SMBJ22A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ22A-M3/52 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AA (SMB) package and provides 22V reverse standoff protection with a 35.5V maximum clamping voltage. The part is classified as Active status and is designed for general-purpose transient voltage suppression applications. Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the TVS diode category.

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
Type	Zener	-
Unidirectional Channels	1	-
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-55°C ~ 150°C	TJ
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ22A-M3/52 are classified into two categories based on electrical parameter matching:

Category 1: Direct Electrical Equivalents Parts that match all critical electrical parameters: 22V reverse standoff voltage, 24.4V minimum breakdown voltage, 35.5V maximum clamping voltage, 16.9A peak pulse current, and 600W peak pulse power. These parts maintain identical functional performance and are interchangeable at the circuit level. Substitutes in this category include SMBJ22A-E3/52 (Vishay), SMBJ22A (Meritek), SMBJ22A-13-F (Diodes Incorporated), SMBJ22A-TP (Micro Commercial Co), and SZ1SMB22AT3G (onsemi).

Category 2: Related Voltage Ratings Parts with different voltage ratings but same package and power rating. SMBJ20A features a 20V reverse standoff with 32.4V clamping voltage and 18.5A peak pulse current. SMBJ24A features a 24V reverse standoff with 38.9V clamping voltage and 15.5A peak pulse current. These are not direct substitutes but represent the voltage rating family within the SMB package.

Substitution eligibility is determined strictly by matching: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current, power rating, package type (DO-214AA/SMB), mounting type (surface mount), and unidirectional channel configuration (1 channel).

Parameter Comparison

Part Number	Manufacturer	Vwm (V)	Vbr (Min) (V)	Vc (Max) (V)	Ipp (A)	Ppk (W)	Package	Temp Range (°C)	Status
SMBJ22A-M3/52	Vishay	22	24.4	35.5	16.9	600	DO-214AA	-55 ~ 150	Active
SMBJ22A-E3/52	Vishay	22	24.4	35.5	16.9	600	DO-214AA	-55 ~ 150	Active
SMBJ22A	Meritek	22	24.4	35.5	16.9	600	DO-214AA	-55 ~ 150	Active
SMBJ22A-13-F	Diodes Incorporated	22	24.4	35.5	16.9	600	DO-214AA	-55 ~ 150	Active
SMBJ22A-TP	Micro Commercial Co	22	24.4	35.5	16.9	600	DO-214AA	-55 ~ 175	Active
SZ1SMB22AT3G	onsemi	22	24.4	35.5	16.9	600	DO-214AA	-65 ~ 150	Active
SMBJ20A	Good-Ark Semiconductor	20	22.2	32.4	18.5	600	DO-214AA	-55 ~ 150	Active
SMBJ24A	MDD	24	26.7	38.9	15.5	600	DO-214AA	-50 ~ 150	Active

Engineering Selection Recommendations

Direct Substitutes (Electrically Equivalent)

SMBJ22A-E3/52, SMBJ22A (Meritek), SMBJ22A-13-F, SMBJ22A-TP, and SZ1SMB22AT3G are direct electrical equivalents to SMBJ22A-M3/52. All maintain identical voltage ratings, current ratings, and power dissipation specifications. All substitute parts are Active status and ROHS3 compliant. Selection among these equivalents is determined by packaging availability (tape & reel, cut tape, or bulk), inventory levels, and lead time requirements.

SZ1SMB22AT3G from onsemi includes AEC-Q101 automotive qualification and operates across an extended temperature range (-65°C to 150°C), making it suitable for automotive applications requiring higher reliability standards.

SMBJ22A-TP from Micro Commercial Co extends the upper operating temperature to 175°C, providing thermal margin for applications in elevated ambient conditions.

Related Voltage Ratings (Not Direct Substitutes)

SMBJ20A and SMBJ24A are not direct substitutes due to different voltage ratings. SMBJ20A operates at 20V reverse standoff with lower clamping voltage (32.4V) and higher peak pulse current (18.5A). SMBJ24A operates at 24V reverse standoff with higher clamping voltage (38.9V) and lower peak pulse current (15.5A). These parts are used only when circuit design specifically requires different voltage protection levels.

Frequently Asked Questions (FAQ)

Q: Can SMBJ22A-E3/52 replace SMBJ22A-M3/52 directly?

A: Yes. Both parts are manufactured by Vishay and share identical electrical specifications: 22V reverse standoff, 24.4V breakdown voltage, 35.5V clamping voltage, 16.9A peak pulse current, and 600W power rating. The difference is packaging format (E3/52 is cut tape & Digi-Reel versus M3/52 tape & reel). Electrical performance is identical.

Q: What is the difference between SMBJ22A from different manufacturers?

A: SMBJ22A parts from Meritek, Diodes Incorporated (SMBJ22A-13-F), and Micro Commercial Co (SMBJ22A-TP) all meet the same electrical specifications as the Vishay SMBJ22A-M3/52. Differences exist in packaging options, temperature ranges, and manufacturer certifications. All are Active status and ROHS3 compliant.

Q: Can SMBJ20A or SMBJ24A be used instead of SMBJ22A-M3/52?

A: No. SMBJ20A and SMBJ24A have different voltage ratings and are not direct substitutes. SMBJ20A provides 20V protection with 32.4V clamping, while SMBJ24A provides 24V protection with 38.9V clamping. Use these only when circuit design requires different voltage protection levels.

Q: What does the packaging designation mean (M3/52 vs E3/52)?

A: M3/52 indicates tape & reel packaging, while E3/52 indicates cut tape & Digi-Reel packaging. Both are surface mount DO-214AA packages suitable for automated assembly. Selection depends on production volume and assembly equipment compatibility.

Q: Is SZ1SMB22AT3G suitable for automotive applications?

A: Yes. SZ1SMB22AT3G from onsemi carries AEC-Q101 automotive qualification and operates across -65°C to 150°C, meeting automotive reliability standards. It is electrically equivalent to SMBJ22A-M3/52 with enhanced qualification for automotive use.

Q: What is the moisture sensitivity level, and why does it matter?

A: All listed parts have MSL 1 (Unlimited), meaning they have unlimited shelf life and require no special moisture control during storage or handling. This simplifies inventory management and reduces risk of component degradation.

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