ROV20-751K Equivalent & Substitute Parts

Part Overview

The ROV20-751K is a 750 V, 6.5 kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole disc configurations. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations. The part operates across a temperature range of -40°C to 125°C and is housed in a 20mm disc package suitable for PCB mounting applications.

Substiute Parts

ROV20-751K

Littelfuse Inc.In Stock: 734ROV20-751K Datasheet

Current PartRFQ

ERZ-V20D751

Panasonic Electronic ComponentsIn Stock: 1872ERZ-V20D751 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV20-751K is determined by strict alignment of electrical and mechanical parameters. The primary substitute, ERZ-V20D751 from Panasonic Electronic Components, maintains equivalence through the following criteria:

• Identical varistor voltage range (675 V minimum, 750 V typical, 825 V maximum)
• Identical maximum AC and DC voltage ratings (460 V AC, 615 V DC)
• Identical package and mounting configuration (Disc 20mm, Through Hole)
• Single circuit configuration matching the original design
• Compliance with RoHS3 and REACH requirements

Differences in surge current capacity (7.5 kA versus 6.5 kA) and energy rating (420 J versus 360 J) represent enhanced performance characteristics of the substitute, providing greater transient suppression capability within the same voltage and package specifications.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V20D751 is the designated manufacturer-recommended substitute for the obsolete ROV20-751K. Both components maintain identical voltage specifications and package configurations, ensuring direct compatibility in existing circuit designs. The substitute is classified as active product status, providing assured long-term availability and supply chain continuity.

Both parts satisfy RoHS3 and REACH compliance requirements, supporting regulatory obligations in manufacturing and distribution. The ERZ-V20D751 offers enhanced surge current handling (7.5 kA) and energy absorption (420 J) compared to the original specification, providing improved transient suppression performance without requiring circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V20D751 be used as a direct replacement for the ROV20-751K?

A: Yes. Both components share identical varistor voltage ratings (750 V typical), maximum AC/DC voltage specifications (460 V AC, 615 V DC), and 20mm disc through-hole package configuration. Electrical and mechanical compatibility is maintained.

Q: What are the differences between these two parts?

A: The ERZ-V20D751 provides higher surge current capacity (7.5 kA versus 6.5 kA) and greater energy absorption (420 J versus 360 J). These represent performance enhancements within the same voltage and package specifications.

Q: Are there any temperature range considerations?

A: The ROV20-751K operates from -40°C to 125°C, while the ERZ-V20D751 operates from -40°C to 85°C. Applications requiring operation above 85°C must retain the original ROV20-751K specification or identify alternative solutions.

Q: Do both parts meet regulatory requirements?

A: Yes. Both the ROV20-751K and ERZ-V20D751 are RoHS3 compliant and REACH unaffected, satisfying current regulatory standards for electronic component manufacturing and distribution.

Q: What is the capacitance difference between these parts?

A: The ROV20-751K has 554 pF capacitance at 1 kHz, while the ERZ-V20D751 has 600 pF at 1 kHz. This difference may be relevant in high-frequency applications where varistor capacitance affects circuit performance.