P1803AB Equivalent & Substitute Parts

Part Overview

The P1803AB is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc. under the SIDACtor® series. This component is designed for overvoltage protection applications requiring 150V off-state voltage rating with 250A peak pulse current capability in a 3-SIP through-hole package configuration. The P1803AB is classified as obsolete, making identification of equivalent substitute parts essential for ongoing system support and component procurement.

Substiute Parts

P1803AB

Littelfuse Inc.In Stock: 1182P1803AB Datasheet

Current PartRFQ

P1803ABL

Littelfuse Inc.In Stock: 5506P1803ABL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1803AB is determined by strict equivalence across electrical and mechanical parameters. The primary substitute, P1803ABL, maintains identical electrical specifications including breakover voltage (210V), off-state voltage (150V), on-state voltage (8V), peak pulse current ratings (250A at 8/20µs and 80A at 10/1000µs), hold current (150mA), element count (3), capacitance values (55pF, 85pF), and mechanical configuration (3-SIP through-hole package in TO-220 Modified form factor).

The substitution is valid based on these matching parameters:

• Identical voltage ratings across all operating states
• Identical peak pulse current specifications
• Identical hold current threshold
• Identical package and mounting configuration
• Identical capacitance characteristics
• Same manufacturer (Littelfuse Inc.) and series (SIDACtor®)

Parameter Comparison

Engineering Selection Recommendations

The P1803ABL serves as the direct active substitute for the obsolete P1803AB. Both components are manufactured by Littelfuse Inc. and maintain identical electrical and mechanical specifications across all critical parameters. The P1803ABL is currently in active production status with improved regulatory compliance, specifically achieving ROHS3 compliance compared to the non-compliant status of the P1803AB. Both components share the same ECCN and HTSUS classifications, confirming their functional equivalence for procurement and system integration purposes.

Frequently Asked Questions (FAQ)

Q: Can P1803ABL be used as a direct replacement for P1803AB in existing designs?

A: Yes. The P1803ABL maintains identical electrical specifications (voltage ratings, current ratings, hold current) and mechanical configuration (3-SIP through-hole package, TO-220 Modified form factor) as the P1803AB. No circuit modifications are required.

Q: What is the primary difference between P1803AB and P1803ABL?

A: The P1803ABL is the active production equivalent of the obsolete P1803AB. The substitute offers improved regulatory compliance (ROHS3 compliant versus non-compliant) while maintaining all electrical and mechanical parameters.

Q: Are there packaging differences between these parts?

A: The P1803AB is supplied in standard packaging, while the P1803ABL is supplied in bulk packaging. Both use identical 3-SIP through-hole package configuration and TO-220 Modified form factor. Packaging format does not affect electrical or mechanical compatibility.

Q: What parameters must remain identical for substitution validity?

A: Substitution is valid when the following parameters match: breakover voltage (210V), off-state voltage (150V), on-state voltage (8V), peak pulse current ratings (250A at 8/20µs and 80A at 10/1000µs), hold current (150mA), element count (3), capacitance values (55pF, 85pF), and package configuration (3-SIP through-hole, TO-220 Modified).

Q: Is the P1803ABL suitable for new designs?

A: Yes. The P1803ABL is in active production status and carries ROHS3 compliance certification, making it appropriate for new product development and long-term supply chain planning.