ROV07H511K Equivalent & Substitute Parts

Part Overview

The ROV07H511K 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 equivalent substitutes necessary for ongoing production and maintenance requirements. 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

Littelfuse Inc.In Stock: 776ROV07H511K Datasheet

Current PartRFQ

ERZ-V07D511

Panasonic Electronic ComponentsIn Stock: 28040ERZ-V07D511 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV07H511K is determined by electrical and mechanical compatibility across the following critical parameters:

• Varistor voltage rating (minimum, typical, and maximum values must fall within 459 V to 561 V range)
• Surge current capacity (1.75 kA minimum)
• Energy absorption (45 J minimum)
• Maximum DC and AC voltage ratings
• Through-hole mounting configuration
• Single-circuit design
• Operating temperature range compatibility
• RoHS3 compliance status

The ERZ-V07D511 from Panasonic Electronic Components meets these substitution criteria as an active, in-stock alternative with equivalent electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V07D511 is the qualified substitute for the obsolete ROV07H511K. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment. The substitute part is currently in active production with substantial inventory availability (27,951 pcs), eliminating supply chain risk associated with the obsolete original part.

The primary design consideration is the package case dimension difference: the substitute uses a Disc 8.5mm package versus the original Disc 7mm. This dimensional change requires PCB layout verification to confirm mechanical fit within the intended application. All electrical parameters remain equivalent or compatible, with the substitute's maximum DC voltage rating of 410 V remaining within acceptable operating margins relative to the original 418 V specification.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V07D511 be used as a direct replacement for the ROV07H511K?

A: The ERZ-V07D511 is electrically equivalent across all critical parameters. However, the package case dimension increases from 7mm to 8.5mm, requiring verification that the larger footprint accommodates the PCB layout and mechanical constraints of the application.

Q: What is the significance of the maximum DC voltage difference (418 V vs. 410 V)?

A: Both ratings provide adequate margin for the 510 V nominal varistor voltage specification. The 8 V difference does not affect functional compatibility in standard transient suppression applications operating within the specified voltage range.

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

A: Both parts maintain identical RoHS3 compliance, REACH unaffected status, and EAR99 ECCN classification. No compliance barriers exist for substitution.

Q: Why is the operating temperature range different (125°C vs. 85°C)?

A: The original part supports a wider temperature range (-40°C to 125°C) compared to the substitute (-40°C to 85°C). Applications requiring operation above 85°C must retain the original part or identify alternative solutions.

Q: What is the capacitance difference between the parts?

A: The original part specifies 100 pF @ 1 kHz, while the substitute specifies 90 pF @ 1 MHz. These measurements are taken at different frequencies and represent minor variations typical of component manufacturing tolerances. Both values are suitable for transient suppression applications.