P1504UARP Equivalent & Substitute Parts

Part Overview

The P1504UARP is a SIDACtor® thyristor transient voltage suppressor manufactured by Littelfuse, designed for overvoltage protection in surface mount applications. This component features 140V/280V off-state voltage ratings with 150A peak pulse current capability in a 6-SMD gull wing package. The part is currently classified as obsolete, making identification of compatible substitutes essential for ongoing system support and component procurement.

Substiute Parts

P1504UARP

LittelfuseIn Stock: 920P1504UARP Datasheet

Current PartRFQ

P1504UALRP

Littelfuse Inc.In Stock: 1170P1504UALRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P1504UARP is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical):

• Voltage ratings: Breakover voltage (180V, 360V), off-state voltage (140V, 280V), and on-state voltage (4V) must match exactly
• Current specifications: Peak pulse current (8/20µs and 10/1000µs) and hold current must be identical
• Element count: 4 elements required
• Capacitance range: 25pF to 40pF

Mechanical Parameters (Critical):

• Package type: 6-SMD, Gull Wing configuration
• Mounting: Surface mount only
• Supplier device package: Modified MS-013

The P1504UALRP meets all electrical and mechanical requirements for direct substitution with the P1504UARP, with the primary distinction being packaging format and product status.

Parameter Comparison

Engineering Selection Recommendations

The P1504UALRP is the direct electrical and mechanical equivalent of the P1504UARP. Selection between these parts should be based on the following factors:

Product Status: The P1504UARP is obsolete, while the P1504UALRP is active. For new designs or ongoing production requiring long-term component availability, the P1504UALRP is the appropriate choice.

Compliance Requirements: The P1504UALRP is ROHS3 compliant, whereas the P1504UARP is RoHS non-compliant. Systems subject to RoHS regulations must use the P1504UALRP.

Packaging Format: The P1504UARP is supplied in bulk packaging, while the P1504UALRP is supplied in Tape & Reel format. Tape & Reel packaging is standard for automated assembly processes and reduces component handling.

Regulatory Status: The P1504UALRP includes REACH unaffected status documentation, providing additional regulatory clarity for international applications.

Frequently Asked Questions (FAQ)

Q: Can the P1504UALRP replace the P1504UARP in existing designs?

A: Yes. The P1504UALRP is electrically and mechanically identical to the P1504UARP across all critical parameters: voltage ratings, current specifications, element count, capacitance, and package configuration. The components are pin-compatible and functionally interchangeable.

Q: What is the difference between these two part numbers?

A: The primary differences are product status (obsolete vs. active), packaging format (bulk vs. Tape & Reel), and RoHS compliance status (non-compliant vs. ROHS3 compliant). Electrical and mechanical specifications are identical.

Q: Why is the P1504UARP listed as obsolete?

A: Obsolescence indicates the manufacturer has discontinued production of this specific part number. The P1504UALRP represents the current production equivalent with identical electrical performance.

Q: Is Tape & Reel packaging compatible with my assembly process?

A: Tape & Reel is the standard packaging format for automated surface mount assembly. If your process uses manual placement or bulk component handling, component reeling may be required. Consult your assembly equipment specifications.

Q: Are there any compliance concerns when switching from P1504UARP to P1504UALRP?

A: The P1504UALRP provides improved compliance status with ROHS3 certification and REACH unaffected documentation. If your application is subject to RoHS regulations, the P1504UALRP is the required choice.

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

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage practices are sufficient.