Littelfuse V275LA4 Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The Littelfuse V275LA4 is a 430 V, 1.2 kA disc varistor designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Active alternatives with identical electrical and mechanical specifications are available from the same manufacturer series.

Key Parameters

Parameter	Value
Maximum AC Volts	275 V
Maximum DC Volts	369 V
Varistor Voltage (Typical)	430 V
Varistor Voltage Range	387 V (Min) – 473 V (Max)
Current - Surge	1.2 kA
Energy Absorption	23 J
Number of Circuits	1
Capacitance @ 1 MHz	80 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 7mm
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the V275LA4 is determined by strict equivalence across all electrical and mechanical parameters. The following criteria define valid substitutes:

Varistor voltage range: 387 V (Min) to 473 V (Max)
Surge current rating: 1.2 kA
Energy absorption: 23 J
Mounting type: Through Hole
Package: Disc 7mm
Operating temperature: -55°C to 85°C
Capacitance: 80 pF @ 1 MHz
RoHS3 compliance

All substitute parts listed meet these exact specifications. Differences in product status (Active vs. Obsolete) and packaging format (Bulk vs. standard) do not affect electrical or mechanical compatibility.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Max AC Volts	Max DC Volts	Varistor Voltage (Typ)	Surge Current	Energy	Package	Inventory Status
V275LA4	Littelfuse Inc.	LA	Obsolete	275 V	369 V	430 V	1.2 kA	23 J	Disc 7mm	1122 Pcs
V275LA4P	Littelfuse Inc.	LA	Active	275 V	369 V	430 V	1.2 kA	23 J	Disc 7mm	35400 Pcs
V275LA4PX2855	Littelfuse Inc.	LA	Active	275 V	369 V	430 V	1.2 kA	23 J	Disc 7mm	9697 Pcs
V275LC4P	Littelfuse Inc.	LC	Active	275 V	369 V	430 V	1.2 kA	23 J	Disc 7mm	1039 Pcs
V275LC4PX2855	Littelfuse Inc.	LC	Active	275 V	369 V	430 V	1.2 kA	23 J	Disc 7mm	655 Pcs

Engineering Selection Recommendations

All listed substitute parts are manufactured by Littelfuse Inc. and maintain full electrical and mechanical equivalence to the V275LA4. The primary distinction is product status: the original V275LA4 is obsolete, while all substitutes are active components.

For new designs and production continuity, V275LA4P is the direct replacement, maintaining the LA series designation. V275LA4PX2855 and V275LC4P variants are parametrically equivalent alternatives within the same voltage and current class. All substitutes carry ROHS3 compliance and identical environmental ratings.

Packaging format differences (Bulk) do not affect component performance or board-level compatibility. Selection should prioritize availability and supply chain requirements.

Frequently Asked Questions (FAQ)

Q: Can V275LA4P be used as a direct replacement for V275LA4?

A: Yes. V275LA4P is the active equivalent of the obsolete V275LA4, with identical electrical specifications (430 V typical varistor voltage, 1.2 kA surge current, 23 J energy) and mechanical form factor (Disc 7mm through-hole).

Q: What is the difference between V275LA4P and V275LC4P?

A: Both parts are parametrically equivalent with identical voltage, current, and energy ratings. The difference is series designation (LA vs. LC). Both are active products and fully interchangeable based on provided electrical and mechanical parameters.

Q: Are the X2855 variants (V275LA4PX2855, V275LC4PX2855) compatible with the original V275LA4?

A: Yes. The X2855 designation indicates a packaging or tape/reel variant. All electrical and mechanical specifications remain identical to the base part numbers, including varistor voltage range, surge current, and package form factor.

Q: Does the Bulk packaging format affect compatibility?

A: No. Bulk packaging is a supply format only and does not affect component electrical performance or board-level installation. The through-hole Disc 7mm package remains unchanged.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 Compliant status and are suitable for applications requiring RoHS compliance.

Q: What is the operating temperature range for these parts?

A: All parts operate within -55°C to 85°C (TA), providing equivalent thermal performance across the entire substitute group.

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