Littelfuse P2353AA TVS Thyristor Equivalent & Substitute Parts

Part Overview

The Littelfuse P2353AA is a 200V off-state, 150A peak pulse transient voltage suppressor thyristor in a 3-SIP TO-220 modified package. This component is classified as obsolete, which necessitates identification of active equivalent parts to maintain design continuity and ensure supply chain availability. The P2353AA operates within the SIDACtor® series and provides transient voltage suppression across three independent elements.

Substiute Parts

P2353AA

Littelfuse Inc.In Stock: 2101P2353AA Datasheet

Current PartRFQ

P2353AAL

Littelfuse Inc.In Stock: 1633P2353AAL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P2353AA is determined by electrical and mechanical parameter equivalence. The following criteria establish direct substitutability:

• Voltage ratings: Breakover voltage (270V), off-state voltage (200V), and on-state voltage (8V) must match exactly
• Current specifications: Peak pulse current (8/20µs at 150A and 10/1000µs at 45A) and hold current (150mA) must be identical
• Element configuration: Three-element design required
• Capacitance range: 25pF to 35pF
• Package and mounting: 3-SIP through-hole configuration in TO-220 modified package

The P2353AAL meets all these criteria and qualifies as a direct electrical and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The P2353AAL is the direct substitute for the obsolete P2353AA. Both components share identical electrical and mechanical specifications across all critical parameters. The primary distinction is product status and regulatory compliance.

The P2353AAL carries active product status, ensuring continued availability and manufacturer support. Additionally, the P2353AAL meets ROHS3 compliance requirements, whereas the P2353AA is non-compliant. For new designs or redesigns of existing applications, the P2353AAL is the appropriate selection. For legacy system maintenance requiring exact electrical equivalence, the P2353AAL provides identical performance characteristics within a compliant product offering.

Frequently Asked Questions (FAQ)

Q: Can the P2353AAL be used as a direct replacement for the P2353AA in existing designs?

A: Yes. The P2353AAL is electrically and mechanically identical to the P2353AA. All voltage ratings, current specifications, element configuration, and package dimensions are equivalent. The component can be substituted without circuit modification.

Q: What is the difference between the P2353AA and P2353AAL?

A: The primary differences are product status and regulatory compliance. The P2353AA is obsolete and RoHS non-compliant. The P2353AAL is an active product that meets ROHS3 compliance standards. Electrical and mechanical specifications are identical.

Q: Are there any packaging differences between these parts?

A: No. Both the P2353AA and P2353AAL use the same 3-SIP TO-220 modified package with through-hole mounting. PCB layout and assembly procedures remain unchanged.

Q: Why should I transition from the P2353AA to the P2353AAL?

A: The P2353AA is obsolete, which creates supply chain risk. The P2353AAL is an active product with ongoing manufacturer support and availability. Additionally, the P2353AAL meets current RoHS3 compliance requirements, which may be necessary for regulatory or procurement standards.

Q: Are the electrical performance characteristics identical?

A: Yes. Breakover voltage, off-state voltage, on-state voltage, peak pulse current ratings, hold current, and capacitance specifications are identical between the two parts. Performance in transient voltage suppression applications is equivalent.