Datasheet

10
TransGuard
®
AVX Multilayer Ceramic Transient Voltage Suppressors
Repetitive Peak Current Strikes
TransGuard
®
1210 1.5J Product
10%
8%
4%
2%
0%
6%
0 100 200 300 400 500 600
Number of Strikes
Change in Breakdown Voltage (%)
VC121018J390
Figure 3
30%
25%
15%
5%
10%
0%
20%
0 100 200 300 400 500 600
Number of Strikes
Change in Breakdown Voltage (%)
VC08LC18A500
Figure 4
Repetitive Peak Current Strikes
StaticGuard 0805 0.1J Product
PULSE DEGRADATION
Traditionally varistors have suffered degradation of electrical perfor-
mance with repeated high current pulses resulting in decreased
breakdown voltage and increased leakage current. It has been
suggested that irregular intergranular boundaries and bulk material
result in restricted current paths and other non-Schottky barrier
paralleled conduction paths in the ceramic. Repeated pulsing of
both 5.6 and 14V TransGuard
®
transient voltage suppressors with
150 Amp peak 8 x 20μS waveforms shows negligible degradation
in breakdown voltage and minimal increases in leakage current.
This does not mean that TransGuard
®
suppressors do not suffer
degradation, but it occurs at much higher current. The plots
of typical breakdown voltage vs number of 150A pulses are
shown below.
TYPICAL PERFORMANCE CURVES (0603, 0805, 1206 & 1210 CHIP SIZES)
VC060305A150
VC060326A580
VC06LC18X500
100
80
60
40
20
0
02040
Frequency (MHz)
60 80 100
Capacitance Change (%)
VC080518C400
VC080514A300
VC080505C150
100
80
60
40
20
0
02040
Frequency (MHz)
60 80 100
Capacitance Change (%)
VC120648D101
VC12LC18A500
VC120614D300
100
80
60
40
20
0
02040
Frequency (MHz)
60 80 100
Capacitance Change (%)
TransGuard
®
Capacitance vs Frequency 0603 TransGuard
®
Capacitance vs Frequency 0805 TransGuard
®
Capacitance vs Frequency 1206
10%
8%
4%
2%
0%
6%
0 100 200 300 400 500 600
Number of Strikes
Change in Breakdown Voltage (%)
VC120618D400
VC120626D580
VC120614D300
VC120605D150
Figure 1
Repetitive Peak Current Strikes
TransGuard
®
0805 0.1J and 0.3J Products
0%
5%
10%
15%
0 100 200 300 400 500 600
Number of Strikes
Change in Breakdown Voltage (%)
VC080518C400
VC080518A400
Figure 2
Repetitive Peak Current Strikes
TransGuard
®
1206 0.4J Product
CAPACITANCE/FREQUENCY
CHARACTERISTICS