V751CA32 Equivalent & Substitute Parts

Part Overview

The V751CA32 is a 1.2 kV, 25 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in a surface mount disc configuration (32mm). This component is designed for transient overvoltage protection in electronic circuits. The V751CA32 is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

V751CA32

Littelfuse Inc.In Stock: 812V751CA32 Datasheet

Current PartRFQ

V751HA32

Littelfuse Inc.In Stock: 1033V751HA32 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V751CA32 is determined by electrical and mechanical parameter equivalence within the Littelfuse CA and HA series varistors. The following parameters establish substitution validity:

• Varistor voltage rating (1.2 kV nominal, 1.08 – 1.32 kV range)
• Surge current capacity (25 kA)
• Energy absorption (700 J)
• Disc diameter (32mm)
• Operating temperature range (-55°C to +85°C)
• Capacitance characteristics (800 pF @ 1 MHz)
• AC/DC voltage ratings (750 V AC, 970 V DC)
• RoHS3 compliance and MSL rating

The primary difference between the V751CA32 and its substitute is the mounting configuration: surface mount versus bolt mount with formed tabs.

Parameter Comparison

Engineering Selection Recommendations

The V751HA32 is the manufacturer-recommended substitute for the obsolete V751CA32. Both components share identical electrical specifications across all critical parameters: varistor voltage rating, surge current capacity, energy absorption, capacitance, and temperature operating range.

The V751HA32 is currently in active production status, ensuring long-term availability and supply chain continuity. Both parts maintain ROHS3 compliance and MSL rating 1, meeting environmental and reliability standards.

The primary design consideration is the mounting interface: the V751CA32 uses surface mount configuration, while the V751HA32 employs bolt mount with formed tabs. Circuit board layout and mechanical assembly requirements must accommodate this mounting difference. The electrical performance and protective characteristics remain functionally equivalent.

Frequently Asked Questions (FAQ)

Q: Can the V751HA32 directly replace the V751CA32 in existing designs?

A: Electrical substitution is valid. The V751HA32 provides identical varistor voltage, surge current, energy absorption, and temperature performance. However, the mounting interface differs: V751CA32 is surface mount, while V751HA32 is bolt mount with formed tabs. Circuit board layout and mechanical assembly must be adapted accordingly.

Q: What determines substitution validity between these varistors?

A: Substitution is based on matching varistor voltage rating (1.2 kV nominal), surge current capacity (25 kA), energy rating (700 J), disc diameter (32mm), operating temperature range (-55°C to +85°C), and capacitance characteristics (800 pF @ 1 MHz). Both parts meet these criteria.

Q: Why is the V751CA32 listed as obsolete?

A: The V751CA32 has been discontinued by Littelfuse Inc. The V751HA32 represents the active production equivalent within the manufacturer's current product portfolio.

Q: Are there compliance differences between these parts?

A: Both the V751CA32 and V751HA32 are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity level). No compliance differentiation exists between the two parts.

Q: What is the primary design change between these varistors?

A: The mounting configuration differs. The V751CA32 uses surface mount technology, while the V751HA32 uses bolt mount with formed tabs. All electrical and thermal characteristics remain identical.