V420LS40BP Equivalent & Substitute Parts

Part Overview

The V420LS40BP is a 665 V, 6.5 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse in a through-hole disc format (20mm). This component is designed for transient overvoltage protection in electronic circuits operating at maximum AC voltages of 420 V and maximum DC voltages of 560 V. The part is currently in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Alternative models are identified when packaging format changes are required or when inventory availability necessitates substitution while maintaining identical electrical performance.

Substiute Parts

V420LS40BP

LittelfuseIn Stock: 809V420LS40BP Datasheet

Current PartRFQ

V420LT40BP

Littelfuse Inc.In Stock: 3972V420LT40BP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The V420LT40BP qualifies as a parametric equivalent to the V420LS40BP based on the following criteria:

All electrical parameters are identical: varistor voltage range (610 V minimum to 720 V maximum, 665 V typical), surge current rating (6.5 kA), maximum AC/DC voltage ratings (420 V / 560 V), energy absorption (160 J), capacitance (600 pF @ 1 MHz), and operating temperature range (-55°C to 85°C).

The physical form factor is identical: through-hole mounting, disc 20mm package.

Compliance certifications are identical: ROHS3 compliant, MSL 1, REACH unaffected status.

The substitution difference is limited to packaging format: V420LS40BP is supplied in Tape & Reel (TR) format, while V420LT40BP is supplied in Cut Tape (CT) format. Both are manufactured by Littelfuse and belong to different series designations (LS versus LT) reflecting only the packaging distinction.

Parameter Comparison

Engineering Selection Recommendations

Both V420LS40BP and V420LT40BP are active production components with identical electrical and mechanical specifications. Selection between these parts should be based on packaging and supply chain requirements:

V420LS40BP (Tape & Reel format) is suitable for high-volume automated assembly operations where reel-based component feeding is standard.

V420LT40BP (Cut Tape format) is suitable for lower-volume applications, manual assembly processes, or situations where individual component handling is preferred.

Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility in equivalent applications. The choice between these substitutes does not affect circuit performance, thermal characteristics, or overvoltage protection capability.

Frequently Asked Questions (FAQ)

Q: Are V420LS40BP and V420LT40BP electrically identical?

A: Yes. Both parts have identical varistor voltage ratings (610 V to 720 V, 665 V typical), surge current capacity (6.5 kA), energy absorption (160 J), and operating temperature range (-55°C to 85°C). They provide equivalent transient voltage suppression performance.

Q: What is the difference between Tape & Reel and Cut Tape packaging?

A: Tape & Reel (TR) format supplies components on continuous reels suitable for automated pick-and-place assembly. Cut Tape (CT) format supplies components on tape segments, typically used for manual assembly or lower-volume production runs. The electrical component itself is identical.

Q: Can I use V420LT40BP as a direct replacement for V420LS40BP in my circuit?

A: Yes, from an electrical and mechanical standpoint. The only consideration is assembly process compatibility. If your production line uses automated reel-fed equipment, the Cut Tape format may require process adjustment. If manual assembly or tape-based feeding is used, V420LT40BP is directly compatible.

Q: Do both parts have the same compliance certifications?

A: Yes. Both V420LS40BP and V420LT40BP are ROHS3 compliant, have MSL 1 (unlimited moisture sensitivity), and REACH unaffected status.

Q: Are there any thermal or performance differences between these parts?

A: No. Both parts operate across the same temperature range (-55°C to 85°C) and have identical thermal and electrical performance characteristics.