V275LS20A Equivalent & Substitute Parts

Part Overview

The V275LS20A is a 430 V, 4.5 kA disc varistor manufactured by Littelfuse Inc. in the LS series. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The varistor provides transient voltage suppression in through-hole disc 14mm packaging with ROHS3 compliance and unlimited moisture sensitivity rating.

Key Parameters

Parameter	Value
Maximum AC Volts	275 V
Maximum DC Volts	369 V
Varistor Voltage (Typ)	430 V
Current - Surge	4.5 kA
Energy	75 J
Number of Circuits	1
Capacitance @ 1 MHz	450 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 14mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the V275LS20A is determined by strict equivalence across the following critical parameters:

Maximum AC Volts: 275 V
Maximum DC Volts: 369 V
Varistor Voltage (Typ): 430 V
Current - Surge: 4.5 kA
Energy: 75 J
Number of Circuits: 1
Capacitance @ 1 MHz: 450 pF
Operating Temperature Range: -55°C to 85°C
Mounting Type: Through Hole
Package / Case: Disc 14mm
RoHS Status: ROHS3 Compliant

Littelfuse LS, LT, and LU series variants meet these criteria with identical electrical and mechanical specifications. Packaging differences (Cut Tape, Tape & Reel, or Bulk) do not affect functional equivalence. The Vicor 30076 shares electrical parameters but differs in varistor voltage minimum specification and manufacturer series designation.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Packaging	Max AC (V)	Max DC (V)	Varistor Voltage Typ (V)	Surge Current (kA)	Energy (J)	Capacitance @ 1 MHz (pF)	Temp Range (°C)	RoHS
V275LS20A	Littelfuse Inc.	LS	Obsolete	Bulk	275	369	430	4.5	75	450	-55 to 85	ROHS3
V275LS20AP	Littelfuse Inc.	LS	Active	Cut Tape	275	369	430	4.5	75	450	-55 to 85	ROHS3
V275LS20APX2855	Littelfuse Inc.	LS	Active	Tape & Reel	275	369	430	4.5	75	450	-55 to 85	ROHS3
V275LT20AP	Littelfuse Inc.	LT	Active	Cut Tape	275	369	430	4.5	75	450	-55 to 85	ROHS3
V275LT20APX2855	Littelfuse Inc.	LT	Active	Tape & Reel	275	369	430	4.5	75	450	-55 to 85	ROHS3
V275LU20AP	Littelfuse Inc.	LU	Active	Tape & Reel	275	369	430	4.5	75	450	-55 to 85	ROHS3
V275LU20APX2855	Littelfuse Inc.	LU	Active	Tape & Reel	275	369	430	4.5	75	450	-55 to 85	ROHS3
30076	Vicor Corporation	ENMods™	Active	Bulk	275	369	270	4.5	75	450	-55 to 85	ROHS3

Engineering Selection Recommendations

For direct replacement of the obsolete V275LS20A, select from active Littelfuse LS, LT, or LU series variants. All maintain identical electrical specifications and ROHS3 compliance. Choice between these options depends on procurement packaging requirements:

V275LS20AP or V275LT20AP for Cut Tape packaging
V275LS20APX2855, V275LT20APX2855, V275LU20AP, or V275LU20APX2855 for Tape & Reel packaging

The Vicor 30076 is electrically compatible with matching surge current, energy, and thermal specifications. However, the varistor voltage typical value differs at 270 V versus 430 V, placing it outside strict parametric equivalence for the V275LS20A. Selection of the 30076 requires application-level voltage tolerance verification.

Frequently Asked Questions (FAQ)

Q: Can I use V275LT20AP or V275LU20AP as direct replacements for V275LS20A?

A: Yes. The LS, LT, and LU series variants share identical electrical parameters: 275 V maximum AC, 369 V maximum DC, 430 V typical varistor voltage, 4.5 kA surge current, 75 J energy, and -55°C to 85°C operating range. Series designation reflects internal design variations that do not affect functional performance in this voltage and current class.

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

A: Packaging format affects procurement and assembly handling only. Cut Tape (CT) provides individual component strips for manual or semi-automated placement. Tape & Reel (TR) supplies components on continuous reels for high-speed automated assembly. Electrical and mechanical specifications remain identical.

Q: Is the Vicor 30076 a suitable substitute?

A: The 30076 matches surge current (4.5 kA), energy (75 J), capacitance (450 pF), and temperature range (-55°C to 85°C). However, the typical varistor voltage is 270 V, not 430 V. This difference requires application-level assessment to confirm voltage tolerance compatibility before selection.

Q: Why is V275LS20A listed as obsolete?

A: Littelfuse has transitioned this part to active status under alternative series designations (LS, LT, LU) with identical specifications. The original V275LS20A bulk packaging variant is no longer manufactured, but functional equivalents remain in production.

Q: Are all substitutes ROHS3 compliant?

A: Yes. All Littelfuse variants (V275LS20AP, V275LT20AP, V275LU20AP and their Tape & Reel counterparts) and the Vicor 30076 carry ROHS3 compliance certification.

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