MOV-20D621K Metal Oxide Varistor Thakor (VCRR)

Product Description

MOV-20D621KMetal Oxide Varistor by Thakor (VCRR)

ProductDescription

The MOV-20D621K is a Metal Oxide Varistor(MOV) designed to protect electronic circuits and electrical systems fromvoltage surges and transient events. This varistor provides effectiveovervoltage suppression by clamping excess voltage levels and absorbinghigh-energy pulses. It is suitable for both AC and DC circuits, making it aversatile component for industrial, commercial, and residential applications.

TechnicalDetails

1. Model: 20D621K
2. Varistor Voltage (V): 620V
3. Maximum Continuous Voltage:
• AC: 385V
• DC: 505V
4. Clamping Voltage: 1,025V (at a current of 50A)
5. Energy Absorption Capability: 220J
6. Maximum Surge Current: 6,500A (8/20 µs waveform)
7. Operating Temperature Range: -40C to +85C
8. Disc Diameter: 20mm (standard for the "20D" series).
9. Leads: Radial leads, tin-plated for secure soldering and corrosion resistance.
10. Compliance: RoHS and UL recognized for safety and environmental standards.

Key Uses

1. Surge Protection in Electronics:
   Used in power supplies, adapters, and PCB designs to protect circuits from transient surges caused by lightning strikes, switching events, or power disturbances.
2. AC Line Protection:
   Often installed in home appliances (air conditioners, refrigerators, and washing machines) and industrial equipment to protect against voltage spikes.
3. Telecommunications Equipment:
   Protects telephone lines, modems, and signal transmission circuits.
4. Automotive Electronics:
   Safeguards sensitive circuits in automotive applications such as ECUs, infotainment systems, and battery management systems.
5. General Overvoltage Protection:
   Used in relays, sensors, and measuring instruments to ensure durability and reliability.

Benefits

1. High Surge Current Capability:
   Protects devices from high-energy transients, ensuring reliable operation.
2. Fast Response Time:
   MOVs respond within nanoseconds, clamping voltage spikes before they can damage sensitive components.
3. Cost-Effective Solution:
   Economical protection compared to other overvoltage solutions like TVS diodes or gas discharge tubes.
4. Versatile Applications:
   Works effectively in AC and DC circuits, enhancing its usability across industries.
5. Compact Design:
   The radial-lead package enables easy integration into space-constrained PCB layouts.

ComparableBrands and Part Numbers

If the MOV-20D621K by Thakor (VCRR) isunavailable, the following equivalent parts from other brands can beconsidered:

1. Littelfuse
• Part Number: V20E385
• Specifications: Similar energy absorption and voltage ratings; widely used for surge suppression.
2. TDK
• Part Number: B72220S0381K101
• Specifications: Offers excellent clamping characteristics and surge handling.
3. EPCOS (TDK Group)
• Part Number: S20K385
• Specifications: Similar diameter (20mm) with nearly identical voltage and energy ratings.
4. Panasonic
• Part Number: ERZ-V20D621
• Specifications: Comparable varistor voltage and surge current ratings.
5. General Electric (GE)
• Part Number: V385LA20A
• Specifications: Meets industrial and consumer surge protection requirements.

ConsiderationsWhen Selecting a Replacement

• Match the varistor voltage (V) to your application to ensure proper operation.
• Ensure the replacement has a clamping voltage and energy absorption capacity equal to or higher than the original.
• Verify compatibility with operating temperatures and environmental conditions.
• Confirm compliance with applicable certifications (e.g., UL, RoHS).

If additional technical details or designrecommendations are needed, feel free to ask!