V575LS40A Equivalent & Substitute Parts

Part Overview

The V575LS40A is a 910 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. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	910 V
Current - Surge	4.5 kA
Maximum AC Volts	575 V
Maximum DC Volts	730 V
Energy	120 J
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 14mm
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

All substitute parts for the V575LS40A are parametric equivalents sharing identical electrical ratings and mechanical form factors. Substitution is determined by the following criteria:

Varistor voltage range: 819 V (Min) to 1.001 kV (Max)
Surge current capacity: 4.5 kA
Energy dissipation: 120 J
Disc package: 14mm diameter
Through-hole mounting configuration
Operating temperature: -55°C to 85°C
RoHS3 compliance

Substitute parts differ only in series designation (LS, LT, LU) and packaging format (bulk, cut tape, or tape & reel). All variants are manufactured by Littelfuse Inc. and maintain active product status.

Parameter Comparison

Part Number	Series	Packaging	Product Status	Varistor Voltage (Typ)	Surge Current	Max AC / DC Volts	Energy	Inventory (Pcs)
V575LS40A	LS	Bulk	Obsolete	910 V	4.5 kA	575 V / 730 V	120 J	868
V575LS40AP	LS	Tape & Reel (TR)	Active	910 V	4.5 kA	575 V / 730 V	120 J	915
V575LS40APX2855	LS	Tape & Reel (TR)	Active	910 V	4.5 kA	575 V / 730 V	120 J	2200
V575LT40AP	LT	Cut Tape (CT)	Active	910 V	4.5 kA	575 V / 730 V	120 J	6983
V575LT40APX2855	LT	Tape & Reel (TR)	Active	910 V	4.5 kA	575 V / 730 V	120 J	759
V575LU40AP	LU	Tape & Reel (TR)	Active	910 V	4.5 kA	575 V / 730 V	120 J	1028
V575LU40APX2855	LU	Tape & Reel (TR)	Active	910 V	4.5 kA	575 V / 730 V	120 J	765

Engineering Selection Recommendations

All substitute parts maintain full electrical and mechanical compatibility with the V575LS40A. Selection should be based on:

Product Status: All substitute parts carry active product status, ensuring long-term availability and manufacturing support compared to the obsolete V575LS40A.

Compliance: All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Packaging Considerations:

Tape & Reel (TR) packaging is suitable for automated assembly processes
Cut Tape (CT) packaging accommodates semi-automated or manual assembly
Bulk packaging is no longer available in active variants

Inventory Availability: V575LT40AP offers the highest stock level (6983 pcs), followed by V575LS40APX2855 (2200 pcs), supporting high-volume procurement requirements.

Frequently Asked Questions (FAQ)

Q: Can V575LS40AP directly replace V575LS40A? A: Yes. V575LS40AP is a parametric equivalent with identical electrical ratings and mechanical specifications. The difference is packaging format (tape & reel versus bulk) and active product status.

Q: What is the difference between LS, LT, and LU series designations? A: Series designation indicates internal design variants within the Littelfuse varistor product line. All three series maintain identical electrical performance for this voltage and current rating.

Q: Does packaging format affect electrical performance? A: No. Tape & Reel (TR) and Cut Tape (CT) packaging formats do not alter electrical characteristics. Selection depends on assembly process requirements and handling procedures.

Q: Are all substitutes RoHS3 compliant? A: Yes. All substitute parts listed are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Which substitute offers the best availability? A: V575LT40AP (Cut Tape format) provides the highest inventory level at 6983 pcs. V575LS40APX2855 (Tape & Reel format) offers 2200 pcs for automated assembly applications.

Q: Can I mix different series (LS, LT, LU) in the same design? A: Yes. All series variants are parametric equivalents with identical electrical and thermal specifications, allowing interchangeable use within the same circuit design.

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