ROV05-331K Equivalent & Substitute Parts

Part Overview

The ROV05-331K is a 330V 400A disc varistor manufactured by Littelfuse, designed for transient voltage suppression in through-hole applications. This part is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance requirements. The varistor provides single-circuit protection with a 5mm disc form factor and operates across a temperature range of -40°C to 85°C.

Substiute Parts

ROV05-331K

LittelfuseIn Stock: 696ROV05-331K Datasheet

Current PartRFQ

ERZ-V05D331

Panasonic Electronic ComponentsIn Stock: 1224ERZ-V05D331 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ROV05-331K is determined by the following critical parameters:

• Varistor voltage rating (minimum 297V, typical 330V, maximum 363V)
• Maximum AC and DC voltage specifications (210V AC, 270V DC minimum)
• Operating temperature range (-40°C to 85°C)
• Single-circuit configuration
• Through-hole mounting capability
• RoHS3 compliance and REACH unaffected status

The ERZ-V05D331 qualifies as a direct substitute based on matching varistor voltage specifications, temperature range, circuit count, and compliance certifications. While the substitute exhibits higher surge current capacity (800A versus 400A) and increased energy rating (13J versus 11.5J), these represent performance enhancements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V05D331 is suitable for direct substitution of the obsolete ROV05-331K based on electrical parameter equivalence and regulatory compliance alignment. Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory continuity in applications requiring these certifications.

The substitute part carries active product status, providing supply chain stability and availability advantages over the obsolete original. The enhanced surge current capacity and energy rating of the ERZ-V05D331 do not create incompatibility; these characteristics provide additional margin in transient suppression performance.

Physical form factor differences exist: the substitute uses a 7mm disc package compared to the original 5mm disc. PCB layout verification is required to confirm mechanical fit within existing through-hole mounting positions.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V05D331 replace the ROV05-331K in existing designs?

A: Yes, provided PCB through-hole spacing accommodates the 7mm disc package. Electrical parameters, voltage ratings, temperature range, and compliance certifications are equivalent.

Q: What is the significance of the higher surge current rating in the substitute?

A: The ERZ-V05D331 provides 800A surge capacity versus 400A in the original. This represents enhanced transient suppression capability and does not create incompatibility with circuits designed for the lower rating.

Q: Are there compliance or regulatory differences between these parts?

A: No. Both components are ROHS3 compliant and REACH unaffected, maintaining identical regulatory status.

Q: Why does the substitute have a larger package size?

A: The ERZ-V05D331 uses a 7mm disc form factor compared to the 5mm original. Physical fit must be verified against PCB layout constraints before implementation.

Q: Is the substitute part currently available?

A: Yes. The ERZ-V05D331 carries active product status with documented inventory availability, unlike the obsolete ROV05-331K.