SMLJ58C Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMLJ58C is a bidirectional Zener-type transient voltage suppressor manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 58V reverse standoff voltage with 103V maximum clamping voltage and 39.2A peak pulse current capability in a DO-214AB (SMC) package. The part is active in production status with RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).

Equivalent and substitute parts are identified based on matching electrical characteristics within the 58V reverse standoff voltage class, compatible DO-214AB packaging, and comparable clamping voltage and current ratings suitable for general-purpose transient suppression applications.

Key Parameters

Parameter	SMLJ58C Value	Unit
Voltage - Reverse Standoff (Typ)	58	V
Voltage - Breakdown (Min)	64.4	V
Voltage - Clamping (Max) @ Ipp	103	V
Current - Peak Pulse (10/1000µs)	39.2	A
Power - Peak Pulse	3000	W
Bidirectional Channels	1	—
Operating Temperature Range	-55 to 175	°C
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SMLJ58C are qualified based on the following electrical and mechanical parameters:

Voltage Class Match: Reverse standoff voltage of 58V (±tolerance) and breakdown voltage minimum of 64.4V
Package Compatibility: DO-214AB (SMC) surface-mount package required for direct PCB substitution
Clamping Voltage Range: Maximum clamping voltage between 93.6V and 103V at peak pulse current
Peak Pulse Current: Rated current capacity from 16A to 54.6A at 10/1000µs pulse
Power Dissipation: Peak pulse power rating from 1500W to 5000W
Bidirectionality: Single bidirectional channel configuration
Type: Zener diode classification
Compliance: RoHS3 compliance and MSL 1 rating

All substitute parts maintain the same voltage class and package footprint, enabling direct replacement in general-purpose transient suppression circuits. Variations in clamping voltage, peak pulse current, and power dissipation reflect different manufacturer designs within the 58V protection class.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	Product Status
SMLJ58C	Micro Commercial Co	58	64.4	103	39.2	3000	-55 to 175	DO-214AB, SMC	Active
5.0SMDJ58CA	HY Electronic (Cayman) Limited	58	64.4	93.6	54.6	5000	-65 to 150	DO-214AB, SMC	Active
SMC3K58CA-M3/57	Vishay General Semiconductor - Diodes Division	58	64.4	93.6	32.1	3000	-55 to 150	DO-214AB, SMC	Active
SMCJ58CA	EVVO Semi	58	64.4	93.6	16.1	1500	-55 to 150	DO-214AB, SMC	Active
SMCJ58CA-13-F	Diodes Incorporated	58	64.4	93.6	16	1500	-55 to 150	DO-214AB, SMC	Active
SMDJ58CA-T7	Littelfuse Inc.	58	64.4	93.6	32.1	3000	-65 to 150	DO-214AB, SMC	Active
SMLJ58CA	Bourns Inc.	58	64.4	93.6	32	3000	-55 to 150	DO-214AB, SMC	Active

Engineering Selection Recommendations

All substitute parts listed maintain active production status and RoHS3 compliance, meeting regulatory requirements for new designs. Selection among substitutes depends on application-specific requirements:

Higher Current Capacity Applications: The 5.0SMDJ58CA from HY Electronic provides the highest peak pulse current rating (54.6A) and power dissipation (5000W), suitable for circuits requiring maximum transient energy absorption within the 58V class.

Standard Performance Match: The SMC3K58CA-M3/57 (Vishay), SMDJ58CA-T7 (Littelfuse), and SMLJ58CA (Bourns) offer 32A to 32.1A peak pulse current with 3000W power dissipation, closely matching the SMLJ58C electrical performance while providing alternative sourcing options.

Lower Current Applications: The SMCJ58CA variants from EVVO Semi and Diodes Incorporated (SMCJ58CA-13-F) provide 16A to 16.1A peak pulse current with 1500W power dissipation, suitable for circuits with reduced transient energy requirements.

Temperature Range Consideration: The SMLJ58C operates to 175°C junction temperature, exceeding all substitute parts which operate to 150°C maximum. Applications requiring extended high-temperature operation must retain the SMLJ58C.

Frequently Asked Questions (FAQ)

Q: Can I substitute SMLJ58C with any of these parts directly on the PCB?

A: Yes, all listed substitute parts share the DO-214AB (SMC) package footprint and 58V voltage class, enabling direct PCB substitution. However, verify that your circuit design accommodates the specific clamping voltage and peak pulse current of the selected substitute.

Q: What is the primary difference between SMLJ58C and SMLJ58CA?

A: Both parts maintain identical voltage ratings (58V standoff, 64.4V breakdown) and DO-214AB packaging. The SMLJ58CA from Bourns provides 32A peak pulse current versus 39.2A for the SMLJ58C, with matching 3000W power dissipation. The SMLJ58CA operates to 150°C maximum versus 175°C for the SMLJ58C.

Q: Why does 5.0SMDJ58CA have higher current and power ratings?

A: The 5.0SMDJ58CA is designed for higher transient energy absorption applications, offering 54.6A peak pulse current and 5000W power dissipation within the same 58V voltage class. This represents a higher-performance variant suitable for demanding protection circuits.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts carry RoHS3 compliance certification, meeting environmental and regulatory requirements for new product designs.

Q: What packaging options are available for these parts?

A: All parts are supplied in DO-214AB (SMC) surface-mount package. Packaging formats vary by manufacturer and supplier: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, or standard reel configurations. Verify packaging availability with your component supplier.

Q: Can I use SMCJ58CA in place of SMLJ58C if my circuit only requires 16A protection?

A: Yes, the SMCJ58CA provides adequate protection for circuits requiring 16A peak pulse current. The lower current rating does not affect voltage protection characteristics; both maintain 58V standoff and 93.6V clamping voltage. Ensure your transient energy does not exceed 1500W peak pulse power.

Q: What is the significance of the clamping voltage difference between SMLJ58C (103V) and substitute parts (93.6V)?

A: The SMLJ58C clamps transients to a maximum of 103V, while most substitutes clamp to 93.6V. Lower clamping voltage provides tighter protection margins. Select based on your protected circuit's voltage tolerance specifications.

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