ROV07-751K-S Equivalent & Substitute Parts

Part Overview

The ROV07-751K-S is a 750V 1.2kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications with a 7mm disc package. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance across voltage ratings, surge current capacity, and thermal operating ranges while accommodating potential package geometry variations.

Substiute Parts

ROV07-751K-S

Littelfuse Inc.In Stock: 766ROV07-751K-S Datasheet

Current PartRFQ

VDRS07H460BSE

Vishay Beyschlag/Draloric/BC ComponentsIn Stock: 2400VDRS07H460BSE Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ROV07-751K-S is determined by strict alignment of the following electrical parameters:

• Varistor Voltage (Min/Typ/Max): 675V / 750V / 825V
• Current - Surge: 1.2 kA
• Maximum AC Volts: 460 V
• Maximum DC Volts: 615 V
• Number of Circuits: 1
• Mounting Type: Through Hole

The VDRS07H460BSE meets all mandatory electrical criteria. Package geometry differs (9mm disc versus 7mm disc), which may require mechanical validation in specific board layouts but does not affect electrical substitution compatibility. The substitute part is active in production status, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

The VDRS07H460BSE is a direct electrical substitute for the ROV07-751K-S based on matched varistor voltage ratings, surge current capacity, and AC/DC voltage limits. Both components are RoHS3 compliant and REACH unaffected, meeting regulatory requirements for equivalent component selection.

Considerations for implementation:

The substitute part features higher energy absorption (63J versus 45J), which provides enhanced transient suppression capability without compromising circuit protection. The operating temperature range of the substitute is narrower (-40 to 85°C versus -40 to 125°C); applications requiring operation above 85°C must retain the original part or identify alternatives with extended temperature ratings.

Package geometry differs by 2mm in disc diameter (9mm versus 7mm). Board layout validation is required to confirm mechanical fit within existing through-hole mounting positions. The substitute maintains identical electrical performance and mounting methodology (through-hole configuration).

The substitute part is in active production status, ensuring procurement availability and long-term supply chain stability compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can VDRS07H460BSE replace ROV07-751K-S in all applications?

A: Electrical substitution is valid based on matched varistor voltage, surge current, and voltage ratings. Mechanical fit must be confirmed due to package diameter difference (9mm versus 7mm). Temperature range must be evaluated if operation above 85°C is required.

Q: What is the significance of the higher energy rating (63J versus 45J) in the substitute?

A: The substitute part absorbs more transient energy, providing enhanced protection margin. This does not create incompatibility; it represents improved performance within the same voltage and current specifications.

Q: Are there compliance differences between the original and substitute parts?

A: Both parts are RoHS3 compliant and REACH unaffected. No regulatory compliance barriers exist for substitution.

Q: How does the 9mm package differ from the 7mm package mechanically?

A: The disc diameter increases by 2mm. PCB through-hole spacing and component placement must accommodate this larger footprint. Electrical performance remains identical.

Q: Is the narrower operating temperature range of the substitute a limitation?

A: The substitute operates from -40 to 85°C. If your application requires operation above 85°C, the original part or an alternative with extended temperature rating must be used. Standard industrial applications typically operate within this range.

Q: Why is the original part obsolete?

A: Littelfuse Inc. has discontinued the ROV07-751K-S. The VDRS07H460BSE provides equivalent electrical performance with active production status, ensuring long-term availability.