14D471K Alternative / Equivalent / Replacement

YINT Electronics — 14mm Metal Oxide Varistor, 470V

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1. Introduction

The 14D471K is a 14mm disc metal oxide varistor (MOV) with a varistor voltage of 470V. It provides higher surge current and energy absorption compared to the 10mm version, making it suitable for applications requiring more robust overvoltage protection. The rated AC voltage is 300V and DC voltage is 385V.

The 14D471K follows the industry-standard 14D varistor series used by Littelfuse, Epcos (TDK), Panasonic, Meritek, Joyin, and other manufacturers. YINT Electronics manufactures this model as a fully compatible replacement with identical electrical specifications. The device responds in under 25 nanoseconds and delivers up to 6000A peak surge current (8/20µs waveform).

YINT manufactures the 14D471K using high-purity zinc oxide ceramic formulations with automated disc sorting and surge current sampling on every production batch. This manufacturing discipline ensures each 14D471K meets its 470V varistor voltage and 6000A surge current rating over the full -40C to +85C operating range. YINT 19 years of varistor manufacturing experience delivers robust protection for industrial applications.

Engineers searching for a 14D471K replacement or 14D471K alternative can specify the YINT 14D471K as a direct drop-in equivalent. It offers higher energy handling capacity for industrial power supplies, motor drives, and AC mains protection applications where the 10mm disc is insufficient.

2. Product Overview

The 14D series is a popular mid-range varistor disc size for applications requiring higher surge current than 10mm discs can provide. It covers varistor voltages from 18V to 1800V in a 14mm disc package. Each part delivers 6000A peak surge current for demanding overvoltage protection in industrial and commercial equipment.

The 14D471K is a 470V rated variant for protecting 300V AC or 385V DC circuits. Its larger 14mm disc diameter provides significantly higher energy absorption than the 10D471K while maintaining the same voltage ratings. When an overvoltage transient occurs, the 14D471K clamps the surge by conducting current and absorbing the transient energy through its larger zinc oxide ceramic element.

YINT produces the full 14D series from 18V through 1800V. This complete voltage coverage lets customers source all 14mm disc varistor needs from one manufacturing partner. The 14D471K uses high-quality zinc oxide ceramic elements with tight process controls for consistent varistor voltage and energy absorption across every production lot. Its larger disc delivers 2.4x the surge current of the 10D471K.

Every YINT 14D471K varistor undergoes 100% voltage classification and surge current sampling per IEC 61051-1 standards. This guarantees consistent 6000A peak surge current capability and uniform V1mA tolerance across all production batches. YINT's mature manufacturing process ensures reliable overvoltage protection for demanding industrial applications.

3. Key Features

• Disc Diameter: 14mm — Medium radial leaded disc for higher energy applications
• Varistor Voltage: 470V — Tight tolerance of ±10%
• AC Voltage Rating: 300V — Suitable for 220-240V AC mains protection
• DC Voltage Rating: 385V — For DC rail overvoltage clamping
• Peak Surge Current: 6000A — 8/20µs waveform, single pulse
• Nominal Surge Current: 3000A — 8/20µs waveform, rated
• Max Energy Absorption: 140J — 2ms waveform typical
• Response Time: < 25ns — Fast clamping for transient events
• Operating Temperature: -40°C to +85°C — Wide industrial range
• RoHS Compliant — Lead-free and environmentally friendly

4. Specifications

5. Cross Reference

The 14D471K is an industry-standard varistor produced by multiple manufacturers worldwide. YINT's 14D471K is a direct drop-in replacement with identical or tighter electrical specifications. Engineers searching for a 14D471K equivalent can confidently choose YINT as a universal cross-reference option.

6. Comparison with Similar Models

Engineers often compare the 14D471K with smaller and larger disc sizes at the same voltage rating. The table below shows key differences to help select the right 14D471K alternative for each design.

The 14D471K provides a strong balance of surge current, energy absorption, and board space for 300V AC applications. It delivers 2.4x the surge current of the 10D471K while being smaller than the 20D471K. Choose the 14D471K when your application needs robust overvoltage protection for 220-240V AC mains and the 10mm disc is not sufficient but board space limits using a 20mm disc.

YINT stocks the 14D471K in full production quantities with short lead times. Volume pricing and free samples are available for evaluation. Contact YINT for datasheets and cross-reference verification.

7. Applications

• Industrial power supply 300V AC mains input surge protection
• Motor drive and VFD input overvoltage clamping
• Welding equipment and heavy machinery AC power protection
• UPS and inverter systems requiring higher surge current handling
• Commercial HVAC and refrigeration system power input
• Telecom rectifier and base station power supply protection
• Solar inverter AC side surge protection
• Elevator and escalator control system power protection
• Industrial battery charger AC input transient clamping
• Data center PDU and rack power distribution protection
• Medical imaging equipment power input protection
• Water treatment and pump control system protection
• CNC machine tool and automation controller AC power protection
• Food processing and packaging equipment power input clamping
• Industrial oven and furnace controller AC power protection

8. Why Choose YINT

• 19+ years of manufacturing expertise in circuit protection since 2006
• 40+ patents and certifications with robust quality control
• Global sales network serving North America, Europe, Asia, and Latin America
• Full 14D series from 18V to 1800V for one-stop disc varistor sourcing
• Direct OEM replacement — pin-to-pin compatible with all major brands
• Engineering team available for cross-reference verification and support
• Free samples for testing and qualification upon request
• Direct manufacturer pricing with volume discounts available
• RoHS and REACH compliant with UL 1449 recognized component design
• UL 1449 recognized varistor component for safety-certified equipment

9. Ordering Information

10. FAQ

Q1: Is YINT 14D471K a direct replacement for Littelfuse V14E300P or Epcos B72214S2301K101?
A: Yes. YINT 14D471K has identical electrical specs and 14mm disc dimensions. It is a direct drop-in replacement.

Q2: What is the difference between 14D471K and 10D471K?
A: Both have 470V varistor voltage and 300V AC rating. 14D471K has a 14mm disc with 6000A Imax vs 2500A for the 10mm version.

Q3: What is the maximum surge current for 14D471K?
A: 6000A peak surge current for an 8/20µs waveform (single pulse). The nominal rated current is 3000A.

Q4: What is the energy rating of 14D471K?
A: 140J typical for a 2ms waveform, about 2.5x higher than the 10D471K.

Q5: Can 14D471K replace 10D471K on an existing PCB?
A: Not directly. The 14mm disc has a larger footprint and different lead spacing. You need to verify PCB compatibility.

Q6: What is the operating temperature range of 14D471K?
A: -40°C to +85°C, suitable for industrial and outdoor applications.

Q7: Does YINT provide free samples?
A: Yes. Contact YINT with your project details for sample requests and qualification support.

11. Conclusion

YINT Electronics' 14D471K is a high-performance metal oxide varistor for 300V AC applications requiring 6000A surge current capability. It delivers 2.4x the surge handling of the 10D471K with the same 470V varistor voltage in a 14mm disc package.

With 19+ years of varistor manufacturing experience, YINT delivers the 14D471K with competitive pricing, short lead times, and full technical support. Every order benefits from mature ceramic processing and rigorous quality control refined over nearly two decades of circuit protection manufacturing.

Contact YINT Electronics at global@yint.com.cn for datasheets, samples, or pricing. Our engineering team is ready to assist with cross-references and application support.