SMBJ28CA-M3/52 Equivalent & Substitute Parts

Part Overview

The SMBJ28CA-M3/52 is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the 28V reverse standoff voltage class and provides transient protection for general-purpose applications. The part is Active status and ROHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and packaging specifications to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	SMBJ28CA-M3/52
Manufacturer	Vishay General Semiconductor - Diodes Division
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Bidirectional Channels	1
Voltage - Reverse Standoff (Typ)	28V
Voltage - Breakdown (Min)	31.1V
Voltage - Clamping (Max) @ Ipp	45.4V
Current - Peak Pulse (10/1000µs)	13.2A
Power - Peak Pulse	600W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AA, SMB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SMBJ28CA-M3/52 are qualified based on the following critical parameters:

Voltage - Reverse Standoff (Typ): 28V
Voltage - Breakdown (Min): 31.1V minimum
Voltage - Clamping (Max) @ Ipp: 45.4V ±1.0V tolerance
Current - Peak Pulse (10/1000µs): 13.2A minimum
Power - Peak Pulse: 600W
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener
RoHS Status: ROHS3 Compliant

All substitute parts maintain these electrical and mechanical specifications within acceptable engineering tolerances for direct circuit replacement.

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	Product Status
SMBJ28CA-M3/52	Vishay General Semiconductor - Diodes Division	28V	31.1V	45.4V	13.2A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ28CD-M3/H	Vishay General Semiconductor - Diodes Division	28V	31.6V	44.7V	13.4A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ28CA-E3/52	Vishay General Semiconductor - Diodes Division	28V	31.1V	45.5V	13.2A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ28CA	MDD	28V	31.1V	45.4V	13.3A	600W	-50°C ~ 150°C	DO-214AA, SMB	Active
SMBJ28CA-13-F	Diodes Incorporated	28V	31.1V	45.4V	13.2A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SMBJ28CA-TP	Micro Commercial Co	28V	31.1V	45.4V	13.2A	600W	-55°C ~ 175°C	DO-214AA, SMB	Active
SMBJ28CA-TR	STMicroelectronics	28V	31.1V	45.4V	13.8A	600W	-55°C ~ 150°C	DO-214AA, SMB	Active
SZ1SMB28CAT3G	Littelfuse Inc.	28V	31.1V	45.4V	13.2A	600W	-65°C ~ 150°C	DO-214AA, SMB	Active

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring regulatory and supply chain continuity. Selection among equivalents depends on specific application requirements:

SMBJ28CA-E3/52 and SMBJ28CA-13-F provide direct electrical equivalence to the primary part with identical voltage and current specifications.

SMBJ28CA-TR (STMicroelectronics) offers slightly elevated peak pulse current capability (13.8A versus 13.2A), suitable for applications requiring additional transient margin.

SMBJ28CA-TP (Micro Commercial Co) extends the upper operating temperature to 175°C, applicable in high-temperature environments.

SZ1SMB28CAT3G (Littelfuse Inc.) includes automotive-grade qualification (AEC-Q101) and extended lower temperature range (-65°C), appropriate for automotive and harsh environment applications.

SMBJ28CD-M3/H (Vishay) represents a variant with marginally different clamping voltage (44.7V) and breakdown voltage (31.6V), suitable where these specific parameters align with circuit protection requirements.

SMBJ28CA (MDD) operates within a narrower lower temperature range (-50°C minimum) and should be evaluated for cold-temperature applications.

Frequently Asked Questions (FAQ)

Q: Can SMBJ28CA-E3/52 directly replace SMBJ28CA-M3/52?

A: Yes. Both parts share identical reverse standoff voltage (28V), breakdown voltage (31.1V), clamping voltage (45.4V), and peak pulse current (13.2A). The difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel), which does not affect electrical performance.

Q: What is the difference between SMBJ28CA-M3/52 and SMBJ28CD-M3/H?

A: Both are Vishay TransZorb® series with 28V standoff voltage. SMBJ28CD-M3/H has a slightly lower clamping voltage (44.7V versus 45.4V) and higher breakdown voltage minimum (31.6V versus 31.1V). Selection depends on whether the circuit requires the specific clamping characteristic of the CD variant.

Q: Is SZ1SMB28CAT3G suitable for automotive applications?

A: Yes. SZ1SMB28CAT3G carries AEC-Q101 automotive qualification and operates across -65°C to 150°C, meeting automotive-grade requirements. It maintains all electrical specifications equivalent to the primary part.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range affects suitability for specific environments but does not prevent substitution if the application operates within the substitute part's specified range. SMBJ28CA-TP (-55°C to 175°C) and SZ1SMB28CAT3G (-65°C to 150°C) offer extended ranges for specialized applications.

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

A: Yes. All listed substitute parts use DO-214AA, SMB surface mount package, ensuring mechanical and footprint compatibility on PCB assemblies.

Q: What does peak pulse current variation (13.2A to 13.8A) mean for circuit protection?

A: Peak pulse current indicates the maximum transient current the diode can safely conduct. Higher values (SMBJ28CA-TR at 13.8A) provide additional margin for transient suppression. Selection should match or exceed the circuit's maximum transient current requirement.

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