SMBJ70AE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMBJ70AE3/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, offering a 70V reverse standoff voltage with a 113V maximum clamping voltage at peak pulse current. The part is active in production status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the primary manufacturer part becomes unavailable, when alternative packaging formats are required, or when sourcing from multiple suppliers is needed for supply chain resilience. Substitute parts must maintain electrical equivalence across critical parameters including reverse standoff voltage, clamping voltage, peak pulse current, and operating temperature range.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	70	V
Voltage - Breakdown (Min)	77.8	V
Voltage - Clamping (Max) @ Ipp	113	V
Current - Peak Pulse (10/1000µs)	5.3	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	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMBJ70AE3/TR13 are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents maintain all critical electrical parameters within specification:

Reverse standoff voltage: 70V (typical)
Breakdown voltage minimum: 77.8V
Clamping voltage maximum: 113V at peak pulse current
Peak pulse current: 5.3A (10/1000µs waveform)
Power dissipation: 600W peak pulse
Package: DO-214AA (SMB) surface mount
RoHS3 compliance and MSL 1 rating

Similar Parts share the same reverse standoff voltage (70V) and package format but differ in one or more electrical parameters, such as clamping voltage or peak pulse current rating. These parts are suitable only when the application tolerates the specified parameter variation.

The substitution logic is based strictly on matching the following key parameters:

Voltage - Reverse Standoff (Typ): 70V
Voltage - Clamping (Max) @ Ipp: 113V (for direct equivalents)
Current - Peak Pulse (10/1000µs): 5.3A (for direct equivalents)
Package / Case: DO-214AA, SMB
Mounting Type: Surface Mount
Operating Temperature Range: -65°C to 150°C minimum (or equivalent)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Typ) [V]	Vb (Min) [V]	Vc (Max) @ Ipp [V]	Ipp (10/1000µs) [A]	Ppp [W]	Temp Range [°C]	Package	Packaging Format	RoHS3
SMBJ70AE3/TR13	Microchip Technology	70	77.8	113	5.3	600	-65 to 150	DO-214AA, SMB	Tape & Reel (TR)	Yes
1SMB70A TR13 PBFREE	Central Semiconductor Corp	70	77.8	113	5.3	600	-65 to 150	DO-214AA, SMB	Tape & Reel (TR)	Yes
SMBJ70A	MDD	70	77.8	113	5.3	600	-50 to 150	DO-214AA, SMB	—	Yes
SMBJ70A-13-F	Diodes Incorporated	70	77.8	113	5.3	600	-55 to 150	DO-214AA, SMB	Tape & Reel (TR)	Yes
SMBJ70A-E3/52	Vishay General Semiconductor - Diodes Division	70	77.8	113	5.3	600	-55 to 150	DO-214AA, SMB	Tape & Reel (TR)	Yes
SMBJ70A-TP	Micro Commercial Co	70	77.8	113	5.3	600	-55 to 175	DO-214AA, SMB	Cut Tape (CT)	Yes
SMBJ70A-TR	STMicroelectronics	70	77.8	113	5.5	600	-55 to 150	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®	Yes
SM6T82AY	STMicroelectronics	70	77.8	146	27	600	-55 to 150	DO-214AA, SMB	Tape & Reel (TR)	Yes
SMBT70A-13-F	Diodes Incorporated	70	77.8	100	5.3	600	-55 to 150	DO-214AA, SMB	Cut Tape (CT) & Digi-Reel®	Yes

Engineering Selection Recommendations

Direct Equivalent Substitutes (Electrical and mechanical compatibility verified):

1SMB70A TR13 PBFREE (Central Semiconductor Corp) — Identical electrical specifications and operating temperature range. Tape & Reel packaging matches the primary part. 3009 units in stock.
SMBJ70A-13-F (Diodes Incorporated) — Meets all electrical requirements with operating temperature range of -55°C to 150°C, which covers the primary part's minimum specification. Tape & Reel packaging. 1885 units in stock.
SMBJ70A-E3/52 (Vishay General Semiconductor - Diodes Division) — Fully equivalent electrical specifications with operating temperature range of -55°C to 150°C. Tape & Reel packaging. Highest inventory availability at 45100 units.
SMBJ70A-TP (Micro Commercial Co) — Meets all electrical requirements with extended operating temperature range of -55°C to 175°C. Cut Tape packaging format. 3800 units in stock.

