P1804UCTP Equivalent & Substitute Parts

Part Overview

The P1804UCTP is a SIDACtor® TVS thyristor manufactured by Littelfuse Inc., designed for transient voltage suppression applications. This component features a 170V/340V off-state voltage rating with 400A peak pulse current capability in a 6-SMD gull wing surface mount package. The part is classified as obsolete, making identification of suitable substitutes essential for ongoing production and maintenance applications requiring equivalent electrical and mechanical performance.

Substiute Parts

P1804UCTP

Littelfuse Inc.In Stock: 1019P1804UCTP Datasheet

Current PartRFQ

P1804UCLTP

Littelfuse Inc.In Stock: 839P1804UCLTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P1804UCTP is determined by strict equivalence across the following critical parameters:

• Voltage ratings (breakover and off-state): 220V/440V and 170V/340V respectively
• On-state voltage: 4V
• Peak pulse current specifications: 400A (8/20µs) and 100A (10/1000µs)
• Hold current: 150 mA
• Element count: 4 elements
• Capacitance range: 50pF to 90pF
• Package configuration: 6-SMD gull wing surface mount
• Moisture sensitivity: MSL 1

The P1804UCLTP meets all these criteria and qualifies as a direct electrical and mechanical equivalent.

Parameter Comparison

Engineering Selection Recommendations

The P1804UCLTP is the direct substitute for the obsolete P1804UCTP. Both components are manufactured by Littelfuse Inc. and share identical electrical specifications and mechanical packaging. The primary distinction is product status and regulatory compliance: the P1804UCLTP is active production and ROHS3 compliant, whereas the P1804UCTP is obsolete and RoHS non-compliant. For new designs and ongoing production requiring transient voltage suppression with these specifications, the P1804UCLTP is the appropriate selection. The packaging difference (tube for P1804UCLTP versus unspecified for P1804UCTP) does not affect electrical or mechanical compatibility in circuit applications.

Frequently Asked Questions (FAQ)

Q: Can P1804UCLTP replace P1804UCTP in existing designs? A: Yes. The P1804UCLTP provides identical electrical performance and mechanical fit. Both components feature the same voltage ratings, current ratings, element count, and 6-SMD gull wing package configuration.

Q: What is the difference between these two part numbers? A: The P1804UCLTP is the active production equivalent of the obsolete P1804UCTP. The substitute offers improved regulatory compliance (ROHS3) and current availability, with no changes to electrical or mechanical specifications.

Q: Are there any package or mounting differences? A: No. Both parts use identical 6-SMD gull wing surface mount packaging with Modified MS-013 supplier device package designation. PCB footprints and assembly processes remain unchanged.

Q: What certifications apply to the substitute part? A: The P1804UCLTP is ROHS3 compliant and REACH unaffected. The original P1804UCTP is RoHS non-compliant.

Q: Is the substitute part available in the same packaging format? A: The P1804UCLTP is supplied in tube packaging. Both parts maintain the same electrical and mechanical specifications required for direct substitution.