ROV10H331K-S Equivalent & Substitute Parts

Part Overview

The ROV10H331K-S is a 330V 4.6kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component features a 10mm disc package and is rated for 58J energy dissipation with operating temperatures from -40°C to 85°C. The part is currently obsolete, making identification of functionally equivalent alternatives essential for ongoing system maintenance and new design implementations.

Substiute Parts

ROV10H331K-S

Littelfuse Inc.In Stock: 734ROV10H331K-S Datasheet

Current PartRFQ

ERZ-V10D331

Panasonic Electronic ComponentsIn Stock: 2900ERZ-V10D331 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ROV10H331K-S is determined by the following critical parameters:

• Varistor voltage rating (297V minimum to 363V maximum range)
• Surge current capacity (4.6 kA minimum)
• Energy dissipation capability (58J minimum)
• Maximum AC and DC voltage ratings
• Through-hole mounting configuration
• Operating temperature range (-40°C to 85°C)
• RoHS3 compliance and regulatory status

The ERZ-V10D331 meets all substitution criteria within these allowed parameters. Minor variations in physical package dimensions (11.5mm versus 10mm disc) and capacitance specifications (300pF versus 280pF @ 1kHz) remain within acceptable tolerance for equivalent functionality.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V10D331 from Panasonic Electronic Components is the qualified substitute for the obsolete ROV10H331K-S. Both components maintain identical electrical performance across all critical parameters: varistor voltage range, surge current capacity, and energy dissipation. Both are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The ERZ-V10D331 carries active product status, ensuring ongoing availability and supply chain continuity. The maximum DC voltage specification of the substitute (270V) is marginally lower than the original (275V), remaining within acceptable operating margins for 330V nominal varistor applications. The physical package dimension increase from 10mm to 11.5mm disc requires PCB layout verification to confirm mechanical fit within existing mounting footprints.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V10D331 directly replace the ROV10H331K-S in existing designs?

A: Electrical substitution is valid based on matching varistor voltage, surge current, and energy ratings. Physical PCB layout must accommodate the 11.5mm disc package versus the original 10mm configuration.

Q: What is the significance of the 5V difference in maximum DC voltage ratings?

A: The ROV10H331K-S specifies 275V maximum DC while the ERZ-V10D331 specifies 270V maximum DC. Both operate within the 330V nominal varistor voltage range and are suitable for equivalent circuit protection applications.

Q: Are there compliance differences between the two parts?

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

Q: Does the capacitance difference (280pF versus 300pF) affect circuit performance?

A: The 20pF capacitance variation is within typical tolerance for varistor applications and does not alter fundamental transient voltage suppression characteristics.

Q: Why is the original part obsolete?

A: The ROV10H331K-S has reached end-of-life status. The ERZ-V10D331 provides equivalent electrical performance with active manufacturing status.