P6SMB9.1AT3 Equivalent & Substitute Parts

Part Overview

The P6SMB9.1AT3 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by onsemi, designed for surface mount applications in the DO-214AA (SMB) package. This component provides 13.4V clamping voltage with 45A peak pulse current capability and 600W peak pulse power dissipation. The part is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements.

Substiute Parts

P6SMB9.1AT3

onsemiIn Stock: 923P6SMB9.1AT3 Datasheet

Current PartRFQ

P6SMB9.1A

Taiwan Semiconductor CorporationIn Stock: 23875P6SMB9.1A Datasheet

DirectRFQ

P6SMB9.1A

Taiwan Semiconductor CorporationIn Stock: 23875P6SMB9.1A Datasheet

DirectRFQ

1KSMB9.1A

Littelfuse Inc.In Stock: 303071KSMB9.1A Datasheet

SimilarRFQ

SM6T10A

STMicroelectronicsIn Stock: 15265SM6T10A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB9.1AT3 is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 7.78V
• Voltage - Clamping (Max) @ Ipp: 13.4V
• Package / Case: DO-214AA, SMB (surface mount compatibility)
• Type: Zener (unidirectional TVS diode)
• Unidirectional Channels: 1

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical voltage specifications (7.78V standoff, 13.4V clamping) and compatible packaging, differing only in manufacturer and current handling capability.

Similar Alternatives: Parts with different voltage or current specifications that may serve comparable protective functions in specific applications but require circuit-level evaluation.

Parameter Comparison

Engineering Selection Recommendations

P6SMB9.1A (Taiwan Semiconductor Corporation): Direct equivalent with identical voltage specifications and equivalent current handling (47A vs. 45A). Active product status with ROHS3 compliance. Recommended for direct replacement in new designs and production continuity. Tape & Reel packaging available.

1KSMB9.1A (Littelfuse Inc.): Direct voltage equivalent (7.78V standoff, 13.4V clamping) with enhanced current capability (74.6A) and higher peak pulse power (1000W). Active product status with ROHS3 compliance. Suitable for applications requiring higher transient current handling within the same voltage protection window. Tape & Reel packaging available.

SM6T10A (STMicroelectronics): Similar alternative with higher voltage specifications (8.55V standoff, 18.6V clamping) and significantly higher current capability (215A at 8/20µs pulse). Active product status with ROHS3 compliance. Not a direct replacement; applicable only where higher voltage clamping is acceptable in the circuit design. Cut Tape & Digi-Reel packaging available.

Frequently Asked Questions (FAQ)

Q: Can P6SMB9.1A directly replace P6SMB9.1AT3?

A: Yes. Both parts share identical voltage specifications (7.78V standoff, 13.4V clamping) and compatible DO-214AA (SMB) packaging. The 47A current rating of P6SMB9.1A exceeds the original 45A specification, providing equivalent or superior protection. P6SMB9.1A is active and ROHS3 compliant.

Q: What is the difference between direct equivalents and similar alternatives?

A: Direct equivalents maintain identical voltage protection parameters (standoff and clamping voltages), ensuring circuit-level compatibility without design modification. Similar alternatives have different voltage specifications and require circuit evaluation to confirm suitability.

Q: Can SM6T10A be used as a substitute?

A: SM6T10A has different voltage specifications (8.55V standoff, 18.6V clamping) compared to the original part (7.78V standoff, 13.4V clamping). This part is a similar alternative, not a direct equivalent. Use only if circuit design permits higher voltage clamping levels.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use DO-214AA (SMB) surface mount packaging, ensuring mechanical and footprint compatibility. Packaging formats differ: P6SMB9.1A and 1KSMB9.1A are supplied in Tape & Reel; SM6T10A is supplied in Cut Tape & Digi-Reel.

Q: What compliance considerations apply to part selection?

A: The original P6SMB9.1AT3 is RoHS non-compliant. All active substitute parts (P6SMB9.1A, 1KSMB9.1A, SM6T10A) are ROHS3 compliant, meeting current environmental and regulatory requirements for new designs and production.

Q: How do current ratings affect substitution?

A: Current ratings indicate peak pulse handling capability. P6SMB9.1A (47A) and 1KSMB9.1A (74.6A) both exceed the original 45A specification, providing equal or enhanced transient protection. SM6T10A (215A at 8/20µs) operates at a different pulse standard and higher voltage, requiring separate evaluation.