RFI TC.PATC SR CM 03 M 69

SPECIFICA DEI REQUISITI DI SISTEMA SCMT
Volume 3 - SottoSistema di Bordo Appendice B - Requisiti di
Architettura, Interfaccia, Ambiente e RAMS
SCMT Codifica: RFI TC.PATC SR CM 03 M 69 F FOGLIO
134 di 138
DEFINITION OF THE DERATING FACTOR R
4 TERMINALS METAL FILM RESISTORS
ACTUAL POWERDISSIPATIO N(*)
R =
RATEDPOWERDISSIPATIO NAT 70°
C
ACTUAL WORKING VOLTAGE
R =
RATED WORKING VOLTAGE
MAX R
0.4
0.8
SURFACE TEMPERATURE < 100°C
(*) POWER DISSIPATION = POWER DISSIPATED
IN THE RESISTANCE ELEMENT ADDED TO THE
POWER DISSIPATED IN THE TERMINALS
RESISTANCE.
4 TERMINALS ALUMINIUM ELECTROLYTIC
CAPACITORS
ACTUAL WORKING VOLTAGE
R =
RATED WORKING VOLTAGE
R =
ACTUAL WORKING CURRENT
RATED WORKING CURRENT AT 100°
C
ACTUAL WORKING CURRENT (ACROSSTERMINAL)
R =
RATED WORKING CURRENT (ACROSSTERMINAL)
USE DEVICES WITH AN OPERATING LIFE AT 105°C
OF AT LEAST
4 TERMINALS FILM CAPACITORS
ACTUAL WORKING VOLTAGE
R =
RATED WORKING VOLTAGE AT 100°
C
R =
ACTUAL WORKING CURRENT
RATED WORKING CURRENT AT 100°
C
R MAX = 0,8
RMIN = 0,4
0.7
0.8
5000 h
0.5
0.7
ACTUAL WORKING CURRENT (ACROSSTERMINALS)
0.1
SPECIFIED MAX TEST CURRENT(ACROSSTERMINALS)
NOTE: Excessive voltage derating is not recomended for metallized film capacitors.
Applied voltage should be sufficently high (0.1 Volt or greater) and circuit series
resistance sufficently low (1 Kohm or less) to support self-healing phenomenon