Littelfuse P2703AB Equivalent & Substitute Parts

Part Overview

The Littelfuse P2703AB is a 230V off-state transient voltage suppressor (TVS) thyristor in a 3-SIP package, rated for 250A peak pulse current (8/20µs). This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The P2703AB belongs to the SIDACtor® series and is designed for overvoltage protection applications requiring high current handling capability in a compact through-hole form factor.

Substiute Parts

P2703AB

Littelfuse Inc.In Stock: 982P2703AB Datasheet

Current PartRFQ

P2703ABL

Littelfuse Inc.In Stock: 1860P2703ABL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The P2703ABL qualifies as a direct substitute for the P2703AB based on electrical and mechanical parameter equivalence. Substitution is valid when the following criteria are met:

• Identical voltage ratings: Breakover (300V), Off-State (230V), and On-State (8V)
• Identical current specifications: Peak Pulse (8/20µs) at 250A and (10/1000µs) at 80A
• Identical hold current (Ih) of 150mA
• Identical element count (3 elements)
• Identical capacitance values (50pF, 75pF)
• Identical package and mounting configuration (3-SIP, TO-220 Modified, Through Hole)

The P2703ABL meets all these criteria, making it a functionally equivalent replacement.

Parameter Comparison

Engineering Selection Recommendations

The P2703ABL is the direct equivalent for the obsolete P2703AB. Selection of the P2703ABL is based on:

• Complete electrical parameter equivalence across all voltage and current ratings
• Identical mechanical and thermal characteristics
• Active product status ensuring ongoing availability and supply chain support
• ROHS3 compliance, providing regulatory alignment for new designs and manufacturing environments
• Bulk packaging option supporting production requirements

No alternative part numbers are required for this substitution.

Frequently Asked Questions (FAQ)

Q: Can the P2703ABL be used as a direct replacement for the P2703AB in existing designs?

A: Yes. The P2703ABL is electrically and mechanically identical to the P2703AB across all specified parameters, including voltage ratings, current handling, element count, and package configuration.

Q: What is the primary difference between the P2703AB and P2703ABL?

A: The P2703ABL is the active production equivalent. The main differences are product status (Active vs. Obsolete) and RoHS compliance (ROHS3 Compliant vs. Non-compliant). Electrical and mechanical specifications are identical.

Q: Are there any package or mounting differences?

A: No. Both parts use the 3-SIP package in TO-220 Modified configuration with through-hole mounting. PCB layout and thermal management considerations remain unchanged.

Q: Is the P2703ABL suitable for new product designs?

A: Yes. The P2703ABL is the recommended part for new designs requiring 230V off-state TVS thyristor protection with 250A peak pulse current capability.

Q: What is the inventory status of the P2703ABL?

A: The P2703ABL has 1850 pieces in stock as new original inventory, providing adequate supply for production requirements.