ROV05-390K-S Equivalent & Substitute Parts

Part Overview

The ROV05-390K-S is a 39V 100A varistor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This component features a through-hole disc 5mm package and is rated for 1.2J energy dissipation. The product is currently obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where equivalent performance is required.

Substiute Parts

ROV05-390K-S

Littelfuse Inc.In Stock: 1124ROV05-390K-S Datasheet

Current PartRFQ

ERZ-V05D390

Panasonic Electronic ComponentsIn Stock: 7227ERZ-V05D390 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV05-390K-S is determined by the following critical parameters:

• Varistor Voltage Rating: The nominal voltage must remain at 39V (acceptable range: 35.1V to 42.9V minimum to maximum)
• Surge Current Capability: Minimum 100A required for equivalent performance
• Energy Dissipation: 1.2J minimum
• Voltage Limits: Maximum AC 25V and Maximum DC 31V
• Operating Temperature: -40°C to 85°C range
• Mounting Configuration: Through-hole disc package
• Circuit Count: Single circuit (1 circuit)
• Compliance: ROHS3 compliant

The ERZ-V05D390 from Panasonic Electronic Components meets all substitution criteria with enhanced surge current capability (250A) and maintains electrical and thermal specifications within acceptable parameters.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V05D390 is a direct functional substitute for the obsolete ROV05-390K-S. Both components maintain identical varistor voltage ratings, voltage limits, energy dissipation, and operating temperature specifications. The substitute part offers enhanced surge current capability (250A versus 100A), which provides additional margin in transient suppression applications without compromising circuit compatibility.

Both parts are ROHS3 compliant and carry equivalent regulatory status (EAR99 ECCN, REACH Unaffected). The ERZ-V05D390 is currently in active production status, ensuring long-term availability for replacement and new designs.

Physical package differences exist: the substitute uses a 7mm disc versus the original 5mm disc. PCB layout verification is required to confirm mechanical fit within existing mounting footprints.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V05D390 directly replace the ROV05-390K-S in existing designs?

A: Electrical substitution is valid. The 39V varistor voltage rating, voltage limits, energy dissipation, and operating temperature range are identical. Physical package size differs (7mm versus 5mm disc), requiring PCB layout verification for mechanical compatibility.

Q: What is the significance of the higher surge current rating (250A vs 100A) in the substitute?

A: The ERZ-V05D390 provides greater transient current handling capacity. This does not create incompatibility; it represents enhanced performance margin for the same application voltage class.

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

A: Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99. No regulatory barriers exist to substitution.

Q: Why is the original ROV05-390K-S obsolete?

A: Product obsolescence is determined by manufacturer lifecycle decisions. The ERZ-V05D390 from Panasonic provides equivalent functionality with active production status.

Q: What should be verified before implementing this substitute in production?

A: Confirm PCB mounting footprint compatibility with the 7mm disc package. Verify that the increased capacitance of the substitute (700 pF versus 56 pF at 1 kHz) does not introduce unintended circuit effects in high-frequency applications.