V275LT2 Equivalent & Substitute Parts

Part Overview

The V275LT2 is a 450 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. Littelfuse offers multiple active alternatives that maintain identical electrical and mechanical specifications while providing improved product availability and compliance status.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	450 V
Current - Surge	1.2 kA
Maximum AC Volts	275 V
Maximum DC Volts	369 V
Energy	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 V275LT2 is based on strict equivalence across all electrical and mechanical parameters. All substitute parts maintain identical varistor voltage specifications (405 V minimum, 450 V typical, 495 V maximum), surge current rating (1.2 kA), energy dissipation (23 J), capacitance (80 pF @ 1 MHz), operating temperature range (-55°C to 85°C), and physical form factor (disc 7mm through-hole package).

The substitute parts are differentiated by series designation (LT, LS, LU) and packaging configuration (Cut Tape, Tape & Reel). All substitutes are manufactured by Littelfuse Inc. and maintain ROHS3 compliance. The primary distinction between the main part and substitutes is product status: V275LT2 is obsolete, while all listed substitutes are active products with current manufacturing support.

Parameter Comparison

Part Number	Manufacturer	Series	Packaging	Product Status	Varistor Voltage (Typ)	Surge Current	Energy	Operating Temp	RoHS Status	Inventory (Pcs)
V275LT2	Littelfuse Inc.	LT	Bulk	Obsolete	450 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	660
V275LT2P	Littelfuse Inc.	LT	Tape & Reel (TR)	Active	450 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	1031
V275LS2P	Littelfuse Inc.	LS	Cut Tape (CT)	Active	450 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	11160
V275LS2PX2855	Littelfuse Inc.	LS	Tape & Reel (TR)	Active	450 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	936
V275LT2PX2855	Littelfuse Inc.	LT	Tape & Reel (TR)	Active	450 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	689
V275LU2P	Littelfuse Inc.	LU	Tape & Reel (TR)	Active	450 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	3200
V275LU2PX2855	Littelfuse Inc.	LU	Tape & Reel (TR)	Active	450 V	1.2 kA	23 J	-55°C to 85°C	ROHS3	1018

Engineering Selection Recommendations

For applications currently using the obsolete V275LT2, direct substitution is supported by V275LT2P, which maintains identical electrical specifications and series designation while offering active product status and improved availability. V275LT2P is packaged in Tape & Reel format, suitable for automated assembly processes.

For applications requiring alternative series options, V275LS2P and V275LU2P provide parametric equivalence with active product status. V275LS2P is available in Cut Tape packaging with the highest inventory level (11,160 units), making it suitable for high-volume procurement. V275LU2P is available in Tape & Reel format with substantial inventory (3,200 units).

All substitute parts maintain ROHS3 compliance and identical electrical performance across the specified operating temperature range. Selection between active substitutes should be based on packaging requirements and procurement lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can V275LT2P be used as a direct replacement for V275LT2?

A: Yes. V275LT2P is a direct substitute with identical electrical specifications (450 V typical varistor voltage, 1.2 kA surge current, 23 J energy) and mechanical form factor (disc 7mm through-hole). The primary difference is packaging format (Tape & Reel versus bulk) and active product status.

Q: What is the difference between V275LT2P, V275LS2P, and V275LU2P?

A: These parts are parametric equivalents with identical electrical and mechanical specifications. The differences are series designation (LT, LS, LU) and packaging availability. All three maintain 450 V typical varistor voltage, 1.2 kA surge current, and disc 7mm through-hole configuration.

Q: Are the X2855 variants (V275LT2PX2855, V275LS2PX2855, V275LU2PX2855) electrically equivalent to their non-X2855 counterparts?

A: Yes. The X2855 designation indicates a specific tape and reel configuration. Electrical and mechanical specifications remain identical to the base part numbers.

Q: Which substitute part has the best availability?

A: V275LS2P has the highest inventory level at 11,160 units in Cut Tape packaging. V275LU2P offers 3,200 units in Tape & Reel format.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and are manufactured by Littelfuse Inc.

Q: What packaging format should I select for automated assembly?

A: Tape & Reel (TR) packaging is standard for automated pick-and-place assembly. Available options include V275LT2P, V275LS2PX2855, V275LT2PX2855, V275LU2P, and V275LU2PX2855. Cut Tape (CT) packaging (V275LS2P) is suitable for manual or semi-automated assembly.

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