P1553UCTP Equivalent & Substitute Parts

Part Overview

The P1553UCTP is a 130V off-state, 400A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series. This component is designed for transient voltage suppression applications requiring high current handling in a compact 6-SMD gull wing package. The part is currently obsolete, making identification of compatible substitutes essential for ongoing system support and new design implementations.

Substiute Parts

P1553UCTP

Littelfuse Inc.In Stock: 1001P1553UCTP Datasheet

Current PartRFQ

P1553UCLTP

Littelfuse Inc.In Stock: 977P1553UCLTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1553UCTP is determined by electrical and mechanical parameter equivalence. The following parameters must remain constant for direct substitution:

• Voltage ratings (breakover, off-state, on-state)
• Peak pulse current specifications (8/20µs and 10/1000µs)
• Hold current (Ih)
• Number of elements
• Capacitance values
• Package type and mounting configuration

The P1553UCLTP meets all these criteria, differing only in packaging format (tube vs. unspecified original packaging) and product status (active vs. obsolete), with improved RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The P1553UCLTP is the direct electrical and mechanical equivalent of the P1553UCTP. Both components share identical voltage ratings, current specifications, element count, and package configuration. The primary distinction is product lifecycle status: P1553UCTP is obsolete while P1553UCLTP is active production.

For new designs and ongoing system support, P1553UCLTP is the appropriate selection. This part maintains full electrical compatibility while offering ROHS3 compliance, addressing regulatory requirements that may apply to modern manufacturing and end-use applications. Packaging format (tube) does not affect electrical performance or board-level integration.

Frequently Asked Questions (FAQ)

Q: Can P1553UCLTP directly replace P1553UCTP in existing designs? A: Yes. Both parts are electrically and mechanically identical across all specified parameters. The substitution is direct with no circuit modifications required.

Q: What is the significance of the packaging difference (tube vs. original)? A: Packaging format affects component handling, storage, and supply chain logistics but does not impact electrical performance or PCB assembly compatibility. Both formats accommodate the same 6-SMD gull wing package.

Q: Why is RoHS compliance different between the two parts? A: P1553UCTP predates current RoHS3 requirements and is marked as non-compliant. P1553UCLTP is manufactured to current standards and carries ROHS3 compliance certification, making it suitable for applications subject to environmental regulations.

Q: Are there any performance differences between these parts? A: No. All electrical parameters—voltage ratings, current handling, hold current, and capacitance—are identical. Performance in transient voltage suppression applications is equivalent.

Q: What is the inventory status for these parts? A: P1553UCTP has 963 pieces in stock (obsolete status). P1553UCLTP has 935 pieces in stock (active production). Availability of the active part ensures long-term supply continuity.