V250LT10 Equivalent & Substitute Parts

Part Overview

The V250LT10 is a 390 V, 2.5 kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Littelfuse offers multiple active alternatives within the same electrical and mechanical specifications, differing primarily in series designation and packaging format.

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
Package / Case	Disc 10mm
Mounting Type	Through Hole
Operating Temperature Range	-55°C to 85°C
Capacitance @ 1 MHz	220 pF
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the V250LT10 is based on electrical parameter equivalence and mechanical compatibility. All substitute parts maintain identical specifications across the following critical parameters:

Varistor voltage range (351 V minimum to 429 V maximum)
Surge current capacity (2.5 kA)
Energy rating (40 J)
Package form factor (Disc 10mm through-hole)
Operating temperature range (-55°C to 85°C)
Capacitance characteristics (220 pF @ 1 MHz)
Regulatory compliance (ROHS3, EAR99, HTSUS 8533.40.4000)

Substitute parts differ only in series designation (LT, LS, LU) and packaging format (Cut Tape or Tape & Reel). All substitute parts are active products with current manufacturing status, eliminating obsolescence risk.

Parameter Comparison

Part Number	Series	Packaging	Product Status	Varistor Voltage (Typ)	Surge Current	Energy	Inventory (Pcs)
V250LT10	LT	Disc 10mm	Obsolete	390 V	2.5 kA	40 J	1006
V250LT10P	LT	Cut Tape (CT)	Active	390 V	2.5 kA	40 J	1753
V250LS10P	LS	Cut Tape (CT)	Active	390 V	2.5 kA	40 J	1235
V250LS10PX2855	LS	Tape & Reel (TR)	Active	390 V	2.5 kA	40 J	751
V250LT10PX2855	LT	Tape & Reel (TR)	Active	390 V	2.5 kA	40 J	777
V250LU10P	LU	Tape & Reel (TR)	Active	390 V	2.5 kA	40 J	1039
V250LU10PX2855	LU	Tape & Reel (TR)	Active	390 V	2.5 kA	40 J	1094

Engineering Selection Recommendations

All listed substitute parts are direct electrical and mechanical equivalents to the V250LT10. Selection should be based on packaging and supply chain requirements:

For manual assembly or low-volume applications: V250LT10P (Cut Tape) or V250LS10P (Cut Tape) provide active alternatives with the same series or equivalent series designation.

For automated assembly or high-volume production: V250LT10PX2855, V250LS10PX2855, V250LU10P, or V250LU10PX2855 (all Tape & Reel format) are suitable for pick-and-place equipment integration.

For series continuity: V250LT10P maintains the original LT series designation while offering active product status.

All substitute parts maintain ROHS3 compliance and identical regulatory certifications (EAR99, HTSUS 8533.40.4000). Moisture sensitivity level remains unchanged at MSL 1 (Unlimited) across all alternatives.

Frequently Asked Questions (FAQ)

Q: Can V250LS10P or V250LU10P be used as direct replacements for V250LT10?

A: Yes. All substitute parts maintain identical electrical parameters (390 V typical varistor voltage, 2.5 kA surge current, 40 J energy) and mechanical specifications (Disc 10mm through-hole package). Series designation (LT, LS, LU) does not affect functional equivalence for this product category.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Cut Tape (CT) packaging is suitable for manual component handling and low-volume assembly. Tape & Reel (TR) packaging with X2855 designation is optimized for automated pick-and-place assembly equipment. Electrical and mechanical specifications are identical between packaging formats.

Q: Are all substitute parts currently in production?

A: Yes. All listed substitute parts have Active product status, ensuring continued availability and manufacturing support. The original V250LT10 is classified as Obsolete and should not be specified for new designs.

Q: Do substitute parts meet the same compliance requirements?

A: Yes. All substitute parts are ROHS3 compliant and carry identical regulatory classifications (EAR99, HTSUS 8533.40.4000). Moisture sensitivity level (MSL 1 - Unlimited) is consistent across all alternatives.

Q: Which substitute part offers the highest current inventory?

A: V250LU10PX2855 offers the highest inventory at 1,094 pieces, followed by V250LT10PX2855 at 777 pieces. For immediate availability, V250LT10P (1,753 pieces) in Cut Tape format is also well-stocked.

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