V275LU4 Equivalent & Substitute Parts

Part Overview

The V275LU4 is a 430 V, 1.2 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. The varistor provides protection against voltage transients with a typical varistor voltage of 430 V and energy absorption capacity of 23 J. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	430 V
Current - Surge	1.2 kA
Maximum AC Volts	275 V
Maximum DC Volts	369 V
Energy	23 J
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 7mm
Capacitance @ 1 MHz	80 pF
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the V275LU4 are qualified based on strict electrical and mechanical parameter equivalence. All substitute parts maintain identical specifications across the following critical parameters: varistor voltage range (387 V minimum to 473 V maximum, 430 V typical), surge current rating (1.2 kA), maximum AC and DC voltage ratings (275 V AC, 369 V DC), energy absorption (23 J), operating temperature range (-55°C to 85°C), package form factor (Disc 7mm through-hole), and capacitance (80 pF @ 1 MHz). Substitutes differ only in packaging format (Tape & Reel versus Cut Tape) and product series designation (LU, LS, LT), with all active substitutes offering ROHS3 compliance and REACH unaffected status. The V275LU4P represents the direct equivalent with identical series designation but active product status. The V275LS4P and V275LT4P series provide parametric equivalence with alternative series designations. Tape & Reel packaged variants (V275LU4PX2855, V275LS4PX2855, V275LT4PX2855) offer the same electrical performance with reel packaging for automated assembly.

Parameter Comparison

Part Number	Manufacturer	Series	Packaging	Product Status	Varistor Voltage (Typ)	Surge Current	Energy	Operating Temp	RoHS Status	Inventory (Pcs)
V275LU4	Littelfuse Inc.	LU	Bulk	Obsolete	430 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	832
V275LU4P	Littelfuse Inc.	LU	Tape & Reel	Active	430 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	716
V275LS4P	Littelfuse Inc.	LS	Cut Tape	Active	430 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	1301
V275LS4PX2855	Littelfuse Inc.	LS	Tape & Reel	Active	430 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	1093
V275LT4P	Littelfuse Inc.	LT	Cut Tape	Active	430 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	31246
V275LT4PX2855	Littelfuse Inc.	LT	Tape & Reel	Active	430 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	1149
V275LU4PX2855	Littelfuse Inc.	LU	Tape & Reel	Active	430 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	918

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical compatibility with the V275LU4 based on identical parametric specifications. Selection among active substitutes should be based on packaging requirements and inventory availability. For manual assembly or prototype applications, Cut Tape packaging (V275LS4P, V275LT4P) provides cost-effective sourcing. For automated production environments, Tape & Reel variants (V275LU4PX2855, V275LS4PX2855, V275LT4PX2855) are appropriate. The V275LT4P offers the highest inventory availability (31,246 pcs) among Cut Tape options. All substitutes carry ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. Series designation differences (LU, LS, LT) do not affect electrical performance or mechanical fit within the specified through-hole disc 7mm form factor.

Frequently Asked Questions (FAQ)

Q: Can V275LU4 substitutes be used interchangeably in existing designs? A: Yes. All listed substitutes maintain identical varistor voltage (430 V typical), surge current (1.2 kA), energy absorption (23 J), operating temperature range (-55°C to 85°C), and through-hole disc 7mm package form factor. Electrical performance and mechanical fit are equivalent.

Q: What is the difference between Cut Tape and Tape & Reel packaging? A: Cut Tape (CT) packaging is suitable for manual assembly and small-volume production. Tape & Reel (TR) packaging with X2855 designation is designed for automated pick-and-place assembly systems. Electrical specifications are identical; packaging format differs only.

Q: Why is the V275LU4 marked as obsolete? A: The V275LU4 is classified as obsolete, indicating discontinued production. Active equivalent substitutes (V275LU4P, V275LS4P, V275LT4P, and their Tape & Reel variants) provide continued design support and procurement options.

Q: Are all substitutes ROHS3 compliant? A: Yes. All substitute parts listed carry ROHS3 compliance and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: Which substitute offers the best availability? A: The V275LT4P (Cut Tape) provides the highest inventory availability at 31,246 pcs. For Tape & Reel applications, V275LU4PX2855 and V275LS4PX2855 offer substantial stock levels (918 and 1,093 pcs respectively).

Q: Do series designations (LU, LS, LT) affect performance? A: No. Series designations represent internal Littelfuse product line classifications. All series variants maintain identical electrical specifications, varistor voltage characteristics, surge current ratings, and mechanical dimensions.

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