Littelfuse V275LU4P Varistor: Equivalent & Substitute Parts

Part Overview

The Littelfuse V275LU4P is a 430 V, 1.2 kA disc varistor designed for transient voltage suppression applications. This through-hole component operates across a temperature range of -55°C to 85°C and is ROHS3 compliant. The part is currently active in production with 716 units in stock. Substitute parts are identified when packaging format changes or inventory availability requires alternative sourcing while maintaining 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
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

Substitute parts for the V275LU4P are qualified based on electrical parameter equivalence and mechanical compatibility. The following criteria determine substitutability:

Electrical Parameters (Must Match):

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

Mechanical Parameters (Must Match):

Mounting Type: Through Hole
Package / Case: Disc 7mm

Environmental & Compliance (Must Match):

Operating Temperature Range: -55°C to 85°C
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Variable Parameter (Allowed to Differ):

Packaging Format: Tape & Reel (TR) vs. Cut Tape (CT)

The V275LU4P (Tape & Reel packaging) is substitutable with V275LS4P and V275LT4P (both Cut Tape packaging) because all electrical, mechanical, and environmental specifications are identical. The packaging format difference does not affect component functionality or circuit performance.

Parameter Comparison

Parameter	V275LU4P (Main)	V275LS4P (Substitute)	V275LT4P (Substitute)
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)	Transient Voltage Suppressors (TVS)
Packaging	Tape & Reel (TR)	Cut Tape (CT)	Cut Tape (CT)
Series	LU	LS	LT
Varistor Voltage (Min)	387 V	387 V	387 V
Varistor Voltage (Typ)	430 V	430 V	430 V
Varistor Voltage (Max)	473 V	473 V	473 V
Current - Surge	1.2 kA	1.2 kA	1.2 kA
Maximum AC Volts	275 V	275 V	275 V
Maximum DC Volts	369 V	369 V	369 V
Energy	23 J	23 J	23 J
Number of Circuits	1	1	1
Capacitance @ 1 MHz	80 pF	80 pF	80 pF
Operating Temperature	-55°C to 85°C	-55°C to 85°C	-55°C to 85°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 7mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
Inventory (Pcs)	716	1301	31246

Engineering Selection Recommendations

All three parts—V275LU4P, V275LS4P, and V275LT4P—are active production components manufactured by Littelfuse Inc. with identical electrical and mechanical specifications. Selection between these parts is determined by packaging requirements and inventory availability:

V275LU4P (Tape & Reel): Use when tape and reel packaging is required for automated assembly processes. Current inventory: 716 units.

V275LS4P (Cut Tape): Use when cut tape packaging is acceptable. Current inventory: 1301 units.

V275LT4P (Cut Tape): Use when cut tape packaging is acceptable. Current inventory: 31246 units. Highest availability.

All parts meet ROHS3 compliance and REACH unaffected status. No functional or performance differences exist between these variants.

Frequently Asked Questions (FAQ)

Q: Can V275LS4P or V275LT4P be used as direct replacements for V275LU4P in circuit applications?

A: Yes. All three parts have identical electrical specifications (430 V typical varistor voltage, 1.2 kA surge current, 23 J energy) and mechanical form factors (through-hole, disc 7mm). The only difference is packaging format (tape & reel vs. cut tape), which does not affect circuit performance.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) packaging?

A: Tape & Reel packaging is used for high-volume automated assembly lines. Cut Tape packaging is used for lower-volume or manual assembly processes. Both formats contain the same component with identical specifications.

Q: Are there any compliance or environmental differences between these parts?

A: No. All three parts are ROHS3 compliant, REACH unaffected, and have identical moisture sensitivity levels (MSL 1 - Unlimited) and operating temperature ranges (-55°C to 85°C).

Q: Which substitute part should I select if inventory is a concern?

A: V275LT4P has the highest current inventory (31246 units), followed by V275LS4P (1301 units). Both are functionally equivalent to V275LU4P and available for immediate sourcing.

Q: Do these parts require any special handling or storage considerations?

A: All parts have MSL 1 (Unlimited) moisture sensitivity, indicating no special moisture control requirements during storage or handling.

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