Metal-Oxide Varistors14D Series for Surge Protection

Metal-Oxide Varistors (MOVs) 14D: Essential for Voltage Spike Protection

Metal-oxide varistors (MOVs) 14D series are crucial components in protecting electrical circuits from voltage spikes and transients. Acting as voltage-dependent resistors, MOVs exhibit a nonlinear resistance characteristic that adjusts based on the applied voltage, providing effective MOV surge protection.

N (Standard) Series

• MOV Varistor Element Diameter: 14mm

J (High Surge & High Energy) Series

• MOV Varistor Element Diameter: 14mm

Specifications:

• MOV surge protector Voltage: 18~1800V
• Max. Allowable Voltage: 10~1000V(AC) , 14~1465V(DC)
• Capacitance (Reference) @1KHz: 130-11100pf

• Applications of MOV Varistor

  MOV varistors are widely utilized in various applications, including:

  • Surge Protectors: Commonly integrated into power strips and surge protector devices to protect against voltage spikes.

  • Consumer Electronics: Used in devices such as televisions and computers to safeguard sensitive circuitry.

  • Industrial Equipment: Employed in machinery and control systems to prevent damage from electrical transients, providing essential MOV surge protection.

  • 

• Advantages of Metal-Oxide Varistors

  Metal-Oxide Varistors offer several critical advantages that make them indispensable in MOV surge protection applications:

  • Wide Voltage Range: MOV varistors are designed to handle a broad spectrum of voltages, ensuring compatibility with various electronic systems.

  • High Flow Capacity and Energy Tolerance: These components can manage significant transient currents, making them reliable MOV surge protectors in high-energy environments.

  • Significant Nonlinear Coefficient: The non-linear resistance characteristics of MOV varistors allow them to effectively clamp voltage spikes, providing robust MOV surge protection.

  • Minimal Leakage Current: MOV varistors exhibit low leakage current under normal operating conditions, ensuring energy efficiency and minimal impact on circuit performance.

  • Symmetrical Volt-Ampere Characteristics: Their symmetrical volt-ampere curve ensures consistent performance in both polarities, enhancing the reliability of the MOV surge protector.

  • Residual Voltage Suppression: MOV varistors are effective in suppressing residual voltage, protecting sensitive electronic components from damage.

  • Fast Response Time: With a rapid response to transient voltage surges, provide immediate MOV surge protection to safeguard electronics.

  • No Continuous Flow: prevent continuous current flow after clamping, reducing the risk of sustained overvoltage.

  • Excellent Voltage Ratio: The ability of MOV varistors to maintain a stable voltage ratio under varying conditions ensures reliable operation.

  • Strong Surge Absorption Capacity: can absorb and dissipate significant energy during surges, making them a key component in MOV surge protectors.

  • Efficient Surge Current Handling: efficiently handle high surge currents, providing consistent and reliable MOV surge protection.

  • Stable Suppression Characteristics: The suppression characteristics of mov surge protectors remain stable over time, ensuring long-term protection.

  • High-Quality Materials: Manufactured from premium materials, Metal-Oxide Varistors ensure durability and reliable performance.

  • Reliable Operation: The consistent performance of MOV varistors in various applications makes them a trusted choice for MOV surge protection.

  • Long Lifespan: Designed for longevity, provide durable protection over extended periods.

  • Versatile Applications: Metal-Oxide Varistors are suitable for a wide range of applications, from consumer electronics to industrial equipment, making them versatile MOV surge protectors.

Composition and Structure of MOV Varistor

MOV Varistor is primarily composed of zinc oxide (ZnO) combined with small amounts of other metal oxides such as bismuth, cobalt, and manganese. This composition forms a matrix of conductive grains separated by grain boundaries, creating diode-like junctions. These junctions allow MOV varistors to block current at low voltages and conduct at higher voltages, efficiently clamping transient voltages to a safe level, which is critical for reliable MOV surge protection.

Key Features of Metal-Oxide Varistors

MOV Varistor Operation

• At normal operating voltages, Metal-Oxide Varistors maintain high resistance, preventing current flow through the device.
• During a voltage spike, the resistance drops dramatically, allowing the MOV varistors to conduct and divert excess current away from sensitive circuit components.
• This behavior effectively shields devices from overvoltage conditions, such as those caused by lightning strikes or switching surges, ensuring robust mov surge protector.

Key Characteristics

• Voltage Rating: MOV varistors are rated for specific voltage ranges, determining their operational limits and clamping capabilities.

• Energy Rating: Defined in joules, this rating indicates how much energy the MOV surge protector can absorb during a transient event. It is usually specified using standard transient waveforms (e.g., 8/20 microseconds) to guarantee performance under expected conditions.

• Response Time: The response time of MOV varistors typically ranges from 40 to 60 nanoseconds for fast transients. This rapid response is vital for effective transient suppression and reliable MOV surge protection.

• Considerations for Use

When selecting an MOV varistor for a specific application, consider the following:

• Continuous Operating Voltage: Ensure the MOV varistor's voltage rating exceeds the normal operating voltage of the circuit.

• Surge Energy Rating: Choose an MOV surge protector with an appropriate energy rating to handle expected transients without failure.

• Configuration: MOV varistors can be connected in parallel for increased energy handling or in series for higher voltage ratings, enhancing MOV surge protection capabilities.

In summary, MOV varistors play a critical role in protecting electronic circuits from voltage transients, ensuring the longevity and reliability of electrical devices. Their unique properties and wide range of applications make them indispensable for effective MOV surge protection in modern electronics.

Varistor Naming rules

Varistor packing specifications