ROV07H331K Equivalent & Substitute Parts

Part Overview

The ROV07H331K is a 330V 1.75kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component features a 7mm disc package and is rated for operating temperatures from -40°C to 125°C. The product is currently obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations where equivalent performance is required.

Substiute Parts

ROV07H331K

Littelfuse Inc.In Stock: 834ROV07H331K Datasheet

Current PartRFQ

ERZ-V07D331

Panasonic Electronic ComponentsIn Stock: 2850ERZ-V07D331 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV07H331K is determined by the following critical parameters:

• Varistor voltage rating (minimum, typical, and maximum values must fall within 297V to 363V range)
• Surge current capacity (1.75 kA minimum)
• Energy absorption capability (28 J minimum)
• Maximum AC and DC voltage ratings
• Through-hole mounting configuration
• Single-circuit design
• RoHS3 compliance status

The ERZ-V07D331 from Panasonic Electronic Components meets these substitution criteria. While the package diameter increases from 7mm to 8.5mm, both components maintain identical electrical performance specifications and mounting methodology, allowing functional equivalence in circuit applications where physical space permits the larger disc diameter.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V07D331 is the qualified substitute for the obsolete ROV07H331K based on the following factors:

• Both components maintain identical varistor voltage specifications across the full rated range (297V to 363V)
• Surge current capacity and energy absorption ratings are equivalent at 1.75 kA and 28 J respectively
• Both components are ROHS3 compliant and carry identical regulatory certifications (EAR99, REACH Unaffected)
• The ERZ-V07D331 is currently in active production status with established supply chain availability
• Maximum DC voltage specification of the substitute (270 V) remains within acceptable tolerance relative to the original part (275 V)

The primary design consideration is the package diameter increase from 7mm to 8.5mm. Physical board layout verification is necessary to confirm accommodation of the larger disc diameter in existing through-hole mounting positions.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V07D331 be used as a direct replacement for the ROV07H331K?

A: The ERZ-V07D331 provides electrical equivalence for the ROV07H331K. Physical compatibility depends on PCB layout clearance, as the disc diameter increases from 7mm to 8.5mm. Verify that the mounting hole spacing and surrounding component placement accommodate the larger package size.

Q: What is the difference in maximum DC voltage between the two parts?

A: The ROV07H331K is rated for 275V maximum DC, while the ERZ-V07D331 is rated for 270V maximum DC. This 5V difference remains within typical circuit design margins for 330V nominal varistor applications.

Q: Are there temperature rating differences between these components?

A: The ROV07H331K operates from -40°C to 125°C, while the ERZ-V07D331 operates from -40°C to 85°C. Applications requiring operation above 85°C ambient temperature should retain the original Littelfuse component or identify alternative solutions.

Q: What is the significance of the capacitance difference?

A: The ROV07H331K has 140 pF capacitance at 1 kHz, while the ERZ-V07D331 has 130 pF. This 10 pF difference is negligible for most transient voltage suppression applications and does not affect functional equivalence.

Q: Why is the original part obsolete?

A: The ROV07H331K has been discontinued by Littelfuse Inc. The ERZ-V07D331 from Panasonic represents the current-generation equivalent with active manufacturing and supply chain support.