P6SMB47AT3G Equivalent & Substitute Parts

Part Overview

The P6SMB47AT3G is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 40.2V reverse standoff voltage and 64.8V maximum clamping voltage, delivering 9.3A peak pulse current in a compact SMB (DO-214AA) package. The P6SMB47AT3G is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	40.2V
Voltage - Breakdown (Min)	44.7V
Voltage - Clamping (Max) @ Ipp	64.8V
Current - Peak Pulse (10/1000µs)	9.3A
Power - Peak Pulse	600W
Operating Temperature Range	-65°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the P6SMB47AT3G is determined by strict electrical and mechanical compatibility across the following parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 40.2V
Voltage - Clamping (Max) @ Ipp: 64.8V
Voltage - Breakdown (Min): 44.7V
Package / Case: DO-214AA, SMB (surface mount)
Type: Zener, Unidirectional (1 channel)
Mounting Type: Surface Mount

Acceptable Variation Parameters:

Current - Peak Pulse (10/1000µs): 9.3A to 15.4A (higher current ratings are acceptable for increased transient protection margin)
Power - Peak Pulse: 600W to 1000W (higher power ratings are acceptable)
Operating Temperature Range: Minimum -55°C acceptable (original -65°C); maximum 150°C to 175°C acceptable
Product Status: Active parts preferred over obsolete

Substitute parts must maintain identical voltage specifications and package form factor. Peak pulse current and power dissipation may exceed the original specification without compromising compatibility. Temperature range extensions are acceptable for enhanced reliability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status	RoHS Status
P6SMB47AT3G	Littelfuse Inc.	40.2V	64.8V	9.3A	600W	-65°C ~ 150°C	DO-214AA, SMB	Obsolete	ROHS3 Compliant
P6SMB47A	Eaton - Electronics Division	40.2V	64.8V	9.4A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active	RoHS Compliant
1KSMB47A	Taiwan Semiconductor Corporation	40.2V	64.8V	15.4A	1000W	-55°C ~ 175°C	DO-214AA, SMB	Active	ROHS3 Compliant
TPSMB47A	Littelfuse Inc.	40.2V	64.8V	9.4A	600W	-65°C ~ 175°C	DO-214AA, SMB	Active	ROHS3 Compliant
P6SMB47A-M3/52	Vishay General Semiconductor - Diodes Division	40.2V	64.8V	9.3A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
P6SMB47A-M3/5B	Vishay General Semiconductor - Diodes Division	40.2V	64.8V	9.3A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJP6KE47A-TP	Micro Commercial Co	40.2V	64.8V	9.4A	600W	-55°C ~ 175°C	DO-214AA, SMB	Active	ROHS3 Compliant
TVP06B470A-G	Comchip Technology	40.2V	64.8V	Not specified	600W	-55°C ~ 150°C	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

P6SMB47A-M3/52 and P6SMB47A-M3/5B from Vishay General Semiconductor are direct functional equivalents with identical electrical specifications to the P6SMB47AT3G. Both parts maintain the original -65°C to 150°C operating temperature range and 9.3A peak pulse current. These parts are active products with ROHS3 compliance and represent the closest electrical match.

TPSMB47A from Littelfuse Inc. provides an active alternative from the original manufacturer with identical voltage ratings and current specifications. This part extends the upper operating temperature to 175°C and maintains ROHS3 compliance, offering enhanced thermal performance.

Secondary Substitutes (Enhanced Performance):

1KSMB47A from Taiwan Semiconductor Corporation delivers increased peak pulse current (15.4A) and power dissipation (1000W) while maintaining identical voltage specifications. This part is suitable for applications requiring higher transient energy absorption. Operating temperature range extends to 175°C.

SMBJP6KE47A-TP from Micro Commercial Co provides equivalent electrical performance with extended temperature range (-55°C to 175°C) and active product status.

P6SMB47A from Eaton - Electronics Division offers active product status with minimal electrical variation (9.4A vs. 9.3A peak pulse current).

Conditional Substitute:

TVP06B470A-G from Comchip Technology maintains voltage and package specifications but lacks published peak pulse current data. This part is suitable only when complete electrical characterization can be verified through the manufacturer.

All substitute parts are surface-mount compatible with the original DO-214AA (SMB) package footprint and maintain RoHS compliance.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher peak pulse current than the original P6SMB47AT3G?

A: Yes. The 1KSMB47A with 15.4A peak pulse current is a valid substitute. Higher current ratings provide increased transient protection margin without compromising circuit compatibility. The clamping voltage remains identical at 64.8V.

Q: What is the difference between the Vishay P6SMB47A-M3/52 and P6SMB47A-M3/5B parts?

A: Both parts are electrically identical with matching voltage, current, and temperature specifications. The suffix designations (-M3/52 and -M3/5B) indicate different packaging configurations (Tape & Box). Selection depends on procurement and assembly requirements.

Q: Is the TPSMB47A suitable for high-temperature applications?

A: Yes. The TPSMB47A extends the maximum operating temperature to 175°C compared to the original 150°C limit. This part is qualified to AEC-Q101 automotive standards and maintains identical voltage and current specifications.

Q: Can I substitute the P6SMB47AT3G with the 1KSMB47A in a cost-sensitive design?

A: The 1KSMB47A is electrically compatible but delivers higher power dissipation (1000W vs. 600W). Use this part only if the circuit design can accommodate the enhanced performance characteristics. Verify PCB thermal management is adequate for the higher power rating.

Q: What is the impact of using a substitute with a different operating temperature range?

A: Operating temperature range differences do not affect circuit compatibility. Parts with extended ranges (such as -55°C to 175°C vs. -65°C to 150°C) provide enhanced reliability in extreme environments. Parts with narrower ranges remain fully compatible for standard operating conditions.

Q: Is the TVP06B470A-G from Comchip Technology a direct replacement?

A: The TVP06B470A-G maintains identical voltage specifications and package form factor. However, peak pulse current is not published in available data. Confirm complete electrical characterization with the manufacturer before design implementation.

Q: Do all substitute parts maintain RoHS compliance?

A: Yes. All listed substitute parts are ROHS3 compliant or RoHS compliant, matching the environmental standards of the original P6SMB47AT3G.

Q: Can I mix different substitute parts in the same production run?

A: All listed substitutes are electrically interchangeable within the specified parameter tolerances. However, verify with your assembly partner that mixed part sourcing does not conflict with traceability or quality documentation requirements.

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