Metal Oxide Varistor 680V 4.5KA DISC 14mm MOV-14D681K

Metal Oxide Varistor 680V 4.5KA DISC 14mm HEL-14D681K

The Metal Oxide Varistor (MOV) 680V 4.5 kA DISC 14 mm HEL-14D681K is a robust surge-protection component designed to safeguard electrical and electronic circuits from transient overvoltages such as spikes, surges, and inductive kickbacks. It is built with a disc-shaped ceramic body composed of zinc oxide grains mixed with other metal oxides, giving it highly nonlinear electrical characteristics. Under normal operating conditions, the varistor presents a high resistance, allowing regular current to flow with minimal leakage. However, when the voltage exceeds its threshold, the resistance drops dramatically and diverts excess energy away from sensitive circuitry.

This MOV has a nominal varistor voltage of 680 V, meaning it begins to conduct when voltage levels rise above this point, protecting components from damaging peaks. Its disc diameter of 14 mm enables a balance between energy-handling capability and compact size, making it suitable for many printed circuit board (PCB) applications. The radial leaded design allows straightforward through-hole mounting, which is common in both consumer and industrial equipment.

At the heart of its function is the ability to absorb high surge currents up to thousands of amperes in very short pulses and clamp the voltage to safer levels. When a transient event occurs, the MOV reacts within nanoseconds, protecting downstream electronics by shunting excess energy to ground. After the surge passes, it returns to its high-resistance state without interrupting normal operation. This makes the HEL-14D681K varistor an essential protective element in power supplies, control systems, and surge protector modules.

Features:

• High surge current handling capability for transient suppression.
• Nonlinear voltage-dependent resistance to clamp overvoltages.
• Fast response time to voltage spikes.
• Bidirectional protection characteristics.
• Compact 14 mm disc package for PCB mounting.
• Radial leaded design for secure through-hole installation.

Specifications:

Applications:

• Surge protection in AC and DC power circuits.
• Transient voltage suppression in consumer electronics.
• Protection for power supply units and PCBs.
• Lightning and switching surge mitigation in industrial systems.
• Safeguard for communication and data equipment circuits.

Package Contents:

• 1x Metal Oxide Varistor 680V 4.5KA DISC 14mm HEL-14D681K

Datasheet