SMBJ90A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ90A-M3/5B is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface-mount component operates in the 90V reverse standoff voltage class and is designed for general-purpose transient protection applications. The part is active and in production, with RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AA (SMB) package family.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	90	V
Voltage - Breakdown (Min)	100	V
Voltage - Clamping (Max) @ Ipp	146	V
Current - Peak Pulse (10/1000µs)	4.1	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

Substitute parts for the SMBJ90A-M3/5B are classified into two categories based on electrical parameter matching:

Category 1: Direct Electrical Equivalents Parts that match all critical electrical parameters: 90V reverse standoff voltage, 100V minimum breakdown voltage, 146V maximum clamping voltage, 4.1A peak pulse current, and 600W peak pulse power. These parts maintain identical transient protection performance and are interchangeable at the circuit level. Packaging variations (Tape & Reel vs. Cut Tape) do not affect electrical performance.

SMBJ90A-E3/52 (Vishay General Semiconductor - Diodes Division)
SMBJ90A (MDD)
SMBJ90A-13-F (Diodes Incorporated)

Category 2: Voltage-Reduced Alternative The SMBJ78A operates at a lower voltage class (78V reverse standoff, 126V clamping) and is suitable only for applications with lower transient voltage requirements. This part is not a direct substitute but represents an alternative for circuits designed to operate at reduced voltage protection levels.

SMBJ78A (MDD)

Parameter Comparison

Parameter	SMBJ90A-M3/5B (Main)	SMBJ90A-E3/52	SMBJ90A (MDD)	SMBJ90A-13-F	SMBJ78A
Manufacturer	Vishay	Vishay	MDD	Diodes Inc.	MDD
Voltage - Reverse Standoff (Typ)	90V	90V	90V	90V	78V
Voltage - Breakdown (Min)	100V	100V	100V	100V	86.7V
Voltage - Clamping (Max) @ Ipp	146V	146V	146V	146V	126V
Current - Peak Pulse (10/1000µs)	4.1A	4.1A	4.1A	4.1A	4.8A
Power - Peak Pulse	600W	600W	600W	600W	600W
Operating Temperature Range	-55 to 150°C	-55 to 150°C	-50 to 150°C	-55 to 150°C	-50 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Substitution (90V Class Protection): SMBJ90A-E3/52, SMBJ90A (MDD), and SMBJ90A-13-F are electrically equivalent to SMBJ90A-M3/5B. All three maintain identical voltage protection characteristics and peak pulse ratings. Selection among these equivalents may be based on packaging availability (Tape & Reel vs. Cut Tape), manufacturer preference, or inventory status. All parts carry ROHS3 compliance and MSL 1 rating, meeting the same regulatory and environmental requirements.

For Reduced Voltage Applications: SMBJ78A operates at 78V reverse standoff voltage with 126V clamping voltage. This part is suitable only for circuits where lower transient voltage protection is acceptable. The increased peak pulse current (4.8A vs. 4.1A) does not compensate for the reduced voltage rating and should not be used as a substitute in applications requiring 90V protection.

Temperature Considerations: SMBJ90A-M3/5B and SMBJ90A-13-F support -55°C minimum operating temperature, while SMBJ90A (MDD) and SMBJ78A support -50°C minimum. For applications requiring full -55°C operation, select SMBJ90A-E3/52, SMBJ90A-13-F, or maintain the original SMBJ90A-M3/5B.

Frequently Asked Questions (FAQ)

Q: Can SMBJ90A-E3/52 replace SMBJ90A-M3/5B directly? A: Yes. Both parts share identical electrical parameters: 90V reverse standoff, 100V breakdown, 146V clamping, and 4.1A peak pulse current. The difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel), which does not affect circuit performance.

Q: What is the difference between SMBJ90A from different manufacturers? A: The SMBJ90A designation from Vishay, MDD, and Diodes Incorporated all meet the same electrical specifications for the 90V class. Differences exist in minimum operating temperature (-55°C for Vishay and Diodes vs. -50°C for MDD) and packaging options. Verify temperature requirements for your application.

Q: Why is SMBJ78A listed as a substitute if it has different voltage ratings? A: SMBJ78A is not a direct substitute but an alternative for applications designed to operate at lower transient voltage protection levels (78V standoff vs. 90V). It should only be selected if your circuit design explicitly allows for reduced voltage protection.

Q: Are all substitute parts in the same DO-214AA package? A: Yes. All listed parts use the DO-214AA (SMB) surface-mount package, ensuring mechanical and footprint compatibility on PCBs designed for SMBJ90A-M3/5B.

Q: Do all substitute parts meet RoHS3 compliance? A: Yes. All equivalent and substitute parts listed carry ROHS3 Compliant status and MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's regulatory compliance.

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