SMBJ15-E3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ15-E3/52 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division in the TransZorb® series. This surface mount component operates in the DO-214AA (SMB) package and is designed for general-purpose transient voltage suppression applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	15V
Voltage - Breakdown (Min)	16.7V
Voltage - Clamping (Max) @ Ipp	26.9V
Current - Peak Pulse (10/1000µs)	22.3A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the SMBJ15-E3/52 is determined by the following critical parameters:

Voltage - Reverse Standoff (Typ): 15V
Voltage - Breakdown (Min): 16.7V
Package / Case: DO-214AA, SMB (surface mount)
Unidirectional Channels: 1
Type: Zener
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Substitute parts must maintain the same reverse standoff voltage, breakdown voltage minimum, and physical package to ensure direct PCB compatibility and electrical performance equivalence. Variations in clamping voltage and peak pulse current are acceptable within the constraints of the application circuit design, provided the part remains rated for 600W peak pulse power or higher.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Operating Temperature	Package	Product Status
SMBJ15-E3/52	Vishay General Semiconductor - Diodes Division	15V	16.7V	26.9V	22.3A	600W	-55°C ~ 150°C	DO-214AA, SMB	Obsolete
SMBJ15A-E3/52	Vishay General Semiconductor - Diodes Division	15V	16.7V	24.4V	24.6A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ15E3/TR13	Microchip Technology	15V	16.7V	26.9V	22.3A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active
SACB15	Littelfuse Inc.	15V	16.7V	23.6V	20A	500W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ15A	EVVO Semi	15V	16.7V	24.4V	24.6A	600W	-65°C ~ 150°C	DO-214AC, SMA	Active
SMBJ15A-13-F	Diodes Incorporated	15V	16.7V	24.4V	24A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ15A-TP	Micro Commercial Co	15V	16.7V	24.4V	24A	600W	-55°C ~ 175°C	DO-214AA, SMB	Active
SMBJ15A-TR	STMicroelectronics	15V	16.7V	24.4V	25.1A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active

Engineering Selection Recommendations

Primary Recommendation: SMBJ15E3/TR13 (Microchip Technology)

This part provides the closest electrical match to the original SMBJ15-E3/52, with identical clamping voltage (26.9V) and peak pulse current (22.3A). It maintains DO-214AA SMB package compatibility and is ROHS3 compliant. The extended operating temperature range (-65°C ~ 150°C) provides additional thermal margin. Active product status ensures long-term availability.

Secondary Recommendation: SMBJ15A-E3/52 (Vishay General Semiconductor - Diodes Division)

This Vishay part maintains the same manufacturer lineage and package format as the original. While clamping voltage is reduced to 24.4V and peak pulse current increased to 24.6A, both remain within acceptable operating parameters for general-purpose TVS applications. Active product status and identical temperature range support direct substitution.

Alternative Recommendation: SMBJ15A-TR (STMicroelectronics)

This part offers 24.4V clamping voltage with 25.1A peak pulse current in the DO-214AA SMB package. It is ROHS3 compliant and active, with standard operating temperature range. Suitable for applications where the slightly lower clamping voltage is acceptable.

Package Consideration: SMBJ15A (EVVO Semi)

This part uses the DO-214AC SMA package instead of DO-214AA SMB. While electrically equivalent with 24.4V clamping and 24.6A peak pulse current, PCB layout modifications are required due to different package footprint. Use only if PCB redesign is feasible.

Limited Availability: SACB15 (Littelfuse Inc.)

This Littelfuse part operates at reduced peak pulse power (500W versus 600W) and lower peak pulse current (20A). It is suitable only for applications with lower transient energy requirements. REACH Affected status may impose additional compliance considerations.

Frequently Asked Questions (FAQ)

Q: Can SMBJ15A-E3/52 directly replace SMBJ15-E3/52 without circuit modification?

A: Yes. Both parts share identical reverse standoff voltage (15V), breakdown voltage (16.7V), and DO-214AA SMB package. The clamping voltage difference (24.4V versus 26.9V) and increased peak pulse current (24.6A versus 22.3A) are within acceptable substitution parameters for general-purpose TVS applications.

Q: What is the difference between DO-214AA (SMB) and DO-214AC (SMA) packages?

A: These are different physical packages with distinct PCB footprints. DO-214AA (SMB) is the original package for SMBJ15-E3/52. DO-214AC (SMA) is a smaller variant. Substitution requires PCB layout modification and is not recommended for direct replacement without design review.

Q: Why does SMBJ15E3/TR13 have a lower operating temperature minimum (-65°C versus -55°C)?

A: The extended lower temperature limit (-65°C) provides additional thermal margin and is not a limitation. This part is suitable for applications requiring wider temperature range operation.

Q: Is SACB15 a suitable substitute?

A: SACB15 operates at reduced peak pulse power (500W versus 600W) and lower peak pulse current (20A). It is suitable only for applications with lower transient energy requirements. Verify circuit transient specifications before selection.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant. SACB15 carries REACH Affected status, which may impose additional compliance documentation requirements depending on end-use jurisdiction.

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