1SMB16AT3G Equivalent & Substitute Parts

Part Overview

The 1SMB16AT3G is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 16V reverse standoff voltage and 26V maximum clamping voltage. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	1SMB16AT3G
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	16V
Voltage - Breakdown (Min)	17.8V
Voltage - Clamping (Max) @ Ipp	26V
Current - Peak Pulse (10/1000µs)	23.1A
Power - Peak Pulse	600W
Operating Temperature Range	-65°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the 1SMB16AT3G are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 16V
Voltage - Breakdown (Min): 17.8V
Voltage - Clamping (Max) @ Ipp: 26V
Current - Peak Pulse (10/1000µs): 23.1A
Power - Peak Pulse: 600W
Type: Zener, Unidirectional
Package / Case: DO-214AA or DO-214AC (SMB or SMA)
Mounting Type: Surface Mount
Applications: General Purpose

All substitute parts listed maintain identical electrical specifications for voltage suppression performance and peak pulse handling. Package variations between DO-214AA (SMB) and DO-214AC (SMA) are mechanically compatible for the same PCB footprint application. Product status prioritizes active components to ensure long-term availability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Package	Product Status	RoHS Status
1SMB16AT3G	Littelfuse Inc.	16V	26V	23.1A	600W	DO-214AA, SMB	Obsolete	ROHS3 Compliant
SMBJ16A	EVVO Semi	16V	26V	23.1A	600W	DO-214AC, SMA	Active	ROHS3 Compliant
SMBJ16A-HR	Littelfuse Inc.	16V	26V	23.1A	600W	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ16A-HRA	Littelfuse Inc.	16V	26V	23.1A	600W	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ16A-13-F	Diodes Incorporated	16V	26V	23.1A	600W	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ16A-TP	Micro Commercial Co	16V	26V	23.1A	600W	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ16A-TR	STMicroelectronics	16V	26V	23.1A	600W	DO-214AA, SMB	Active	ROHS3 Compliant
SMBJ16AE3/TR13	Microchip Technology	16V	26V	23.1A	600W	DO-214AA, SMB	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SMBJ16A-HR or SMBJ16A-HRA (Littelfuse Inc.)

Both parts are manufactured by the original equipment supplier and maintain identical electrical specifications and DO-214AA (SMB) packaging. Active product status ensures continued availability and supply chain stability. ROHS3 compliance and REACH unaffected status match the original part requirements.

Secondary Recommendations: SMBJ16A-13-F (Diodes Incorporated), SMBJ16A-TP (Micro Commercial Co), SMBJ16A-TR (STMicroelectronics), SMBJ16AE3/TR13 (Microchip Technology)

All secondary options maintain identical electrical performance and DO-214AA (SMB) packaging with active product status and ROHS3 compliance. Selection among these alternatives depends on procurement availability and supply chain preferences.

Alternative Package Option: SMBJ16A (EVVO Semi)

This part uses DO-214AC (SMA) packaging instead of DO-214AA (SMB). While electrically equivalent, the SMA package has different mechanical dimensions. This option is suitable only if PCB layout accommodates the SMA footprint.

Frequently Asked Questions (FAQ)

Q: Can I use SMBJ16A (EVVO Semi) as a direct replacement for 1SMB16AT3G?

A: SMBJ16A is electrically equivalent with identical voltage and current ratings. However, it uses DO-214AC (SMA) packaging versus the original DO-214AA (SMB). Direct PCB substitution requires footprint compatibility verification. If your design uses SMB footprint, select SMBJ16A-HR, SMBJ16A-HRA, SMBJ16A-13-F, SMBJ16A-TP, SMBJ16A-TR, or SMBJ16AE3/TR13 instead.

Q: What is the difference between SMBJ16A-HR and SMBJ16A-HRA?

A: Both parts are manufactured by Littelfuse Inc. with identical electrical specifications, DO-214AA (SMB) packaging, and active product status. Both are ROHS3 compliant. Selection between them depends on packaging format availability (Tape & Reel) and supplier inventory.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitute parts listed are ROHS3 compliant, matching the original 1SMB16AT3G compliance status.

Q: Can I substitute parts with different operating temperature ranges?

A: The original 1SMB16AT3G operates from -65°C to 150°C. SMBJ16A-13-F and SMBJ16A-TP have -55°C to 150°C and -55°C to 175°C ranges respectively. Verify your application's temperature requirements before selection. For identical -65°C to 150°C range, use SMBJ16A-HR, SMBJ16A-HRA, SMBJ16A-TR, or SMBJ16AE3/TR13.

Q: Why is the original 1SMB16AT3G listed as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitute parts with identical electrical and mechanical specifications are available from multiple manufacturers to support ongoing applications.

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