SMCJ58 Transient Voltage Suppressor Diode – Equivalent & Substitute Parts

Part Overview

The SMCJ58 is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 58V reverse standoff voltage with a maximum clamping voltage of 98.28V at peak pulse current of 16.1A, housed in a DO-214AB (SMC) package. The SMCJ58 is currently listed as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Multiple active alternatives from established manufacturers provide compatible electrical and mechanical characteristics suitable for direct replacement.

Key Parameters

Parameter	Value	Unit
Voltage – Reverse Standoff (Typ)	58	V
Voltage – Breakdown (Min)	61.02	V
Voltage – Clamping (Max) @ Ipp	98.28	V
Current – Peak Pulse (10/1000µs)	16.1	A
Power – Peak Pulse	1500	W
Package / Case	DO-214AB, SMC	–
Mounting Type	Surface Mount	–
Operating Temperature Range	-55 to 150	°C
RoHS Status	ROHS3 Compliant	–
Moisture Sensitivity Level	1 (Unlimited)	–

Substitute Part Grouping Explanation

Substitution eligibility for the SMCJ58 is determined by the following critical parameters:

Voltage – Reverse Standoff: Must be 58V (±tolerance as specified by manufacturer)
Package / Case: Must be DO-214AB or SMC equivalent
Mounting Type: Must be Surface Mount
Unidirectional Channels: Must be 1
Type: Must be Zener
Applications: General Purpose

Substitute parts are grouped into two categories based on electrical performance:

Category A – Direct Electrical Equivalents (Clamping Voltage 93.6V): Parts with reduced clamping voltage compared to the original SMCJ58 (98.28V). These include SMCJ58A, SMCJ58A-13-F, SMCJ58A-TP, and SMCJ58AE3/TR13. These parts maintain the 58V standoff voltage and 16.1A peak pulse current specification, making them suitable for applications where the lower clamping voltage is acceptable.

Category B – Enhanced Performance Alternatives: Parts with higher peak pulse current ratings (32A) and increased power dissipation (3000W), including SMLJ58A, SMLJ58A-TP, and SMLJ58AE3/TR13. These provide additional margin for transient protection but maintain the same 58V standoff voltage and DO-214AB package.

Category C – Variant Clamping Voltage: SMCJ58E3/TR13 features a higher clamping voltage of 103V with reduced peak pulse current (14.6A), suitable for applications requiring higher voltage tolerance.

Parameter Comparison

Part Number	Manufacturer	Voltage – Reverse Standoff (V)	Voltage – Clamping (Max) @ Ipp (V)	Current – Peak Pulse (A)	Power – Peak Pulse (W)	Package	Operating Temp (°C)	Product Status
SMCJ58	Littelfuse Inc.	58	98.28	16.1	1500	DO-214AB	-55 to 150	Obsolete
SMCJ58A	MDD	58	93.6	16.1	1500	DO-214AB	-50 to 150	Active
3.0SMCJ58A-13	Diodes Incorporated	58	93.6	32.1	3000	DO-214AB	-55 to 175	Active
SMCJ58A-13-F	Diodes Incorporated	58	93.6	16	1500	DO-214AB	-55 to 150	Active
SMCJ58A-TP	Micro Commercial Co	58	93.6	16.1	1500	DO-214AB	-55 to 175	Active
SMCJ58AE3/TR13	Microchip Technology	58	93.6	16	1500	DO-214AB	-65 to 150	Active
SMCJ58E3/TR13	Microchip Technology	58	103	14.6	1500	DO-214AB	-65 to 150	Active
SMLJ58A	Bourns Inc.	58	93.6	32	3000	DO-214AB	-55 to 150	Active
SMLJ58A-TP	Micro Commercial Co	58	93.6	32	3000	DO-214AB	-55 to 175	Active
SMLJ58AE3/TR13	Microchip Technology	58	93.6	32	300	DO-214AB	-55 to 150	Active

Engineering Selection Recommendations

For Direct Replacement with Minimal Design Impact: Select SMCJ58A-TP (Micro Commercial Co) or SMCJ58A-13-F (Diodes Incorporated). Both maintain the original 16.1A peak pulse current and 1500W power rating while offering active product status and extended operating temperature ranges (-55°C to 175°C). SMCJ58A-TP is recommended for applications requiring the widest temperature margin.

For Enhanced Transient Protection: Select SMLJ58A (Bourns Inc.) or 3.0SMCJ58A-13 (Diodes Incorporated) when higher peak pulse current (32A) and increased power dissipation (3000W) are required. Both maintain the 58V standoff voltage and DO-214AB package while providing additional protection margin. SMLJ58A offers the highest inventory availability.

For Extended Temperature Operation: Select SMCJ58AE3/TR13 (Microchip Technology) for applications requiring operation down to -65°C. This part maintains the 16A peak pulse current specification and 1500W power rating with active product status.

For Higher Voltage Clamping Requirements: Select SMCJ58E3/TR13 (Microchip Technology) when a 103V clamping voltage is required, accepting the reduced peak pulse current of 14.6A.

All recommended substitutes are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original SMCJ58 compliance profile.

Frequently Asked Questions (FAQ)

Q: Can SMCJ58A directly replace SMCJ58 in existing designs?

A: SMCJ58A is electrically compatible as a direct replacement. The primary difference is a reduced clamping voltage (93.6V vs. 98.28V). This lower clamping voltage is acceptable in most general-purpose overvoltage protection applications. Verify that your circuit design tolerates the 4.68V reduction in maximum clamping voltage before implementation.

Q: What is the difference between SMCJ58A and SMLJ58A?

A: Both parts maintain the 58V standoff voltage and DO-214AB package. The key difference is peak pulse current and power dissipation: SMCJ58A handles 16.1A at 1500W, while SMLJ58A handles 32A at 3000W. Select SMLJ58A for applications requiring higher transient current protection or when design margins for peak pulse current are limited.

Q: Are all substitute parts ROHS3 compliant?

A: All listed substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original SMCJ58 specification. Verify specific REACH status with your supplier if REACH compliance documentation is required for your application.

Q: Can I use SMCJ58E3/TR13 as a substitute?

A: SMCJ58E3/TR13 is electrically compatible but features a higher clamping voltage (103V) and lower peak pulse current (14.6A). Use this part only if your circuit design specifically requires the higher clamping voltage. It is not recommended as a general replacement for the original SMCJ58.

Q: What packaging options are available for these substitutes?

A: All substitute parts are available in DO-214AB (SMC) surface-mount package, matching the original SMCJ58. Packaging options include Tape & Reel (TR) for automated assembly and Bulk for manual assembly. Verify packaging availability with your supplier based on production volume requirements.

Q: Which substitute offers the best inventory availability?

A: SMLJ58A (Bourns Inc.) offers the highest inventory availability at 109,880 pieces. SMCJ58A (MDD) provides 105,173 pieces. Both parts are suitable for high-volume production requirements.

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