1SMC6.0AT3 Equivalent & Substitute Parts

Part Overview

The 1SMC6.0AT3 is a unidirectional transient voltage suppressor (TVS) diode manufactured by onsemi, rated for 6V reverse standoff voltage with 10.3V maximum clamping voltage and 145.6A peak pulse current. The device is packaged in DO-214AB (SMC) surface mount configuration and is designed for general-purpose transient voltage suppression applications.

The 1SMC6.0AT3 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production and field replacements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	6V
Voltage - Breakdown (Min)	6.67V
Voltage - Clamping (Max) @ Ipp	10.3V
Current - Peak Pulse (10/1000µs)	145.6A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Operating Temperature	-65°C ~ 150°C (TJ)
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitution of the 1SMC6.0AT3 is determined by the following electrical and mechanical parameters:

Voltage - Reverse Standoff: 6V (exact match required)
Voltage - Clamping (Max) @ Ipp: 10.3V (exact match required)
Current - Peak Pulse (10/1000µs): 145.6A nominal (tolerance range acceptable)
Power - Peak Pulse: 1500W (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Type: Zener, Unidirectional (exact match required)

Substitute parts are grouped into two categories:

Direct Substitutes: Parts with identical electrical specifications and package configuration, suitable for direct replacement without circuit modification.

Similar Substitutes: Parts with equivalent electrical performance within acceptable tolerance ranges but may have minor specification variations (clamping voltage ±1.1V, peak pulse current ±6.4A) or different product status and compliance certifications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Operating Temperature	Product Status	RoHS Status
1SMC6.0AT3	onsemi	6V	10.3V	145.6A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Obsolete	RoHS non-compliant
SMCJ6.0A	Taiwan Semiconductor Corporation	6V	10.3V	152A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0A-13-F	Diodes Incorporated	6V	10.3V	145.6A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0A-HR	Littelfuse Inc.	6V	10.3V	145.7A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0A-HRA	Littelfuse Inc.	6V	10.3V	145.7A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0A-HRAT7	Littelfuse Inc.	6V	10.3V	145.7A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0A-M3/9AT	Vishay General Semiconductor - Diodes Division	6V	10.3V	145.6A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0A-TR	STMicroelectronics	6V	13.7V	730A (8/20µs)	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0AE3/TR13	Microchip Technology	6V	10.3V	145.6A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ6.0E3/TR13	Microchip Technology	6V	11.4V	131.6A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Direct Replacement):

SMCJ6.0A (Taiwan Semiconductor Corporation), SMCJ6.0A-13-F (Diodes Incorporated), SMCJ6.0A-HR (Littelfuse Inc.), SMCJ6.0A-HRA (Littelfuse Inc.), SMCJ6.0A-HRAT7 (Littelfuse Inc.), SMCJ6.0A-M3/9AT (Vishay General Semiconductor), and SMCJ6.0AE3/TR13 (Microchip Technology) meet the core electrical specifications of the 1SMC6.0AT3 with 6V reverse standoff voltage, 10.3V clamping voltage, and 145.6A peak pulse current rating.

All primary substitutes are classified as Active products with ROHS3 compliance, providing improved regulatory status compared to the obsolete, RoHS non-compliant 1SMC6.0AT3.

Secondary Substitutes (Conditional Use):

SMCJ6.0A-TR (STMicroelectronics) and SMCJ6.0E3/TR13 (Microchip Technology) exhibit deviations from the primary electrical specifications. SMCJ6.0A-TR specifies 13.7V clamping voltage and 730A peak pulse current (8/20µs pulse width), representing a significant departure from the 10.3V and 145.6A parameters. SMCJ6.0E3/TR13 specifies 11.4V clamping voltage and 131.6A peak pulse current. These parts are suitable only when circuit design permits the specified voltage and current variations.

Compliance Considerations:

All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The 1SMC6.0AT3 is RoHS non-compliant, making substitution necessary for applications subject to RoHS directives.

Temperature Range Considerations:

The 1SMC6.0AT3 operates across -65°C to 150°C. SMCJ6.0A-HR, SMCJ6.0A-HRA, SMCJ6.0A-HRAT7, and SMCJ6.0AE3/TR13 maintain the full -65°C to 150°C range. SMCJ6.0A, SMCJ6.0A-13-F, SMCJ6.0A-M3/9AT, and SMCJ6.0A-TR operate across -55°C to 150°C, representing a 10°C reduction in minimum operating temperature.

Frequently Asked Questions (FAQ)

Q: Can SMCJ6.0A be used as a direct replacement for 1SMC6.0AT3?

A: Yes. SMCJ6.0A meets the core electrical specifications: 6V reverse standoff voltage, 10.3V clamping voltage, 152A peak pulse current (within tolerance of 145.6A), 1500W peak pulse power, and DO-214AB SMC package. SMCJ6.0A is an active product with ROHS3 compliance. The minimum operating temperature is -55°C versus -65°C for the 1SMC6.0AT3.

Q: What is the difference between SMCJ6.0A-HR and SMCJ6.0A-HRA?

A: Both parts are manufactured by Littelfuse Inc. with identical electrical specifications: 6V reverse standoff voltage, 10.3V clamping voltage, 145.7A peak pulse current, and -65°C to 150°C operating temperature range. The suffix designations (-HR and -HRA) indicate different product series or packaging variants within the Littelfuse product line. Electrical performance is equivalent.

Q: Why does SMCJ6.0A-TR show different electrical specifications?

A: SMCJ6.0A-TR is manufactured by STMicroelectronics under the TRANSIL™ series designation. This part specifies 13.7V clamping voltage and 730A peak pulse current (8/20µs pulse width), which differ from the 10.3V and 145.6A (10/1000µs) specifications of the 1SMC6.0AT3. The different pulse width standard (8/20µs versus 10/1000µs) results in higher measured current values. This part is suitable only when circuit design accommodates the higher clamping voltage.

Q: Are all substitute parts available in the same packaging?

A: Yes. All substitute parts are packaged in DO-214AB (SMC) surface mount configuration, matching the 1SMC6.0AT3 package specification. Mounting footprint and PCB layout compatibility are maintained across all listed substitutes.

Q: What is the impact of the -55°C minimum operating temperature on some substitutes?

A: SMCJ6.0A, SMCJ6.0A-13-F, SMCJ6.0A-M3/9AT, and SMCJ6.0A-TR specify -55°C minimum operating temperature, compared to -65°C for the 1SMC6.0AT3. Applications requiring operation below -55°C must use SMCJ6.0A-HR, SMCJ6.0A-HRA, SMCJ6.0A-HRAT7, or SMCJ6.0AE3/TR13, which maintain the full -65°C to 150°C range.

Q: Is RoHS compliance a factor in selecting a substitute?

A: Yes. The 1SMC6.0AT3 is RoHS non-compliant. All listed substitute parts are ROHS3 compliant. Applications subject to RoHS directives (EU Directive 2011/65/EU and amendments) require substitution with a compliant part. All substitutes meet this requirement.

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