V300LA40C Equivalent & Substitute Parts

Part Overview

The V300LA40C is a 470V 10kA varistor manufactured by Littelfuse in the C-III series, designed for transient voltage suppression applications. This component features a through-hole disc package (20mm) with a rated varistor voltage of 470V typical and surge current capability of 10kA. The part is currently classified as obsolete, making identification of suitable substitutes essential for ongoing system support and component procurement.

Substiute Parts

V300LA40C

LittelfuseIn Stock: 790V300LA40C Datasheet

Current PartRFQ

V300LA40CP

Littelfuse Inc.In Stock: 19614V300LA40CP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V300LA40C is determined by strict equivalence across the following critical parameters:

• Varistor Voltage Rating: Nominal 470V with tolerance range 423V - 517V
• Surge Current Capability: 10 kA minimum
• Energy Absorption: 335 J
• Mounting Configuration: Through hole disc package, 20mm form factor
• Electrical Characteristics: Capacitance of 7000 pF @ 1 MHz, maximum AC voltage 300V
• Operating Temperature: -55°C to 85°C range
• Circuit Count: Single circuit configuration

The V300LA40CP qualifies as a direct substitute based on identical electrical specifications and mechanical compatibility. The primary distinction is product status and packaging format.

Parameter Comparison

Engineering Selection Recommendations

The V300LA40CP is the direct equivalent for the obsolete V300LA40C. Both components share identical electrical and mechanical specifications within the C-III series from Littelfuse. The V300LA40CP maintains active product status, ensuring continued availability and supply chain support. Both parts carry ROHS3 compliance and EAR99 export classification, with equivalent regulatory standing. The V300LA40CP is suitable for direct replacement in applications currently using the V300LA40C without circuit redesign or performance compromise.

Frequently Asked Questions (FAQ)

Q: Can V300LA40CP be used as a direct replacement for V300LA40C? A: Yes. Both components have identical varistor voltage ratings (470V typical), surge current capability (10kA), energy absorption (335J), operating temperature range (-55°C to 85°C), and through-hole disc 20mm package configuration. Electrical and mechanical compatibility is complete.

Q: What is the primary difference between these two part numbers? A: The V300LA40C is classified as obsolete, while the V300LA40CP maintains active product status. The V300LA40CP is the current production equivalent and is recommended for new designs and ongoing procurement.

Q: Are there packaging differences between V300LA40C and V300LA40CP? A: Both parts use identical through-hole disc 20mm packaging. The V300LA40C was supplied in standard packaging, while the V300LA40CP is available in bulk packaging format.

Q: Do both parts meet the same compliance standards? A: Yes. Both the V300LA40C and V300LA40CP are ROHS3 compliant with MSL rating of 1 (Unlimited). Both carry EAR99 export classification and share the same HTSUS code (8533.40.4000).

Q: What electrical parameters must match for substitution? A: Critical parameters for substitution include varistor voltage (470V nominal, 423V-517V range), surge current (10kA), energy absorption (335J), maximum AC voltage (300V), and capacitance at 1MHz (7000pF).