Multilayer Chip Varistors and Leaded MOVs for Transient Voltage Protection

Metal oxide varistors are used to protect electronic circuits from transient overvoltage and electrostatic discharge.
Multilayer chip varistors provide low-voltage protection in surface mount designs,
while leaded MOVs are used for higher energy absorption in through-hole assemblies.
These components are commonly applied in consumer electronics and automotive subassemblies.

Multilayer Chip Varistor Characteristics

Multilayer chip varistors are designed for low working voltage applications with compact package sizes.
They support operating temperatures from -55°C to +125°C and are available in multiple standard chip dimensions for high-density PCB layouts.
Low leakage current and stable electrical characteristics are required for signal line protection.

• Operating temperature: -55°C to +125°C
• Working voltage range: 3.3 V to 68 V
• Low leakage current
• RoHS compliant structure
• Package sizes: 0402, 0603, 0805, 1206, 1210, 1812, 2220

Function in Transient Suppression

In signal and low-voltage power lines, chip varistors clamp transient spikes by reducing their impedance during overvoltage events.
This behavior helps protect IC inputs and communication interfaces from ESD and switching transients.

• Clamping of ESD and surge transients
• Bidirectional protection for signal lines
• Fast response to voltage spikes
• Suitable for compact SMT layouts

Leaded MOV Options for Higher Energy

For applications requiring higher surge energy handling, leaded varistors are used.
Multiple disc size codes provide different energy absorption capabilities and mechanical configurations for through-hole mounting.

• Disc size codes from TSV05D to TSV40D
• Wide range of varistor voltage codes
• Through-hole mounting for power circuits
• Used in mains and higher energy environments

Applications

• Cellular telephones
• Automotive electronic subassemblies
• Signal line ESD protection
• Power line surge suppression
• Consumer electronic devices

Design Considerations

• Select chip varistors for low-voltage signal protection
• Use leaded MOVs for higher surge energy requirements
• Match working voltage to system operating voltage
• Verify package size and PCB layout constraints
• Ensure compliance with environmental and safety standards

For detailed electrical specifications and dimensional data, refer to the corresponding multilayer chip varistor and TSV leaded varistor datasheets.

For design-in support and technical inquiries, please contact:

sales@suntan.com.hk

info@suntan.com.hk