V481HC40 Equivalent & Substitute Parts

Part Overview

The V481HC40 is a 750 V, 40 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a bolt-mount disc configuration with 40mm diameter and formed tabs. This component is designed for transient voltage protection in industrial and power distribution applications. The part is Active status and ROHS3 compliant, making it suitable for current procurement and deployment in new designs.

Substitute parts are identified when they maintain identical electrical performance characteristics and mechanical compatibility, allowing seamless integration into existing circuit designs without functional compromise.

Substiute Parts

V481HC40

Littelfuse Inc.In Stock: 1043V481HC40 Datasheet

Current PartRFQ

V481HA40

Littelfuse Inc.In Stock: 1311V481HA40 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the V481HC40 is determined by strict equivalence across the following critical parameters:

• Varistor voltage range (Min/Typ/Max): 675 V / 750 V / 825 V
• Surge current rating: 40 kA
• Energy absorption capacity: 650 J
• Mounting configuration: Bolt Mount
• Physical package: Disc 40mm with formed tabs
• Electrical operating limits: 480 V AC / 640 V DC maximum
• Thermal operating range: -55°C to 85°C
• Capacitance specification: 2700 pF @ 1 MHz
• Circuit count: Single circuit (1)

The V481HA40 meets all these criteria and is classified as a parametric equivalent. The primary distinction between the HC and HA series designations reflects internal manufacturing or design revision differences that do not affect electrical or mechanical performance in this application.

Parameter Comparison

Engineering Selection Recommendations

Both the V481HC40 and V481HA40 are Active status components manufactured by Littelfuse Inc. and carry identical ROHS3 compliance and REACH unaffected certifications. Selection between these parts should be based on inventory availability and lead time considerations, as they are electrically and mechanically interchangeable.

The V481HC40 currently maintains 956 units in stock, while the V481HA40 has 1240 units available. For applications requiring immediate procurement, the V481HA40 offers superior inventory position. Both parts satisfy industrial transient voltage suppression requirements across the specified voltage and current ratings.

Frequently Asked Questions (FAQ)

Q: Can the V481HA40 be used as a direct replacement for the V481HC40?

A: Yes. The V481HA40 is a parametric equivalent with identical electrical ratings (750 V typical varistor voltage, 40 kA surge current, 650 J energy), mechanical configuration (bolt mount, 40mm disc), and operating specifications. No circuit redesign or validation is required.

Q: What is the difference between the HC and HA series designations?

A: The series designation reflects internal manufacturing or design revision classification by Littelfuse Inc. and does not affect electrical performance or mechanical compatibility in this product category.

Q: Are the physical dimensions and mounting interfaces identical?

A: Yes. Both parts use identical bolt-mount disc configuration with 40mm diameter and formed tabs, ensuring mechanical interchangeability in existing mounting structures.

Q: Do both parts meet the same compliance standards?

A: Yes. Both the V481HC40 and V481HA40 are ROHS3 compliant, REACH unaffected, and carry MSL rating 1 (unlimited moisture sensitivity level).

Q: What is the operating temperature range for both parts?

A: Both parts operate across -55°C to 85°C ambient temperature range, suitable for industrial and outdoor applications.

Q: Can these parts be used interchangeably in new designs?

A: Yes. Either part number can be specified for new designs without functional or performance compromise, provided the application requirements align with the stated electrical and thermal specifications.