SMBJ43A-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ43A-M3/52 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 43V reverse standoff category and is designed for general-purpose transient protection applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity level rating. Substitute parts are identified to address supply chain requirements, inventory availability, or specific packaging and thermal performance variations while maintaining electrical compatibility within the defined parameter ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	43	V
Voltage - Breakdown (Min)	47.8	V
Voltage - Clamping (Max) @ Ipp	69.4	V
Current - Peak Pulse (10/1000µs)	8.6	A
Power - Peak Pulse	600	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AA, SMB	-
Mounting Type	Surface Mount	-
Type	Zener	-
Unidirectional Channels	1	-

Substitute Part Grouping Explanation

Substitute parts for the SMBJ43A-M3/52 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 43V
Voltage - Breakdown (Min): 47.8V minimum
Voltage - Clamping (Max) @ Ipp: 69.4V maximum
Current - Peak Pulse (10/1000µs): 8.6A nominal
Power - Peak Pulse: 600W
Package / Case: DO-214AA or SMB equivalent
Mounting Type: Surface Mount
Type: Zener, Unidirectional (1 channel)
RoHS Status: ROHS3 Compliant

All substitute parts listed maintain these electrical specifications within the allowed tolerances and are packaged in compatible surface mount configurations. Variations in clamping voltage (68.5V to 69.4V) and peak pulse current (8.6A to 8.76A) remain within acceptable operating margins for general-purpose transient suppression applications.

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
SMBJ43A-M3/52	Vishay General Semiconductor	43V	47.8V	69.4V	8.6A	600W	-55 to 150°C	DO-214AA, SMB
SMBJ43D-M3/H	Vishay General Semiconductor	43V	48.5V	68.5V	8.76A	600W	-55 to 150°C	DO-214AA, SMB
SMBJ43A-E3/52	Vishay General Semiconductor	43V	47.8V	69.4V	8.6A	600W	-55 to 150°C	DO-214AA, SMB
SMBJ43A	Meritek	43V	47.8V	69.4V	8.65A	600W	-55 to 150°C	DO-214AA, SMB
SMBJ43A-13-F	Diodes Incorporated	43V	47.8V	69.4V	8.6A	600W	-55 to 150°C	DO-214AA, SMB
SMBJ43A-TP	Micro Commercial Co	43V	47.8V	69.4V	8.6A	600W	-55 to 175°C	DO-214AA, SMB

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance. Selection among equivalent parts should be based on:

Manufacturer Availability: SMBJ43A-E3/52 (Vishay) offers the highest inventory level at 18,835 pieces, providing supply chain stability. SMBJ43A-13-F (Diodes Incorporated) provides 215,300 pieces in stock, supporting high-volume applications.

Thermal Performance: SMBJ43A-TP (Micro Commercial Co) extends the operating temperature range to 175°C, compared to the standard 150°C maximum for other variants. This option is suitable for applications requiring enhanced thermal margin.

Electrical Equivalence: SMBJ43D-M3/H (Vishay) presents a minor variation with clamping voltage of 68.5V and peak pulse current of 8.76A, remaining within acceptable substitution parameters for general-purpose transient suppression.

Packaging Consistency: All parts are packaged in DO-214AA (SMB) surface mount configuration, ensuring mechanical and thermal compatibility with existing PCB layouts and reflow processes.

Frequently Asked Questions (FAQ)

Q: Can SMBJ43D-M3/H be used as a direct replacement for SMBJ43A-M3/52?

A: Yes. Both parts share the same 43V reverse standoff voltage and 600W peak pulse power rating. The SMBJ43D-M3/H exhibits a clamping voltage of 68.5V compared to 69.4V in the original part, and peak pulse current of 8.76A versus 8.6A. These variations remain within acceptable operating margins for general-purpose transient protection circuits.

Q: What is the difference between SMBJ43A-E3/52 and SMBJ43A-M3/52?

A: Both parts are manufactured by Vishay General Semiconductor and share identical electrical specifications: 43V reverse standoff, 47.8V breakdown minimum, 69.4V clamping maximum, and 8.6A peak pulse current. The difference lies in packaging designation and supplier device package coding. SMBJ43A-E3/52 is the manufacturer-recommended equivalent with significantly higher inventory availability.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All listed substitute parts use the DO-214AA (SMB) surface mount package, which maintains identical footprint dimensions and reflow soldering requirements. No PCB layout modifications are necessary for substitution.

Q: Does SMBJ43A-TP offer any performance advantage?

A: SMBJ43A-TP extends the maximum operating temperature to 175°C, compared to 150°C for other variants. This provides additional thermal headroom in high-temperature environments. Electrical performance remains equivalent across all other parameters.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level (MSL 1) rating, meeting the same environmental and regulatory requirements as the original SMBJ43A-M3/52.

Q: Can I mix different manufacturers in the same production run?

A: Yes. All substitute parts meet identical electrical specifications and package requirements. However, standard quality assurance practices recommend validating supplier documentation and conducting incoming inspection to confirm compliance with your specific application requirements.

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