V320LC40B Equivalent & Substitute Parts

Part Overview

The V320LC40B is a 501 V, 6.5 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse in a through-hole disc 20mm package. This component is designed for transient voltage protection in electronic circuits operating at 320 V AC maximum and 420 V DC maximum. The part is currently obsolete, making identification of suitable substitutes essential for ongoing maintenance, repair, and legacy system support.

Substiute Parts

V320LC40B

LittelfuseIn Stock: 1105V320LC40B Datasheet

Current PartRFQ

V320LC40BP

Littelfuse Inc.In Stock: 2780V320LC40BP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the V320LC40B is determined by strict equivalence across the following critical parameters:

• Maximum AC Volts: 320 V
• Maximum DC Volts: 420 V
• Varistor Voltage (Typical): 501 V
• Current - Surge: 6.5 kA
• Energy: 150 J
• Number of Circuits: 1
• Mounting Type: Through Hole
• Package / Case: Disc 20mm
• Operating Temperature Range: -55°C to 85°C

The V320LC40BP is a direct substitute, maintaining identical electrical specifications and mechanical form factor while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The V320LC40BP is a direct functional and mechanical equivalent to the V320LC40B. Both parts are manufactured by Littelfuse and maintain identical electrical performance across all specified parameters. The V320LC40BP offers the advantage of active product status, ensuring continued availability and manufacturing support. Both parts meet ROHS3 compliance requirements and are suitable for applications requiring 320 V AC / 420 V DC transient voltage suppression with 6.5 kA surge current capacity.

Frequently Asked Questions (FAQ)

Q: Can V320LC40BP be used as a direct replacement for V320LC40B?

A: Yes. The V320LC40BP is electrically and mechanically identical to the V320LC40B across all specified parameters, including voltage ratings, surge current capacity, energy dissipation, and package form factor.

Q: What is the difference between V320LC40B and V320LC40BP?

A: The primary difference is product status. The V320LC40B is obsolete, while the V320LC40BP is active. Both parts share identical electrical specifications and physical packaging.

Q: Are there any compliance differences between these parts?

A: No. Both parts are ROHS3 compliant and carry the same ECCN and HTSUS classifications.

Q: Can these parts be used interchangeably in PCB designs?

A: Yes. The identical through-hole disc 20mm package and electrical specifications ensure direct interchangeability in circuit designs.

Q: What is the operating temperature range for these varistors?

A: Both parts operate across -55°C to 85°C ambient temperature range.