SMBJ22A-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ22A-E3/5B is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 22V reverse standoff voltage class and provides transient protection for general-purpose applications. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when electrical parameters and mechanical compatibility align within specified tolerances for the DO-214AA (SMB) package form factor.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	22	V
Voltage - Breakdown (Min)	24.4	V
Voltage - Clamping (Max) @ Ipp	35.5	V
Current - Peak Pulse (10/1000µs)	16.9	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ22A-E3/5B is determined by the following criteria:

Primary Electrical Parameters:

Voltage - Reverse Standoff (Typ): 22V
Voltage - Breakdown (Min): 24.4V minimum
Voltage - Clamping (Max) @ Ipp: 35.1V to 35.5V range
Current - Peak Pulse (10/1000µs): 16.9A to 17.7A range
Power - Peak Pulse: 600W

Mechanical Compatibility:

Package / Case: DO-214AA (SMB)
Mounting Type: Surface Mount
Unidirectional Channels: 1

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
Product Status: Active

Parts meeting these criteria within specified tolerances are classified as direct substitutes. Parts with voltage or current parameters outside these ranges are classified as alternative options with noted parameter differences.

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	RoHS Status
SMBJ22A-E3/5B	Vishay General Semiconductor	22V	24.4V	35.5V	16.9A	600W	-55 to 150°C	DO-214AA (SMB)	ROHS3
SMBJ22D-M3/I	Vishay General Semiconductor	22V	24.8V	35.1V	17.1A	600W	-55 to 150°C	DO-214AA (SMB)	ROHS3
SMBJ22A	Meritek	22V	24.4V	35.5V	16.9A	600W	-55 to 150°C	DO-214AA (SMB)	ROHS3
SMBJ22A-13-F	Diodes Incorporated	22V	24.4V	35.5V	16.9A	600W	-55 to 150°C	DO-214AA (SMB)	ROHS3
SMBJ22A-TP	Micro Commercial Co	22V	24.4V	35.5V	16.9A	600W	-55 to 175°C	DO-214AA (SMB)	ROHS3
SACB22	Littelfuse Inc.	22V	24.4V	35.4V	14A	500W	-55 to 150°C	DO-214AA (SMB)	ROHS3
SMBJ22A-TR	STMicroelectronics	22V	24.4V	35.5V	17.7A	600W	-55 to 150°C	DO-214AA (SMB)	ROHS3
SZ1SMB22AT3G	onsemi	22V	24.4V	35.5V	16.9A	600W	-65 to 150°C	DO-214AA (SMB)	ROHS3

Engineering Selection Recommendations

Direct Substitutes (Identical Electrical Performance):

SMBJ22A (Meritek), SMBJ22A-13-F (Diodes Incorporated), SMBJ22A-TP (Micro Commercial Co), and SMBJ22A-TR (STMicroelectronics) are direct substitutes with matching voltage standoff, breakdown, clamping, and current specifications. All maintain 600W peak pulse power and ROHS3 compliance. SMBJ22A-TP offers extended operating temperature to 175°C. SZ1SMB22AT3G (onsemi) provides identical electrical parameters with extended lower temperature range to -65°C and includes AEC-Q101 automotive qualification.

Near-Equivalent Substitute (Minor Parameter Variance):

SMBJ22D-M3/I (Vishay General Semiconductor) maintains the 22V standoff class with slightly higher breakdown voltage (24.8V) and marginally higher peak pulse current (17.1A). Clamping voltage is 35.1V, within acceptable tolerance. This part is suitable where minor parameter variations are acceptable.

Alternative Option (Reduced Performance):

SACB22 (Littelfuse Inc.) operates at the same 22V standoff voltage with comparable clamping voltage (35.4V) but delivers reduced peak pulse current (14A) and lower peak pulse power (500W). This part is suitable only for applications with lower transient current requirements.

Not Recommended:

SM6T27A (STMicroelectronics) operates at 23.1V reverse standoff voltage, outside the 22V class specification, and is not suitable as a substitute.

Frequently Asked Questions (FAQ)

Q: Can SMBJ22A-E3/5B be replaced with SACB22?

A: SACB22 is an alternative option with reduced specifications. It maintains the 22V standoff voltage and similar clamping voltage but provides only 14A peak pulse current versus 16.9A, and 500W peak pulse power versus 600W. Use only if your application requires less than 14A transient current.

Q: What is the difference between SMBJ22A-TP and SMBJ22A-E3/5B?

A: SMBJ22A-TP is a direct electrical substitute with identical voltage and current specifications. The primary difference is extended operating temperature range (-55 to 175°C versus -55 to 150°C). Both use DO-214AA (SMB) packaging and are ROHS3 compliant.

Q: Is SZ1SMB22AT3G suitable for automotive applications?

A: SZ1SMB22AT3G carries AEC-Q101 automotive qualification and is suitable for automotive-grade applications. It provides identical electrical performance to SMBJ22A-E3/5B with extended lower temperature range (-65°C).

Q: Do all substitute parts use the same DO-214AA package?

A: All listed substitute parts use DO-214AA (SMB) surface mount packaging, ensuring mechanical compatibility with SMBJ22A-E3/5B in PCB layouts.

Q: What is the key parameter that determines substitution eligibility?

A: The 22V reverse standoff voltage class is the primary determinant. Secondary criteria include breakdown voltage (24.4V minimum), clamping voltage (35.1V to 35.5V), and peak pulse current (14A to 17.7A). All substitutes must maintain DO-214AA packaging and ROHS3 compliance.

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