Littelfuse P1553AA Equivalent & Substitute Parts

Part Overview

The Littelfuse P1553AA is a 130V 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 P1553AA carries an obsolete product status. Identifying equivalent and 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

P1553AA

LittelfuseIn Stock: 1110P1553AA Datasheet

Current PartRFQ

P1553AAL

Littelfuse Inc.In Stock: 5110P1553AAL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1553AA is determined by strict equivalence across the following electrical and mechanical parameters:

• Voltage ratings: Breakover voltage (180V), off-state voltage (130V), and on-state voltage (8V) must match exactly
• Current specifications: Peak pulse current at 8/20µs (150A) and 10/1000µs (45A) must be identical
• Hold current (Ih): 150 mA requirement must be maintained
• Element configuration: Three-element topology (3-SIP) is mandatory
• Capacitance values: 30pF and 45pF specifications must be preserved
• Package and mounting: 3-SIP through-hole configuration in TO-220 modified package is required

The P1553AAL meets all these criteria and qualifies as a direct substitute for the obsolete P1553AA.

Parameter Comparison

Engineering Selection Recommendations

The P1553AAL is the qualified substitute for the obsolete P1553AA. Both components are manufactured by Littelfuse Inc. and belong to the SIDACtor® series.

The P1553AAL offers the following advantages for new designs and production continuity:

• Active product status ensures ongoing availability and supply chain support
• ROHS3 compliance meets current environmental and regulatory requirements
• REACH unaffected status confirms regulatory alignment
• Identical electrical and mechanical specifications guarantee direct pin-for-pin and functional compatibility
• Bulk packaging option supports production scalability

The P1553AA, while currently in stock (1083 pcs), carries obsolete status and non-compliant RoHS classification. The P1553AAL (5100 pcs in stock) is the recommended selection for all new applications and ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can the P1553AAL be used as a direct replacement for the P1553AA in existing designs?

A: Yes. The P1553AAL is electrically and mechanically identical to the P1553AA across all specified parameters, including voltage ratings, current handling, element configuration, and package type. No circuit modifications are required.

Q: What is the difference between the P1553AA and P1553AAL?

A: The primary differences are product status and regulatory compliance. The P1553AA is obsolete and RoHS non-compliant. The P1553AAL is an active product with ROHS3 compliance and REACH unaffected status, making it suitable for current manufacturing standards.

Q: Are there any packaging differences between these parts?

A: The P1553AA is supplied in standard packaging, while the P1553AAL is available in bulk packaging. Both use the identical 3-SIP TO-220 modified package configuration for through-hole mounting.

Q: What parameters must match for a valid substitution?

A: All electrical parameters must be identical: 180V breakover voltage, 130V off-state voltage, 8V on-state voltage, 150A peak pulse current (8/20µs), 45A peak pulse current (10/1000µs), and 150mA hold current. The three-element configuration, capacitance values (30pF and 45pF), and 3-SIP through-hole package are also mandatory.

Q: Is the P1553AAL suitable for new product designs?

A: Yes. The P1553AAL is an active product with current regulatory compliance (ROHS3, REACH unaffected). It is the recommended choice for all new designs requiring 130V off-state, 150A peak pulse TVS thyristor functionality in a 3-SIP package.