SMBJ7.5AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ7.5AE3/TR13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology. This surface mount component operates in the 7.5V reverse standoff voltage class and provides transient overvoltage protection in general-purpose applications. The device is specified for a 12.9V maximum clamping voltage at peak pulse current and dissipates 600W peak pulse power. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters, package compatibility, and operational specifications within the DO-214AA/SMB form factor.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	7.5	V
Voltage - Breakdown (Min)	8.33	V
Voltage - Clamping (Max) @ Ipp	12.9	V
Current - Peak Pulse (10/1000µs)	46.5	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ7.5AE3/TR13 are classified based on strict electrical and mechanical parameter matching within the TVS diode category. The substitution criteria are:

Primary Matching Parameters:

Voltage - Reverse Standoff (Typ): 7.5V
Voltage - Clamping (Max) @ Ipp: 12.9V
Current - Peak Pulse (10/1000µs): 46.5A (±0.1A tolerance acceptable)
Power - Peak Pulse: 600W
Package / Case: DO-214AA or SMB equivalent
Mounting Type: Surface Mount
Unidirectional Channels: 1
Type: Zener
RoHS Status: ROHS3 Compliant

Direct Substitutes maintain all key electrical parameters and operating temperature range (-65°C to 150°C). These parts are functionally interchangeable without circuit redesign.

Similar Substitutes maintain all critical electrical parameters but may have minor variations in operating temperature range or peak pulse current within acceptable engineering tolerances. These parts are suitable for applications where the specified temperature range is not a limiting factor.

Parameter Comparison

Part Number	Manufacturer	Vwm (Typ) V	Vc (Max) @ Ipp V	Ipp A	Ppp W	Temp Range °C	Package	Status
SMBJ7.5AE3/TR13	Microchip Technology	7.5	12.9	46.5	600	-65 to 150	DO-214AA, SMB	Active
1SMB7.5A TR13 PBFREE	Central Semiconductor Corp	7.5	12.9	46.5	600	-65 to 150	DO-214AA, SMB	Active
SMBJ7.5A-13-F	Diodes Incorporated	7.5	12.9	46.5	600	-55 to 150	DO-214AA, SMB	Active
SMBJ7.5A-E3/52	Vishay General Semiconductor - Diodes Division	7.5	12.9	46.5	600	-55 to 150	DO-214AA, SMB	Active
SMBJ7.5A	MDD	7.5	12.9	46.6	600	-50 to 150	DO-214AA, SMB	Active
SZ1SMB7.5AT3G	Littelfuse Inc.	7.5	12.9	46.5	600	-65 to 150	DO-214AA, SMB	Active

Engineering Selection Recommendations

Direct Substitutes (Full Compatibility):

The following parts are direct substitutes for SMBJ7.5AE3/TR13 and maintain identical electrical specifications and operating temperature range:

1SMB7.5A TR13 PBFREE (Central Semiconductor Corp): Matches all key parameters including -65°C to 150°C operating range. ROHS3 compliant with MSL 1 rating. Suitable for direct replacement in existing designs.
SZ1SMB7.5AT3G (Littelfuse Inc.): Matches all electrical parameters and operating temperature range. Includes AEC-Q101 automotive qualification and carries 1890pF capacitance specification at 1MHz. ROHS3 compliant with MSL 1 rating. Suitable for applications requiring automotive-grade components.

Suitable Substitutes (Minor Parameter Variation):

The following parts maintain critical electrical performance but operate within a narrower temperature range (-55°C to -50°C minimum instead of -65°C):

SMBJ7.5A-13-F (Diodes Incorporated): Operates from -55°C to 150°C. All electrical parameters match specification. ROHS3 compliant. Suitable for applications where -65°C minimum temperature is not required.
SMBJ7.5A-E3/52 (Vishay General Semiconductor - Diodes Division): Operates from -55°C to 150°C. Branded as TransZorb® series. All electrical parameters match specification. ROHS3 compliant. Suitable for applications where -65°C minimum temperature is not required.
SMBJ7.5A (MDD): Operates from -50°C to 150°C with peak pulse current of 46.6A (0.1A above specification). All other electrical parameters match. ROHS3 compliant. Suitable for applications where -50°C minimum temperature is acceptable.

All substitute parts are active in production status, ROHS3 compliant, and carry MSL 1 (unlimited) moisture sensitivity rating. Selection should be based on application temperature requirements and manufacturer availability.

Frequently Asked Questions (FAQ)

Q: Can SMBJ7.5A-13-F replace SMBJ7.5AE3/TR13 in all applications?

A: SMBJ7.5A-13-F is suitable for replacement in applications where the minimum operating temperature requirement is -55°C or higher. If your application requires operation at -65°C, use 1SMB7.5A TR13 PBFREE or SZ1SMB7.5AT3G instead. All other electrical parameters are identical.

Q: What is the difference between DO-214AA and SMB package designations?

A: DO-214AA and SMB refer to the same physical package form factor for surface mount diodes. These designations are interchangeable in the context of this product category. All listed substitute parts use this identical package.

Q: Is SZ1SMB7.5AT3G suitable for non-automotive applications?

A: Yes. SZ1SMB7.5AT3G meets all electrical specifications for the 7.5V TVS diode class and is ROHS3 compliant. The AEC-Q101 automotive qualification indicates enhanced reliability testing but does not restrict use to automotive applications. This part is suitable for general-purpose transient voltage suppression.

Q: What does MSL 1 (Unlimited) moisture sensitivity mean?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All listed parts carry this rating, eliminating moisture-related supply chain constraints.

Q: Are all substitute parts lead-free?

A: Yes. All listed parts are ROHS3 compliant, which requires lead-free construction. The designation "PBFREE" in part number 1SMB7.5A TR13 PBFREE explicitly confirms this compliance.

Q: Can I use SMBJ7.5A (MDD) if my application operates at -60°C?

A: No. SMBJ7.5A (MDD) is specified for -50°C minimum operating temperature. For -60°C operation, use 1SMB7.5A TR13 PBFREE, SMBJ7.5AE3/TR13, or SZ1SMB7.5AT3G, which are rated to -65°C.

Q: What is the significance of the 46.6A peak pulse current in SMBJ7.5A (MDD)?

A: The 46.6A specification is 0.1A above the 46.5A baseline. This minor variation falls within acceptable engineering tolerance for TVS diode performance and does not affect circuit protection capability. The part remains suitable for applications designed around the 46.5A specification.

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