SMBJ43C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ43C-E3/52 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-E3/52 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal specifications while meeting the same packaging and compliance standards.

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-E3/52 is determined by strict adherence to the following electrical and mechanical 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): Parts with 76.7V maximum clamping voltage at peak pulse current, providing direct electrical equivalence to the original part.

Category B (Alternative Clamping Voltage): Parts with 69.4V maximum clamping voltage at peak pulse current, offering functional substitution with lower clamping performance but maintaining all other critical parameters.

All substitute parts maintain the same 43V reverse standoff voltage, 47.8V minimum breakdown voltage, 600W peak pulse power rating, and surface-mount DO-214AA/SMB package configuration.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Product Status
SMBJ43C-E3/52	Vishay General Semiconductor	43V	47.8V	76.7V	7.8A	600W	-55°C ~ 150°C	Obsolete
SMBJ43CE3/TR13	Microchip Technology	43V	47.8V	76.7V	7.8A	600W	-65°C ~ 150°C	Active
SMBJ43CA-E3/52	Vishay General Semiconductor	43V	47.8V	69.4V	8.6A	600W	-55°C ~ 150°C	Active
SMBJ43CA-13-F	Diodes Incorporated	43V	47.8V	69.4V	8.6A	600W	-55°C ~ 150°C	Active
SMBJ43CA	MDD	43V	47.8V	69.4V	8.7A	600W	-50°C ~ 150°C	Active
SMBJ43CA-HRA	Littelfuse Inc.	43V	47.8V	69.4V	8.7A	600W	-65°C ~ 150°C	Active
SMBJ43CA-TP	Micro Commercial Co	43V	47.8V	69.4V	8.6A	600W	-55°C ~ 175°C	Active

Engineering Selection Recommendations

Primary Substitute (Matched Performance): SMBJ43CE3/TR13 (Microchip Technology) provides direct electrical equivalence with identical 76.7V clamping voltage and 7.8A peak pulse current. This part is active in production and ROHS3 compliant. The extended operating temperature range (-65°C ~ 150°C) offers improved thermal margin compared to the original part.

Secondary Substitutes (Alternative Performance): SMBJ43CA-E3/52 (Vishay General Semiconductor), SMBJ43CA-13-F (Diodes Incorporated), SMBJ43CA (MDD), SMBJ43CA-HRA (Littelfuse Inc.), and SMBJ43CA-TP (Micro Commercial Co) are all active, ROHS3-compliant alternatives with 69.4V clamping voltage. These parts maintain the 43V reverse standoff voltage and 47.8V breakdown voltage specifications. Selection among these alternatives depends on operating temperature requirements and supply chain availability.

SMBJ43CA-TP offers the widest operating temperature range (-55°C ~ 175°C), suitable for high-temperature applications. SMBJ43CA-HRA provides extended low-temperature performance (-65°C ~ 150°C). All secondary substitutes are MSL 1 rated and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can SMBJ43CA variants directly replace SMBJ43C-E3/52? A: SMBJ43CA variants maintain the same 43V reverse standoff voltage, 47.8V breakdown voltage, and DO-214AA/SMB package. However, they feature 69.4V clamping voltage compared to the original 76.7V. This represents a functional substitution suitable for applications where lower clamping voltage is acceptable. Verify circuit requirements before selection.

Q: What is the difference between Category A and Category B substitutes? A: Category A substitutes (SMBJ43CE3/TR13) match the original 76.7V clamping voltage specification exactly. Category B substitutes (SMBJ43CA variants) provide 69.4V clamping voltage with higher peak pulse current (8.6A–8.7A versus 7.8A). Both categories maintain identical reverse standoff and breakdown voltages.

Q: Are all substitute parts compatible with the original PCB footprint? A: Yes. All substitute parts use the DO-214AA/SMB package in surface-mount configuration, ensuring mechanical and electrical compatibility with existing PCB layouts designed for SMBJ43C-E3/52.

Q: Which substitute offers the best thermal performance? A: SMBJ43CA-TP (Micro Commercial Co) supports the widest operating temperature range (-55°C ~ 175°C), providing superior thermal margin for high-temperature environments. SMBJ43CA-HRA (Littelfuse Inc.) extends low-temperature performance to -65°C.

Q: Are all substitutes RoHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 rating and REACH unaffected status, meeting current environmental and regulatory requirements.

Q: What is the recommended substitute for new designs? A: SMBJ43CE3/TR13 (Microchip Technology) is recommended for new designs requiring matched electrical performance. For cost-optimized designs where lower clamping voltage is acceptable, SMBJ43CA-13-F (Diodes Incorporated) or SMBJ43CA-TP (Micro Commercial Co) provide active production status with high inventory availability.

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