SMBJ22A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ22A-M3/5B 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 is designed for general-purpose transient protection applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and package compatibility within the DO-214AA (SMB) 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
Type	Zener	-
Unidirectional Channels	1	-
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-55 to 150	°C (TJ)
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts are grouped into two categories based on electrical parameter alignment:

Category 1: Direct Electrical Equivalents (22V Standoff Class) These parts maintain identical or near-identical electrical specifications to the SMBJ22A-M3/5B:

Reverse standoff voltage: 22V
Clamping voltage: 35.1V to 35.5V
Peak pulse current: 16.9A to 17.1A
Power dissipation: 600W
Package: DO-214AA (SMB)

Parts in this category: SMBJ22A-E3/52, SMBJ22D-M3/I, SMBJ22A (Meritek), SMBJ22A-13-F, SMBJ22A-TP

Category 2: Manufacturer-Recommended Alternatives (Adjacent Voltage Classes) These parts operate in adjacent voltage classes with modified electrical characteristics:

SMBJ20A: 20V standoff class (lower voltage protection threshold)
SMBJ24A: 24V standoff class (higher voltage protection threshold)

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamp Voltage (V)	Peak Pulse Current (A)	Power (W)	Package	Temp Range (°C)	Status
SMBJ22A-M3/5B	Vishay	22	24.4	35.5	16.9	600	DO-214AA	-55 to 150	Active
SMBJ22A-E3/52	Vishay	22	24.4	35.5	16.9	600	DO-214AA	-55 to 150	Active
SMBJ22D-M3/I	Vishay	22	24.8	35.1	17.1	600	DO-214AA	-55 to 150	Active
SMBJ22A	Meritek	22	24.4	35.5	16.9	600	DO-214AA	-55 to 150	Active
SMBJ22A-13-F	Diodes Incorporated	22	24.4	35.5	16.9	600	DO-214AA	-55 to 150	Active
SMBJ22A-TP	Micro Commercial Co	22	24.4	35.5	16.9	600	DO-214AA	-55 to 175	Active
SMBJ20A	Good-Ark Semiconductor	20	22.2	32.4	18.5	600	DO-214AA	-55 to 150	Active
SMBJ24A	MDD	24	26.7	38.9	15.5	600	DO-214AA	-50 to 150	Active

Engineering Selection Recommendations

Direct Substitution (Same Voltage Class): SMBJ22A-E3/52, SMBJ22D-M3/I, SMBJ22A (Meritek), SMBJ22A-13-F, and SMBJ22A-TP are electrically equivalent to SMBJ22A-M3/5B. All parts maintain 22V reverse standoff voltage, 600W peak pulse power, and DO-214AA package compatibility. All substitute parts are active production status with ROHS3 compliance. Selection among these equivalents depends on packaging format availability (Tape & Reel vs. Cut Tape) and inventory requirements.

Alternative Voltage Classes (Manufacturer-Recommended): SMBJ20A and SMBJ24A represent adjacent voltage protection classes. SMBJ20A provides lower voltage threshold protection (20V standoff) with increased peak pulse current capability (18.5A). SMBJ24A provides higher voltage threshold protection (24V standoff) with reduced peak pulse current (15.5A). These alternatives are suitable only when circuit design permits operation in different voltage protection bands.

All recommended parts maintain ROHS3 compliance, MSL 1 rating, and active production status.

Frequently Asked Questions (FAQ)

Q: Can SMBJ22A-E3/52 replace SMBJ22A-M3/5B directly? A: Yes. Both parts share identical electrical specifications (22V standoff, 35.5V clamp, 16.9A peak pulse) and DO-214AA package. The difference is packaging format: SMBJ22A-E3/52 is supplied in Cut Tape & Digi-Reel format, while SMBJ22A-M3/5B is Tape & Reel. Verify your assembly equipment compatibility with the packaging format.

Q: What is the difference between SMBJ22D-M3/I and SMBJ22A-M3/5B? A: Both are 22V standoff class TVS diodes in DO-214AA package. SMBJ22D-M3/I has slightly lower clamping voltage (35.1V vs. 35.5V) and marginally higher peak pulse current (17.1A vs. 16.9A). These minor variations remain within the same functional class and are electrically interchangeable for general-purpose transient protection.

Q: When should I use SMBJ20A instead of SMBJ22A-M3/5B? A: SMBJ20A operates in the 20V standoff class, providing protection threshold 2V lower than SMBJ22A-M3/5B. Use SMBJ20A only if your circuit design requires lower voltage transient suppression. SMBJ20A offers higher peak pulse current (18.5A) but lower clamping voltage (32.4V).

Q: Is SMBJ22A-TP compatible with SMBJ22A-M3/5B? A: Yes. SMBJ22A-TP is electrically identical to SMBJ22A-M3/5B with identical electrical parameters. SMBJ22A-TP has extended operating temperature range (-55°C to 175°C vs. -55°C to 150°C), making it suitable for higher temperature applications. Both use DO-214AA package.

Q: Can I use SMBJ24A as a substitute? A: SMBJ24A is a 24V standoff class device, not a direct equivalent. Use SMBJ24A only if your circuit design permits higher voltage protection threshold. SMBJ24A has higher clamping voltage (38.9V) and lower peak pulse current (15.5A) compared to SMBJ22A-M3/5B.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the compliance profile of SMBJ22A-M3/5B.

Q: What packaging formats are available for 22V standoff equivalents? A: SMBJ22A-M3/5B is supplied in Tape & Reel (TR). Equivalent parts are available in Tape & Reel (SMBJ22A-E3/52, SMBJ22D-M3/I, SMBJ22A-TP) and Cut Tape & Digi-Reel formats (SMBJ22A-13-F). Verify your assembly process requirements before selecting packaging format.

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