V250LT20AP Equivalent & Substitute Parts

Part Overview

The V250LT20AP is a 390 V, 4.5 kA Transient Voltage Suppressor (TVS) varistor manufactured by Littelfuse Inc. in the LT series. This through-hole disc component (14mm) is designed for transient voltage protection applications requiring high surge current capacity and energy absorption. The part is Active status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when inventory constraints, supply chain disruptions, or design flexibility requirements necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

V250LT20AP

Littelfuse Inc.In Stock: 3655V250LT20AP Datasheet

Current PartRFQ

V250LS20AP

Littelfuse Inc.In Stock: 10453V250LS20AP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The V250LS20AP qualifies as a parametric equivalent to the V250LT20AP based on the following substitution criteria:

Electrical Parameters (Identical):

• Maximum AC Voltage: 250 V
• Maximum DC Voltage: 330 V
• Varistor Voltage (Typ): 390 V with identical range (351–429 V)
• Surge Current: 4.5 kA
• Energy Absorption: 72 J
• Capacitance @ 1 MHz: 500 pF
• Operating Temperature Range: −55 to +85°C

Mechanical Parameters (Identical):

• Mounting Type: Through Hole
• Package / Case: Disc 14mm
• Packaging: Cut Tape (CT)

Compliance & Regulatory (Identical):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected
• ECCN: EAR99
• HTSUS: 8533.40.4000

The only difference is the series designation (LT vs. LS), which does not affect electrical performance or mechanical compatibility. Both parts are manufactured by Littelfuse Inc. and maintain Active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the V250LT20AP and V250LS20AP are Active products with identical electrical specifications, mechanical form factors, and regulatory compliance profiles. Selection between these parts should be based on:

Availability: The V250LS20AP currently maintains higher inventory (10,349 pcs) compared to the V250LT20AP (3,600 pcs), making it suitable for high-volume procurement or extended lead-time mitigation.

Compliance: Both parts satisfy ROHS3 compliance requirements and carry REACH unaffected status, ensuring regulatory compatibility across EU and international markets.

Supply Chain Continuity: The V250LS20AP serves as a direct functional replacement when V250LT20AP supply is constrained, with no design modifications required.

Series Designation: The LT and LS series designations reflect internal Littelfuse product line organization and do not impact circuit performance or interchangeability.

Frequently Asked Questions (FAQ)

Q: Can V250LS20AP be used as a direct replacement for V250LT20AP in existing designs?

A: Yes. All electrical parameters, mechanical dimensions, mounting type, and regulatory certifications are identical. No circuit modifications or PCB layout changes are required.

Q: Are there any performance differences between the LT and LS series?

A: No. The series designation is a product line classification within Littelfuse Inc. and does not affect electrical performance, surge current capacity, energy absorption, or operating temperature range.

Q: Do both parts have the same package footprint?

A: Yes. Both use a through-hole Disc 14mm package with identical mechanical specifications, ensuring direct PCB compatibility.

Q: What is the moisture sensitivity level for both parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.

Q: Are both parts RoHS3 compliant?

A: Yes. Both V250LT20AP and V250LS20AP are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Can these parts be used interchangeably in high-volume production?

A: Yes. Identical electrical and mechanical specifications allow interchangeable use in production environments without design or process changes.