V460LA40CP Equivalent & Substitute Parts

Part Overview

The V460LA40CP is a 715 V, 10 kA disc varistor manufactured by Littelfuse Inc. in the C-III series. This transient voltage suppressor is designed for through-hole mounting applications requiring high surge current handling and energy absorption. The part is currently active in production with full inventory availability. Equivalent parts are identified when circuit protection requirements can be met within the specified electrical and mechanical parameters of the application.

Substiute Parts

V460LA40CP

Littelfuse Inc.In Stock: 1052V460LA40CP Datasheet

Current PartRFQ

ERZ-V20D751

Panasonic Electronic ComponentsIn Stock: 1872ERZ-V20D751 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V460LA40CP is determined by the following critical parameters:

• Varistor Voltage Range: The nominal varistor voltage must fall within the application tolerance window. The V460LA40CP operates at 715 V typical, with a range of 644.6 V to 786.5 V.
• Surge Current Rating: The substitute must handle the required transient current without degradation. The V460LA40CP is rated for 10 kA surge current.
• Energy Absorption: The substitute must dissipate transient energy within acceptable limits. The V460LA40CP absorbs 430 J.
• Mounting Configuration: Both parts must use through-hole mounting with identical disc 20mm package geometry.
• Maximum AC Voltage: The substitute must support the same 460 V AC operating condition.
• Compliance & Temperature Range: Both parts must meet ROHS3 compliance and operate within the specified temperature window.

The ERZ-V20D751 (Panasonic Electronic Components, ZNR® series) meets these substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the V460LA40CP and ERZ-V20D751 are active production parts with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The varistor voltage specifications overlap within acceptable tolerance ranges for 460 V AC applications. The ERZ-V20D751 exhibits a slightly higher typical varistor voltage (750 V vs. 715 V) and lower surge current rating (7.5 kA vs. 10 kA), with comparable energy absorption (420 J vs. 430 J). Both parts maintain identical through-hole disc 20mm package geometry and single-circuit configuration. Selection between these parts depends on specific application surge current requirements and varistor voltage tolerance windows.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V20D751 directly replace the V460LA40CP in all applications?

A: Direct substitution is valid when the application surge current requirement does not exceed 7.5 kA and the varistor voltage tolerance window accommodates the 750 V typical specification of the ERZ-V20D751. The varistor voltage ranges overlap (644.6 V to 825 V combined), supporting most 460 V AC circuit protection designs.

Q: What is the significance of the varistor voltage difference between these parts?

A: The V460LA40CP operates at 715 V typical with a range of 644.6 V to 786.5 V. The ERZ-V20D751 operates at 750 V typical with a range of 675 V to 825 V. The 35 V difference in typical voltage affects the clamping voltage during transient events. Applications with strict voltage regulation requirements must verify compatibility within their specific tolerance window.

Q: Why does the ERZ-V20D751 have a lower surge current rating?

A: The ERZ-V20D751 is rated for 7.5 kA surge current compared to the V460LA40CP's 10 kA rating. This difference reflects the design characteristics of each varistor series. Applications requiring 10 kA surge handling must use the V460LA40CP or confirm that the actual transient current in the circuit does not exceed 7.5 kA.

Q: Are the package dimensions identical between these parts?

A: Both parts use through-hole mounting with a disc 20mm package configuration, ensuring mechanical compatibility in PCB layouts designed for either component.

Q: Do both parts meet current compliance standards?

A: Yes. Both the V460LA40CP and ERZ-V20D751 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.