SMBJ43C-E3/5B Equivalent & Substitute Parts

Part Overview

The SMBJ43C-E3/5B is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division, designed for general-purpose overvoltage protection in surface-mount applications. This part operates with a 43V reverse standoff voltage and provides 76.7V maximum clamping voltage at peak pulse current. The SMBJ43C-E3/5B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts maintain the same electrical performance envelope while offering active product status and improved availability.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	43V
Voltage - Breakdown (Min)	47.8V
Voltage - Clamping (Max) @ Ipp	76.7V
Current - Peak Pulse (10/1000µs)	7.8A
Power - Peak Pulse	600W
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

Substitution eligibility for the SMBJ43C-E3/5B is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 43V
Voltage - Breakdown (Min): 47.8V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Substitute parts are grouped into two categories based on clamping voltage performance:

Category A - Matched Clamping Voltage (76.7V): Parts with identical maximum clamping voltage at peak pulse current, providing direct electrical equivalence.

Category B - Reduced Clamping Voltage (69.4V): Parts with lower maximum clamping voltage but maintaining the same reverse standoff, breakdown voltage, and package specifications. These parts operate within the same voltage protection window while offering higher peak pulse current capability.

All substitute parts maintain DO-214AA (SMB) package compatibility, surface-mount configuration, and ROHS3 compliance.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temperature	Product Status
SMBJ43C-E3/5B	Vishay General Semiconductor - Diodes Division	43V	47.8V	76.7V	7.8A	600W	DO-214AA, SMB	-55°C ~ 150°C	Obsolete
SMBJ43CA-E3/5B	Vishay General Semiconductor - Diodes Division	43V	47.8V	69.4V	8.6A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ43CE3/TR13	Microchip Technology	43V	47.8V	76.7V	7.8A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJ43CA	MDD	43V	47.8V	69.4V	8.7A	600W	DO-214AA, SMB	-50°C ~ 150°C	Active
SMBJ43CA-13-F	Diodes Incorporated	43V	47.8V	69.4V	8.6A	600W	DO-214AA, SMB	-55°C ~ 150°C	Active
SMBJ43CA-HRA	Littelfuse Inc.	43V	47.8V	69.4V	8.7A	600W	DO-214AA, SMB	-65°C ~ 150°C	Active
SMBJ43CA-TP	Micro Commercial Co	43V	47.8V	69.4V	8.6A	600W	DO-214AA, SMB	-55°C ~ 175°C	Active

Engineering Selection Recommendations

Direct Electrical Equivalent (Matched Clamping Voltage):

SMBJ43CE3/TR13 (Microchip Technology) provides identical clamping voltage performance at 76.7V with active product status. This part extends the operating temperature range to -65°C, offering enhanced low-temperature performance compared to the original SMBJ43C-E3/5B.

Functional Equivalents (Reduced Clamping Voltage):

SMBJ43CA-E3/5B (Vishay General Semiconductor - Diodes Division), SMBJ43CA-13-F (Diodes Incorporated), SMBJ43CA-HRA (Littelfuse Inc.), and SMBJ43CA-TP (Micro Commercial Co) all maintain the 43V reverse standoff and 47.8V minimum breakdown voltage while operating at 69.4V maximum clamping voltage. These parts are ROHS3 compliant and carry active product status. SMBJ43CA-TP offers the widest operating temperature range at -55°C ~ 175°C. SMBJ43CA-HRA extends low-temperature operation to -65°C.

SMBJ43CA (MDD) provides the same electrical performance as the other 69.4V clamping variants with the highest inventory availability and active product status, though with a narrower operating temperature range of -50°C ~ 150°C.

All substitute parts maintain DO-214AA (SMB) package compatibility and ROHS3 compliance with MSL 1 rating.

Frequently Asked Questions (FAQ)

Q: Can SMBJ43CA-E3/5B replace SMBJ43C-E3/5B directly?

A: Yes. Both parts share identical reverse standoff voltage (43V), breakdown voltage (47.8V), and package specifications (DO-214AA, SMB). The SMBJ43CA-E3/5B operates at 69.4V clamping voltage versus 76.7V for the original part. This represents a 9.6% reduction in clamping voltage while maintaining the same protection threshold and offering higher peak pulse current (8.6A vs 7.8A). Both parts operate across -55°C ~ 150°C.

Q: What is the difference between 76.7V and 69.4V clamping voltage variants?

A: The 76.7V clamping voltage (SMBJ43C-E3/5B, SMBJ43CE3/TR13) provides tighter voltage regulation at peak pulse conditions. The 69.4V clamping voltage variants (SMBJ43CA series) allow slightly higher voltage transients before clamping but deliver higher peak pulse current capability (8.6A-8.7A vs 7.8A). Both maintain the same 43V reverse standoff and 47.8V breakdown specifications, making them functionally equivalent for general-purpose overvoltage protection applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMBJ43C-E3/5B specifications.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ43CA-TP (Micro Commercial Co) operates from -55°C ~ 175°C, providing the highest maximum junction temperature. SMBJ43CA-HRA (Littelfuse Inc.) and SMBJ43CE3/TR13 (Microchip Technology) extend minimum temperature to -65°C.

Q: Is packaging identical across all substitute parts?

A: Yes. All substitute parts use DO-214AA (SMB) surface-mount package with identical footprint and mounting requirements. Packaging variants (Tape & Reel vs bulk) do not affect electrical or mechanical compatibility.

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