SMBJ33C-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ33C-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 33V reverse standoff voltage and provides 59V maximum clamping voltage at peak pulse current. The SMBJ33C-E3/52 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ33C-E3/52
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Product Status	Obsolete
Type	Zener
Voltage - Reverse Standoff (Typ)	33V
Voltage - Breakdown (Min)	36.7V
Voltage - Clamping (Max) @ Ipp	59V
Current - Peak Pulse (10/1000µs)	10.2A
Power - Peak Pulse	600W
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMBJ33C-E3/52 is determined by the following electrical and mechanical parameters:

Voltage - Reverse Standoff: 33V (required match)
Voltage - Breakdown (Min): 36.7V (required match)
Bidirectional Channels: 1 (required match)
Type: Zener (required match)
Mounting Type: Surface Mount (required match)
Package / Case: DO-214AA, SMB (required match)
RoHS Status: ROHS3 Compliant (required match)
MSL: 1 (Unlimited) (required match)

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

Category A - Direct Electrical Equivalents (59V Clamping): Parts with identical clamping voltage (59V @ Ipp) and peak pulse current (10.2A), maintaining exact electrical performance characteristics.

Category B - Functional Equivalents (53.3V Clamping): Parts with lower clamping voltage (53.3V @ Ipp) and higher peak pulse current (11.3A), providing improved transient suppression performance while maintaining the same reverse standoff and breakdown voltage specifications.

Parameter Comparison

Part Number	Manufacturer	Product Status	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Operating Temperature	Package / Case
SMBJ33C-E3/52	Vishay General Semiconductor - Diodes Division	Obsolete	33V	36.7V	59V	10.2A	-55°C ~ 150°C	DO-214AA, SMB
SMBJ33CA-E3/52	Vishay General Semiconductor - Diodes Division	Active	33V	36.7V	53.3V	11.3A	-55°C ~ 150°C	DO-214AA, SMB
SMBJ33CE3/TR13	Microchip Technology	Active	33V	36.7V	59V	10.2A	-65°C ~ 150°C	DO-214AA, SMB
SMBJ33CA-HRA	Littelfuse Inc.	Active	33V	36.7V	53.3V	11.3A	-65°C ~ 150°C	DO-214AA, SMB
1SMB33CA TR13 PBFREE	Central Semiconductor Corp	Active	33V	36.7V	53.3V	11.3A	-65°C ~ 150°C	DO-214AA, SMB
SMBJ33CA	MDD	Active	33V	36.7V	53.3V	11.3A	-50°C ~ 150°C	DO-214AA, SMB
SMBJ33CA-13-F	Diodes Incorporated	Active	33V	36.7V	53.3V	11.3A	-55°C ~ 150°C	DO-214AA, SMB
SMBJ33CA-TP	Micro Commercial Co	Active	33V	36.7V	53.3V	11.3A	-55°C ~ 175°C	DO-214AA, SMB

Engineering Selection Recommendations

All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the original SMBJ33C-E3/52 specifications. All substitute parts maintain active product status, ensuring long-term availability and supply chain continuity.

For applications requiring exact electrical performance matching (59V clamping, 10.2A peak pulse current), select SMBJ33CE3/TR13 from Microchip Technology. This part provides direct electrical equivalence while offering extended operating temperature range (-65°C to 150°C) and active product status.

For applications where improved transient suppression performance is acceptable, substitute parts with 53.3V clamping voltage and 11.3A peak pulse current provide enhanced protection margins. SMBJ33CA-TP from Micro Commercial Co offers the widest operating temperature range (-55°C to 175°C), while SMBJ33CA-HRA from Littelfuse Inc. and 1SMB33CA TR13 PBFREE from Central Semiconductor Corp provide extended low-temperature operation (-65°C).

Frequently Asked Questions (FAQ)

Q: Can SMBJ33CA-E3/52 replace SMBJ33C-E3/52 directly?

A: Yes. SMBJ33CA-E3/52 is manufactured by the same supplier (Vishay General Semiconductor - Diodes Division) and maintains identical reverse standoff voltage (33V), breakdown voltage (36.7V), and package specifications (DO-214AA, SMB). The clamping voltage is lower (53.3V vs 59V) and peak pulse current is higher (11.3A vs 10.2A), providing improved transient suppression performance.

Q: What is the difference between 59V clamping and 53.3V clamping variants?

A: Both variants maintain the same 33V reverse standoff voltage and 36.7V minimum breakdown voltage. The 59V clamping variant (SMBJ33C-E3/52, SMBJ33CE3/TR13) limits transient voltage to 59V at 10.2A peak pulse current. The 53.3V clamping variant limits transient voltage to 53.3V at 11.3A peak pulse current, providing lower clamping voltage and higher current handling capability for enhanced protection.

Q: Are all substitute parts available in DO-214AA (SMB) package?

A: Yes. All listed substitute parts are specified for DO-214AA, SMB surface-mount package, ensuring mechanical and electrical compatibility with the original SMBJ33C-E3/52 footprint.

Q: What is the significance of product status (Active vs Obsolete)?

A: The original SMBJ33C-E3/52 is classified as obsolete, indicating discontinued manufacturing and limited future availability. All substitute parts listed maintain active product status, ensuring continued manufacturing, supply chain availability, and technical support from their respective manufacturers.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the environmental and regulatory compliance specifications of the original SMBJ33C-E3/52.

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