VC040218X400WP AVX Corporation, VC040218X400WP Datasheet - Page 10

• Manufacturer Part Number: VC040218X400WP
• Description: VARISTOR TVS 18VDC 20A 0402 SMD
• Manufacturer: AVX Corporation
• Series: TransGuard®r

Specifications of VC040218X400WP

• Package / Case: 0402 (1005 Metric)
• Varistor Voltage: 25.5V
• Current-surge: 20A
• Number Of Circuits: 1
• Maximum Ac Volts: 13VAC
• Maximum Dc Volts: 18VDC
• Energy: 0.05J
• Voltage Rating Dc: 18 V
• Voltage Rating Ac: 13 V
• Clamping Voltage: 42 V
• Peak Surge Current: 20 Amps
• Surge Energy Rating: 0.05 J
• Capacitance: 65 pF
• Operating Temperature Range: - 55 C to + 125 C
• Current Rating: 1 Amp
• Dimensions: 0.5 mm W x 1 mm L x 0.6 mm H
• Mounting: SMD/SMT
• Product: MLV
• Termination Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 478-2546-2; VC040218X400WP

TransGuard
AVX Multilayer Ceramic Transient Voltage Suppressors
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
CAPACITANCE/FREQUENCY
CHARACTERISTICS
TransGuard
10
TYPICAL PERFORMANCE CURVES
100
80
60
40
20
0
0
VC06LC18X500
TransGuard
15%
10%
5%
0%
20
®
10%
8%
6%
4%
2%
0%
Capacitance vs Frequency 0603
Repetitive Peak Current Strikes
Repetitive Peak Current Strikes
0
TransGuard
0
Frequency (MHz)
40
100
100
®
0805 0.1J and 0.3J Products
200
Number of Strikes
60
200
Number of Strikes
®
Figure 2
VC060305A150
1206 0.4J Product
VC060326A580
Figure 1
®
300
transient voltage suppressors with
300
80
VC080518C400
VC080518A400
VC120618D400
VC120626D580
VC120614D300
VC120605D150
®
400
400
100
500
500
TransGuard
100
80
60
40
20
0
0
600
600
20
®
(0603, 0805, 1206 & 1210 CHIP SIZES)
Capacitance vs Frequency 0805
Frequency (MHz)
40
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
degradation, but it occurs at much higher current. The plots
of typical breakdown voltage vs number of 150A pulses are
shown below.
60
VC080505C150
VC080518C400
VC080514A300
80
Repetitive Peak Current Strikes
Repetitive Peak Current Strikes
30%
25%
20%
15%
10%
10%
5%
0%
8%
6%
4%
2%
0%
TransGuard
StaticGuard 0805 0.1J Product
100
0
0
100
100
TransGuard
100
80
60
40
20
0
0
®
200
200
Figure 4
Figure 3
Number of Strikes
Number of Strikes
1210 1.5J Product
®
20
Capacitance vs Frequency 1206
300
300
®
VC08LC18A500
suppressors do not suffer
Frequency (MHz)
40
400
400
VC121018J390
500
500
60
VC120614D300
VC120648D101
VC12LC18A500
600
600
80
100