V320LC20A Equivalent & Substitute Parts

Part Overview

The V320LC20A is a 510 V, 4.5 kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The varistor provides single-circuit protection with a 14mm disc form factor and operates across a temperature range of -55°C to 85°C.

Substiute Parts

V320LC20A

Littelfuse Inc.In Stock: 985V320LC20A Datasheet

Current PartRFQ

V320LC20AP

Littelfuse Inc.In Stock: 2276V320LC20AP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V320LC20A is based on electrical and mechanical parameter equivalence. The primary substitute, V320LC20AP, maintains identical electrical specifications across all critical parameters: varistor voltage range (459 V minimum to 561 V maximum), surge current capacity (4.5 kA), energy rating (80 J), and thermal operating range (-55°C to 85°C). Both parts share the same through-hole mounting configuration and 14mm disc package form factor, ensuring mechanical compatibility in existing PCB layouts.

The substitution is valid because the following parameters are identical:

• Varistor Voltage (Min/Typ/Max): 459 V / 510 V / 561 V
• Current - Surge: 4.5 kA
• Maximum AC/DC Volts: 320 V / 420 V
• Energy: 80 J
• Number of Circuits: 1
• Mounting Type: Through Hole
• Package / Case: Disc 14mm
• Operating Temperature: -55°C to 85°C
• Capacitance @ 1 MHz: 380 pF

Parameter Comparison

Engineering Selection Recommendations

The V320LC20AP is the direct equivalent substitute for the obsolete V320LC20A. Both components are manufactured by Littelfuse Inc. within the LC series and maintain complete electrical and mechanical compatibility. The V320LC20AP carries active product status, ensuring long-term availability and supply chain continuity.

Both parts meet ROHS3 compliance requirements and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8533.40.4000). The V320LC20AP is available in bulk packaging, whereas the V320LC20A was supplied in standard packaging. This difference does not affect electrical or mechanical performance in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can V320LC20AP be used as a direct replacement for V320LC20A in existing designs?

A: Yes. The V320LC20AP is electrically and mechanically identical to the V320LC20A across all specified parameters, including varistor voltage, surge current capacity, energy rating, operating temperature range, and physical form factor. No circuit modifications are required.

Q: What is the primary difference between V320LC20A and V320LC20AP?

A: The V320LC20A is obsolete, while V320LC20AP is active. Both parts are from the Littelfuse LC series and share identical electrical specifications and 14mm disc through-hole packaging. The substitute offers improved supply availability.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts are ROHS3 compliant, carry MSL rating 1 (Unlimited), and share identical ECCN and HTSUS classifications. Regulatory and environmental compliance is equivalent.

Q: Does packaging format affect substitution compatibility?

A: Packaging format (bulk versus standard) does not affect electrical or mechanical performance. The V320LC20AP in bulk packaging is suitable for all applications where the V320LC20A was used.

Q: What are the critical parameters for substitution validation?

A: Substitution is valid when the following parameters match: varistor voltage range (459–561 V), surge current (4.5 kA), energy rating (80 J), mounting type (through hole), package form factor (14mm disc), and operating temperature range (-55°C to 85°C).