SMCJ75A-13 Transient Voltage Suppressor (TVS) Diode Equivalent & Substitute Parts

Part Overview

The SMCJ75A-13 is a unidirectional Zener TVS diode manufactured by Diodes Incorporated, designed for transient voltage suppression in general-purpose applications. This surface-mount component operates across a junction temperature range of -55°C to 150°C and is packaged in the DO-214AB (SMC) form factor. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain electrical and mechanical compatibility within the specified parameter envelope.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	75	V
Voltage - Breakdown (Min)	83.3	V
Voltage - Clamping (Max) @ Ipp	121	V
Current - Peak Pulse (10/1000µs)	12.4	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C (TJ)
Mounting Type	Surface Mount	—
Package / Case	DO-214AB, SMC	—
Type	Zener	—
Unidirectional Channels	1	—

Substitute Part Grouping Explanation

Substitution eligibility for the SMCJ75A-13 is determined by strict equivalence across the following critical parameters:

Voltage - Reverse Standoff (Typ): 75V
Voltage - Breakdown (Min): 83.3V
Voltage - Clamping (Max) @ Ipp: 121V
Package / Case: DO-214AB (SMC)
Mounting Type: Surface Mount
Type: Zener, Unidirectional (1 channel)

Substitute parts are categorized into two groups:

Group 1: Direct Electrical & Mechanical Equivalents — Parts maintaining identical electrical specifications (12.4A peak pulse current, 1500W peak pulse power) and packaging.

Group 2: Enhanced Performance Equivalents — Parts with identical voltage parameters and packaging but increased current handling (24.8A to 41.4A) and power dissipation (3000W to 5000W), suitable for applications requiring higher transient energy absorption.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	Product Status	RoHS Status
SMCJ75A-13	Diodes Incorporated	75	83.3	121	12.4	1500	-55 to 150	DO-214AB (SMC)	Discontinued	RoHS Non-Compliant
SMCJ75A-13-F	Diodes Incorporated	75	83.3	121	12.4	1500	-55 to 150	DO-214AB (SMC)	Active	ROHS3 Compliant
SMCJ75A	Meritek	75	83.3	121	12.4	1500	-55 to 150	DO-214AB (SMC)	Active	ROHS3 Compliant
SMDJ75A	Alpha & Omega Semiconductor Inc.	75	83.3	121	24.8	3000	-55 to 150	DO-214AB (SMC)	Active	ROHS3 Compliant
SMLJ75A	Bourns Inc.	75	83.3	121	24.8	3000	-55 to 150	DO-214AB (SMC)	Active	ROHS3 Compliant
5.0SMDJ75A	Taiwan Semiconductor Corporation	75	83.3	121	41.4	5000	-55 to 175	DO-214AB (SMC)	Active	ROHS3 Compliant
5.0SMDJ75A-T7	Littelfuse Inc.	75	83.3	121	41.4	5000	-65 to 150	DO-214AB (SMC)	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: SMCJ75A-13-F (Diodes Incorporated)

This part is the direct successor to the discontinued SMCJ75A-13, maintaining identical electrical specifications and packaging. It is manufactured by the original supplier, carries ROHS3 compliance certification, and is actively produced with confirmed inventory availability. Selection of this part eliminates any electrical or mechanical redesign requirements.

Secondary Recommendation: SMCJ75A (Meritek)

This part provides direct electrical and mechanical equivalence with ROHS3 compliance and active product status. It is suitable for applications where supplier diversification is acceptable and inventory availability is prioritized.

Enhanced Performance Alternatives: SMDJ75A, SMLJ75A, 5.0SMDJ75A, 5.0SMDJ75A-T7

These parts maintain identical voltage parameters and packaging but provide increased peak pulse current and power dissipation capacity. Selection is appropriate for applications experiencing higher transient energy levels or requiring extended thermal margin. All carry ROHS3 compliance and active product status.

SMDJ75A and SMLJ75A: 24.8A peak pulse, 3000W power dissipation
5.0SMDJ75A: 41.4A peak pulse, 5000W power dissipation, extended operating temperature to 175°C
5.0SMDJ75A-T7: 41.4A peak pulse, 5000W power dissipation, extended low-temperature operation to -65°C

Frequently Asked Questions (FAQ)

Q: Can SMCJ75A-13 be directly replaced with SMCJ75A-13-F?

A: Yes. Both parts share identical electrical specifications, voltage ratings, current handling, power dissipation, and DO-214AB (SMC) packaging. The primary difference is product status and RoHS compliance. SMCJ75A-13-F is the active production equivalent.

Q: What is the difference between Group 1 and Group 2 substitutes?

A: Group 1 substitutes (SMCJ75A-13-F, SMCJ75A) maintain the original 12.4A peak pulse current and 1500W power rating. Group 2 substitutes (SMDJ75A, SMLJ75A, 5.0SMDJ75A, 5.0SMDJ75A-T7) provide higher current and power handling while maintaining identical voltage clamping characteristics. Group 2 parts are suitable for circuits experiencing higher transient energy.

Q: Are all substitute parts in the same physical package?

A: Yes. All listed substitutes use the DO-214AB (SMC) surface-mount package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Do substitute parts meet RoHS requirements?

A: The original SMCJ75A-13 is RoHS non-compliant. All listed substitutes carry ROHS3 compliance certification, meeting current regulatory requirements for new designs and procurement.

Q: Can enhanced performance parts (5.0SMDJ75A series) be used in place of the original part?

A: Yes, from an electrical standpoint. Enhanced performance parts maintain identical voltage parameters and clamping characteristics. However, circuit design should account for the increased current handling capability. These parts are suitable for applications requiring higher transient energy absorption or thermal margin.

Q: What is the operating temperature difference between 5.0SMDJ75A and 5.0SMDJ75A-T7?

A: 5.0SMDJ75A operates from -55°C to 175°C, while 5.0SMDJ75A-T7 operates from -65°C to 150°C. Selection depends on the specific thermal environment of the application.

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