ROV20H331K Equivalent & Substitute Parts

Part Overview

The ROV20H331K is a 330V 10kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The substitute part maintains electrical performance specifications while offering current product availability.

Substiute Parts

ROV20H331K

Littelfuse Inc.In Stock: 1204ROV20H331K Datasheet

Current PartRFQ

ERZ-V20D331

Panasonic Electronic ComponentsIn Stock: 1911ERZ-V20D331 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The ERZ-V20D331 from Panasonic Electronic Components qualifies as a direct substitute based on the following electrical and mechanical parameters:

• Varistor voltage rating: 330 V (typical) — identical specification
• Surge current capacity: 10 kA — identical specification
• Energy absorption: 228 J — identical specification
• Number of circuits: 1 — identical specification
• Mounting configuration: Through hole — identical specification
• Maximum AC/DC voltage ratings: 210 V AC / 270 V DC — within acceptable tolerance
• Varistor voltage range: 297 V (min) to 363 V (max) — identical specification
• RoHS3 compliance: Confirmed — regulatory equivalence
• REACH status: Unaffected — regulatory equivalence

Physical package dimensions differ slightly (20mm vs. 21.5mm disc diameter), requiring verification of PCB layout compatibility. The substitute part is classified as active product status, ensuring long-term availability.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V20D331 is the qualified substitute for ROV20H331K based on electrical parameter equivalence and regulatory compliance. Both components meet ROHS3 and REACH requirements, ensuring regulatory alignment for new designs and legacy system updates.

The maximum DC voltage specification differs by 5 V (275 V vs. 270 V), which remains within the varistor voltage tolerance band and does not affect functional substitution in standard transient suppression circuits.

The operating temperature maximum differs by 40°C (125°C vs. 85°C). Applications requiring operation above 85°C ambient temperature must retain the original ROV20H331K or identify alternative solutions.

The physical package diameter increases from 20mm to 21.5mm. PCB layout verification is required to confirm clearance and mounting compatibility before implementation.

Frequently Asked Questions (FAQ)

Q: Can ERZ-V20D331 replace ROV20H331K in all applications?

A: Electrical substitution is valid for standard transient voltage suppression circuits. Physical package dimensions differ (20mm vs. 21.5mm disc), requiring PCB layout confirmation. Applications operating above 85°C ambient temperature require the original part or alternative selection.

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

A: The 5 V difference (275 V vs. 270 V) falls within the varistor voltage tolerance specification (297 V to 363 V) and does not affect functional performance in transient suppression applications.

Q: Are both parts RoHS and REACH compliant?

A: Both ROV20H331K and ERZ-V20D331 are ROHS3 compliant and REACH unaffected, confirming regulatory equivalence for procurement and design purposes.

Q: Why is product status relevant for substitution?

A: The ROV20H331K is obsolete, limiting future availability. The ERZ-V20D331 is active product, ensuring long-term supply chain continuity and manufacturing support.

Q: What is the capacitance difference between the two parts?

A: Capacitance differs by 10 pF (1110 pF vs. 1100 pF) at 1 kHz. This 0.9% variation is negligible for transient suppression applications and does not affect circuit performance.