P3403UBTP Equivalent & Substitute Parts

Part Overview

The P3403UBTP is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc. under the SIDACtor® series. This component is designed for overvoltage protection applications requiring 300V off-state voltage rating with 250A peak pulse current capability in a 6-SMD gull wing surface mount package. The P3403UBTP is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design considerations.

Substiute Parts

P3403UBTP

Littelfuse Inc.In Stock: 943P3403UBTP Datasheet

Current PartRFQ

P3403UBLTP

Littelfuse Inc.In Stock: 824P3403UBLTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3403UBTP is determined by electrical and mechanical parameter equivalence. The critical parameters defining substitutability are:

• Voltage ratings (breakover, off-state, and on-state)
• Peak pulse current capabilities (both 8/20µs and 10/1000µs waveforms)
• Hold current specification
• Number of internal elements
• Capacitance range
• Physical package configuration (6-SMD gull wing)
• Mounting type (surface mount)

The P3403UBLTP qualifies as a direct substitute based on identical electrical specifications across all voltage and current parameters, matching element count, capacitance values, and package geometry. The primary distinction between these parts is packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The P3403UBLTP is the direct functional equivalent for the obsolete P3403UBTP. Both components share identical electrical specifications and physical packaging, ensuring pin-for-pin and functional compatibility in circuit applications.

Selection between these parts should be based on the following factors:

• Product Status: The P3403UBTP is obsolete. The P3403UBLTP maintains active product status with ongoing manufacturer support and availability.
• Regulatory Compliance: The P3403UBLTP meets ROHS3 compliance requirements, whereas the P3403UBTP is non-compliant. For applications subject to RoHS regulations, the P3403UBLTP is the required choice.
• Packaging Format: The P3403UBTP is supplied in standard packaging, while the P3403UBLTP is supplied in tube packaging. Tube packaging may affect procurement workflows and handling procedures.
• Supply Chain Continuity: The P3403UBLTP offers superior long-term availability and supply chain stability due to its active status.

Frequently Asked Questions (FAQ)

Q: Can the P3403UBLTP be used as a direct replacement for the P3403UBTP in existing designs?

A: Yes. The P3403UBLTP is electrically and mechanically identical to the P3403UBTP across all specified parameters. No circuit modifications are required for substitution.

Q: What is the difference between the P3403UBTP and P3403UBLTP?

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

Q: Are there any compatibility concerns when switching from P3403UBTP to P3403UBLTP?

A: No compatibility concerns exist. Both parts use the same 6-SMD gull wing package configuration and Modified MS-013 supplier device package. PCB footprints and assembly processes remain unchanged.

Q: Why is the P3403UBTP classified as obsolete?

A: The P3403UBTP has been discontinued by Littelfuse Inc. The P3403UBLTP represents the current active product offering with equivalent functionality.

Q: Does the tube packaging of the P3403UBLTP affect performance?

A: No. Packaging format does not affect electrical performance or functional characteristics. Tube packaging is a supply and handling format only.

Q: Is the P3403UBLTP suitable for new designs?

A: Yes. The P3403UBLTP is the recommended choice for new designs requiring 300V off-state TVS thyristor protection with 250A peak pulse current capability. Its active status and ROHS3 compliance support long-term design viability.