V481CA32 Equivalent & Substitute Parts

Part Overview

The V481CA32 is a 750 V, 25 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a surface mount disc configuration (32mm). This component is designed for transient voltage protection in industrial and commercial applications. The V481CA32 is classified as obsolete, making identification of suitable substitute parts essential for ongoing system maintenance and new design implementations.

Substiute Parts

V481CA32

Littelfuse Inc.In Stock: 925V481CA32 Datasheet

Current PartRFQ

V481HA32

Littelfuse Inc.In Stock: 671V481HA32 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The V481HA32 qualifies as a direct substitute for the V481CA32 based on the following critical electrical and mechanical parameters:

• Voltage Rating: Both parts maintain identical maximum AC (480 V) and DC (640 V) specifications, with matching varistor voltage range (675 V minimum to 825 V maximum, 750 V typical)
• Surge Current Capacity: Both rated for 25 kA surge current
• Energy Absorption: Both rated for 450 J energy dissipation
• Circuit Configuration: Both are single-circuit (1 circuit) devices
• Package Geometry: Both use Disc 32mm form factor
• Compliance: Both are ROHS3 compliant

The primary difference is the mounting method: V481CA32 uses surface mount, while V481HA32 uses bolt mount with formed tabs. This distinction affects installation methodology but does not alter electrical performance or protection characteristics.

Parameter Comparison

Engineering Selection Recommendations

The V481HA32 is the appropriate substitute for the V481CA32 in applications requiring equivalent electrical protection. The V481HA32 maintains all critical electrical specifications while offering the advantage of active product status, ensuring continued availability and manufacturing support from Littelfuse Inc.

Selection between these parts depends on the mechanical integration requirements of the application. The V481CA32 surface mount configuration is suitable for PCB-level integration, while the V481HA32 bolt mount design accommodates direct connection to bus bars or terminal blocks in higher-current distribution systems. Both parts satisfy ROHS3 compliance requirements and provide identical transient voltage suppression performance.

Frequently Asked Questions (FAQ)

Q: Can the V481HA32 replace the V481CA32 in existing designs?

A: Yes, provided the mechanical mounting interface can accommodate the bolt mount configuration with formed tabs. The electrical performance and protection characteristics are identical.

Q: What is the primary difference between these two parts?

A: The mounting method differs. The V481CA32 is surface mount (suitable for PCB assembly), while the V481HA32 is bolt mount (suitable for direct connection to power distribution infrastructure). Electrical specifications are identical.

Q: Why is the V481CA32 listed as obsolete?

A: The V481CA32 has been discontinued by Littelfuse Inc. The V481HA32 remains in active production and is the recommended alternative for new designs and replacements.

Q: Are both parts RoHS compliant?

A: Yes, both the V481CA32 and V481HA32 are ROHS3 compliant.

Q: What is the surge current rating for these varistors?

A: Both parts are rated for 25 kA surge current with 450 J energy absorption capacity.

Q: Do these parts have different operating temperature ranges?

A: The V481HA32 specifies an operating temperature range of -55°C to 85°C. Operating temperature specifications for the V481CA32 were not provided in the available data.