81

rev.03/2006A

0

20

40

60

80

100

120

25

50

85

100

115

130

145

155

Temperature of the backplate (°C)

Temperature Coefficient

Derating

PowerResistors

-8000

-3000

2000

7000

-50

-25

0

25

50

75

100

125

50ppm/K

100ppm/K

Temperature(°C)

Dimension

mm

tol.

(±mm)

inches

tol.

(±inches)

A

12.70

0.2

0.50

0.008

B

10.16

0.2

0.40

0.008

C

0.76

0.1

0.03

0.004

D

5.08

0.1

0.20

0.004

E

4.00

0.1

0.16

0.004

F

1.20

0.1

0.05

0.004

G

14.60

0.2

0.57

0.008

H

15.00

0.2

0.59

0.008

I

17.33

0.2

0.68

0.008

J

0.40

0.1

0.02

0.004

K

1.85

0.1

0.07

0.004

Dimension

mm

inches

A

12.10

0.476

B

11.16

0.439

C

18.33

0.722

D

5.08

0.200

E

1.76

0.069

F

3.20

0.126

NPS/NHS2-T220

Dimensions

PowerRatingNotes-

TheNPR/NHRSeriesResistorsmustbeattachedtoasuitable

heatsink.Themaximuminternalresistortemperatureis155°C.

Tospecifyanappropriateheatsinkusethefollowingformula:

R

q

Where: R

q

R

q

T

T

P=PowerThroughResistor(W)