1999 Apr 29 184
BC Components Product specification
Metallized polyester film capacitors MKT 370/371/372/373
CONSTRUCTION
Description
•Low-inductive wound cell of metallized polyethylene
terephthalate (PETP) film, potted with epoxy resin in a
blue flame-retardant case
•Radial leads, solder-coated:
– Copper clad steel wire (dt=0.5 or 0.6 mm)
– Copper wire (dt=0.8 mm)
•Small stand-off pips allow removal of solder flux etc.
during cleaning of the printed-circuit board.
Mounting
NORMAL USE
The capacitors are designed for mounting on
printed-circuit boards. The capacitors packed in bandoliers
are designed for mounting on printed-circuit boards by
automatic insertion machines.
For detailed tape specifications refer to this handbook,
chapter
“Packaging information”
.
Fig.21 Construction.
handbook, halfpage
connecting wire
metallized polyester film
metal spray layer
CBA073
SPECIFIC METHOD OF MOUNTING TO WITHSTAND VIBRATION
AND SHOCK
In order to withstand vibration and shock tests, it must be
ensured that the stand-off pips are in good contact with the
printed-circuit board:
•For pitches of ≤15 mm capacitors shall be mechanically
fixed by the leads.
•For larger pitches the capacitors shall be mounted in the
same way and the body clamped.
SPACE REQUIREMENTS ON PRINTED-CIRCUIT BOARD
The maximum length and width of film capacitors is shown
in Fig.22:
•Eccentricity see Fig.22. The maximum eccentricity is
smaller than or equal to the wire diameter of the product
concerned.
•Product height with seating plane as given by
“IEC 60717”
as reference: hmax ≤h+0.3 mm.
Storage temperature
•Storage temperature: Tstg =−25 to +40 °C with RH
maximum 80% without condensation.
RATINGS AND CHARACTERISTICS REFERENCE
CONDITIONS
Unless otherwise specified, all electrical values apply to an
ambient free air temperature of 23 ±1°C, an atmospheric
pressure of 86 to 106 kPa and a relative humidity of
50 ±2%.
For reference testing, a conditioning period shall be
applied over 96 ±4 hours by heating the products in a
circulating air oven at the rated temperature and a relative
humidity not exceeding 20%.
Fig.22 Lay-out..
handbook, halfpage
bmax =
b + 0.3 mm
lmax =
l + 0.3 mm
CBA116
eccentricity