V385LC40BP Equivalent & Substitute Parts

Part Overview

The V385LC40BP is a 620V, 6.5kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component operates across a temperature range of -55°C to 85°C and is ROHS3 compliant. The part is currently active in production with 1045 units in stock. Equivalent substitute parts are identified based on matching electrical specifications and mechanical compatibility to support procurement flexibility and supply chain continuity.

Substiute Parts

V385LC40BP

Littelfuse Inc.In Stock: 1111V385LC40BP Datasheet

Current PartRFQ

V385LA40BP

Littelfuse Inc.In Stock: 1571V385LA40BP Datasheet

Parametric EquivalentRFQ

V385LA40B

Harris CorporationIn Stock: 1973V385LA40B Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the V385LC40BP are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Maximum AC Volts: 385 V
• Maximum DC Volts: 505 V
• Varistor Voltage (Typical): 620 V
• Varistor Voltage Range: 558 V – 682 V
• Current - Surge: 6.5 kA
• Energy Absorption: 160 J
• Capacitance @ 1 MHz: 700 pF
• Operating Temperature: -55°C to 85°C

Mechanical Parameters (Must Match):

• Mounting Type: Through Hole
• Package / Case: Disc 20mm
• Number of Circuits: 1

Two substitute parts meet these criteria: V385LA40BP (Littelfuse Inc.) and V385LA40B (Harris Corporation). Both maintain identical electrical and mechanical specifications, enabling direct substitution in circuit designs.

Parameter Comparison

Engineering Selection Recommendations

V385LA40BP (Littelfuse Inc.): This substitute maintains full electrical and mechanical equivalence to the V385LC40BP. Both parts are ROHS3 compliant and carry identical moisture sensitivity ratings (MSL 1). This part is recommended for applications requiring strict RoHS compliance and represents the primary equivalent option.

V385LA40B (Harris Corporation): This substitute matches all electrical and mechanical specifications but differs in compliance certifications. The part is RoHS non-compliant and carries a higher moisture sensitivity level (MSL 3, 168 hours). Selection of this part is appropriate only for applications where RoHS compliance is not required and moisture exposure is controlled within the specified MSL 3 limits.

Frequently Asked Questions (FAQ)

Q: Can V385LA40BP be used as a direct replacement for V385LC40BP? A: Yes. Both parts share identical electrical parameters (620V typical varistor voltage, 6.5kA surge current, 160J energy), mechanical configuration (through-hole, 20mm disc package), and compliance status (ROHS3 compliant, MSL 1). Direct substitution is supported.

Q: What are the key differences between V385LA40B and the main part? A: The V385LA40B maintains electrical and mechanical equivalence but differs in two areas: it is RoHS non-compliant and carries MSL 3 (168-hour moisture sensitivity) versus MSL 1 (unlimited) for the main part. These differences affect suitability for regulated applications and storage conditions.

Q: Are all three parts mechanically interchangeable? A: Yes. All three parts use identical through-hole mounting with a 20mm disc package, enabling direct PCB layout compatibility without design modification.

Q: Which substitute should be selected for RoHS-regulated applications? A: V385LA40BP is the appropriate choice for RoHS-compliant designs, as it maintains ROHS3 certification matching the V385LC40BP. V385LA40B is not suitable for RoHS-regulated applications.

Q: What is the significance of the different moisture sensitivity levels? A: MSL 1 (unlimited) allows indefinite storage without moisture control. MSL 3 (168 hours) requires storage in controlled humidity environments and limits the time the component can be exposed to ambient conditions before soldering. This affects supply chain handling and production scheduling.