1SMC36AT3 Equivalent & Substitute Parts

Part Overview

The 1SMC36AT3 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by onsemi, designed for general-purpose transient voltage protection in surface-mount applications. This component features a 36V reverse standoff voltage with a 58.1V maximum clamping voltage and 25.8A peak pulse current capability in a DO-214AB (SMC) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	1SMC36AT3
Manufacturer	onsemi
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Unidirectional Channels	1
Voltage - Reverse Standoff (Typ)	36V
Voltage - Breakdown (Min)	40V
Voltage - Clamping (Max) @ Ipp	58.1V
Current - Peak Pulse (10/1000µs)	25.8A
Power - Peak Pulse	1500W
Operating Temperature	-65°C ~ 150°C (TJ)
Mounting Type	Surface Mount
Package / Case	DO-214AB, SMC
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the 1SMC36AT3 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Voltage - Reverse Standoff (Typ): 36V
Voltage - Breakdown (Min): 40V
Voltage - Clamping (Max) @ Ipp: 58.1V
Unidirectional configuration (1 channel)
Operating Temperature range compatibility

Mechanical Compatibility Criteria:

Surface Mount mounting type
DO-214AB (SMC) package or equivalent package footprint

Substitute parts are grouped into two categories:

Direct Substitutes: Parts with identical electrical specifications (36V standoff, 58.1V clamping) and SMC package, maintaining 1500W peak pulse power rating and 25.8A–25.9A peak pulse current.

Higher-Power Alternatives: Parts with identical voltage specifications but enhanced current handling (86.1A) and power dissipation (5000W), suitable for applications requiring greater transient energy absorption while maintaining the same voltage protection threshold.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status	RoHS Status
1SMC36AT3	onsemi	36V	58.1V	25.8A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Obsolete	RoHS non-compliant
SMCJ36A	EVVO Semi	36V	58.1V	25.9A	600W	DO-214AC, SMA	-65°C ~ 150°C	Active	ROHS3 Compliant
5.0SMDJ36A	Taiwan Semiconductor Corporation	36V	58.1V	86.1A	5000W	DO-214AB, SMC	-55°C ~ 175°C	Active	ROHS3 Compliant
5.0SMDJ36A-T7	Littelfuse Inc.	36V	58.1V	86.1A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ36A-13-F	Diodes Incorporated	36V	58.1V	25.8A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant
SMCJ36A-HR	Littelfuse Inc.	36V	58.1V	25.9A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ36A-HRA	Littelfuse	36V	58.1V	25.9A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ36A-HRAT7	Littelfuse	36V	58.1V	25.9A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active	ROHS3 Compliant
SMCJ36A-M3/57T	Vishay General Semiconductor - Diodes Division	36V	58.1V	25.8A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical and Mechanical Specifications):

SMCJ36A-13-F (Diodes Incorporated), SMCJ36A-HR (Littelfuse Inc.), SMCJ36A-HRA (Littelfuse), SMCJ36A-HRAT7 (Littelfuse), and SMCJ36A-M3/57T (Vishay) are recommended as primary substitutes. These parts maintain the 36V standoff voltage, 58.1V clamping voltage, 25.8A–25.9A peak pulse current, 1500W peak pulse power, and DO-214AB (SMC) package configuration. All are active products with ROHS3 compliance, addressing the RoHS non-compliance status of the obsolete 1SMC36AT3.

For Enhanced Transient Protection (Higher Power Dissipation):

5.0SMDJ36A (Taiwan Semiconductor Corporation) and 5.0SMDJ36A-T7 (Littelfuse Inc.) provide identical voltage specifications but with significantly increased current handling (86.1A) and power dissipation (5000W). These parts are suitable for applications requiring greater transient energy absorption. Both maintain the DO-214AB (SMC) package and are ROHS3 compliant. The 5.0SMDJ36A-T7 variant matches the original operating temperature range (-65°C ~ 150°C).

Package Consideration:

SMCJ36A (EVVO Semi) is an active product with ROHS3 compliance but uses a DO-214AC (SMA) package instead of DO-214AB (SMC). This part is suitable only if PCB layout modifications to accommodate the different package footprint are acceptable.

Frequently Asked Questions (FAQ)

Q: Can I use SMCJ36A-13-F as a direct replacement for 1SMC36AT3?

A: Yes. SMCJ36A-13-F maintains identical electrical specifications (36V standoff, 58.1V clamping, 25.8A peak pulse current, 1500W power) and the same DO-214AB (SMC) package. It is an active product with ROHS3 compliance.

Q: What is the difference between the Littelfuse SMCJ36A-HR, SMCJ36A-HRA, and SMCJ36A-HRAT7 variants?

A: All three parts share identical electrical specifications and package configuration. The designations (-HR, -HRA, -HRAT7) represent different manufacturing or distribution variants from Littelfuse. Selection among these variants depends on availability and supply chain requirements.

Q: When should I use the 5.0SMDJ36A instead of SMCJ36A-13-F?

A: Use 5.0SMDJ36A when the application requires higher transient energy absorption. This part handles 86.1A peak pulse current and 5000W peak pulse power compared to 25.8A and 1500W in SMCJ36A-13-F. Both maintain the same 36V standoff and 58.1V clamping voltages, so the choice depends on transient severity in your circuit.

Q: Is the SMCJ36A (EVVO Semi) with SMA package compatible with my design?

A: SMCJ36A is electrically compatible but uses a DO-214AC (SMA) package instead of DO-214AB (SMC). PCB layout modifications are required to accommodate the different package footprint. Verify that your PCB design can be updated before selecting this part.

Q: Are all substitute parts RoHS compliant?

A: Yes. All recommended substitute parts are ROHS3 compliant, addressing the RoHS non-compliance status of the obsolete 1SMC36AT3.

Q: What is the operating temperature range difference between substitutes?

A: Most substitutes operate from -65°C to 150°C, matching the original 1SMC36AT3. SMCJ36A-13-F and SMCJ36A-M3/57T operate from -55°C to 150°C, providing a slightly narrower low-temperature range. 5.0SMDJ36A extends to -55°C to 175°C. Verify your application's temperature requirements before selection.

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