ROV07H180M-S Equivalent & Substitute Parts

Part Overview

The ROV07H180M-S is a 18V 500A varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component features a disc form factor (7mm) and is rated for 1.5J energy dissipation with an operating temperature range of -40°C to 125°C. The part is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Substiute Parts

ROV07H180M-S

Littelfuse Inc.In Stock: 1102ROV07H180M-S Datasheet

Current PartRFQ

ERZ-V07D180

Panasonic Electronic ComponentsIn Stock: 5008ERZ-V07D180 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ROV07H180M-S is determined by the following critical parameters:

• Varistor voltage rating (18V nominal operation)
• Surge current capacity (500A minimum)
• Maximum AC and DC voltage ratings (11V AC / 14V DC)
• Through-hole mounting configuration
• Single-circuit design
• RoHS3 compliance and REACH unaffected status

The ERZ-V07D180 from Panasonic Electronic Components meets these core electrical and mechanical requirements. While the package form factor differs slightly (8.5mm disc versus 7mm disc), the electrical performance envelope and mounting methodology remain compatible for equivalent circuit protection.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V07D180 is the designated manufacturer-recommended substitute for the obsolete ROV07H180M-S. Both components maintain identical maximum voltage ratings (11V AC / 14V DC) and surge current capacity (500A), ensuring equivalent circuit protection performance.

Key considerations for selection:

The ERZ-V07D180 carries active product status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements.

The operating temperature range differs: the ROV07H180M-S operates to 125°C, while the ERZ-V07D180 operates to 85°C. Applications requiring operation above 85°C require thermal analysis to confirm the substitute is suitable.

The package form factor increases from 7mm to 8.5mm disc diameter. PCB layout verification is necessary to confirm mechanical fit within existing mounting footprints.

Energy dissipation capacity differs: the ROV07H180M-S is rated at 1.5J versus 1.1J for the ERZ-V07D180. Applications with high transient energy requirements should verify the lower energy rating remains adequate for the intended protection circuit.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V07D180 directly replace the ROV07H180M-S in existing designs?

A: Electrical compatibility is confirmed across all critical parameters: 18V nominal varistor voltage, 500A surge current, and 11V AC / 14V DC maximum ratings. Physical compatibility requires verification of the increased package diameter (8.5mm versus 7mm) against PCB layout constraints and mounting hole spacing.

Q: What are the key differences between these two parts?

A: The primary differences are product status (obsolete versus active), operating temperature range (125°C versus 85°C maximum), energy rating (1.5J versus 1.1J), and package diameter (7mm versus 8.5mm). Varistor voltage ratings and surge current capacity remain equivalent.

Q: Is the lower energy rating of the ERZ-V07D180 a concern?

A: The 0.4J difference in energy dissipation capacity must be evaluated within the specific application's transient event profile. Applications with high-energy transient events should confirm the 1.1J rating provides adequate protection margin.

Q: Does the package size difference affect electrical performance?

A: Package diameter does not affect electrical performance characteristics. The 8.5mm disc maintains the same electrical properties as the 7mm disc. Physical fit within the PCB layout is the primary consideration.

Q: Are both parts compliant with current regulatory standards?

A: Both the ROV07H180M-S and ERZ-V07D180 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.