P3406UCTP Equivalent & Substitute Parts

Part Overview

The P3406UCTP is a 300V off-state, 400A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series. This component is designed for transient voltage suppression applications requiring high current handling in a compact 6-SMD gull wing package. The part is currently obsolete, making identification of suitable substitutes essential for ongoing system support and new design implementations.

Substiute Parts

P3406UCTP

Littelfuse Inc.In Stock: 833P3406UCTP Datasheet

Current PartRFQ

P3406UCLTP

LittelfuseIn Stock: 1122P3406UCLTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P3406UCTP is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications for:

• Voltage ratings (breakover, off-state, and on-state)
• Peak pulse current handling (both 8/20µs and 10/1000µs waveforms)
• Hold current threshold
• Element count and capacitance values
• Physical package configuration (6-SMD gull wing)
• Mounting type (surface mount)

The P3406UCLTP meets all these criteria as a direct electrical and mechanical equivalent, with the primary distinction being packaging format (tube versus unspecified) and product status (active versus obsolete).

Parameter Comparison

Engineering Selection Recommendations

The P3406UCLTP is a direct functional equivalent to the P3406UCTP with identical electrical performance and mechanical compatibility. Selection between these parts is determined by application requirements and regulatory compliance:

For applications requiring RoHS3 compliance, the P3406UCLTP is the appropriate selection. This part maintains active product status with Littelfuse, ensuring continued availability and supply chain stability.

For legacy systems or applications where RoHS compliance is not mandated, either part satisfies the electrical and mechanical requirements. However, the P3406UCTP's obsolete status may present sourcing challenges for future procurement.

Frequently Asked Questions (FAQ)

Q: Can P3406UCLTP be used as a direct replacement for P3406UCTP in existing designs?

A: Yes. The P3406UCLTP is electrically and mechanically identical to the P3406UCTP. All voltage ratings, current specifications, element count, capacitance values, and package configuration are equivalent. PCB layout and circuit design require no modification.

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

A: The primary differences are product status and RoHS compliance. The P3406UCTP is obsolete and RoHS non-compliant. The P3406UCLTP is active and ROHS3 compliant. Packaging format differs (tube for P3406UCLTP), but electrical and mechanical specifications are identical.

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 (Modified MS-013). Footprint, solder pad layout, and mounting requirements are the same.

Q: Which part should be selected for new designs?

A: The P3406UCLTP is recommended for new designs due to active product status and ROHS3 compliance, ensuring long-term availability and regulatory alignment.

Q: Is the capacitance specification critical for substitution?

A: Yes. Both parts specify identical capacitance values (25pF, 35pF). This parameter must match for proper circuit performance in transient suppression applications.