P1803AA Equivalent & Substitute Parts

Part Overview

The P1803AA is a 150V off-state, 150A 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 3-SIP through-hole package. The P1803AA is currently classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement.

Substiute Parts

P1803AA

Littelfuse Inc.In Stock: 1192P1803AA Datasheet

Current PartRFQ

P1803AAL

Littelfuse Inc.In Stock: 5365P1803AAL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1803AA is determined by electrical and mechanical parameter equivalence. The critical parameters for substitution are:

• Voltage ratings (breakover, off-state, and on-state)
• Current handling specifications (peak pulse at 8/20µs and 10/1000µs, hold current)
• Number of elements (3-element configuration)
• Capacitance values
• Package type (3-SIP) and mounting method (through-hole)

The P1803AAL is a direct substitute, maintaining identical electrical specifications and physical packaging while offering improved product status and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The P1803AAL is the direct equivalent for the obsolete P1803AA. Both components share identical electrical and mechanical specifications, ensuring functional compatibility in existing designs. The P1803AAL offers the advantage of active product status, ensuring continued availability and supply chain support.

The P1803AAL provides ROHS3 compliance, whereas the P1803AA is non-compliant. For applications subject to RoHS regulations or requiring compliance documentation, the P1803AAL is the appropriate selection. Both components maintain identical moisture sensitivity levels and are suitable for equivalent environmental conditions.

Frequently Asked Questions (FAQ)

Q: Can the P1803AAL directly replace the P1803AA in existing designs?

A: Yes. The P1803AAL maintains identical electrical specifications (voltage ratings, current handling, capacitance) and physical packaging (3-SIP through-hole). No circuit modifications are required.

Q: What is the primary reason to transition from P1803AA to P1803AAL?

A: The P1803AA is obsolete. The P1803AAL is an active product with ongoing manufacturer support and availability. Additionally, the P1803AAL is ROHS3 compliant, whereas the P1803AA is not.

Q: Are there any differences in mounting or PCB layout requirements?

A: No. Both components use identical 3-SIP through-hole packaging and mounting methods. PCB layouts designed for the P1803AA are directly compatible with the P1803AAL.

Q: What are the key electrical parameters that define substitution for this component?

A: Substitution is determined by matching voltage ratings (210V breakover, 150V off-state, 8V on-state), current specifications (150A peak pulse at 8/20µs, 45A at 10/1000µs, 150mA hold current), element count (3), and capacitance values (30pF, 40pF).

Q: Is the P1803AAL suitable for new designs?

A: Yes. The P1803AAL is an active product with full manufacturer support and compliance certifications, making it appropriate for both replacement and new design applications.