P6SMB9.1 Equivalent & Substitute Parts

Part Overview

The P6SMB9.1 is a unidirectional Zener Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc. in DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a reverse standoff voltage of 7.78V and peak pulse power rating of 600W. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

P6SMB9.1

Littelfuse Inc.In Stock: 1243P6SMB9.1 Datasheet

Current PartRFQ

P6SMB9.1A

Taiwan Semiconductor CorporationIn Stock: 23875P6SMB9.1A Datasheet

DirectRFQ

P6SMB9.1A

Taiwan Semiconductor CorporationIn Stock: 23875P6SMB9.1A Datasheet

DirectRFQ

TVP06B9V1A-G

Comchip TechnologyIn Stock: 809TVP06B9V1A-G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6SMB9.1 is determined by the following critical parameters that must remain within acceptable tolerances:

• Voltage - Reverse Standoff (Typ): 7.78V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 14.07V maximum (lower values acceptable)
• Current - Peak Pulse (10/1000µs): 45.5A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA (SMB) surface mount
• Operating Temperature Range: -55°C to 150°C (TJ)
• Type: Zener, Unidirectional (1 channel)

Substitute parts must maintain electrical performance within these parameters while meeting the same physical and thermal specifications. All identified substitutes share the same package type, power rating, and temperature operating range.

Parameter Comparison

Engineering Selection Recommendations

Both P6SMB9.1A (Taiwan Semiconductor Corporation) and TVP06B9V1A-G (Comchip Technology) are active product alternatives to the obsolete P6SMB9.1. Selection between these substitutes should be based on the following factors:

P6SMB9.1A offers direct electrical equivalence with identical reverse standoff voltage (7.78V) and improved clamping voltage (13.4V vs. 14.07V), providing enhanced transient suppression performance. This part is available in higher inventory quantities (23,850 pcs) and maintains the same series designation (P6SMB).

TVP06B9V1A-G provides comparable performance with reverse standoff voltage of 7.8V and clamping voltage of 13.4V. Peak pulse current is 44.78A, which remains within acceptable tolerance of the original 45.5A specification. This part is manufacturer-recommended and carries REACH compliance documentation.

Both substitutes are ROHS3 compliant, carry MSL rating of 1 (Unlimited), and maintain the same operating temperature range (-55°C to 150°C TJ). Selection may be determined by supply chain availability, procurement lead times, and specific application requirements for clamping voltage performance.

Frequently Asked Questions (FAQ)

Q: Can P6SMB9.1A be used as a direct replacement for P6SMB9.1?

A: Yes. P6SMB9.1A maintains the same reverse standoff voltage (7.78V), package type (DO-214AA SMB), power rating (600W), and operating temperature range (-55°C to 150°C TJ). The clamping voltage is lower (13.4V vs. 14.07V), which provides improved transient suppression performance in most applications.

Q: What is the difference between P6SMB9.1A and TVP06B9V1A-G?

A: Both parts share the same package, power rating, and temperature range. The primary differences are reverse standoff voltage (7.78V vs. 7.8V) and peak pulse current (47A vs. 44.78A). Both clamping voltages are 13.4V. TVP06B9V1A-G is manufacturer-recommended by Littelfuse for P6SMB9.1 applications.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the DO-214AA (SMB) surface mount package, ensuring identical PCB footprint compatibility. No layout modifications are required when substituting between these parts.

Q: What compliance certifications apply to the substitute parts?

A: Both P6SMB9.1A and TVP06B9V1A-G are ROHS3 compliant and carry MSL rating of 1 (Unlimited). TVP06B9V1A-G includes REACH compliance documentation. Both parts meet the same environmental and regulatory standards as the original P6SMB9.1.

Q: Which substitute should be selected for new designs?

A: For new designs, either P6SMB9.1A or TVP06B9V1A-G are appropriate selections. P6SMB9.1A offers higher inventory availability and maintains the same series designation. TVP06B9V1A-G is the manufacturer-recommended alternative. Selection should be based on supply chain availability and application-specific clamping voltage requirements.