V250LC4 Equivalent & Substitute Parts

Part Overview

The V250LC4 is a 390 V, 1.2 kA varistor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This component features a through-hole disc package (7mm) and is rated for 21 J energy dissipation. The V250LC4 is currently classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations.

Substiute Parts

V250LC4

Littelfuse Inc.In Stock: 1120V250LC4 Datasheet

Current PartRFQ

V250LC4P

Littelfuse Inc.In Stock: 1000V250LC4P Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V250LC4 is determined by strict equivalence across the following critical parameters:

• Maximum AC Volts: 250 V
• Maximum DC Volts: 330 V
• Varistor Voltage (Typical): 390 V
• Current - Surge: 1.2 kA
• Energy Dissipation: 21 J
• Number of Circuits: 1
• Mounting Type: Through Hole
• Package / Case: Disc 7mm
• Operating Temperature Range: -55°C to 85°C

The V250LC4P qualifies as a direct substitute, maintaining identical electrical specifications and mechanical form factor while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

The V250LC4P is the qualified substitute for the obsolete V250LC4. Both components maintain identical electrical performance across all critical parameters: 250 V AC maximum, 330 V DC maximum, 390 V typical varistor voltage, and 1.2 kA surge current capacity. The mechanical form factor and through-hole mounting configuration are identical, ensuring direct board-level compatibility.

The primary advantage of V250LC4P is its active product status, ensuring continued availability and manufacturing support. Both parts are ROHS3 compliant and carry MSL 1 moisture sensitivity classification, meeting equivalent environmental and regulatory requirements.

The capacitance specification differs slightly (100 pF vs. 90 pF @ 1 MHz), which remains within acceptable tolerance for transient voltage suppression applications where capacitive effects are secondary to voltage clamping performance.

Frequently Asked Questions (FAQ)

Q: Can V250LC4P be used as a direct replacement for V250LC4 in existing designs?

A: Yes. The V250LC4P maintains identical electrical specifications (250 V AC, 330 V DC, 390 V varistor voltage, 1.2 kA surge current) and mechanical packaging (through-hole disc 7mm). No circuit modifications are required.

Q: What is the significance of the capacitance difference between V250LC4 and V250LC4P?

A: The capacitance values (100 pF vs. 90 pF @ 1 MHz) represent a minor variation within normal manufacturing tolerance. This difference does not affect the primary function of transient voltage suppression and is not a limiting factor for substitution.

Q: Why is the V250LC4 classified as obsolete?

A: Obsolete status indicates the part is no longer in active production. The V250LC4P provides equivalent functionality with active manufacturing support and improved supply chain availability.

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

A: Both V250LC4 and V250LC4P are ROHS3 compliant and carry identical moisture sensitivity classification (MSL 1). No compliance gaps exist between the two parts.

Q: What packaging formats are available for these varistors?

A: The V250LC4 is supplied in tape and reel format, while V250LC4P is available in bulk packaging. Both maintain the same through-hole disc 7mm form factor for PCB assembly.