TransGuard
®
AVX Multilayer Ceramic Transient Voltage Suppressors
TYPICAL PERFORMANCE CURVES
(0402 CHIP SIZE)
VOLTAGE/CURRENT CHARACTERISTICS
Multilayer construction and improved grain structure result in
excellent transient clamping characteristics up to 20 amps
peak current, while maintaining very low leakage currents
under DC operating conditions. The VI curves below show the
voltage/current characteristics for the 5.6V, 9V, 14V, 18V and
low capacitance StaticGuard parts with currents ranging from
parts of a micro amp to tens of amps.
PULSE DEGRADATION
Traditionally varistors have suffered degradation of electrical
performance with repeated high current pulses resulting in
decreased breakdown voltage and increased leakage cur-
rent. 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 TransGuard
®
tran-
sient voltage suppressors with 150Amp 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.
100
VC04LC18V500
VC040218X400
VC040214X300
VC040209X200
VC040205X150
80
ESD TEST OF 0402 PARTS
35
VC04LC18V500
30
BREAKDOWN VOLTAGE (Vb)
Voltage (V)
60
40
20
0
10
-9
25
VC040218X400
10
-7
10
-5
10
-3
10
-1
10
10
3
10
5
Current (A)
20
VC040214X300
15
VC040209X200
10
PEAK POWER VS PULSE DURATION
1300
1200
VC040205X150
5
1100
1000
900
PEAK POWER (W)
800
700
-5
600
500
400
300
200
100
0
10
100
IMPULSE DURATION (μS)
1000
-25
0.01
dB
-10
VC040218X400
VC040214X300
VC040209X200
VC04LC18V500
VC040205X150
10
100
1000
10000
8kV ESD STRIKES
INSERTION LOSS CHARACTERISTICS
0
VC04LC18V
VC040218X
-15
VC040214X
VC040209X
VC040205X
-20
0.1
Frequency (GHz)
1
10
6
AVX [ AVX CORPORATION ]
