P3403UCTP Equivalent & Substitute Parts

Part Overview

The P3403UCTP is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc. as part of the SIDACtor® series. This component is designed for overvoltage protection applications requiring 300V off-state voltage rating with 400A peak pulse current capability in a 6-SMD gull wing surface mount package. The P3403UCTP is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Substiute Parts

P3403UCTP

Littelfuse Inc.In Stock: 893P3403UCTP Datasheet

Current PartRFQ

P3403UCLTP

Littelfuse Inc.In Stock: 1111P3403UCLTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The P3403UCTP has one direct equivalent substitute: P3403UCLTP. This substitution is valid based on the following matching parameters:

• Voltage - Breakover: 400V (identical)
• Voltage - Off State: 300V (identical)
• Voltage - On State: 8V (identical)
• Current - Peak Pulse (8/20µs): 400A (identical)
• Current - Peak Pulse (10/1000µs): 100A (identical)
• Current - Hold (Ih): 150mA (identical)
• Number of Elements: 3 (identical)
• Capacitance: 45pF, 65pF (identical)
• Mounting Type: Surface Mount (identical)
• Package / Case: 6-SMD, Gull Wing (identical)
• Supplier Device Package: Modified MS-013 (identical)

The primary difference between these parts is product status and packaging format. The P3403UCTP is obsolete with tape packaging, while P3403UCLTP is active with tube packaging. Both parts maintain identical electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The P3403UCLTP is the direct substitute for the obsolete P3403UCTP. Selection of P3403UCLTP is supported by:

• Identical electrical performance across all voltage and current parameters
• Identical mechanical specifications and package configuration
• Active product status ensuring ongoing availability and supply chain continuity
• ROHS3 compliance, providing regulatory advantage over the non-compliant P3403UCTP
• Tube packaging format suitable for automated assembly processes

For applications currently using P3403UCTP, transition to P3403UCLTP requires no circuit redesign or board layout modification.

Frequently Asked Questions (FAQ)

Q: Can P3403UCLTP directly replace P3403UCTP in existing designs?

A: Yes. All electrical parameters, mechanical dimensions, and package specifications are identical. No circuit or layout changes are required.

Q: What is the difference between P3403UCTP and P3403UCLTP?

A: The primary differences are product status (obsolete vs. active), packaging format (tape vs. tube), and RoHS compliance (non-compliant vs. ROHS3 compliant). Electrical and mechanical specifications are identical.

Q: Why is P3403UCTP listed as obsolete?

A: Littelfuse Inc. has discontinued the P3403UCTP in favor of the P3403UCLTP, which offers improved regulatory compliance and active production support.

Q: Are there any compatibility concerns with the 6-SMD gull wing package?

A: No. Both parts use the identical 6-SMD gull wing package configuration with Modified MS-013 supplier device package designation. PCB footprints and assembly processes remain unchanged.

Q: Does the tube packaging of P3403UCLTP affect performance?

A: No. Packaging format does not affect electrical or mechanical performance. Tube packaging is standard for automated pick-and-place assembly operations.

Q: Is ROHS3 compliance a requirement for my application?

A: ROHS3 compliance is mandatory for products sold in the European Union and many other regulated markets. P3403UCLTP meets this requirement, while P3403UCTP does not.