P6SMB16AT3G Equivalent & Substitute Parts

Part Overview

The P6SMB16AT3G 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 13.6V reverse standoff voltage and 22.5V maximum clamping voltage, delivering 27A peak pulse current in a compact SMB (DO-214AA) package. The P6SMB16AT3G is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	13.6V
Voltage - Breakdown (Min)	15.2V
Voltage - Clamping (Max) @ Ipp	22.5V
Current - Peak Pulse (10/1000µs)	27A
Power - Peak Pulse	600W
Package / Case	DO-214AA, SMB
Operating Temperature Range	-65°C ~ 150°C (TJ)
Type	Zener
Unidirectional Channels	1
Mounting Type	Surface Mount

Substitute Part Grouping Explanation

Substitute parts for the P6SMB16AT3G are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff: 13.6V ± tolerance
Voltage - Clamping (Max) @ Ipp: 22.5V ± tolerance
Voltage - Breakdown (Min): 15.2V ± tolerance
Current - Peak Pulse (10/1000µs): ≥27A
Package / Case: DO-214AA or SMB equivalent
Type: Zener diode, unidirectional (1 channel)
Mounting Type: Surface Mount

Acceptable Variations:

Peak pulse current may exceed 27A (higher current rating provides equivalent or improved performance)
Operating temperature range may extend beyond the original specification
Power dissipation may exceed 600W (higher rating is acceptable)
Packaging format may vary between SMB and DO-214AA designations (functionally equivalent)

Non-Substitutable Differences:

Voltage ratings outside the specified range
Different package types (e.g., SMA vs. SMB)
Bidirectional or multi-channel configurations

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package / Case	Product Status
P6SMB16AT3G	Littelfuse Inc.	13.6V	15.2V	22.5V	27A	600W	-65°C ~ 150°C	DO-214AA, SMB	Obsolete
P6SMB16A	Eaton - Electronics Division	13.6V	15.2V	22.5V	27.1A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
1KSMB16A	Taiwan Semiconductor Corporation	13.6V	15.2V	22.5V	44.4A	1000W	-55°C ~ 175°C	DO-214AA, SMB	Active
SMBJ16A	EVVO Semi	16V	17.8V	26V	23.1A	600W	-65°C ~ 150°C	DO-214AC, SMA	Active
TPSMB16A	Littelfuse Inc.	13.6V	15.2V	22.5V	27.1A	600W	-65°C ~ 175°C	DO-214AA, SMB	Active
SMBJP6KE16A-TP	Micro Commercial Co	13.6V	15.2V	22.5V	27.1A	600W	-55°C ~ 175°C	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

P6SMB16A (Eaton), TPSMB16A (Littelfuse), and SMBJP6KE16A-TP (Micro Commercial Co) are direct electrical equivalents with matching voltage ratings (13.6V standoff, 22.5V clamping) and current specifications (27.1A). All three are active products with RoHS3 compliance. TPSMB16A includes AEC-Q101 automotive qualification and extended temperature range (-65°C ~ 175°C), suitable for applications requiring automotive-grade reliability. SMBJP6KE16A-TP offers the widest operating temperature range (-55°C ~ 175°C) among active alternatives.

Enhanced Performance Alternative:

1KSMB16A (Taiwan Semiconductor Corporation) maintains identical voltage specifications but provides significantly higher peak pulse current (44.4A) and power dissipation (1000W). This part is suitable for applications requiring additional transient energy absorption margin. Operating temperature range extends to 175°C.

Limited Compatibility:

SMBJ16A (EVVO Semi) has higher voltage ratings (16V standoff, 26V clamping) and uses a different package format (DO-214AC, SMA). This part is not recommended as a direct substitute due to voltage specification mismatch and package incompatibility.

Frequently Asked Questions (FAQ)

Q: Can P6SMB16A replace P6SMB16AT3G directly?

A: Yes. P6SMB16A matches all critical electrical parameters: 13.6V reverse standoff, 22.5V clamping voltage, and 27.1A peak pulse current. Both use DO-214AA/SMB packaging. P6SMB16A is an active product from Eaton, making it the most straightforward replacement for the obsolete P6SMB16AT3G.

Q: What is the difference between TPSMB16A and P6SMB16A?

A: Both parts share identical voltage and current ratings. TPSMB16A is manufactured by Littelfuse with AEC-Q101 automotive qualification and extended temperature range (-65°C ~ 175°C). P6SMB16A from Eaton operates from -55°C ~ 150°C. Select TPSMB16A for automotive or high-temperature applications.

Q: Why is 1KSMB16A listed as a substitute if it has higher current and power ratings?

A: Higher current (44.4A) and power (1000W) ratings do not prevent substitution; they provide additional margin for transient protection. The voltage specifications remain identical (13.6V standoff, 22.5V clamping). Use 1KSMB16A when circuit design requires enhanced energy absorption capability.

Q: Can SMBJ16A be used instead of P6SMB16AT3G?

A: No. SMBJ16A has different voltage specifications (16V standoff, 26V clamping) and uses a different package (DO-214AC, SMA). These differences make it incompatible with designs specified for P6SMB16AT3G.

Q: What packaging formats are compatible?

A: DO-214AA and SMB designations are functionally equivalent and interchangeable in surface mount applications. DO-214AC (SMA) is a different package format and is not compatible with SMB footprints.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry RoHS3 compliance certification, meeting environmental and material restriction requirements.

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