ROV05-151K Equivalent & Substitute Parts

Part Overview

The ROV05-151K is a 150V 400A varistor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This component features a through-hole disc package (5mm) with a nominal varistor voltage of 150V and surge current rating of 400A. The product is currently obsolete, making identification of compatible substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

ROV05-151K

Littelfuse Inc.In Stock: 683ROV05-151K Datasheet

Current PartRFQ

ERZ-V05D151

Panasonic Electronic ComponentsIn Stock: 3156ERZ-V05D151 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ROV05-151K is determined by the following critical parameters:

• Varistor Voltage (Typ): Must remain 150V to maintain circuit protection thresholds
• Varistor Voltage Range: Must fall within 135V – 165V tolerance band
• Maximum AC/DC Volts: Must support 95V AC and 125V DC operating conditions
• Operating Temperature Range: Must cover -40°C to 85°C
• Mounting Type: Must be through-hole compatible
• Number of Circuits: Must be single-circuit configuration
• RoHS Compliance: Must maintain ROHS3 compliance status

The ERZ-V05D151 qualifies as a substitute based on matching all critical electrical parameters and compliance requirements. While this substitute exhibits higher surge current capability (800A vs 400A) and greater energy absorption (6.5J vs 5.5J), these represent performance enhancements rather than incompatibilities. The package form factor differs (7mm disc vs 5mm disc), requiring mechanical verification during integration.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-V05D151 (Panasonic ZNR® series) is the qualified substitute for the obsolete ROV05-151K. Both components maintain identical varistor voltage specifications (150V nominal, 135V–165V range) and operating temperature ratings (-40°C to 85°C). Both achieve ROHS3 compliance and support the required AC/DC voltage limits.

The ERZ-V05D151 is currently in active production status, ensuring supply chain availability. The substitute provides enhanced surge current handling (800A vs 400A) and greater energy absorption capacity (6.5J vs 5.5J), offering improved transient protection margins without compromising circuit compatibility.

Physical package dimensions require verification: the substitute uses a 7mm disc form factor compared to the original 5mm disc. PCB layout and mounting hole spacing must be confirmed for mechanical fit before implementation.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V05D151 directly replace the ROV05-151K in existing designs?

A: Electrical compatibility is confirmed across all critical parameters: varistor voltage, operating temperature range, and compliance certifications match exactly. Mechanical compatibility requires verification of the package size difference (7mm vs 5mm disc diameter) and PCB mounting hole spacing.

Q: Why does the ERZ-V05D151 have higher surge current and energy ratings?

A: The substitute component is rated for 800A surge current and 6.5J energy absorption compared to the original 400A and 5.5J. These represent enhanced performance specifications that do not create incompatibility; the substitute provides greater transient protection capability within the same voltage and temperature operating envelope.

Q: Are both components RoHS compliant?

A: Yes. Both the ROV05-151K and ERZ-V05D151 are ROHS3 compliant, meeting current environmental and regulatory requirements.

Q: What is the key difference between these varistors?

A: The primary difference is product status: the ROV05-151K is obsolete, while the ERZ-V05D151 is in active production. Electrical performance parameters are equivalent. The package form factor differs (5mm vs 7mm disc), requiring mechanical assessment during board redesign or component sourcing.

Q: Can I use the ERZ-V05D151 in new designs?

A: Yes. The ERZ-V05D151 meets all electrical requirements for 150V transient voltage suppression applications and is actively manufactured, making it suitable for new product development and long-term supply chain stability.