SMBJ8.0A-13 Equivalent & Substitute Parts

Part Overview

The SMBJ8.0A-13 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated in the SMB (DO-214AA) package. This component is designed for general-purpose overvoltage protection applications with an 8V reverse standoff voltage and 13.6V maximum clamping voltage. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	8V
Voltage - Breakdown (Min)	8.89V
Voltage - Clamping (Max) @ Ipp	13.6V
Current - Peak Pulse (10/1000µs)	44.1A
Power - Peak Pulse	600W
Operating Temperature	-55°C ~ 150°C (TJ)
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution eligibility for the SMBJ8.0A-13 is determined by the following critical parameters:

Voltage Rating Match: Reverse standoff voltage of 8V, breakdown voltage minimum of 8.89V, and clamping voltage maximum of 13.6V
Current Handling: Peak pulse current of 44.1A at 10/1000µs pulse width
Power Dissipation: 600W peak pulse power rating
Package Compatibility: DO-214AA (SMB) surface mount package
Device Type: Unidirectional Zener TVS diode

Substitute parts are grouped into two categories: direct electrical equivalents with identical voltage and current specifications, and manufacturer-recommended alternatives with comparable electrical performance within the same application class.

Parameter Comparison

Parameter	SMBJ8.0A-13 (Diodes)	SMBJ8.0A-E3/52 (Vishay)	SMBJ8.0A-TP (MCC)	SMBJ8.0A (MDD)	PTVS7V5P1UP,115 (Nexperia)
Manufacturer	Diodes Incorporated	Vishay General Semiconductor	Micro Commercial Co	MDD	Nexperia USA Inc.
Voltage - Reverse Standoff (Typ)	8V	8V	8V	8V	7.5V
Voltage - Breakdown (Min)	8.89V	8.89V	8.89V	8.89V	8.33V
Voltage - Clamping (Max) @ Ipp	13.6V	13.6V	13.6V	13.6V	12.9V
Current - Peak Pulse (10/1000µs)	44.1A	44.1A	44.1A	44.2A	46.5A
Power - Peak Pulse	600W	600W	600W	600W	600W
Operating Temperature	-55°C ~ 150°C (TJ)	-55°C ~ 150°C (TJ)	-55°C ~ 175°C (TJ)	-50°C ~ 150°C (TJ)	-55°C ~ 150°C (TA)
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	SOD-128
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Electrical Equivalents (Identical Voltage and Current Ratings)

SMBJ8.0A-E3/52 (Vishay General Semiconductor) and SMBJ8.0A-TP (Micro Commercial Co) are direct substitutes with matching 8V standoff voltage, 13.6V clamping voltage, and 44.1A peak pulse current. Both are in active production status and ROHS3 compliant. SMBJ8.0A-E3/52 maintains the original -55°C to 150°C temperature range, while SMBJ8.0A-TP extends the upper operating limit to 175°C. Both are available in DO-214AA (SMB) package format with tape and reel packaging.

SMBJ8.0A (MDD) provides an alternative with identical electrical specifications and active product status. This part operates within -50°C to 150°C temperature range and is ROHS3 compliant with SMB/DO-214AA packaging.

Manufacturer-Recommended Alternative

PTVS7V5P1UP,115 (Nexperia USA Inc.) is a manufacturer-recommended substitute with comparable electrical performance. This part features a 7.5V standoff voltage and 12.9V clamping voltage, representing a lower voltage rating class. The peak pulse current is 46.5A, slightly higher than the original specification. This device is packaged in SOD-128 format rather than SMB, requiring PCB layout modification. The part carries AEC-Q101 automotive qualification and is ROHS3 compliant. Selection of this alternative requires circuit-level evaluation to confirm voltage margin compatibility.

Frequently Asked Questions (FAQ)

Q: Can SMBJ8.0A-E3/52 directly replace SMBJ8.0A-13 without circuit modification?

A: Yes. SMBJ8.0A-E3/52 is a direct electrical equivalent with identical voltage ratings (8V standoff, 13.6V clamping) and current handling (44.1A peak pulse). Both use DO-214AA (SMB) package format. No circuit modification is required.

Q: What is the difference between SMBJ8.0A-TP and SMBJ8.0A-E3/52?

A: Both are direct electrical equivalents with identical voltage and current specifications. The primary difference is operating temperature range: SMBJ8.0A-TP extends to 175°C maximum junction temperature, while SMBJ8.0A-E3/52 is rated to 150°C. Manufacturer is also different (Micro Commercial Co vs. Vishay).

Q: Why is PTVS7V5P1UP,115 listed as a substitute if it has different voltage ratings?

A: PTVS7V5P1UP,115 is a manufacturer-recommended alternative for applications where the lower voltage class (7.5V standoff, 12.9V clamping) is acceptable. This part offers higher peak pulse current (46.5A) and automotive-grade qualification. Circuit evaluation is required to confirm voltage margin compatibility before selection.

Q: Can I use PTVS7V5P1UP,115 in the same PCB footprint as SMBJ8.0A-13?

A: No. PTVS7V5P1UP,115 uses SOD-128 package format, while SMBJ8.0A-13 uses DO-214AA (SMB) package. PCB layout and footprint modification is required.

Q: Are all substitute parts ROHS3 compliant?

A: All active substitute parts (SMBJ8.0A-E3/52, SMBJ8.0A-TP, SMBJ8.0A by MDD, and PTVS7V5P1UP,115) are ROHS3 compliant. The original SMBJ8.0A-13 is RoHS non-compliant.

Q: Which substitute offers the widest operating temperature range?

A: SMBJ8.0A-TP (Micro Commercial Co) offers the widest temperature range at -55°C to 175°C junction temperature, compared to -55°C to 150°C for most other equivalents.

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