Sharma Ceramic Capacitors
Page 3
Reliability and Test Conditions
Parameter
Specification
Test Method
Parameter
Specification
Test Method
Moisture Resistance
Test - Capacitance
change
Class(I):
Capacitance
Within tolerance specified in
the part number
Class(I)
C<30 pF: Q≥400+20xC
C30 pF: Q>1000
Class(II)
X7R: DF≤3%, Z5U:
DF≤3%, Y5V: DF≤5%
C≤50,000 IR: >10 G Ohms
C≤50,000 IR: >500 Ohms.F
Class(I)
C≤1000 pF: 1 MHz. ±10%
0.5 to 5 V rms
C>1000 pF: 1 KHz. ±10%
1.0 ±0.2 V rms
Class(II)
No more than ±5% or ±0.5 pf
which ever is more.
Class(II):
X7R: ±10% max.
Z5U & Y5V: ±30% max.
Class(I)
C<10 pF: Q≥200+10xC
10 pF≤ C < 30 pF
Q≥275+2xC:
C≥30 pF: Q≥350
Class(II)
The capacitor shall be
Dissipation Factor
(Tan d and Q)
subjected to 40 °C and 90 to
95% RH for 500 hours. After this,
samples shall be
kept in room temperature for
24 hrs. (Class I) or 48 hrs.
(Class II), and them shall be
measured (Class I) or 48
hours (Class II) and then
measured for the parameters
indicated.
Moisture Resistance
Test - Q or DF
1 KHz. ±10%, 1.0 ±0.2 V rms
Insulation Resistance
(IR)
Apply rated voltage fro 60
seconds at room temperature
and normal humidity
(70% max.)
X7R: DF≤5%
Dielectric
Withstanding Voltage
There shall be no evidence
of damage or flash over
during the test.
Apply rated voltage (Class I) or
2.5 x rated voltage (Class II) to
both terminations for 5
seconds. Charge and
discharge current are less hat
50 mA.
After soldering capacitor on
the glass-epoxy PWB, 50 gms
of steady pull is applied in
direction of arrow for 10
seconds. ( See Figure 1)
After soldering capacitor on
the glass-epoxy PWB, 2 mm
of bending shall be applied for
10 seconds as shown in the
drawing. ( See Figure 2)
Z5U & Y5V: DF≤7.5%
1000 M Ohms or 50 Ohms.F
whichever is less
Class(I):
No more than ±7.5% or ±0.75
pf which ever is more.
Class(II):
X7R: ±12.5% max.
Z5U, Y5V: ±30% max.
Class(I)
C<30 pF: Q≥ 100+3xC
C ≥ 30 pF: Q≥200
Class(II)
Moisture Resistance
Test - IR
Humidity Load Test -
Capacitance change
The capacitor shall be
subjected to rated voltage at
40 °C and 90 to 95 % RH for
500 hours. Surge current shall
not exceed 50 mA. After this,
samples shall be kept in room
temperature for 24 hrs. (Class I)
or 48 hours (Class II), and
them shall be measured
Termination
Adherence
No mechanical damage
No mechanical damage
Humidity Load Test
Q or DF
Bend Strength
X7R: DF≤5%
(Class I) or 48 hours (Class II)
and then measured for the
parameters indicated.
Z5U & Y5V: DF≤7.5%
500 M Ohms or 25 Ohms.F
whichever is less
Class(I):
No more than ±2.5% or ±0.25
pf which ever is more.
Class(II):
X7R: ±7.5% max.
Z5U, Y5V: ±20% max.
Parts to meet the initial
specifications
Parts to meet the initial
specifications
Humidity Load Test -
IR
Temperature Cycling
Test - Capacitance
change
Life Test (High
Temperature Loading
test) - Capacitance
Change
Class(I):
No more than ±3% or ±0.3
pf which ever is more.
Class(II):
X7R: ±10% max.
Z5U, Y5V: ±30% max.
Class(I)
C<10 pF: Q≥200+10xC
10 pF≤ C < 30 pF
Q≥275+2xC:
C>30 pF: Q>350
Class(II)
Perform 5 cycles as follows:
1. Room temperature dwell for
15 minutes.
2. Minimum operating
temperature dwell for 30
minutes.
3. Room temperature dwell for
30 minutes.
4. Maximum operating
temperature dwell for 30
minutes.
Apply 2 x rated voltage at
maximum operating
temperature for 1000 hours.
The surge current shall not
exceed 50 mA. After this, the
samples shall be kept in room
temperature for 24 hours
(Class I) or 48 hours (class II)
and then measured for the
parameters indicated.
Life Test (High
Temperature Loading
test) - DF or Q
Temperature Cycling
Test - Q or DF
Temperature Cycling
Test - IR
X7R: DF≤5%
After the above testing
Z5U & Y5V: DF≤7.5%
1000 M Ohms or 50 Ohms.F
whichever is less
condition, samples shall be
kept in room temperature for
24 hrs. (Class I) or 48 hours
(Class II), and them shall be
measured (Class I) or 48 hours
(class II) and then measured
for the parameters indicated.
The capacitors are completely
immersed for 10 ±0.5 seconds
in the molten solder with a
temperature of 260±5°C solder.
Cladding material of outer-
electrode: Sn (~100%)
The capacitors are completely
immersed for 10 ±1.0 seconds
in the molten solder with a
temperature of 270±5°C solder.
Preheat before immersion,
1. 80 to 100 °C for 2 minutes
2. 150 to 180 °C for 2 minutes
The capacitance measurement
shall be made after the
Life Test (High
Temperature Loading
test) - IR
Figure 1
Solderability
Termination area shall be at
least 75% covered with a new
solder coating. There shall be
no crack and ceramic
exposure of terminated
surface due to melting.
No more than ±2.5% or ±0.25
pf which ever is more.
Class(II):
Resistance to Solder
Heat Test -
Capacitance Change
X7R: ±7.5% max.
Figure 2
Z5U, Y5V: ±20% max.
Parts to meet the initial
specifications
Parts to meet the initial
specifications
Resistance to Solder
Heat Test - Q or DF
Resistance to Solder
Heat Test - IR
samples have been kept at
room temperature for 24 hours.
Class II Dielectric Code Explanation
Low temperature
High Temperature MAX. Capacitance change over
Third Symbol
First symbol
Second symbol
requirement
+10 deg. C
-30 deg. C
requirement
+45 deg. C
+65 deg. C
+85 deg. C
+105 deg. C
+125 deg. C
temperature
+1.0%
+/- 1.5%
+/- 2.2%
+/- 3.3%
(a letter)
(a number)
(a letter)
Z
Y
X
2
4
5
6
7
A
B
C
D
E
F
-55 deg. C
+/- 4.7%
+/- 7.5%
P
R
S
T
U
V
+/- 10.0%
+/- 15.0%
+/- 22.0%
+22%, -33%
+22%, -56%
+22%, -82%
Tel: (949)642-7324
SECI Engineers & Buyers' Guide
Fax: (949)642-7327
