P3406UBTP Equivalent & Substitute Parts

Part Overview

The P3406UBTP is a 300V off-state, 250A peak pulse TVS thyristor from Littelfuse Inc.'s SIDACtor® series, designed for transient voltage suppression in 6-SMD gull wing surface mount packaging. This part is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The substitute part maintains identical electrical performance and mechanical compatibility while offering improved product status and compliance certifications.

Substiute Parts

P3406UBTP

Littelfuse Inc.In Stock: 963P3406UBTP Datasheet

Current PartRFQ

P3406UBLTP

Littelfuse Inc.In Stock: 1011P3406UBLTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3406UBTP with the P3406UBLTP is based on strict equivalence across all critical electrical and mechanical parameters:

Electrical Equivalence: Both parts share identical voltage ratings (400V breakover, 300V off-state, 8V on-state), peak pulse current specifications (250A at 8/20µs, 80A at 10/1000µs), hold current (150mA), and capacitance values (20pF, 30pF).

Mechanical Compatibility: Both parts use identical 6-SMD gull wing surface mount packaging with Modified MS-013 supplier device package designation, ensuring direct PCB footprint compatibility.

Packaging Difference: The primary distinction is packaging format—P3406UBTP ships in standard packaging while P3406UBLTP is supplied in tube packaging. This difference does not affect electrical or mechanical performance.

Compliance Enhancement: P3406UBLTP offers improved product status (Active vs. Obsolete) and ROHS3 compliance certification, making it the preferred selection for new designs and ongoing procurement.

Parameter Comparison

Engineering Selection Recommendations

For New Designs: P3406UBLTP is the appropriate selection. It maintains full electrical and mechanical equivalence to P3406UBTP while offering active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory alignment.

For Existing Designs Using P3406UBTP: Direct substitution with P3406UBLTP is permissible without circuit modification. All electrical parameters, package dimensions, and pin configurations are identical. The tube packaging format of P3406UBLTP does not affect component performance or PCB assembly compatibility.

Compliance Considerations: P3406UBLTP's ROHS3 compliance and REACH unaffected status provide regulatory advantages for applications subject to environmental directives. P3406UBTP's non-compliant status may present procurement restrictions in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can P3406UBLTP be used as a direct replacement for P3406UBTP in existing assemblies?

A: Yes. All electrical parameters, voltage ratings, current specifications, and mechanical dimensions are identical. No circuit redesign is required.

Q: What is the difference between the two part numbers?

A: The primary difference is packaging format and product status. P3406UBLTP is supplied in tube packaging and maintains active product status with ROHS3 compliance, while P3406UBTP is obsolete and non-compliant.

Q: Does the tube packaging of P3406UBLTP affect PCB assembly?

A: No. Tube packaging is a supply format only and does not affect component electrical performance, footprint, or assembly compatibility.

Q: Are the capacitance values identical between both parts?

A: Yes. Both parts specify 20pF and 30pF capacitance values.

Q: What is the MSL rating for both parts?

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

Q: Why is P3406UBTP listed as obsolete?

A: Obsolete status indicates the part is no longer in active production. P3406UBLTP represents the current active equivalent from Littelfuse Inc.