P1553AB Equivalent & Substitute Parts

Part Overview

The P1553AB is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc. under the SIDACtor® series. This component is designed for overvoltage protection applications requiring 130V off-state voltage rating with 250A peak pulse current capability in a 3-SIP through-hole package configuration. The P1553AB is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

P1553AB

Littelfuse Inc.In Stock: 864P1553AB Datasheet

Current PartRFQ

P1553ABL

Littelfuse Inc.In Stock: 5285P1553ABL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1553AB is determined by electrical and mechanical parameter equivalence across the following criteria:

• 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 (250A) and 10/1000µs (80A) must be identical
• Hold current (Ih) requirement of 150mA must be maintained
• Element count: 3-element configuration required
• Capacitance values: 60pF and 95pF specifications must be preserved
• Physical form factor: 3-SIP through-hole package with TO-220 Modified supplier package designation

The P1553ABL meets all these criteria and qualifies as a direct electrical and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The P1553ABL is the direct substitute for the obsolete P1553AB. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications across all critical parameters including voltage ratings, current handling, element configuration, and package form factor.

The primary distinction between these parts is product lifecycle status and regulatory compliance. The P1553AB is obsolete and RoHS non-compliant, while the P1553ABL maintains active product status and achieves ROHS3 compliance. For new designs and ongoing system support, the P1553ABL is the appropriate selection. Both components maintain identical moisture sensitivity classification (MSL 1) and export control designation (EAR99).

Frequently Asked Questions (FAQ)

Q: Can P1553ABL be used as a direct replacement for P1553AB in existing designs?

A: Yes. The P1553ABL is electrically and mechanically identical to the P1553AB across all specified parameters. The components share the same voltage ratings (180V breakover, 130V off-state, 8V on-state), current specifications (250A at 8/20µs, 80A at 10/1000µs), hold current (150mA), element count (3), capacitance values (60pF, 95pF), and 3-SIP through-hole package configuration. Direct substitution is supported without circuit modification.

Q: What is the difference between P1553AB and P1553ABL?

A: The electrical and mechanical specifications are identical. The differences are product lifecycle status and regulatory compliance. The P1553AB is obsolete and RoHS non-compliant. The P1553ABL is an active product that meets ROHS3 compliance requirements. Both maintain MSL 1 moisture sensitivity classification and EAR99 export control designation.

Q: Why is the P1553AB classified as obsolete?

A: The P1553AB has reached end-of-life status in the manufacturer's product portfolio. The P1553ABL serves as the active equivalent and is recommended for all new applications and ongoing system support.

Q: Are there any package or pinout differences between these parts?

A: No. Both components use the 3-SIP through-hole package with TO-220 Modified supplier package designation. Pinout and physical form factor are identical, enabling direct board-level substitution.

Q: What is the significance of ROHS3 compliance on the P1553ABL?

A: ROHS3 compliance indicates the P1553ABL meets current Restriction of Hazardous Substances regulations. This is relevant for applications subject to environmental and regulatory requirements in markets enforcing RoHS directives. The P1553AB, being RoHS non-compliant, may face restrictions in certain jurisdictions and supply chain requirements.