SMBJ28E3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ28E3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component operates with a 28V reverse standoff voltage and provides 50V maximum clamping voltage at peak pulse current, with a peak pulse power rating of 600W. The device is packaged in DO-214AA (SMB) format and supplied on Tape & Reel (TR) for automated assembly.

The SMBJ28E3/TR13 is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical parameters, mechanical compatibility, and operational specifications that permit direct functional replacement in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	28	V
Voltage - Breakdown (Min)	31.1	V
Voltage - Clamping (Max) @ Ipp	50	V
Current - Peak Pulse (10/1000µs)	12	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
MSL Rating	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ28E3/TR13 are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - Reverse Standoff (Typ): 28V
Voltage - Breakdown (Min): 31.1V
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Unidirectional Channels: 1
Type: Zener
Power - Peak Pulse: 600W
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

Allowable Variation Parameters:

Voltage - Clamping (Max) @ Ipp: 45.4V to 50V (within acceptable clamp voltage range)
Current - Peak Pulse (10/1000µs): 12A to 13.8A (within acceptable peak pulse current range)
Operating Temperature Range: -65°C to -50°C minimum; 150°C to 175°C maximum

All identified substitute parts maintain identical reverse standoff voltage, breakdown voltage, package format, and compliance certifications. Variations in clamping voltage and peak pulse current remain within functional tolerance for general-purpose transient suppression applications.

Parameter Comparison

Parameter	SMBJ28E3/TR13 (Microchip)	SMBJ28A (MDD)	SMBJ28A-13-F (Diodes Inc.)	SMBJ28A-TP (Micro Commercial)	SMBJ28A-TR (STMicroelectronics)	SZ1SMB28AT3G (Littelfuse)
Voltage - Reverse Standoff (Typ)	28V	28V	28V	28V	28V	28V
Voltage - Breakdown (Min)	31.1V	31.1V	31.1V	31.1V	31.1V	31.1V
Voltage - Clamping (Max) @ Ipp	50V	45.4V	45.4V	45.4V	45.4V	45.4V
Current - Peak Pulse (10/1000µs)	12A	13.3A	13.2A	13.2A	13.8A	13.2A
Power - Peak Pulse	600W	600W	600W	600W	600W	600W
Operating Temperature (Min)	-65°C	-50°C	-55°C	-55°C	-55°C	-65°C
Operating Temperature (Max)	150°C	150°C	150°C	175°C	150°C	150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Type	Zener	Zener	Zener	Zener	Zener	Zener
Unidirectional Channels	1	1	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount

Engineering Selection Recommendations

All identified substitute parts maintain active product status and full RoHS3 compliance, qualifying them for direct functional replacement in applications requiring 28V reverse standoff TVS diode protection.

SMBJ28A (MDD): Provides equivalent electrical performance with 45.4V clamping voltage and 13.3A peak pulse current. Operating temperature minimum of -50°C is suitable for applications not requiring extended low-temperature operation below -50°C. High inventory availability (86,300 units) supports supply chain continuity.

SMBJ28A-13-F (Diodes Incorporated): Offers 45.4V clamping voltage with 13.2A peak pulse current and operating temperature range of -55°C to 150°C. Supplied in Cut Tape (CT) & Digi-Reel® packaging. Inventory of 20,100 units supports standard procurement volumes.

SMBJ28A-TP (Micro Commercial Co): Delivers 45.4V clamping voltage with 13.2A peak pulse current and extended maximum operating temperature of 175°C. Supplied on Tape & Reel (TR) matching the original packaging format. Inventory of 30,400 units supports automated assembly operations.

SMBJ28A-TR (STMicroelectronics): Provides 45.4V clamping voltage with 13.8A peak pulse current and operating temperature range of -55°C to 150°C. Supplied in Cut Tape (CT) & Digi-Reel® packaging. Inventory of 12,700 units available. Series designation includes TRANSIL™ product line.

SZ1SMB28AT3G (Littelfuse Inc.): Delivers 45.4V clamping voltage with 13.2A peak pulse current and operating temperature range of -65°C to 150°C, matching the original temperature extremes. Supplied on Tape & Reel (TR). Automotive grade with AEC-Q101 qualification. Capacitance specification of 590pF @ 1MHz provided. Highest inventory availability (143,959 units) supports large-volume procurement.

Frequently Asked Questions (FAQ)

Q: Can SMBJ28A substitute parts with 45.4V clamping voltage replace the SMBJ28E3/TR13 with 50V clamping voltage?

A: Yes. The 45.4V clamping voltage of substitute parts remains within acceptable tolerance for general-purpose transient suppression applications. Both the original part and substitutes maintain identical 28V reverse standoff voltage and 31.1V minimum breakdown voltage, ensuring equivalent circuit protection characteristics.

Q: Are all substitute parts available in Tape & Reel (TR) packaging?

A: SMBJ28A-TP and SZ1SMB28AT3G are supplied on Tape & Reel (TR), matching the original SMBJ28E3/TR13 packaging format. SMBJ28A-13-F and SMBJ28A-TR are supplied in Cut Tape (CT) & Digi-Reel® format. SMBJ28A (MDD) packaging format is not specified. Packaging selection depends on assembly equipment compatibility and procurement requirements.

Q: What is the significance of the operating temperature range differences?

A: The SMBJ28E3/TR13 operates from -65°C to 150°C. Substitute parts vary: SMBJ28A operates -50°C to 150°C; SMBJ28A-13-F, SMBJ28A-TR operate -55°C to 150°C; SMBJ28A-TP operates -55°C to 175°C; SZ1SMB28AT3G operates -65°C to 150°C. Selection depends on application temperature requirements. Applications requiring operation below -50°C should specify SZ1SMB28AT3G or the original SMBJ28E3/TR13.

Q: Does the SZ1SMB28AT3G automotive qualification affect its use in non-automotive applications?

A: No. Automotive-grade qualification (AEC-Q101) indicates enhanced reliability testing and quality assurance. This component is suitable for both automotive and general-purpose applications. The automotive qualification does not restrict use in non-automotive circuits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All identified substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the original SMBJ28E3/TR13 specifications.

Q: What is the difference between the peak pulse current ratings of 12A, 13.2A, 13.3A, and 13.8A?

A: These variations reflect manufacturer-specific design tolerances within the 600W peak pulse power rating. All values remain within acceptable operating parameters for general-purpose transient suppression. Circuit design should account for the specified peak pulse current of the selected component.

Q: Can substitute parts be mixed in the same circuit board assembly?

A: Yes. All substitute parts maintain identical electrical characteristics for reverse standoff voltage, breakdown voltage, and power dissipation rating. Mixed sourcing is permissible when supply constraints require component substitution during manufacturing.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message