V300LS10 Equivalent & Substitute Parts

Part Overview

The V300LS10 is a 470 V, 2.5 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 production and maintenance requirements. Substitute parts maintain identical electrical and mechanical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	470 V
Current - Surge	2.5 kA
Maximum AC Volts	300 V
Maximum DC Volts	405 V
Energy	46 J
Operating Temperature Range	-55°C to 85°C
Mounting Type	Through Hole
Package / Case	Disc 10mm
Capacitance @ 1 MHz	180 pF
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

All substitute parts for the V300LS10 maintain identical electrical performance parameters: 470 V typical varistor voltage, 2.5 kA surge current, 46 J energy rating, and -55°C to 85°C operating temperature range. Substitution is determined by the following criteria:

Varistor voltage range (423 V minimum to 517 V maximum)
Surge current capacity (2.5 kA)
Through-hole disc 10mm package configuration
ROHS3 compliance and MSL 1 rating

Substitute parts differ only in series designation (LS, LT, LU) and packaging format (Cut Tape or Tape & Reel). These variations do not affect electrical or mechanical compatibility in circuit applications.

Parameter Comparison

Part Number	Series	Packaging	Product Status	Varistor Voltage (Typ)	Surge Current	Energy	Operating Temp	Inventory
V300LS10	LS	Bulk	Obsolete	470 V	2.5 kA	46 J	-55°C to 85°C	890 Pcs
V300LS10P	LS	Cut Tape (CT)	Active	470 V	2.5 kA	46 J	-55°C to 85°C	1286 Pcs
V300LS10PX2855	LS	Tape & Reel (TR)	Active	470 V	2.5 kA	46 J	-55°C to 85°C	789 Pcs
V300LT10P	LT	Tape & Reel (TR)	Active	470 V	2.5 kA	46 J	-55°C to 85°C	873 Pcs
V300LT10PX2855	LT	Tape & Reel (TR)	Active	470 V	2.5 kA	46 J	-55°C to 85°C	764 Pcs
V300LU10P	LU	Tape & Reel (TR)	Active	470 V	2.5 kA	46 J	-55°C to 85°C	756 Pcs
V300LU10PX2855	LU	Tape & Reel (TR)	Active	470 V	2.5 kA	46 J	-55°C to 85°C	1095 Pcs

Engineering Selection Recommendations

For applications currently using the obsolete V300LS10, direct substitution is supported by all listed alternatives. Selection should prioritize active product status parts to ensure long-term supply continuity.

V300LS10P offers the highest inventory availability (1286 Pcs) in Cut Tape packaging, suitable for manual assembly and low-volume production. For automated assembly processes requiring Tape & Reel format, V300LU10PX2855 provides the largest stock position (1095 Pcs) with active product status.

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards. Series designation (LS, LT, LU) does not affect electrical performance or circuit compatibility.

Frequently Asked Questions (FAQ)

Q: Can V300LS10 be directly replaced with V300LS10P? A: Yes. V300LS10P is a direct electrical and mechanical equivalent with identical varistor voltage (470 V), surge current (2.5 kA), and package configuration (Disc 10mm). The difference is packaging format (Cut Tape vs. bulk) and active product status.

Q: What is the difference between LS, LT, and LU series designations? A: Series designation indicates internal design variants within the Littelfuse varistor product line. All three series maintain identical electrical specifications for this voltage and current rating, making them functionally interchangeable in circuit applications.

Q: Which packaging format should be selected for production? A: Packaging selection depends on assembly method. Cut Tape (CT) format suits manual or semi-automated assembly. Tape & Reel (TR) format is optimized for high-speed automated pick-and-place equipment. Electrical performance is identical across all packaging options.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, meeting current regulatory and manufacturing requirements.

Q: Can substitute parts be mixed in the same production batch? A: Yes. All substitute parts meet identical electrical and mechanical specifications, allowing interchangeable use within the same circuit design and production process.

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