P0900SA Equivalent & Substitute Parts

Part Overview

The P0900SA is a 75V off-state, 150A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the SIDACtor® series, housed in a DO-214AA (SMB) surface mount package. This component is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support. The part's primary function is transient voltage suppression in electronic circuits requiring bidirectional overvoltage protection.

Substiute Parts

P0900SA

Littelfuse Inc.In Stock: 30305P0900SA Datasheet

Current PartRFQ

P0900SALRP

Littelfuse Inc.In Stock: 30417P0900SALRP Datasheet

DirectRFQ

SMP100LC-90

STMicroelectronicsIn Stock: 1946SMP100LC-90 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P0900SA is determined by electrical and mechanical compatibility within the TVS thyristor category. The critical parameters governing substitution are:

• Voltage rating compatibility (off-state and breakover voltage ranges)
• Peak pulse current capability (8/20µs and 10/1000µs ratings)
• Hold current specification
• Package form factor (DO-214AA, SMB)
• Surface mount mounting type

Two substitute parts are identified: P0900SALRP (direct Littelfuse equivalent) and SMP100LC-90 (STMicroelectronics alternative). Both maintain the DO-214AA package and surface mount configuration. Electrical parameters vary within acceptable substitution ranges for transient voltage suppression applications.

Parameter Comparison

Engineering Selection Recommendations

P0900SALRP is the direct functional equivalent to P0900SA, maintaining identical electrical specifications (75V off-state, 98V breakover, 150A peak pulse at 8/20µs, 45A at 10/1000µs, 150mA hold current, 55pF capacitance) while offering active product status and ROHS3 compliance. This part is the primary recommendation for direct replacement in existing designs.

SMP100LC-90 is an alternative from STMicroelectronics with higher voltage ratings (90V off-state, 125V breakover) and significantly higher current capability (400A at 8/20µs, 100A at 10/1000µs). This part is suitable for applications requiring enhanced transient suppression performance or higher current handling. The increased capacitance (80pF versus 55pF) and higher voltage specifications represent design trade-offs that must be evaluated against circuit requirements.

Both substitute parts maintain DO-214AA package compatibility and surface mount configuration. Both are ROHS3 compliant and REACH unaffected, addressing regulatory requirements absent in the obsolete P0900SA.

Frequently Asked Questions (FAQ)

Q: Can P0900SALRP be used as a direct drop-in replacement for P0900SA?

A: Yes. P0900SALRP maintains identical electrical specifications and package form factor. The primary difference is product status (active versus obsolete) and regulatory compliance (ROHS3 compliant versus non-compliant).

Q: What are the key differences between P0900SALRP and SMP100LC-90?

A: P0900SALRP matches the original P0900SA specifications exactly. SMP100LC-90 offers higher voltage ratings (90V off-state versus 75V, 125V breakover versus 98V) and significantly higher peak pulse current capability (400A versus 150A at 8/20µs). The SMP100LC-90 also has higher capacitance (80pF versus 55pF).

Q: Is SMP100LC-90 compatible with circuits designed for P0900SA?

A: SMP100LC-90 is mechanically compatible (DO-214AA package, surface mount) and functionally compatible for transient voltage suppression. However, the higher voltage ratings and current capability represent different electrical characteristics. Circuit validation is necessary to confirm suitability for specific applications.

Q: Are both substitute parts available in the same packaging format?

A: Yes. Both P0900SALRP and SMP100LC-90 use DO-214AA (SMB) surface mount packages. P0900SALRP is supplied as standard packaging; SMP100LC-90 is supplied in Tape & Reel format.

Q: What compliance certifications apply to the substitute parts?

A: Both P0900SALRP and SMP100LC-90 are ROHS3 compliant and REACH unaffected. The original P0900SA is RoHS non-compliant, making these substitutes necessary for applications with regulatory compliance requirements.