Through-hole varistor

Main Features:

A high‑performance, through‑hole metal oxide varistor (MOV) specially designed for AC power supplies and a wide range of electronic circuits. The device features a zinc oxide ceramic core encapsulated in an all‑epoxy seal, delivering exceptional transient overvoltage suppression and surge current‑discharge capabilities. When the circuit experiences abnormal overvoltages—such as lightning strikes, grid fluctuations, or switching transients—the varistor rapidly conducts within nanoseconds, clamping the overvoltage to a safe level and safeguarding downstream sensitive components from damage. Once the fault is cleared, it automatically returns to a high‑impedance insulating state, requiring no additional maintenance, making it a critical component for protecting power‑supply inputs in various electronic devices.

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Category:

Varistors

Keyword: Through-hole varistor

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Key Features

Ultra-fast response speed Response time < 25 ns, enabling rapid clamping of abnormal overvoltages at the nanosecond level and protecting sensitive electronic components from breakdown due to transient high voltages.
High Wave Surge Withstand Capability It can withstand a peak surge current of 1.2 kA (8/20 μs) and has an energy absorption capacity of up to 14 J, making it suitable for high-frequency surge‑impact applications.
Precise pressure-sensitive voltage control : Clamping voltage 220V ±10% (Class K accuracy), with low voltage deviation and stable clamping, suitable for a wide range of operating voltage requirements.
Superior Insulation and Protection Design : Fully encapsulated with epoxy resin, offering moisture resistance, corrosion protection, and arc‑flash suppression; designed to withstand harsh operating conditions, with an insulation resistance of ≥500 MΩ.
Stable operation over a wide temperature range Operating temperature range: -40°C to +85°C; storage temperature range: -40°C to +125°C; suitable for a wide range of temperature‑controlled applications, including industrial, automotive, and smart‑home environments.
Fully certified for environmental compliance. : The entire product line complies with RoHS and REACH environmental standards, supports safety certifications such as UL, cUL, TUV, and CQC, and meets global market compliance requirements.

Typical application scenarios

Consumer electronics sector : Overvoltage and surge protection for the AC input ports of power adapters, chargers, and small household appliances.
Industrial control field : Transient voltage suppression and circuit protection for PLC controllers, inverters, and industrial power modules.
Automotive electronics field : Lightning and overvoltage protection at the power input of vehicle-mounted power supplies and on-board charging equipment.
Smart home sector : Surge suppression and lightning protection for smart sockets, smart switches, and home appliance control boards.
Telecommunications equipment sector : Port overvoltage protection and transient interference suppression for switches, routers, and communication power supplies.

Technical Specifications

Model Specification: 07D221K (chip diameter 7 mm, radial through-hole package)
Clamping voltage (V₁mA): 220 V ±10% (Class K accuracy)
Maximum Continuous Operating Voltage (V_AC): Compatible with 140 V / 180 V / 242 V to meet diverse application requirements.
Clamping Voltage (@1A): Typical Value 360V
Peak surge current (8/20 μs): 1.2 kA
Energy absorption capacity: 14 J
Response time: <25 ns
Voltage-temperature coefficient: -0.5%/°C
Package type: Radial through-hole, epoxy resin encapsulation
Environmental Compliance: RoHS and REACH compliant, lead-free process
Certification Support: Supports safety certifications such as UL, cUL, TUV, and CQC (available upon request).

Customized Services

We offer end-to-end customized services and, based on your application scenarios and circuit design requirements, can provide the following tailored solutions:

Customization of varistor voltage, accuracy class, and package dimensions.
Customizable adaptation of pin pitch and pin configuration
Targeted support for safety certifications and environmental standards
We offer mass production and rapid delivery services, along with comprehensive technical support, product selection solutions, and test reports, helping customers efficiently complete their circuit protection designs.

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