V250LS10 Equivalent & Substitute Parts

Part Overview

The V250LS10 is a 390 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. The substitute parts listed maintain identical electrical and mechanical specifications while offering active product status and improved availability.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	390 V
Current - Surge	2.5 kA
Maximum AC Volts	250 V
Maximum DC Volts	330 V
Energy	40 J
Operating Temperature Range	-55°C to 85°C
Package / Case	Disc 10mm
Mounting Type	Through Hole
Number of Circuits	1
Capacitance @ 1 MHz	220 pF

Substitute Part Grouping Explanation

All substitute parts for the V250LS10 are parametric equivalents manufactured by Littelfuse Inc. and maintain identical electrical performance specifications. Substitution is determined by the following criteria:

Varistor voltage range: 351 V (Min) to 429 V (Max), with 390 V typical
Surge current capacity: 2.5 kA
Maximum AC/DC voltage ratings: 250 V AC / 330 V DC
Energy dissipation: 40 J
Package form factor: Disc 10mm through-hole
Operating temperature: -55°C to 85°C
Capacitance: 220 pF @ 1 MHz

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

Parameter Comparison

Part Number	Series	Packaging	Product Status	Varistor Voltage (Typ)	Surge Current	Max AC Volts	Max DC Volts	Energy	Inventory (Pcs)
V250LS10	LS	Bulk	Obsolete	390 V	2.5 kA	250 V	330 V	40 J	1102
V250LS10P	LS	Cut Tape (CT)	Active	390 V	2.5 kA	250 V	330 V	40 J	1235
V250LS10PX2855	LS	Tape & Reel (TR)	Active	390 V	2.5 kA	250 V	330 V	40 J	751
V250LT10P	LT	Cut Tape (CT)	Active	390 V	2.5 kA	250 V	330 V	40 J	1753
V250LT10PX2855	LT	Tape & Reel (TR)	Active	390 V	2.5 kA	250 V	330 V	40 J	777
V250LU10P	LU	Tape & Reel (TR)	Active	390 V	2.5 kA	250 V	330 V	40 J	1039
V250LU10PX2855	LU	Tape & Reel (TR)	Active	390 V	2.5 kA	250 V	330 V	40 J	1094

Engineering Selection Recommendations

All substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited) and carry EAR99 ECCN classification. The selection between substitute options depends on procurement and assembly requirements:

For manual assembly or low-volume applications, V250LS10P or V250LT10P in Cut Tape packaging provide direct component access. For automated assembly processes, Tape & Reel variants (V250LS10PX2855, V250LT10PX2855, V250LU10P, V250LU10PX2855) are appropriate. All substitute parts maintain active product status, ensuring long-term availability and supply chain continuity compared to the obsolete V250LS10.

Frequently Asked Questions (FAQ)

Q: Can V250LS10 be directly replaced with any of the listed substitutes? A: Yes. All listed parts are parametric equivalents with identical electrical specifications (390 V typical varistor voltage, 2.5 kA surge current, 40 J energy) and the same Disc 10mm through-hole package form factor. Substitution is electrically and mechanically compatible.

Q: What is the difference between LS, LT, and LU series designations? A: Series designation represents internal design variants within Littelfuse's varistor product line. All three series maintain identical electrical performance for this voltage and current rating. Selection between series is based on availability and supply chain preference.

Q: How do packaging formats (Cut Tape vs. Tape & Reel) affect component selection? A: Packaging format affects handling and assembly methodology only. Cut Tape (CT) packaging is suitable for manual or semi-automated assembly. Tape & Reel (TR) packaging with X2855 designation is optimized for high-speed automated pick-and-place assembly. Electrical performance is identical across all packaging options.

Q: Are all substitutes ROHS3 compliant? A: Yes. All substitute parts carry ROHS3 compliance certification with MSL rating of 1 (Unlimited moisture sensitivity level), meeting environmental and regulatory requirements equivalent to the original V250LS10.

Q: Which substitute offers the best availability? A: V250LT10P offers the highest current inventory at 1753 pieces. V250LS10P and V250LU10PX2855 provide secondary availability options with 1235 and 1094 pieces respectively.

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