P1803UBTP Equivalent & Substitute Parts

Part Overview

The P1803UBTP is a 150V off-state TVS thyristor from Littelfuse Inc.'s SIDACtor® series, designed for transient voltage suppression applications. This component features a 6-SMD gull wing package with a peak pulse current rating of 250 A (8/20µs) and is optimized for surface mount assembly. The part is currently listed as obsolete, making identification of compatible substitutes essential for ongoing design support and production continuity.

Substiute Parts

P1803UBTP

Littelfuse Inc.In Stock: 1033P1803UBTP Datasheet

Current PartRFQ

P1803UBLTP

Littelfuse Inc.In Stock: 917P1803UBLTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P1803UBTP is determined by strict equivalence across the following critical parameters:

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

The P1803UBLTP qualifies as a direct substitute because it maintains identical electrical specifications and mechanical form factor. The only differences are packaging format (tube versus unspecified for the main part) and product status (active versus obsolete), along with improved RoHS and REACH compliance.

Parameter Comparison

Engineering Selection Recommendations

The P1803UBLTP is the direct equivalent for the obsolete P1803UBTP. Both components are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications. The P1803UBLTP is currently in active production status, ensuring availability for new designs and production replenishment.

The P1803UBLTP offers improved regulatory compliance, meeting ROHS3 requirements and REACH unaffected status, compared to the non-compliant status of the original part. This makes the P1803UBLTP the preferred selection for applications requiring current environmental and regulatory standards.

Both parts are supplied in the same Modified MS-013 package configuration and are suitable for surface mount assembly in 6-SMD gull wing format.

Frequently Asked Questions (FAQ)

Q: Can P1803UBLTP directly replace P1803UBTP in existing designs?

A: Yes. The P1803UBLTP is electrically and mechanically identical to the P1803UBTP. All voltage ratings, current specifications, capacitance values, and package dimensions are equivalent. No circuit redesign or PCB layout modification is required.

Q: What is the difference between P1803UBTP and P1803UBLTP?

A: The primary differences are product status and compliance certifications. The P1803UBTP is obsolete and RoHS non-compliant, while the P1803UBLTP is active production and ROHS3 compliant. The packaging format differs (tube for P1803UBLTP), but the component itself is identical.

Q: Are there any compatibility concerns with the 6-SMD gull wing package?

A: No. Both parts use the same Modified MS-013 package configuration. PCB footprints, reflow profiles, and assembly processes remain unchanged.

Q: Why should I select P1803UBLTP over P1803UBTP?

A: The P1803UBLTP is in active production and meets current RoHS3 and REACH compliance requirements. For new designs or production continuity, the P1803UBLTP is the appropriate choice due to its active status and regulatory compliance.

Q: Are the electrical specifications identical between these parts?

A: Yes. Breakover voltage (210V), off-state voltage (150V), on-state voltage (8V), peak pulse currents (250A at 8/20µs and 80A at 10/1000µs), hold current (150mA), and capacitance values (55pF, 85pF) are identical across both parts.