SMBJ6.0 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ6.0 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. The device features a 6V reverse standoff voltage with a 10.82V maximum clamping voltage at peak pulse current, housed in a DO-214AA (SMB) surface mount package. The SMBJ6.0 is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for new designs and production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	6	V
Voltage - Breakdown (Min)	6.32	V
Voltage - Clamping (Max) @ Ipp	10.82	V
Current - Peak Pulse (10/1000µs)	58.3	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	—

Substitute Part Grouping Explanation

Substitution of the SMBJ6.0 is determined by the following critical electrical and mechanical parameters:

Reverse Standoff Voltage (Typ): Must equal 6V to maintain circuit protection threshold
Clamping Voltage (Max) @ Ipp: Must not exceed 10.82V to ensure adequate transient suppression
Peak Pulse Current (10/1000µs): Must support minimum 58.3A to handle expected surge conditions
Power - Peak Pulse: Must support 600W dissipation capability
Package / Case: Must be DO-214AA (SMB) surface mount for mechanical compatibility
Operating Temperature Range: Must support -65°C to 150°C minimum
RoHS Compliance: Must maintain ROHS3 compliance for regulatory alignment

All substitute parts listed maintain these critical parameters within acceptable engineering tolerances for direct replacement.

Parameter Comparison

Parameter	SMBJ6.0 (Littelfuse)	SMBJ6.0A (EVVO Semi)	SMBJ6.0A-13-F (Diodes Inc.)	SMBJ6.0A-TR (STMicroelectronics)
Manufacturer	Littelfuse Inc.	EVVO Semi	Diodes Incorporated	STMicroelectronics
Product Status	Obsolete	Active	Active	Active
Voltage - Reverse Standoff (Typ)	6V	6V	6V	6V
Voltage - Breakdown (Min)	6.32V	6.67V	6.67V	6.7V
Voltage - Clamping (Max) @ Ipp	10.82V	10.3V	10.3V	10.3V
Current - Peak Pulse (10/1000µs)	58.3A	58.3A	58.3A	61A
Power - Peak Pulse	600W	600W	600W	600W
Operating Temperature Range	-65 to 150°C	-65 to 150°C	-55 to 150°C	-55 to 150°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All three substitute parts—SMBJ6.0A (EVVO Semi), SMBJ6.0A-13-F (Diodes Incorporated), and SMBJ6.0A-TR (STMicroelectronics)—are active products with ROHS3 compliance and maintain the critical electrical parameters required for direct substitution of the obsolete SMBJ6.0.

The SMBJ6.0A from EVVO Semi and SMBJ6.0A-13-F from Diodes Incorporated both feature identical clamping voltage (10.3V) and peak pulse current (58.3A) specifications. The SMBJ6.0A-13-F from Diodes Incorporated includes REACH Unaffected status, providing additional regulatory documentation.

The SMBJ6.0A-TR from STMicroelectronics offers slightly enhanced peak pulse current capability (61A versus 58.3A) while maintaining the same clamping voltage and power dissipation ratings. This part carries REACH Unaffected certification and is available in Cut Tape and Digi-Reel packaging formats.

All substitute parts support the full operating temperature range or exceed the minimum requirement, with the exception of the Diodes Incorporated and STMicroelectronics variants, which operate from -55°C (still within typical industrial specifications).

Frequently Asked Questions (FAQ)

Q: Can SMBJ6.0A parts from different manufacturers be used interchangeably?

A: Yes. All listed substitute parts maintain the critical electrical parameters: 6V reverse standoff voltage, maximum 10.3V clamping voltage, 58.3A or higher peak pulse current, and 600W peak pulse power. All are housed in DO-214AA (SMB) surface mount packages and are ROHS3 compliant. Mechanical and electrical compatibility is ensured across manufacturers.

Q: What is the significance of the clamping voltage difference between the original SMBJ6.0 (10.82V) and the SMBJ6.0A substitutes (10.3V)?

A: The lower clamping voltage of the SMBJ6.0A variants (10.3V) provides improved transient suppression performance compared to the original part (10.82V). This represents an engineering improvement and does not compromise circuit protection; it enhances it by clamping transients to a lower voltage threshold.

Q: Are there packaging differences between the substitute parts?

A: All substitute parts use the DO-214AA (SMB) surface mount package. Packaging format options vary by manufacturer: EVVO Semi and STMicroelectronics offer Cut Tape (CT) and Digi-Reel formats, while Diodes Incorporated supplies Tape & Reel (TR) format. These are logistics variations only; the component footprint and electrical interface remain identical.

Q: Does the operating temperature range difference affect substitution suitability?

A: The original SMBJ6.0 operates from -65°C to 150°C. The Diodes Incorporated and STMicroelectronics variants operate from -55°C to 150°C. For applications requiring operation below -55°C, the EVVO Semi SMBJ6.0A maintains the full -65°C to 150°C range. For standard industrial applications, all variants are suitable.

Q: What compliance certifications are relevant for these parts?

A: All substitute parts are ROHS3 compliant. The Diodes Incorporated SMBJ6.0A-13-F and STMicroelectronics SMBJ6.0A-TR carry REACH Unaffected status, indicating no restricted substances under REACH regulations. The EVVO Semi variant does not list REACH status in the provided specifications.

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