1SMB16CAT3 Equivalent & Substitute Parts

Part Overview

The 1SMB16CAT3 is a 16V Zener transient voltage suppressor (TVS) diode manufactured by onsemi in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 26V maximum clamping voltage and 23.1A peak pulse current capability. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
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
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Operating Temperature Range	-65°C ~ 150°C (TJ)
Type	Zener
Bidirectional Channels	1

Substitute Part Grouping Explanation

Substitute parts for the 1SMB16CAT3 are qualified based on the following critical parameters:

Voltage - Reverse Standoff: 16V (exact match required)
Voltage - Breakdown (Min): 17.8V (exact match required)
Voltage - Clamping (Max) @ Ipp: 26V nominal (26V to 28.8V acceptable within TVS design tolerance)
Current - Peak Pulse (10/1000µs): 23.1A nominal (20.8A to 23.1A acceptable)
Power - Peak Pulse: 600W (exact match required)
Package / Case: DO-214AA, SMB (exact match required)
Mounting Type: Surface Mount (exact match required)
Type: Zener, Bidirectional, 1 Channel (exact match required)

Parts meeting these criteria are classified as direct equivalents. Parts with clamping voltage variations (28.8V) or minor current deviations are classified as similar equivalents with noted parameter differences.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Package	RoHS Status
1SMB16CAT3	onsemi	Obsolete	16V	17.8V	26V	23.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	RoHS non-compliant
SMBJ16CA	EVVO Semi	Active	16V	17.8V	26V	23.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ16CA-13-F	Diodes Incorporated	Active	16V	17.8V	26V	23.1A	600W	-55°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ16CA-HR	Littelfuse Inc.	Active	16V	17.8V	26V	23.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ16CA-HRA	Littelfuse	Active	16V	17.8V	26V	23.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ16CA-TP	Micro Commercial Co	Active	16V	17.8V	26V	23.1A	600W	-55°C ~ 175°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ16CAE3/TR13	Microchip Technology	Active	16V	17.8V	26V	23.1A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
SMBJ16CE3/TR13	Microchip Technology	Active	16V	17.8V	28.8V	20.8A	600W	-65°C ~ 150°C	DO-214AA, SMB	ROHS3 Compliant
TV06B160JB-G	Comchip Technology	Active	16V	17.8V	26V	23.08A	600W	Not specified	DO-214AA, SMB	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Choices):

SMBJ16CA (EVVO Semi), SMBJ16CA-HR (Littelfuse Inc.), SMBJ16CA-HRA (Littelfuse), SMBJ16CAE3/TR13 (Microchip Technology), and TV06B160JB-G (Comchip Technology) provide complete electrical and mechanical equivalence to the 1SMB16CAT3. All substitute parts are in active production status with ROHS3 compliance, addressing the obsolescence of the original component. These parts maintain identical voltage ratings, current specifications, and package geometry.

Extended Temperature Range Option:

SMBJ16CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C while maintaining all other electrical parameters. This variant is suitable for applications requiring enhanced thermal performance.

Parameter Variation Option:

SMBJ16CE3/TR13 (Microchip Technology) presents a clamping voltage of 28.8V with reduced peak pulse current of 20.8A. This variant is suitable only for applications where the higher clamping voltage is acceptable and the reduced current rating does not compromise circuit protection requirements.

Compliance Consideration:

All active substitute parts meet ROHS3 compliance requirements, whereas the original 1SMB16CAT3 is RoHS non-compliant. Selection of any active substitute part addresses regulatory compliance requirements for new designs and procurement.

Frequently Asked Questions (FAQ)

Q: Can SMBJ16CE3/TR13 be used as a direct replacement for 1SMB16CAT3?

A: SMBJ16CE3/TR13 is a similar equivalent with parameter variations. The clamping voltage is 28.8V (versus 26V) and peak pulse current is 20.8A (versus 23.1A). This part is suitable only if the application circuit design accommodates the higher clamping voltage and lower current rating.

Q: What is the difference between SMBJ16CA-TP and other SMBJ16CA variants?

A: SMBJ16CA-TP maintains identical electrical parameters but extends the upper operating temperature limit to 175°C, compared to 150°C for standard variants. Selection depends on thermal requirements of the target application.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts use the DO-214AA (SMB) surface mount package with identical footprint and pin configuration, ensuring direct PCB compatibility without layout modifications.

Q: Why is the original 1SMB16CAT3 listed as obsolete?

A: The 1SMB16CAT3 is obsolete in the manufacturer's product line. Active substitute parts from multiple manufacturers provide equivalent functionality with current production status and modern compliance certifications.

Q: Which substitute part offers the best compliance profile?

A: All active substitute parts meet ROHS3 compliance. Selection should be based on electrical parameter requirements, operating temperature range, and supply chain availability rather than compliance alone, as all options satisfy regulatory requirements.

Q: Can substitute parts be mixed in the same circuit board assembly?

A: Yes. All substitute parts meet identical electrical specifications for the primary application parameters (16V standoff, 26V clamping, 23.1A peak pulse). Parts may be sourced from different manufacturers within the same design without functional impact, provided the specific variant selected meets the application's temperature and current requirements.

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