MCT 0603 AT, MCU 0805 AT, MCA 1206 AT - Precision

Precision Thin Film Chip Resistor

Superior Moisture Resistivity

Vishay Beyschlag

Document Number: 28785

www.vishay.com

Revision: 09-Apr-09

2

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 limited lifetime when operated within the permissible limits. However, resistance value drift

increasing over operating time may result in exceeding a limit acceptable to the specific application, thereby establishing a

functional lifetime. The designer may estimate the performance of the particular resistor application or set certain load and

temperature limits in order to maintain a desired stability.

MAXIMUM RESISTANCE CHANGE AT RATED DISSIPATION

Operation mode

Standard

Power

Rated dissipation

MCT 0603 AT

0.100 W

0.125 W

MCU 0805 AT

0.125 W

0.200 W

MCA 1206 AT

0.250 W

0.400 W

Film temperature

125 °C

155 °C

Max. resistance change at rated dissipation for

resistance range:

MCT 0603 AT

47

Ω to 100 kΩ

47

Ω to 100 kΩ

MCU 0805 AT

47

Ω to 100 kΩ

47

Ω to 100 kΩ

MCA 1206 AT

47

Ω to 100 kΩ

47

Ω to 100 kΩ

|ΔR/R| max., after:

1000 h

≤ 0.1 %

≤ 0.2 %

8000 h

≤ 0.2 %

≤ 0.4 %

225 000 h

≤ 0.6 %

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