Conditional Substitutes (Parameter variations require application verification):

SMBJ70A (MDD) — Electrical specifications match except operating temperature range is -50°C to 150°C (narrower low-temperature specification). Suitable for applications not requiring -65°C operation. Highest inventory at 17200 units.
SMBJ70A-TR (STMicroelectronics) — Peak pulse current is 5.5A versus 5.3A specification. Clamping voltage and other parameters match. Suitable when slightly higher current capability is acceptable. 12900 units in stock.

Not Recommended as Direct Substitute:

SM6T82AY (STMicroelectronics) — Clamping voltage is 146V (versus 113V) and peak pulse current is 27A (versus 5.3A). This part is designed for higher transient energy applications and is not electrically equivalent.
SMBT70A-13-F (Diodes Incorporated) — Clamping voltage is 100V (versus 113V specification). This represents a 13V reduction in clamping performance and is not suitable as a direct substitute.

All recommended direct equivalents carry RoHS3 compliance, MSL 1 rating, and active product status, ensuring regulatory compliance and long-term availability.

Frequently Asked Questions (FAQ)

Q: Can I use SMBJ70A-E3/52 as a direct replacement for SMBJ70AE3/TR13?

A: Yes. The SMBJ70A-E3/52 from Vishay is a direct electrical equivalent with identical reverse standoff voltage (70V), breakdown voltage (77.8V minimum), clamping voltage (113V maximum), and peak pulse current (5.3A). Both are packaged in DO-214AA (SMB) surface mount format with RoHS3 compliance. The operating temperature range of -55°C to 150°C covers the primary part's specification of -65°C to 150°C for applications not requiring the extended low-temperature rating.

Q: What is the difference between the packaging formats listed (Tape & Reel, Cut Tape, Digi-Reel)?

A: Tape & Reel (TR) and Cut Tape (CT) refer to the physical delivery format for surface mount components. Tape & Reel is a continuous reel of components in embossed tape, typically used for high-volume automated assembly. Cut Tape is the same tape format but cut into smaller lengths, suitable for lower-volume applications or mixed component orders. Digi-Reel® is a proprietary format. All three formats contain electrically identical components; the difference is in handling and assembly logistics.

Q: Why does SMBJ70A from MDD have a narrower operating temperature range (-50°C to 150°C)?

A: The MDD SMBJ70A specifies a minimum operating temperature of -50°C instead of -65°C. This represents a tighter manufacturing tolerance or design specification for that particular manufacturer. If your application requires operation at temperatures below -50°C, this part is not suitable. For applications operating above -50°C, it is electrically equivalent.

Q: Can I substitute SMBT70A-13-F for SMBJ70AE3/TR13?

A: No. While SMBT70A-13-F shares the same reverse standoff voltage (70V) and package format, its clamping voltage is 100V compared to the required 113V. This 13V difference means the part will clamp transient voltages at a lower level, potentially providing insufficient protection in the circuit. This part is not suitable as a direct substitute.

Q: What does "RoHS3 Compliant" mean for component selection?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component meets European Union regulations restricting the use of specific hazardous materials including lead, cadmium, mercury, and certain flame retardants. All substitute parts listed carry RoHS3 compliance, ensuring they meet the same regulatory requirements as the primary part and are suitable for use in regulated markets and applications.

Q: Is the SMBJ70A-TP suitable for high-temperature applications?

A: The SMBJ70A-TP from Micro Commercial Co specifies an operating temperature range of -55°C to 175°C, which extends 25°C higher than the primary part's 150°C maximum. This extended high-temperature rating makes it suitable for applications requiring operation above 150°C. All other electrical parameters remain equivalent to the primary part.

Q: What does "MSL 1 (Unlimited)" mean?

A: Moisture Sensitivity Level (MSL) 1 indicates the component has unlimited shelf life and does not require special moisture-control storage conditions. This is the least restrictive MSL rating. All substitute parts carry MSL 1, meaning they have the same storage and handling requirements as the primary part.

Q: Can I use SM6T82AY as a substitute if my circuit can handle higher current?

A: No. While SM6T82AY shares the same reverse standoff voltage (70V) and package format, it is designed for a different application class. Its clamping voltage is 146V (versus 113V) and peak pulse current is 27A (versus 5.3A), indicating it is rated for significantly higher transient energy suppression. Using this part would alter the circuit's transient response characteristics and is not appropriate as a substitute for the SMBJ70AE3/TR13.

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