ROV07-331K Equivalent & Substitute Parts

Part Overview

The ROV07-331K is a 330V 1.2kA 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 design support and procurement. The part operates across a temperature range of -40°C to 125°C and is housed in a 7mm disc package format.

Substiute Parts

ROV07-331K

Littelfuse Inc.In Stock: 813ROV07-331K Datasheet

Current PartRFQ

ERZ-V07D331

Panasonic Electronic ComponentsIn Stock: 2850ERZ-V07D331 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV07-331K is determined by the following critical electrical and mechanical parameters:

• Varistor voltage rating (nominal 330V) within the specified tolerance band (297V minimum to 363V maximum)
• Surge current capability (minimum 1.2 kA required)
• Maximum AC and DC voltage ratings compatible with circuit requirements
• Through-hole mounting configuration
• Single-circuit topology
• Operating temperature range compatibility
• RoHS3 compliance and REACH unaffected status

The ERZ-V07D331 meets these substitution criteria with equivalent voltage ratings and enhanced surge current capability.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V07D331 is an active substitute for the obsolete ROV07-331K. Both components maintain identical varistor voltage ratings across the full tolerance band and share equivalent maximum AC voltage specifications. The Panasonic ERZ-V07D331 provides enhanced surge current capability (1.75 kA versus 1.2 kA) and increased energy handling (28J versus 23J), offering improved transient protection margins.

Both parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The ERZ-V07D331 operates within a reduced temperature range (-40°C to 85°C) compared to the original part (-40°C to 125°C); applications requiring operation above 85°C must evaluate thermal requirements independently. The package footprint increases from 7mm to 8.5mm disc diameter, requiring PCB layout verification for mechanical fit.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V07D331 directly replace the ROV07-331K in existing designs?

A: Electrical substitution is valid based on matching varistor voltage ratings and surge current capability. Physical substitution requires PCB layout verification due to the increase in disc diameter from 7mm to 8.5mm.

Q: What is the significance of the higher surge current rating on the ERZ-V07D331?

A: The ERZ-V07D331 handles 1.75 kA surge current compared to 1.2 kA on the ROV07-331K. This provides additional transient protection margin and does not create incompatibility with circuits designed for the lower rating.

Q: Are there temperature range limitations with the ERZ-V07D331?

A: The ERZ-V07D331 operates to 85°C maximum ambient temperature, compared to 125°C for the ROV07-331K. Applications requiring sustained operation above 85°C must evaluate thermal performance independently.

Q: Do both parts meet current compliance standards?

A: Both the ROV07-331K and ERZ-V07D331 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What is the impact of the capacitance difference between these parts?

A: The ERZ-V07D331 exhibits 130 pF capacitance at 1 kHz compared to 141 pF on the ROV07-331K. This 11 pF difference is negligible for most transient voltage suppression applications and does not affect substitution validity.