14D331K MOV Varistor 330V

14D331K MOV varistor (330V), also known as VDR-14D331K, is designed for DC and industrial systems operating at higher voltage levels where strong surge protection is required.

Compared with 14D301K, this model provides increased voltage margin, making it suitable for applications around 300V–330V DC systems with improved stability under transient conditions.

Typical Use Case:

This model is commonly used in industrial power supplies, automation systems, communication equipment and embedded electronics to protect against switching surges, ESD and transient voltage spikes.

The 14mm disc design ensures robust surge capability and stable long-term performance under repetitive stress conditions.

Key Electrical Characteristics:

Varistor Voltage (1mA): 330V ±10%  

Maximum Continuous Voltage: 210VAC / 275VDC  

Maximum Clamping Voltage: approx. 550V  

Peak Surge Current (8/20μs): 4.5kA  

Maximum Energy (2ms): 220J  

Capacitance (1kHz): approx. 610pF  

Application Focus:

DC power systems (300V–330V)  

Industrial automation equipment  

Communication electronics  

Embedded control systems  

Signal line protection  

Design Tips:

* Select MOV voltage with sufficient margin above working voltage  

* Install close to power entry points or sensitive components  

* Combine with TVS diodes for improved transient suppression  

Engineering Insight:

14D331K is typically selected for higher voltage DC systems where stable clamping and strong surge absorption are required. It performs reliably in circuits exposed to frequent voltage fluctuations.

Comparison Insight:

Comparable to Bourns MOV-14D331K and MOV-14D331KTR , this model can be used as an alternative solution for similar voltage protection requirements.

Related MOV Varistor Models:

14D330K MOV Varistor

14D390K MOV Varistor

14D471K MOV Varistor

Reference Models:  

MOV-14D331K   Bourns

MOV-14D331KTR   Bourns

For general-purpose designs, 14D471K is widely used.  

For low voltage applications, 14D330K is recommended.  

All trademarks and part numbers are used for reference only.

For datasheet, quotation or sample request:  

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