UMA 0204, UMB 0207

www.vishay.com

Vishay Beyschlag

Revision: 27-Mar-14

2

Document Number: 28715

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

APPLICATION INFORMATION

The power dissipation on the resistor generates a temperature rise against the local ambient, depending on the heat flow

support of the printed-circuit board (thermal resistance). The rated dissipation applies only if the permitted film temperature is

not exceeded. Furthermore a high level of ambient temperature or of power dissipation may raise the temperature of the solder

joint, hence special solder alloys or board materials may be required to maintain the reliability of the assembly.

These resistors do not feature a lifetime limitation when operated within the limits of rated dissipation, permissible operating

voltage and permissible film temperature. However, the resistance typically increases due to the resistor’s film temperature over

operating time, generally known as drift. The drift may exceed the stability requirements of an individual application circuit and

thereby limits the functional lifetime.

Notes

• TCR 10 ppm/K and TCR 05 ppm/K is specified over the temperature range from -10 °C to +85 °C.

• UMA 0204: Approval to EN 140401-803, “Version A” is achieved for TCR 10 ppm/K with 0.25 % and 0.1 %.

MAXIMUM RESISTANCE AT RATED DISSIPATION

Operation mode

Precision

Standard

UMA 0204

0.07 W

0.25 W

UMB 0207

0.11 W

0.4 W

Applied maximum film temperature,



F max.

85 °C

125 °C

Max. resistance change at rated dissipation

|

R/R max.|, after:

1000 h

 0.02 %

 0.05 %

8000 h

 0.05 %

 0.1 %

225 000 h

 0.15 %

 0.3 %

TEMPERATURE COEFFICIENT AND RESISTANCE RANGE

TYPE

TCR

TOLERANCE

RESISTANCE RANGE

E-SERIES

UMA 0204

± 15 ppm/K

±

0.05 %

47

 to 332 k

E192

± 10 ppm/K

±

0.25 %

22

 to 332 k

±

0.1 %

43

 to 332 k

± 0.05 %

75

 to 221 k

± 5 ppm/K

±

0.25 %

33

 to 221 k

±

0.1 %

56

 to 221 k

± 0.05 %

75

 to 150 k

± 0.02 %

75

 to 100 k

UMB 0207

± 15 ppm/K

±

0.05 %

100

 to 390 k

± 10 ppm/K

±

0.25 %

100

 to 390 k

±

0.1 %

100

 to 390 k

± 0.05 %

100

 to 390 k

± 5 ppm/K

±

0.25 %

270

 to 390 k

±

0.1 %

270

 to 390 k

± 0.05 %

270

 to 390 k

± 0.02 %

270

 to 390 k