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57

characteristics

Resistive Element Thick Film

Encapsulation Screen Printed Glass

Resistance Value 100Ω up to 100KΩ

Temperature Coefficient 100ppm/°C

Tolerance 1%, 2%, 5%, 10%

Operating Temperature -55°C to +200°C

Test VDE 0750 (Pulse Duration 10 msec)

tFs series

Surge Capable

Thick Film Non Inductive

Type

U (KV)

Energy* (J)

Power (W)

TFSA

3

6

0.5

TFSB

3.5

9

0.5

TFSC

4

11

0.75

TFSD

7

33

1

TFSE

7

44

1.5

TFSF

11

55

2

*Published energy rating is for 10ms pulse. For shorter pulses energy rat-

ing has to be derated according to Max. Individual Pulse Rating chart and

Single Pulse Energy Rating considerations.

F e a t u r e s

•Appropriateformedicalsurgeprotec-

tionapplications

•Idealtoreplacestandardcarboncom-

positionresistors

•Customdimensions,values,toler-

ancesandcharacteristicsavailable

Notes

• Momentary overload capability is 5 times rated power for 1 second or 2 times

rated power for 5 seconds. Always verify designs with pulse and surge condi-

tions through thorough testing of the design at maximum operating tempera-

ture and maximum pulse loading (or some margin above maximum pulse

loading).

• Damage to the resistor by excessive pulse loading is generally indicated by an

increasing resistance of the resistor.

• Energy ratings are based on single pulses (at least 1 minute between pulses).

• For multiple pulse applications the energy pulse rating should be reduced and

the average power should not exceed the nominal power rating of the selected

model.

• See Single Pulse Energy section for more information

TheTFSSerieshasbeenspecificallydevelopedtoabsorblarge

amountsofenergybyefficientuseofitscompactmass.Ideal

formedicalsurgeprotectionapplications,thesethickfilmresis-

torsoffernon-inductiveperformanceinanaxialpackage.

Usesincludepowersupplyconversion,electronmicroscopes,

X-raysystems,high-resolutionCRTdisplays,andgeophysical

instrumentrelatedproducts.

s eries s peci F ications

A

C

B

HE

0.50mm

0.25mm

Type

Watts

A

B

C

H

E

TFSA

0.5

9

5.5

10

0.7

1.1

TFSB

0.5

11

5.5

10

0.7

1.1

TFSC

0.75

13

5.5

10

0.7

1.1

TFSD

1

21

8

10

0.9

1.3

TFSE

1.5

21

10.5

10

0.9

1.3

TFSF

2

26

10.5

10

0.9

1.3

dimensions

mm

(continued)