SMBJ40AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ40AE3/TR13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Microchip Technology in the DO-214AA (SMB) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 40V reverse standoff voltage and 64.5V maximum clamping voltage. The part is active in production status and fully compliant with RoHS3 and REACH regulations.

Equivalent and substitute parts are necessary when the primary part experiences supply constraints, extended lead times, or when design flexibility permits selection from multiple qualified manufacturers offering identical or compatible electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	40	V
Voltage - Breakdown (Min)	44.4	V
Voltage - Clamping (Max) @ Ipp	64.5	V
Current - Peak Pulse (10/1000µs)	9.3	A
Power - Peak Pulse	600	W
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-65°C to 150°C	TJ
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SMBJ40AE3/TR13 is determined by strict equivalence across the following critical parameters:

Electrical Equivalence Requirements:

Voltage - Reverse Standoff (Typ): 40V
Voltage - Breakdown (Min): 44.4V
Voltage - Clamping (Max) @ Ipp: 64.5V
Current - Peak Pulse (10/1000µs): 9.3A (±tolerance)
Power - Peak Pulse: 600W
Unidirectional Channels: 1
Type: Zener

Mechanical Equivalence Requirements:

Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount

Compliance Requirements:

RoHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Unaffected
Active product status

Substitute parts are classified into two categories:

Direct Substitutes maintain all electrical parameters within specification and identical mechanical packaging. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Substitutes maintain core voltage and current parameters but may exhibit variations in secondary characteristics such as peak pulse current measurement conditions or clamping voltage. These parts require engineering evaluation for specific application requirements.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ)	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature Range	Product Status
SMBJ40AE3/TR13	Microchip Technology	40V	44.4V	64.5V	9.3A	600W	DO-214AA, SMB	-65°C to 150°C	Active
ATV06B400J-HF	Comchip Technology	40V	44.4V	64.5V	9.3A	600W	DO-214AA, SMB	-55°C to 150°C	Active
SMBJ40A	MDD	40V	44.4V	64.5V	9.3A	600W	DO-214AA, SMB	-50°C to 150°C	Active
SMBJ40A-13-F	Diodes Incorporated	40V	44.4V	64.5V	9.3A	600W	DO-214AA, SMB	-55°C to 150°C	Active
SMBJ40A-E3/52	Vishay General Semiconductor - Diodes Division	40V	44.4V	64.5V	9.3A	600W	DO-214AA, SMB	-55°C to 150°C	Active
SMBJ40A-TP	Micro Commercial Co	40V	44.4V	64.5V	9.3A	600W	DO-214AA, SMB	-55°C to 175°C	Active
SM6T47AY	STMicroelectronics	40V	44.4V	84V	48A (8/20µs)	600W	DO-214AA, SMB	-55°C to 150°C	Active
SMBJ40A-TR	STMicroelectronics	40V	44.4V	64.5V	9.7A	600W	DO-214AA, SMB	-55°C to 150°C	Active

Engineering Selection Recommendations

Direct Substitutes (Fully Equivalent):

The following parts maintain complete electrical and mechanical equivalence to the SMBJ40AE3/TR13:

SMBJ40A-E3/52 (Vishay General Semiconductor - Diodes Division): Identical electrical specifications with -55°C to 150°C operating range. Active product status with full RoHS3 and REACH compliance. Available in Cut Tape & Digi-Reel® packaging.
SMBJ40A-13-F (Diodes Incorporated): Identical electrical specifications with -55°C to 150°C operating range. Active product status with full RoHS3 and REACH compliance. Available in Cut Tape & Digi-Reel® packaging.
SMBJ40A-TP (Micro Commercial Co): Identical electrical specifications with extended operating range of -55°C to 175°C. Active product status with full RoHS3 and REACH compliance. Available in Tape & Reel packaging.
SMBJ40A-TR (STMicroelectronics): Maintains 40V reverse standoff, 44.4V breakdown, and 64.5V clamping voltage. Peak pulse current of 9.7A is within acceptable tolerance of 9.3A specification. Active product status with full RoHS3 and REACH compliance. Available in Cut Tape packaging.
ATV06B400J-HF (Comchip Technology): Identical electrical specifications with -55°C to 150°C operating range. Qualified to AEC-Q101 automotive standard. Active product status with full RoHS3 and REACH compliance. Available in Tape & Reel packaging.
SMBJ40A (MDD): Identical electrical specifications with -50°C to 150°C operating range. Active product status with full RoHS3 and REACH compliance.

