P1804UATP Equivalent & Substitute Parts

Part Overview

The P1804UATP is a Transient Voltage Suppressor (TVS) thyristor from Littelfuse Inc., part of the SIDACtor® series. This component is designed for overvoltage protection applications requiring 170V/340V off-state voltage suppression with 150A peak pulse current capability in a 6-SMD gull wing surface mount package. The P1804UATP is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

P1804UATP

Littelfuse Inc.In Stock: 919P1804UATP Datasheet

Current PartRFQ

P1804UALTP

Littelfuse Inc.In Stock: 1074P1804UALTP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P1804UATP is determined by electrical and mechanical parameter equivalence within the TVS thyristor category. The critical parameters governing substitution are:

• Voltage ratings (breakover and off-state): 220V/440V and 170V/340V respectively
• Peak pulse current capability: 150A at 8/20µs pulse width
• On-state voltage: 4V
• Hold current: 150mA
• Physical package: 6-SMD gull wing surface mount configuration
• Element count: 4 elements

The P1804UALTP maintains identical electrical specifications and mechanical packaging, differing only in product status (active vs. obsolete) and packaging format (tube vs. unspecified for the original part).

Parameter Comparison

Engineering Selection Recommendations

The P1804UALTP is a direct functional equivalent to the P1804UATP with identical electrical and mechanical specifications. The primary distinction is product lifecycle status: P1804UALTP is active and available, while P1804UATP is obsolete.

For new designs and ongoing production support, P1804UALTP is the appropriate selection. Additionally, P1804UALTP carries ROHS3 compliance certification, whereas the original part is RoHS non-compliant. This compliance difference may be relevant for applications subject to regulatory requirements. Both parts maintain identical moisture sensitivity levels and export classifications.

Frequently Asked Questions (FAQ)

Q: Can P1804UALTP be used as a direct replacement for P1804UATP?

A: Yes. Both parts are manufactured by Littelfuse Inc. and share identical electrical parameters (voltage ratings, current ratings, on-state voltage, and hold current) and mechanical specifications (6-SMD gull wing package, Modified MS-013 supplier package, four elements, and capacitance values).

Q: What is the primary difference between these parts?

A: The P1804UALTP is the active production equivalent of the obsolete P1804UATP. Additionally, P1804UALTP is ROHS3 compliant while P1804UATP is RoHS non-compliant. Packaging format differs (tube for P1804UALTP).

Q: Are there any compatibility concerns with PCB assembly?

A: No. Both parts use identical surface mount packaging (6-SMD gull wing, Modified MS-013), ensuring footprint and assembly process compatibility.

Q: Does the RoHS compliance difference affect electrical performance?

A: No. RoHS compliance status reflects manufacturing process and material composition but does not alter the electrical or thermal characteristics of the component. All electrical parameters remain identical.

Q: What is the moisture sensitivity level for these parts?

A: Both parts carry MSL 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.