Varistor EB981296235 350VAC / 450VDC surge protector component

Varistor EB981296235 350VAC / 450VDC surge protector component is a metal-oxide varistor designed to clamp transient overvoltages and protect electronic circuits from voltage spikes. Rated for continuous use up to 350VAC and 450VDC, this component responds rapidly to surges, diverting excess energy away from sensitive parts of a system to reduce the likelihood of damage and support long-term reliability in power supplies and industrial electronics.

Advantages

The varistor offers fast transient suppression with a compact footprint suitable for PCB mounting and assemblies. Its voltage ratings provide a balance between protection level and normal-line tolerance, helping to minimize nuisance clamping while still reacting to harmful spikes. The device is passive, requires no external control, and can be combined with other protection elements such as fuses or gas discharge tubes for coordinated surge protection.

Suitable for

• Power supply surge protection
• Industrial control equipment and drives
• Consumer and professional electronic assemblies
• Input protection for converters and rectifiers
• General voltage suppression on PCBs

Key specifications

• Clamping function: metal-oxide varistor (MOV)
• AC voltage rating: 350 VAC (continuous)
• DC voltage rating: 450 VDC (continuous)
• Surge response: fast, nonlinear resistance change at threshold voltage
• Mounting style: PCB-compatible component
• Typical use: transient overvoltage suppression for single- and multi-line circuits

How to use

Place the varistor across the line to be protected (for example line-to-line or line-to-ground) according to the circuit design and safety standards applicable to your product. Ensure correct spacing and clearance on the PCB to meet creepage and clearance requirements at the expected working voltages. Combine the varistor with appropriate series elements, fusing or thermal protection if repeated or sustained surges are possible. Observe power-dissipation limits and provide mechanical support if the application subjects the component to vibration or mechanical stress.

Usage recommendations

Select a varistor with a voltage rating suited to the nominal system voltage to avoid premature conduction during normal operation. For critical applications, verify energy-handling capability and specify proper end-of-life considerations: varistors that have absorbed repeated large transients may change characteristics and should be inspected or replaced as part of preventive maintenance.