
1997 Nov 04 92
Philips Components
Leaded ceramic multilayer capacitors General data
Class 2 capacitors
After manufacture, each capacitor is checked on capacitance, tan δ and test voltage. Apart from this the following quality
checks are carried out by frequent inspections.
Essentially all tests mentioned in the schedule of
“IEC publication 384-9”
, categories 55/125/21 and 10/85/21
respectively for X7R-2C1 and Z5U (temperature ranges −55/+125 °C and +10/+85 °C; damp heat, long term, 21 days)
are carried out in accordance with
“IEC publication 68”
.
Table 6 Test procedures and requirements
IEC 384-9
CLAUSE
IEC 68-2
TEST
METHOD TEST PROCEDURE REQUIREMENTS
4.1 pre-conditioning 1 hour; +150 °C; reference
measurement after 24 hours
4.5 robustness of
terminations:
pull-off pull velocity 15 cm/minute; load 5 N no lead breakage
Ua1tensile strength axial force 10 N no lead breakage
Ub bending load 5 N; 4 ×90°no lead breakage
4.7 Ta
method 1 solderability
(solder bath) 235 °C; 2 s good tinning
4.6 Tb
method 1A resistance to
soldering heat pre-conditioning: 260 °C; 10 s no visible damage
4.8 Na rapid change of
temperature pre-conditioning:
for X7R: −55/+125 °C; 5 cycles;
for Z5U: +10/+85 °C; 5 cycles
no damage
∆C/C after 24 hours:
X7R: ±≤10%
Z5U: ±≤20%
4.9 Fb vibration 10 to 55 to 10 Hz;
0.75 mm displacement;
3 directions; 6 hours
no visible damage
4.10 Eb bump 4000 bumps in 2 directions;
40 g; pulse time 6 ms no visible damage
inflammability 15 s; 35 mm above bunsen burner
with flame-height 40 to 60 mm self-extinguishing within 15 s
after removal of bunsen burner
resistance to
solvents 3 minutes ultrasonic washing in
trichloroethylene; 1 minute drying;
30 °C; 10 brush strokes
marking and colour code must
remain legible and not be
discoloured; no mechanical or
electrical damage or
deterioration of the material