SMBJ64A-M3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ64A-M3/5B 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 is designed for general-purpose transient voltage protection applications. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters within the SMBJ series, enabling component sourcing flexibility while maintaining circuit protection specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	64	V
Voltage - Breakdown (Min)	71.7	V
Voltage - Clamping (Max) @ Ipp	103	V
Current - Peak Pulse (10/1000µs)	5.8	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 SMBJ64A-M3/5B are classified based on electrical parameter compatibility within the SMBJ TVS diode series. The primary substitution criteria are:

Critical Parameters for Substitution:

Reverse standoff voltage: 64V nominal
Clamping voltage range: 102–103V maximum
Peak pulse current: 5.3–5.88A
Peak pulse power: 600W
Package: DO-214AA (SMB) surface mount
Operating temperature: -55°C to 150°C or -50°C to 150°C
RoHS3 compliance and MSL 1 rating

Substitution Categories:

Direct Equivalents – Identical reverse standoff voltage (64V) with clamping voltage 102–103V and peak pulse current 5.8–5.88A. These parts are interchangeable without circuit redesign.

Functional Alternatives – Parts with higher reverse standoff voltage (70V, 75V) that provide increased protection margin. These require circuit evaluation to confirm compatibility with the protected circuit's voltage specifications.

Parameter Comparison

Part Number	Manufacturer	Reverse Standoff (V)	Breakdown Min (V)	Clamping Max @ Ipp (V)	Peak Pulse Current (A)	Peak Pulse Power (W)	Operating Temp (°C)	Package	RoHS3
SMBJ64A-M3/5B	Vishay	64	71.7	103	5.8	600	-55 to 150	DO-214AA (SMB)	Yes
SMBJ64D-M3/I	Vishay	64	72.2	102	5.88	600	-55 to 150	DO-214AA (SMB)	Yes
SMBJ64A	Meritek	64	71.1	103	5.83	600	-55 to 150	DO-214AA (SMB)	Yes
SMBJ64A-13-F	Diodes Incorporated	64	71.1	103	5.8	600	-55 to 150	DO-214AA (SMB)	Yes
SMBJ70A	MDD	70	77.8	113	5.3	600	-50 to 150	DO-214AA (SMB)	Yes
SMBJ75A	Meritek	75	83.3	121	4.96	600	-55 to 150	DO-214AA (SMB)	Yes

Engineering Selection Recommendations

Direct Substitution (No Circuit Redesign Required):

SMBJ64D-M3/I, SMBJ64A (Meritek), and SMBJ64A-13-F (Diodes Incorporated) are direct substitutes for SMBJ64A-M3/5B. All maintain 64V reverse standoff voltage, 102–103V clamping voltage, and 5.8–5.88A peak pulse current. All are RoHS3 compliant with MSL 1 rating and operate across -55°C to 150°C. These parts are functionally equivalent and can be used interchangeably in the same circuit application.

Functional Alternatives (Circuit Evaluation Required):

SMBJ70A and SMBJ75A provide higher reverse standoff voltages (70V and 75V respectively) with correspondingly higher clamping voltages (113V and 121V). These parts offer increased transient protection margin but require verification that the protected circuit can tolerate the higher clamping voltage without performance degradation. Both maintain 600W peak pulse power and RoHS3 compliance. SMBJ70A operates at -50°C to 150°C (versus -55°C minimum for the main part).

All substitute parts are active production status with full regulatory compliance (RoHS3, REACH unaffected, EAR99 classification).

Frequently Asked Questions (FAQ)

Q: Can SMBJ64D-M3/I replace SMBJ64A-M3/5B directly?

A: Yes. Both parts share identical 64V reverse standoff voltage, 102–103V clamping voltage range, and 5.8–5.88A peak pulse current specifications. The primary difference is the manufacturer (Vishay) and internal device designation. No circuit modifications are required.

Q: What is the difference between SMBJ64A from different manufacturers?

A: SMBJ64A is available from Meritek and Diodes Incorporated (as SMBJ64A-13-F). All versions maintain the same electrical specifications: 64V reverse standoff, 103V clamping, and 5.8–5.83A peak pulse current. Manufacturer differences relate to internal process technology and packaging variants, but electrical performance is equivalent.

Q: Can I use SMBJ70A or SMBJ75A as substitutes?

A: SMBJ70A and SMBJ75A are functional alternatives, not direct substitutes. They provide higher reverse standoff voltages (70V and 75V) and higher clamping voltages (113V and 121V). Use these only if the protected circuit can tolerate the increased clamping voltage. Verify circuit performance before implementation.

Q: Are all substitute parts in the same package?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package. They are mechanically and electrically compatible with the same PCB footprint and reflow soldering process.

Q: What compliance certifications apply to substitute parts?

A: All substitute parts are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity). REACH status is unaffected for all parts. ECCN classification is EAR99 for all variants.

Q: Does operating temperature range affect substitution?

A: SMBJ70A operates at -50°C to 150°C, while SMBJ64A-M3/5B and most other substitutes operate at -55°C to 150°C. If the application requires operation below -50°C, SMBJ70A is not suitable. Other substitutes maintain the full -55°C to 150°C range.

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