P6SMB47C Equivalent & Substitute Parts

Part Overview

The P6SMB47C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This bidirectional Zener diode operates with a reverse standoff voltage of 40.2V and provides clamping at 68.04V with a peak pulse current of 9.4A. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Reverse Standoff Voltage (Typ)	40.2V
Breakdown Voltage (Min)	42.35V
Clamping Voltage (Max) @ Ipp	68.04V
Peak Pulse Current (10/1000µs)	9.4A
Peak Pulse Power	600W
Bidirectional Channels	1
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package Type	DO-214AA (SMB)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the P6SMB47C is determined by the following critical parameters:

Reverse standoff voltage of 40.2V (±tolerance)
Peak pulse current capability of 9.3A to 9.4A
Peak pulse power rating of 600W
Surface mount DO-214AA (SMB) package
Bidirectional Zener diode configuration
Operating temperature range compatibility

The substitute parts listed maintain these core electrical specifications within acceptable engineering tolerances. Clamping voltage variations (64.8V to 68.04V) and breakdown voltage differences reflect manufacturer-specific design variations while preserving functional equivalence for general-purpose transient suppression applications.

Parameter Comparison

Parameter	P6SMB47C (Main)	P6SMB47CA (Eaton)	SZP6SMB47CAT3G (Littelfuse)	P6SMB47CA-E3/52 (Vishay)	SMBJP6KE47CA-TP (MCC)	TVP06B470CA-G (Comchip)
Manufacturer	Littelfuse Inc.	Eaton - Electronics Division	Littelfuse Inc.	Vishay General Semiconductor	Micro Commercial Co	Comchip Technology
Reverse Standoff Voltage (Typ)	40.2V	40.2V	40.2V	40.2V	40.2V	40.2V
Breakdown Voltage (Min)	42.35V	44.7V	44.7V	44.7V	44.7V	—
Clamping Voltage (Max) @ Ipp	68.04V	64.8V	64.8V	64.8V	64.8V	—
Peak Pulse Current (10/1000µs)	9.4A	9.4A	9.3A	9.3A	9.4A	—
Peak Pulse Power	600W	600W	600W	600W	600W	600W
Operating Temperature Range	-55°C ~ 150°C	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 175°C	-55°C ~ 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

P6SMB47CA (Eaton) and SMBJP6KE47CA-TP (Micro Commercial Co) are the preferred substitutes. Both maintain identical reverse standoff voltage (40.2V), peak pulse current (9.4A), and peak pulse power (600W) specifications. Both are active products with full RoHS compliance and standard operating temperature ranges (-55°C ~ 150°C or -55°C ~ 175°C). These parts provide direct functional equivalence with established supply availability.

Secondary Substitutes (Extended Temperature Range):

SZP6SMB47CAT3G (Littelfuse) and P6SMB47CA-E3/52 (Vishay) offer extended lower operating temperature limits (-65°C) and are qualified to AEC-Q101 automotive standards. These parts are suitable for applications requiring enhanced temperature performance or automotive-grade reliability. Peak pulse current is marginally lower at 9.3A, which remains within acceptable tolerance for general-purpose transient suppression.

Alternative Substitute (Limited Data):

TVP06B470CA-G (Comchip) maintains package compatibility and 600W peak pulse power rating. However, complete electrical parameter specifications are not provided in the data. This part should be selected only when other substitutes are unavailable, with verification against application requirements.

Frequently Asked Questions (FAQ)

Q: Can I directly replace P6SMB47C with any of these substitute parts?

A: Yes, all listed substitute parts maintain the critical electrical parameters (40.2V reverse standoff voltage, 600W peak pulse power, DO-214AA SMB package) required for functional equivalence. Selection depends on product availability, temperature requirements, and compliance certifications needed for your application.

Q: What is the difference between the 64.8V and 68.04V clamping voltages?

A: Both values fall within acceptable engineering tolerance for transient voltage suppression. The P6SMB47C specifies 68.04V clamping, while most active substitutes specify 64.8V. This 3.24V difference reflects manufacturer-specific design variations and does not affect functional compatibility for general-purpose applications.

Q: Which substitute should I use for automotive applications?

A: SZP6SMB47CAT3G (Littelfuse) and P6SMB47CA-E3/52 (Vishay) carry AEC-Q101 automotive qualification. These parts are recommended for automotive-grade designs requiring enhanced reliability and temperature performance.

Q: Are all substitutes RoHS compliant?

A: Yes, all substitute parts listed are RoHS compliant (either RoHS or ROHS3 standard), matching the compliance status of the original P6SMB47C.

Q: What is the difference between Cut Tape and Tape & Reel packaging?

A: Both are surface mount packaging formats suitable for automated assembly. Cut Tape (CT) is used for lower-volume applications, while Tape & Reel (TR) is standard for high-volume production. Electrical performance is identical; selection depends on procurement volume and assembly process requirements.

Q: Can I use SMBJP6KE47CA-TP if my design operates at 175°C?

A: Yes, SMBJP6KE47CA-TP is rated for -55°C ~ 175°C operating temperature, making it suitable for high-temperature applications. Other substitutes are typically rated to 150°C maximum.

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