P6SMB47 Equivalent & Substitute Parts

Part Overview

The P6SMB47 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a reverse standoff voltage of 40.2V and a maximum clamping voltage of 68.04V at peak pulse current. The P6SMB47 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal specifications while meeting modern compliance standards.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	40.2	V
Voltage - Breakdown (Min)	42.35	V
Voltage - Clamping (Max) @ Ipp	68.04	V
Current - Peak Pulse (10/1000µs)	9.4	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitution of the P6SMB47 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Criteria:

Voltage - Reverse Standoff (Typ): 40.2V
Voltage - Clamping (Max) @ Ipp: Must not exceed 68.04V
Current - Peak Pulse (10/1000µs): 9.3A to 9.4A
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Type: Zener
Unidirectional Channels: 1

All substitute parts listed maintain the 40.2V reverse standoff voltage specification. Clamping voltage variations (64.8V to 68.04V) remain within acceptable operational limits for the same circuit protection function. Peak pulse current ratings of 9.3A to 9.4A ensure equivalent transient suppression capability. All substitutes are housed in DO-214AA (SMB) surface-mount packages, ensuring mechanical and thermal compatibility with the original design.

Parameter Comparison

Parameter	P6SMB47 (Littelfuse)	P6SMB47A (Eaton)	P6SMB47A-E3/52 (Vishay)	P6SMB47A-M3/52 (Vishay)	P6SMB47A-M3/5B (Vishay)	SMBJP6KE47A-TP (MCC)	TVP06B470A-G (Comchip)
Voltage - Reverse Standoff (Typ)	40.2V	40.2V	40.2V	40.2V	40.2V	40.2V	-
Voltage - Breakdown (Min)	42.35V	44.7V	44.7V	44.7V	44.7V	44.7V	-
Voltage - Clamping (Max) @ Ipp	68.04V	64.8V	64.8V	64.8V	64.8V	64.8V	-
Current - Peak Pulse (10/1000µs)	9.4A	9.4A	9.3A	9.3A	9.3A	9.4A	-
Power - Peak Pulse	600W	600W	600W	600W	600W	600W	600W
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-55 to 175°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Type	Zener	Zener	Zener	Zener	Zener	Zener	Zener
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing status, eliminating obsolescence risk associated with the original P6SMB47. Selection among substitutes should be based on the following factors:

Compliance and Certification: All substitute parts maintain ROHS3 compliance or equivalent RoHS certification, ensuring regulatory compatibility with modern manufacturing and end-use requirements. The P6SMB47A (Eaton) and SMBJP6KE47A-TP (Micro Commercial Co) are direct electrical equivalents with identical peak pulse current ratings of 9.4A. The Vishay variants (P6SMB47A-E3/52, P6SMB47A-M3/52, P6SMB47A-M3/5B) operate at 9.3A peak pulse current with extended lower operating temperature limits (-65°C minimum versus -55°C), providing enhanced thermal margin in cold environments. The SMBJP6KE47A-TP extends the upper operating temperature to 175°C, offering superior thermal performance in high-temperature applications.

Packaging Availability: Eaton and Micro Commercial Co supply parts in Tape & Reel (TR) packaging for high-volume automated assembly. Vishay offers Tape & Box (TB) packaging options for lower-volume requirements. All parts are housed in DO-214AA (SMB) surface-mount packages with identical footprints and thermal characteristics.

Inventory and Lead Time: Selection should consider supplier inventory levels and procurement timelines. Eaton P6SMB47A maintains the highest inventory (17,200 pcs), while Vishay variants and Micro Commercial Co options provide alternative sourcing paths with adequate stock levels.

The TVP06B470A-G (Comchip) is listed as a substitute but lacks complete electrical parameter documentation, making it unsuitable for direct selection without additional verification from the manufacturer.

Frequently Asked Questions (FAQ)

Q: Can I use P6SMB47A as a direct replacement for P6SMB47?

A: Yes. The P6SMB47A (Eaton) is a direct electrical equivalent with identical reverse standoff voltage (40.2V), peak pulse current (9.4A), and power dissipation (600W). Both are housed in DO-214AA (SMB) packages with identical footprints and thermal performance. The primary difference is product status: P6SMB47A is active, while P6SMB47 is obsolete.

Q: What is the difference between the Vishay variants (P6SMB47A-E3/52, P6SMB47A-M3/52, P6SMB47A-M3/5B)?

A: All three Vishay parts are electrically identical with 40.2V reverse standoff voltage, 64.8V clamping voltage, and 9.3A peak pulse current. The differences are packaging format (E3/52 uses Tape & Reel; M3/52 and M3/5B use Tape & Box) and supplier device package designation. Operating temperature ranges are identical (-65°C to 150°C), providing extended low-temperature performance compared to the original P6SMB47.

Q: Why does the clamping voltage differ between substitutes (64.8V vs. 68.04V)?

A: Clamping voltage variation within the 64.8V to 68.04V range reflects manufacturing tolerance and design differences among suppliers while maintaining functional equivalence for circuit protection. All values remain within acceptable limits for the same protection function. The lower clamping voltage (64.8V) in substitute parts provides slightly tighter voltage regulation during transient suppression events.

Q: Is SMBJP6KE47A-TP suitable for high-temperature applications?

A: Yes. The SMBJP6KE47A-TP (Micro Commercial Co) operates across -55°C to 175°C, extending the upper temperature limit by 25°C compared to the original P6SMB47 (-55°C to 150°C). This makes it suitable for applications requiring enhanced thermal performance in elevated-temperature environments.

Q: Can I mix different substitute parts in the same circuit board assembly?

A: Yes. All substitute parts maintain identical reverse standoff voltage (40.2V), peak pulse current (9.3A to 9.4A), and power dissipation (600W) specifications. They are housed in identical DO-214AA (SMB) packages with equivalent thermal characteristics, allowing interchangeable use within the same design.

Q: What should I verify before selecting TVP06B470A-G?

A: The TVP06B470A-G lacks complete electrical parameter documentation in the provided specifications. Before selection, obtain detailed electrical characteristics from Comchip Technology, specifically: voltage breakdown minimum, clamping voltage maximum, and peak pulse current rating. Confirm these parameters match the 40.2V reverse standoff and 600W power dissipation requirements.

Q: Are all substitutes RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant or equivalent RoHS certified, meeting regulatory requirements for hazardous substance restrictions in electronic components.

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