ROV07H511K-S Equivalent & Substitute Parts

Part Overview

The ROV07H511K-S is a 510 V, 1.75 kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity. The varistor provides protection against voltage transients with a nominal varistor voltage of 510 V and energy absorption capacity of 45 J.

Substiute Parts

ROV07H511K-S

Littelfuse Inc.In Stock: 992ROV07H511K-S Datasheet

Current PartRFQ

ERZ-V07D511

Panasonic Electronic ComponentsIn Stock: 28040ERZ-V07D511 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV07H511K-S is determined by electrical equivalence across the following parameters:

• Varistor voltage range (Min/Typ/Max): 459 V / 510 V / 561 V
• Surge current rating: 1.75 kA
• Energy absorption: 45 J
• Maximum AC and DC voltage ratings
• Single-circuit configuration
• Through-hole mounting capability
• RoHS3 compliance

The ERZ-V07D511 from Panasonic Electronic Components meets these electrical criteria. Physical package dimensions differ (8.5mm vs. 7mm disc), which may require PCB layout verification but does not affect electrical performance in standard through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V07D511 is an active product from Panasonic Electronic Components and serves as the direct electrical equivalent to the obsolete ROV07H511K-S. Both components are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The primary design consideration is the package dimension difference: the ERZ-V07D511 uses an 8.5mm disc versus the 7mm disc of the original part. This requires verification that PCB footprint and mounting hole spacing accommodate the larger package. The maximum DC voltage specification of the Panasonic part is 410 V compared to 418 V for the Littelfuse part, representing a 2% reduction that must be evaluated against circuit operating margins.

The operating temperature range of the ERZ-V07D511 extends to 85°C maximum ambient, compared to 125°C for the original part. Applications requiring operation above 85°C ambient temperature require alternative component selection.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V07D511 directly replace the ROV07H511K-S in existing designs?

A: Electrical substitution is valid when the 8.5mm disc package fits the PCB layout and the 410 V maximum DC rating meets circuit requirements. Physical package verification is mandatory before implementation.

Q: What is the significance of the varistor voltage range (459 V to 561 V)?

A: The varistor voltage range defines the tolerance band around the nominal 510 V specification. Both parts share identical ranges, confirming electrical equivalence for transient suppression performance.

Q: Why does the Panasonic part have a lower maximum DC voltage rating?

A: The 410 V maximum DC rating for the ERZ-V07D511 versus 418 V for the ROV07H511K-S represents a design variation between manufacturers. Circuit operating voltage must remain below the lower specification to ensure safe operation with the substitute part.

Q: Are there temperature limitations when using the ERZ-V07D511?

A: The ERZ-V07D511 is rated for -40°C to 85°C ambient temperature, compared to -40°C to 125°C for the original part. Applications requiring sustained operation above 85°C ambient require alternative component selection.

Q: What packaging considerations apply to this substitution?

A: The ERZ-V07D511 uses an 8.5mm disc package versus the 7mm disc of the ROV07H511K-S. PCB footprint, mounting hole diameter, and lead spacing must be verified for compatibility before design implementation.