ROV20H680L-S Equivalent & Substitute Parts

Part Overview

The ROV20H680L-S is a 68V 3kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The varistor provides single-circuit protection with a 20mm disc form factor and operates across a temperature range of -40°C to 125°C.

Substiute Parts

ROV20H680L-S

Littelfuse Inc.In Stock: 715ROV20H680L-S Datasheet

Current PartRFQ

ERZ-V20D680

Panasonic Electronic ComponentsIn Stock: 2159ERZ-V20D680 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV20H680L-S is determined by the following critical parameters:

• Varistor voltage rating (68V nominal)
• Surge current capacity (3 kA)
• Maximum AC and DC voltage ratings (40V AC / 56V DC)
• Energy absorption capability (49J)
• Single-circuit configuration
• Through-hole mounting compatibility
• RoHS3 compliance and REACH unaffected status

The ERZ-V20D680 meets these substitution criteria with equivalent electrical performance and regulatory compliance. Physical package dimensions differ slightly (21.5mm vs. 20mm disc), which must be evaluated for mechanical fit within the target application.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V20D680 is an active substitute for the obsolete ROV20H680L-S based on electrical equivalence and regulatory compliance. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

The primary consideration for component selection is the operating temperature range. The ROV20H680L-S supports operation to 125°C, while the ERZ-V20D680 is rated to 85°C. Applications requiring sustained operation above 85°C must evaluate thermal performance requirements against the substitute's maximum rating.

The physical package dimension difference (21.5mm vs. 20mm disc) requires mechanical verification within the PCB layout and enclosure constraints. The increased capacitance of the ERZ-V20D680 (11500 pF vs. 9600 pF at 1 kHz) may affect high-frequency circuit behavior and should be assessed for signal integrity in sensitive applications.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V20D680 directly replace the ROV20H680L-S in all applications?

A: Electrical substitution is valid for applications operating within the ERZ-V20D680's maximum temperature rating of 85°C. Mechanical fit must be verified due to the 1.5mm increase in disc diameter. The higher capacitance value may require evaluation in circuits sensitive to parasitic capacitance effects.

Q: What is the significance of the varistor voltage tolerance range difference?

A: The ROV20H680L-S has a tolerance range of 57.8V to 78.2V, while the ERZ-V20D680 ranges from 61V to 75V. Both maintain the 68V nominal rating. The narrower tolerance of the Panasonic part may provide tighter voltage regulation in applications requiring precise clamping characteristics.

Q: Are there any compliance or certification differences between these parts?

A: Both components are ROHS3 compliant and REACH unaffected. No compliance barriers exist for substitution from a regulatory standpoint.

Q: How does the capacitance difference affect circuit performance?

A: The ERZ-V20D680 exhibits 1900 pF higher capacitance at 1 kHz. In high-frequency applications or circuits with stringent impedance requirements, this difference may introduce measurable effects on signal propagation and filtering characteristics.

Q: Is the 1.5mm package size increase critical for PCB layout?

A: Package dimension compatibility depends on available board space and hole spacing. Verify that the 21.5mm disc diameter accommodates existing through-hole pad patterns and clearance requirements before implementation.