P3403ACMC Equivalent & Substitute Parts

Part Overview

The P3403ACMC 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 three-element configuration in a TO-220 modified package. The part is currently classified as obsolete, making identification of active equivalent parts essential for ongoing system support and new design implementations.

Substiute Parts

P3403ACMC

Littelfuse Inc.In Stock: 2267P3403ACMC Datasheet

Current PartRFQ

P3403ACMCL

LittelfuseIn Stock: 797P3403ACMCL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3403ACMC is determined by matching the following critical electrical and mechanical parameters:

• Voltage ratings: Breakover voltage of 400V, off-state voltage of 300V, and on-state voltage of 8V
• Current specifications: Peak pulse current of 400A (8/20µs) and 100A (10/1000µs), with hold current of 150mA
• Physical configuration: Three-element design (3-SIP) in TO-220 modified package
• Capacitance: 30pF

The P3403ACMCL meets all these criteria and is classified as a direct manufacturer equivalent with identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The P3403ACMCL is the direct functional equivalent for the obsolete P3403ACMC. Both parts share identical electrical specifications and mechanical packaging, ensuring pin-for-pin and functional compatibility in existing circuit designs.

The P3403ACMCL offers the additional advantage of active product status and ROHS3 compliance, making it suitable for new designs and applications requiring current regulatory adherence. The transition from the non-compliant P3403ACMC to the ROHS3-compliant P3403ACMCL presents no electrical or mechanical constraints.

Frequently Asked Questions (FAQ)

Q: Can the P3403ACMCL directly replace the P3403ACMC in existing designs?

A: Yes. The P3403ACMCL is electrically and mechanically identical to the P3403ACMC across all specified parameters, including voltage ratings, current ratings, element count, and package configuration. Direct substitution is supported without circuit modification.

Q: What is the difference between P3403ACMC and P3403ACMCL?

A: The primary differences are product status and regulatory compliance. The P3403ACMC is obsolete and RoHS non-compliant, while the P3403ACMCL is active and ROHS3 compliant. Electrical and mechanical specifications are identical.

Q: Are there packaging differences between these parts?

A: Both parts use the same 3-SIP package in TO-220 modified configuration with through-hole mounting. No package or footprint changes are required for substitution.

Q: Which part should be selected for new designs?

A: The P3403ACMCL should be selected for new designs due to its active status and ROHS3 compliance. The P3403ACMC is obsolete and should only be used for legacy system maintenance where existing inventory is available.