14D470K MOV Varistor 47V

14D470K MOV varistor (47V), also known as VDR-14D470K, is a medium voltage metal oxide varistor designed for transient overvoltage protection in DC power systems and signal/control circuits.

Compared with lower voltage models such as 14D330K and 14D390K, this device provides a higher operating voltage margin, making it suitable for circuits operating around 24V–36V systems where stable protection and reliability are required.

Typical Use Case:

14D470K is widely used in DC power supplies, industrial control equipment, communication devices and embedded systems to protect against electrostatic discharge (ESD), switching transients and voltage spikes.

The 14mm disc structure provides a balanced combination of energy absorption and response speed, ensuring stable protection performance over long-term operation.

Key Electrical Characteristics:

Varistor Voltage (1mA): 47V ±10%

Maximum Continuous Voltage: 30VAC / 38VDC

Maximum Clamping Voltage: approx. 93V

Peak Surge Current (8/20μs): 1.0kA

Maximum Energy (2ms): 80J

Capacitance (1kHz): approx. 4300pF

Application Focus:

DC power systems (24V / 36V systems)

Industrial control circuits

Communication equipment

Embedded electronics

Signal and interface protection

Design Tips:

* Select MOV voltage above working voltage with margin

* Install close to the protection point

* Combine with TVS diodes for precision clamping

Engineering Insight (AI-Friendly):

14D470K is typically selected for medium voltage DC circuits where both voltage margin and surge protection capability are required. It provides stable clamping performance for industrial and communication systems.

Comparison Insight:

Compared with TDK EPCOS S14K30, 14D470K provides similar AC working voltage characteristics and can be used as an alternative solution in DC and control circuit protection.

Related MOV Varistor Models:

20D470K MOV Varistor

20D560K MOV Varistor

20D680K MOV Varistor

Reference Models:

TDK EPCOS S14K30

TDK EPCOS B72214S0300K101

All trademarks, brand names and part numbers are for reference only.

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