Selecting the Right Resistor for Your Application

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CR Series

CRT/CRL Series

CAT/CAY Series

4816P

CHF9838CNF Series

High Frequency Resistors

Table 3

Model

Power (W)

Frequency

(GHz)

VSWR

Substrate

Resistor Values

(Ohms)

CHF2010CNP

10

2

1.2

ALN

50, 100 +/- 5 %

CHF1206CNT

20

3

1.25

ALN

50 +/- 5 %

CHF2525CNT

40

9

1.25

ALN

50 +/- 5 %

CHF3725CNP

40

4

1.2

ALN

50 +/- 5 %

CHF3523CNT

150

3

1.1

ALN

50 +/- 5 %

CHF3020CBF

10

4

1.35

BEO

50, 100, 200 +/- 5 %

CHF5225xxF

60/30/20

4

1.2

ALN, AL203, BEO

50, 100 +/- 5 %

CHF8838CNF

150

4

1.2

ALN

50, 100 +/- 5 %

CHF9838CxF

250

4

1.2

ALN, BEO

50 +/- 5 %

CHF12545CBF

500

1

1.1

BEO

50, 100 +/- 5 %

CHR190104CBF

800

1

1.2

BEO

12.5, 25, 50, 100 +/- 5 %

CHF190104KBF

1000

1

1.2

BEO

50 +/- 5 %

Overview of Resistor Families (Continued)

Bourns® CHF resistors are provided in a standard surface mount package. These parts can

be either electrically insulated or terminated. Generally, there is one exposed lead while the

other lead is tied to the ground plane or to a heat sink. The substrates used in the surface

mount Bourns® CHF resistors are Aluminum Nitride and Beryllium Oxide. Higher power

parts with flanged packages have substrates of Beryllium Oxide, Alumina, and Aluminum

Nitride. While the substrates help to dissipate heat, operation at higher power levels may

require a heat sink to handle the dissipation. In some designs, the CHF series is bolted to the

heat sink, printed circuit board, or ground plane. The power ratings of Bourns® CHF resistors

make it possible to absorb very high pulses in high power situations.