V275LS4 Equivalent & Substitute Parts

Part Overview

The V275LS4 is a 430 V, 1.2 kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in single-circuit through-hole applications. This component operates across a temperature range of -55°C to 85°C and is ROHS3 compliant with unlimited moisture sensitivity rating.

The V275LS4 carries an obsolete product status. Identifying parametrically equivalent substitute parts ensures design continuity and supply chain reliability for applications requiring 430 V varistor protection with identical electrical and mechanical specifications.

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
Capacitance @ 1 MHz	80 pF
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 7mm
Number of Circuits	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the V275LS4 are qualified based on strict parametric equivalence across all electrical and mechanical specifications. The following criteria determine substitutability:

Electrical Parameters (Must Match):

Varistor Voltage (Typ): 430 V
Varistor Voltage Range: 387 V (Min) to 473 V (Max)
Current - Surge: 1.2 kA
Maximum AC Volts: 275 V
Maximum DC Volts: 369 V
Energy: 23 J
Capacitance @ 1 MHz: 80 pF

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package / Case: Disc 7mm
Number of Circuits: 1

Compliance Parameters (Must Match):

RoHS Status: ROHS3 Compliant
Operating Temperature: -55°C to 85°C

All substitute parts listed maintain identical electrical performance, mechanical form factor, and regulatory compliance. Packaging format (Cut Tape, Tape & Reel) represents the only variable, determined by procurement and assembly requirements rather than functional capability.

Parameter Comparison

Part Number	Manufacturer	Series	Product Status	Packaging	Varistor Voltage (Typ)	Current - Surge	Max AC Volts	Max DC Volts	Energy	Capacitance @ 1 MHz	Operating Temp	Package / Case	RoHS Status	Inventory
V275LS4	Littelfuse Inc.	LS	Obsolete	—	430 V	1.2 kA	275 V	369 V	23 J	80 pF	-55°C to 85°C	Disc 7mm	ROHS3	1164 Pcs
V275LS4P	Littelfuse Inc.	LS	Active	Cut Tape (CT)	430 V	1.2 kA	275 V	369 V	23 J	80 pF	-55°C to 85°C	Disc 7mm	ROHS3	1301 Pcs
V275LS4PX2855	Littelfuse Inc.	LS	Active	Tape & Reel (TR)	430 V	1.2 kA	275 V	369 V	23 J	80 pF	-55°C to 85°C	Disc 7mm	ROHS3	1093 Pcs
V275LT4P	Littelfuse Inc.	LT	Active	Cut Tape (CT)	430 V	1.2 kA	275 V	369 V	23 J	80 pF	-55°C to 85°C	Disc 7mm	ROHS3	31246 Pcs
V275LT4PX2855	Littelfuse	LT	Active	Tape & Reel (TR)	430 V	1.2 kA	275 V	369 V	23 J	80 pF	-55°C to 85°C	Disc 7mm	ROHS3	1149 Pcs
V275LU4P	Littelfuse Inc.	LU	Active	Tape & Reel (TR)	430 V	1.2 kA	275 V	369 V	23 J	80 pF	-55°C to 85°C	Disc 7mm	ROHS3	716 Pcs
V275LU4PX2855	Littelfuse Inc.	LU	Active	Tape & Reel (TR)	430 V	1.2 kA	275 V	369 V	23 J	80 pF	-55°C to 85°C	Disc 7mm	ROHS3	918 Pcs

Engineering Selection Recommendations

All substitute parts maintain active product status with ROHS3 compliance and REACH unaffected designation, ensuring regulatory continuity and long-term availability compared to the obsolete V275LS4.

Primary Recommendation: V275LT4P offers the highest inventory availability (31,246 units) with active product status and Cut Tape packaging suitable for standard component handling and assembly processes.

Alternative Selections by Packaging:

Cut Tape format: V275LS4P or V275LT4P
Tape & Reel format: V275LS4PX2855, V275LT4PX2855, V275LU4P, or V275LU4PX2855

Series designation (LS, LT, LU) represents internal Littelfuse manufacturing variants with identical electrical and mechanical performance. Selection between series variants should be based on procurement availability and assembly equipment compatibility rather than functional differences.

Frequently Asked Questions (FAQ)

Q: Can V275LT4P directly replace V275LS4 in existing designs? A: Yes. V275LT4P maintains identical electrical specifications (430 V typical varistor voltage, 1.2 kA surge current), mechanical form factor (Disc 7mm through-hole), and operating temperature range (-55°C to 85°C). The series designation change (LS to LT) reflects internal manufacturing classification without affecting circuit performance.

Q: What is the difference between Cut Tape and Tape & Reel packaging? A: Both packaging formats contain electrically and mechanically identical components. Cut Tape (CT) is supplied in individual strips suitable for manual handling and small-volume assembly. Tape & Reel (TR) format is optimized for automated pick-and-place assembly equipment and high-volume production. The X2855 suffix indicates Tape & Reel configuration.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification, maintaining regulatory equivalence with the original V275LS4 component.

Q: Why is V275LS4 marked as obsolete? A: Obsolete status indicates Littelfuse has discontinued active manufacturing and support for this specific part number. Active substitute variants (V275LS4P, V275LT4P, V275LU4P) provide identical functionality with ongoing manufacturer support and supply availability.

Q: Can I mix different series variants (LS, LT, LU) in the same application? A: Yes. All series variants maintain identical electrical performance and mechanical specifications. Mixing is permissible from a functional standpoint; however, procurement and assembly standardization on a single variant is recommended for inventory management and traceability.

Q: What compliance certifications apply to these parts? A: All substitute parts are ROHS3 compliant and REACH unaffected. ECCN classification is EAR99 for all variants. HTSUS code 8533.40.4000 applies uniformly across the product family.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message