V250LU4P Equivalent & Substitute Parts

Part Overview

The V250LU4P is a 390 V varistor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This through-hole disc component (7mm) provides 1.2 kA surge current capacity with 21 J energy rating. The part is actively produced and ROHS3 compliant, making it suitable for modern electronic circuit protection. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to packaging availability, inventory constraints, or supply chain considerations.

Substiute Parts

V250LU4P

Littelfuse Inc.In Stock: 1189V250LU4P Datasheet

Current PartRFQ

V250LS4P

Littelfuse Inc.In Stock: 4970V250LS4P Datasheet

Parametric EquivalentRFQ

V250LT4P

Littelfuse Inc.In Stock: 7108V250LT4P Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the V250LU4P are qualified based on identical electrical and mechanical parameters. The substitution criteria are:

• Varistor voltage range: 351 V – 429 V (typical 390 V)
• Surge current capacity: 1.2 kA
• Energy rating: 21 J
• Mounting configuration: Through hole
• Physical package: Disc 7mm
• Operating temperature: -55°C to 85°C
• Capacitance: 90 pF @ 1 MHz
• Compliance: ROHS3, REACH Unaffected

The V250LU4P, V250LT4P, and V250LS4P are all members of the Littelfuse LU/LT/LS varistor series and meet these criteria. The primary difference between these parts is packaging format: V250LU4P is supplied in Tape & Reel (TR), while V250LT4P and V250LS4P are supplied in Cut Tape (CT). All three parts are electrically and mechanically interchangeable for circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—V250LU4P, V250LT4P, and V250LS4P—are electrically and mechanically equivalent for circuit protection applications. Selection between them is determined by packaging and supply requirements:

• V250LU4P (Tape & Reel): Suitable for high-volume automated assembly processes requiring reel-based component feeding.
• V250LT4P (Cut Tape): Suitable for manual assembly or lower-volume production runs using cut tape format.
• V250LS4P (Cut Tape): Suitable for manual assembly or lower-volume production runs using cut tape format.

All parts maintain ROHS3 compliance and REACH unaffected status, meeting modern regulatory requirements. Product status is active for all three variants, ensuring continued availability and manufacturing support.

Frequently Asked Questions (FAQ)

Q: Can V250LT4P or V250LS4P be used as direct replacements for V250LU4P in circuit design?

A: Yes. All three parts have identical electrical specifications (390 V varistor voltage, 1.2 kA surge current, 21 J energy) and mechanical configuration (through-hole, 7mm disc). The only difference is packaging format (tape & reel versus 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 supplies components on continuous reels suitable for automated pick-and-place assembly equipment. Cut Tape packaging supplies components in shorter tape segments suitable for manual assembly or lower-volume applications. Both formats contain the same component.

Q: Are all three parts ROHS3 compliant?

A: Yes. V250LU4P, V250LT4P, and V250LS4P are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: What is the operating temperature range for these varistors?

A: All three parts operate within -55°C to 85°C ambient temperature range, suitable for industrial and commercial applications.

Q: Can these parts be used interchangeably in existing PCB designs?

A: Yes, provided the PCB layout accommodates through-hole mounting and the 7mm disc package. No circuit modifications are required when substituting between V250LU4P, V250LT4P, and V250LS4P.