Similar Substitute (Conditional Equivalence):

SM6T47AY (STMicroelectronics): Maintains 40V reverse standoff and 44.4V breakdown voltage. Clamping voltage is 84V (versus 64.5V) and peak pulse current is 48A at 8/20µs measurement condition (versus 9.3A at 10/1000µs). This part provides higher transient suppression capability and is suitable only for applications where the elevated clamping voltage and current rating do not create circuit compatibility issues. Active product status with AEC-Q101 automotive qualification and full RoHS3 and REACH compliance.

All substitute parts are active in production status and comply with RoHS3 and REACH regulations. Selection among direct substitutes is based on packaging format availability, inventory status, and operating temperature range requirements for the specific application.

Frequently Asked Questions (FAQ)

Q: Can SMBJ40A-E3/52 be used as a direct replacement for SMBJ40AE3/TR13?

A: Yes. Both parts maintain identical electrical specifications: 40V reverse standoff, 44.4V breakdown voltage, 64.5V clamping voltage, and 9.3A peak pulse current. Both are packaged in DO-214AA (SMB) surface mount format. The primary difference is packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and operating temperature range (-55°C to 150°C versus -65°C to 150°C). For applications operating above -55°C, this substitution is fully compatible.

Q: What is the difference between direct substitutes and similar substitutes?

A: Direct substitutes maintain all electrical parameters within the original specification: 40V reverse standoff, 44.4V breakdown, 64.5V clamping, and 9.3A peak pulse current. Similar substitutes, such as SM6T47AY, maintain the voltage standoff and breakdown parameters but differ in clamping voltage (84V) and peak pulse current (48A). Similar substitutes require engineering evaluation to confirm circuit compatibility.

Q: Is SMBJ40A-TP suitable for high-temperature applications?

A: SMBJ40A-TP operates across -55°C to 175°C, providing an extended upper temperature limit compared to the original SMBJ40AE3/TR13 (-65°C to 150°C). This part is suitable for applications requiring operation above 150°C. All other electrical specifications remain identical.

Q: Can SM6T47AY replace SMBJ40AE3/TR13 in any application?

A: SM6T47AY is classified as a similar substitute due to differences in clamping voltage (84V versus 64.5V) and peak pulse current (48A at 8/20µs versus 9.3A at 10/1000µs). This part provides higher transient suppression capability. Substitution is conditional and requires verification that the elevated clamping voltage does not exceed circuit component voltage ratings or create unintended circuit behavior.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the compliance status of the original SMBJ40AE3/TR13.

Q: What packaging formats are available for substitute parts?

A: Substitute parts are available in the following packaging formats: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and standard Cut Tape (CT). All maintain the DO-214AA (SMB) surface mount package format. Selection of packaging format depends on assembly process requirements and inventory management practices.

Q: Does ATV06B400J-HF have automotive qualification?

A: Yes. ATV06B400J-HF is qualified to AEC-Q101 automotive standard and carries an automotive grade designation. This part is suitable for automotive and industrial applications requiring automotive-grade component qualification.

Q: What is the minimum operating temperature difference between substitute parts?

A: The original SMBJ40AE3/TR13 operates from -65°C. Most direct substitutes operate from -55°C, representing a 10°C difference at the lower temperature limit. For applications requiring operation below -55°C, the original part or SMBJ40A (MDD, -50°C minimum) should be selected. SMBJ40A-TP extends the upper limit to 175°C.

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