P0642SA Equivalent & Substitute Parts

Part Overview

The P0642SA is a 58V off-state TVS thyristor manufactured by Littelfuse Inc. in the DO-214AA (SMB) package. This component is classified as a Transient Voltage Suppressor and is part of the TwinChip™ series. The part is currently listed as obsolete, which necessitates identification of active equivalent alternatives for continued system design and procurement.

Substiute Parts

P0642SA

Littelfuse Inc.In Stock: 1025P0642SA Datasheet

Current PartRFQ

P0642SALRP

Littelfuse Inc.In Stock: 40599P0642SALRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P0642SA is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:

• Voltage - Off State: 58V
• Voltage - Breakover: 77V
• Voltage - On State: 8V
• Current - Peak Pulse (8/20µs): 150A
• Current - Peak Pulse (10/1000µs): 45A
• Current - Hold (Ih): 120mA
• Number of Elements: 2
• Capacitance: 45pF
• Package / Case: DO-214AA, SMB

The P0642SALRP meets all electrical specifications and mechanical requirements of the P0642SA while maintaining identical performance characteristics across all rated parameters.

Parameter Comparison

Engineering Selection Recommendations

The P0642SALRP is the direct equivalent substitute for the P0642SA. Both parts are manufactured by Littelfuse Inc. and share identical electrical and mechanical specifications across all rated parameters. The P0642SALRP offers the additional advantage of active product status, ensuring continued availability and supply chain reliability.

The P0642SALRP carries ROHS3 compliance certification, whereas the P0642SA is non-compliant. For applications subject to RoHS regulatory requirements, the P0642SALRP is the appropriate selection. The P0642SALRP is supplied in Tape & Reel packaging, suitable for automated assembly processes, compared to the bulk packaging of the P0642SA.

Frequently Asked Questions (FAQ)

Q: Can the P0642SALRP be used as a direct replacement for the P0642SA?

A: Yes. The P0642SALRP is electrically and mechanically equivalent to the P0642SA. All voltage ratings, current ratings, capacitance, element count, and package specifications are identical.

Q: What is the difference between the P0642SA and P0642SALRP?

A: The primary differences are product status, RoHS compliance, and packaging format. The P0642SA is obsolete and non-compliant with RoHS3, while the P0642SALRP is active and ROHS3 compliant. The P0642SALRP is supplied in Tape & Reel packaging for automated assembly.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts maintain identical electrical performance across all specified parameters: 58V off-state voltage, 77V breakover voltage, 150A peak pulse current (8/20µs), 45A peak pulse current (10/1000µs), 120mA hold current, and 45pF capacitance.

Q: Is the DO-214AA package compatible with existing PCB designs?

A: Yes. Both the P0642SA and P0642SALRP use the DO-214AA (SMB) surface mount package. PCB footprints and assembly processes remain unchanged.

Q: Why should I select the P0642SALRP over the P0642SA?

A: The P0642SALRP is the recommended selection due to active product status, ensuring long-term availability and supply chain continuity. ROHS3 compliance satisfies regulatory requirements for applications subject to RoHS directives.