1998 Mar 27 14
Philips Components Preliminary specification
Film dielectric trimmers 2222 808 .....
∅7.5 mm
FEATURES
•Housing diameter 7.5 mm
•For a basic grid of 2.54 mm (0.1")
or 2.50 mm
•Top and bottom or top adjustment
•Vertical and horizontal versions
•Round or hexagonal head.
APPLICATIONS
•For consumer and industrial
equipment.
DESCRIPTION
The vanes of the trimmer are stacked
on a sturdy plastic base. The colour of
the base indicates the maximum
capacitance (see Table 2). The
dielectric is a film of polypropylene
(PP), polyethylene (PE),
polycarbonate (PC),
polytetrafluorethylene (PTFE), or
polyethyleneterephtalate (PET) which
supports the vanes in such a way that
good stability is ensured and no
microphony can occur.
Flux absorption between the vanes is
prevented.
Cleaning with solvents is not advised.
Versions are available with either a
vertical spindle (see Fig.1), or a
horizontal spindle (see Fig.2). Both
versions have top adjustment by
means of a screwdriver or trimming
key and bottom adjustment by means
of a key as shown in Fig.5.
For outline drawings and dimensions
see Figs 1 and 2.
QUICK REFERENCE DATA
DESCRIPTION VALUE
Cmin/Cmax 1.4/5.5 to 3/50 pF
Rated voltage (DC) 250 V
Test voltage (DC) for 1 minute 500 V
Maximum contact resistance 10 mΩ
Minimum insulation resistance 10000 MΩ
Category temperature range:
PP −40 to +70 °C
PE, PC, PTFE, PET −40 to +85 °C
Climatic category (IEC 60068):
PP 40/070/21
PE, PC, PTFE, PET 40/085/21
Minimum storage temperature −55 °C
Related specification IEC 60418-1 and 4
QUALITY LEVEL
Sampling and data evaluation for quality level in accordance with
“MIL-STD-105D”
and
“IEC 60410”
:
<0.15% major defects
<0.65% minor defects.
Each capacitor is tested for minimum Cmax and is also subjected to the full
test voltage.
MECHANICAL DATA
DESCRIPTION VALUE
Effective angle of rotation 180°
Operating torque:
Cmax <33 pF 1 to 15 mNm
Cmax ≥33 pF 1 to 25 mNm
Maximum axial thrust 2 N