Littelfuse P3403AA Equivalent & Substitute Parts

Part Overview

The Littelfuse P3403AA is a 300V off-state, 150A peak pulse TVS thyristor in a 3-SIP TO-220 modified package, part of the SIDACtor® series. This component is designed for transient voltage suppression applications requiring high current handling capability across three elements.

The P3403AA is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this transient voltage suppression topology.

Substiute Parts

P3403AA

Littelfuse Inc.In Stock: 24519P3403AA Datasheet

Current PartRFQ

P3403AAL

Littelfuse Inc.In Stock: 5394P3403AAL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P3403AA is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage ratings: 400V breakover, 300V off-state, 8V on-state
• Current specifications: 150A peak pulse (8/20µs), 45A peak pulse (10/1000µs), 150mA hold current
• Element configuration: 3-element design
• Capacitance characteristics: 20pF and 30pF values
• Physical form factor: 3-SIP package in TO-220 modified configuration
• Through-hole mounting compatibility

The P3403AAL meets all these criteria and qualifies as a direct substitute for the obsolete P3403AA.

Parameter Comparison

Engineering Selection Recommendations

The P3403AAL is the direct substitute for the obsolete P3403AA. Both components share identical electrical performance and physical form factors across all specified parameters.

The P3403AAL offers the additional advantage of active product status, ensuring continued availability and supply chain support. The P3403AAL also carries ROHS3 compliance, whereas the P3403AA is RoHS non-compliant. For new designs or production transitions, the P3403AAL is the appropriate selection.

Both components maintain identical moisture sensitivity classification (MSL 1) and export control designations (EAR99), with no restrictions on substitution from a regulatory or compliance perspective.

Frequently Asked Questions (FAQ)

Q: Can the P3403AAL directly replace the P3403AA in existing designs?

A: Yes. The P3403AAL is electrically and mechanically identical to the P3403AA across all specified parameters, including voltage ratings, current handling, element configuration, capacitance values, and TO-220 modified 3-SIP package form factor. No circuit modifications are required.

Q: What is the primary reason to transition from P3403AA to P3403AAL?

A: The P3403AA is obsolete. The P3403AAL is an active product with confirmed supply availability. Additionally, the P3403AAL meets ROHS3 compliance requirements, whereas the P3403AA does not.

Q: Are there any differences in moisture sensitivity or handling requirements?

A: No. Both the P3403AA and P3403AAL carry identical MSL 1 (Unlimited) ratings, indicating no moisture sensitivity restrictions during storage or handling.

Q: Is the packaging format identical between these parts?

A: Yes. Both components use the 3-SIP package in TO-220 modified configuration with through-hole mounting. PCB layout and thermal management considerations remain unchanged.

Q: Are there any export or regulatory restrictions on using the P3403AAL as a substitute?

A: No. Both components carry identical ECCN (EAR99) and HTSUS (8541.30.0080) classifications. Substitution presents no additional export control or regulatory compliance concerns.