V275LA2 Equivalent & Substitute Parts

Part Overview

The V275LA2 is a 450 V, 1.2 kA disc varistor manufactured by Littelfuse Inc. in the LA series, designed for transient voltage suppression in through-hole applications with a 7mm package footprint. The V275LA2 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. Active alternatives with identical or compatible electrical and mechanical specifications are available from Littelfuse and other manufacturers.

Key Parameters

Parameter	Value
Maximum AC Volts	275 V
Maximum DC Volts	369 V
Varistor Voltage (Typical)	450 V
Varistor Voltage Range	405 V – 495 V
Current - Surge	1.2 kA
Energy	23 J
Number of Circuits	1
Capacitance @ Frequency	80 pF @ 1 MHz
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 for the V275LA2 is determined by strict equivalence across the following critical parameters:

Maximum AC Volts: 275 V
Maximum DC Volts: 369 V
Varistor Voltage (Typical): 450 V
Current - Surge: 1.2 kA
Energy: 23 J
Mounting Type: Through Hole
Package / Case: Disc 7mm
Operating Temperature Range: -55°C to 85°C
RoHS Status: ROHS3 Compliant

Littelfuse LA and LC series parts meeting all electrical and mechanical parameters are direct parametric equivalents. The Panasonic ERZ-V07D431 is listed as a manufacturer-recommended alternative but operates at different electrical specifications (430 V typical, 1.75 kA surge, 40 J energy) and a larger package footprint (8.5mm), requiring application-level verification.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Max AC (V)	Max DC (V)	Varistor V (Typ)	Surge Current (kA)	Energy (J)	Package	Temp Range (°C)	RoHS
V275LA2	Littelfuse Inc.	LA	Obsolete	275	369	450	1.2	23	Disc 7mm	-55 to 85	ROHS3
V275LA2P	Littelfuse Inc.	LA	Active	275	369	450	1.2	23	Disc 7mm	-55 to 85	ROHS3
V275LA2PX1347	Littelfuse	LA	Active	275	369	450	1.2	23	Disc 7mm	-55 to 85	ROHS3
V275LA2PX2855	Littelfuse Inc.	LA	Active	275	369	450	1.2	23	Disc 7mm	-55 to 85	ROHS3
V275LC2P	Littelfuse Inc.	LC	Active	275	369	450	1.2	23	Disc 7mm	-55 to 85	ROHS3
V275LC2PX2855	Littelfuse Inc.	LC	Active	275	369	450	1.2	23	Disc 7mm	-55 to 85	ROHS3
ERZ-V07D431	Panasonic Electronic Components	ZNR®	Active	275	350	430	1.75	40	Disc 8.5mm	-40 to 85	ROHS3

Engineering Selection Recommendations

For direct replacement of the obsolete V275LA2, select from the active Littelfuse LA and LC series parts: V275LA2P, V275LA2PX1347, V275LA2PX2855, V275LC2P, or V275LC2PX2855. These parts maintain identical electrical specifications and package geometry, ensuring pin-for-pin compatibility and equivalent circuit performance.

The Panasonic ERZ-V07D431 is listed as a manufacturer-recommended alternative but differs in maximum DC voltage (350 V vs. 369 V), varistor voltage (430 V vs. 450 V), surge current rating (1.75 kA vs. 1.2 kA), energy dissipation (40 J vs. 23 J), and package size (8.5mm vs. 7mm). This part is suitable only for applications where these parameter differences are acceptable and have been validated for the specific circuit design.

All recommended substitutes are ROHS3 compliant and carry active product status with established supply chains.

Frequently Asked Questions (FAQ)

Q: Can V275LA2P be used as a direct replacement for V275LA2?

A: Yes. V275LA2P is an active Littelfuse part with identical electrical specifications (450 V typical, 1.2 kA surge, 23 J energy) and package footprint (Disc 7mm). The only difference is product status (active vs. obsolete) and packaging format (bulk vs. tape/reel).

Q: What is the difference between LA and LC series parts?

A: Both LA and LC series parts listed (V275LA2P, V275LA2PX1347, V275LA2PX2855, V275LC2P, V275LC2PX2855) meet identical electrical and mechanical specifications for this application. Series designation reflects internal manufacturing or design revision but does not affect electrical performance or compatibility.

Q: Can ERZ-V07D431 replace V275LA2?

A: ERZ-V07D431 is not a direct equivalent. It operates at 430 V typical (vs. 450 V), 350 V maximum DC (vs. 369 V), 1.75 kA surge (vs. 1.2 kA), and uses a larger 8.5mm package (vs. 7mm). Application-level circuit analysis is required to determine if these parameter differences are acceptable for your design.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All Littelfuse LA and LC series substitutes and the Panasonic ERZ-V07D431 are ROHS3 compliant.

Q: What does the suffix (P, PX1347, PX2855) indicate on Littelfuse part numbers?

A: These suffixes represent internal Littelfuse manufacturing codes or tape/reel configurations. They do not affect electrical specifications or circuit performance. All variants with identical base specifications are functionally equivalent.

Q: Is the operating temperature range identical across all substitutes?

A: Littelfuse LA and LC series substitutes maintain the -55°C to 85°C range. The Panasonic ERZ-V07D431 operates at -40°C to 85°C, which is a narrower range at the lower temperature limit.

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