SMCJ54CA-TP Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMCJ54CA-TP is an active Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection in surface-mount applications. This bidirectional Zener diode operates with a 54V reverse standoff voltage and provides 87.1V maximum clamping voltage at peak pulse current. The part is ROHS3 compliant and maintains unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified based on matching electrical performance parameters and mechanical compatibility within the DO-214AB (SMC) package family.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	54	V
Voltage - Breakdown (Min)	60	V
Voltage - Clamping (Max) @ Ipp	87.1	V
Current - Peak Pulse (10/1000µs)	17.3	A
Power - Peak Pulse	1500	W
Package / Case	DO-214AB, SMC	—
Mounting Type	Surface Mount	—
Operating Temperature	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SMCJ54CA-TP are classified into two categories based on electrical parameter alignment:

Direct Equivalents (Identical Electrical Performance): Parts maintaining the same reverse standoff voltage (54V), breakdown voltage (60V minimum), clamping voltage (87.1V), and peak pulse current (17.2–17.3A) within the 1500W power rating. These parts are functionally interchangeable in applications where the 1500W power dissipation specification is sufficient.

Higher-Performance Alternatives (Enhanced Current Handling): Parts with identical voltage specifications but increased peak pulse current (34.4–57.5A) and proportionally higher power ratings (3000–5000W). These parts provide superior transient suppression capability and are suitable for applications requiring greater energy absorption without circuit redesign.

Critical Substitution Parameters:

Voltage - Reverse Standoff: 54V (fixed)
Voltage - Clamping (Max) @ Ipp: 87.1V (fixed)
Package / Case: DO-214AB, SMC (fixed)
Mounting Type: Surface Mount (fixed)
Bidirectional Channels: 1 (fixed)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Clamping (Max) @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temperature (°C)	Package / Case	RoHS Status	Product Status
SMCJ54CA-TP	Micro Commercial Co	54	87.1	17.3	1500	-55 to 175	DO-214AB, SMC	ROHS3 Compliant	Active
SMCJ54CA	Meritek	54	87.1	17.22	1500	-55 to 150	DO-214AB (SMC)	ROHS3 Compliant	Active
SMCJ54CA-13-F	Diodes Incorporated	54	87.1	17.2	1500	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Active
5.0SMDJ54CA	MDE Semiconductor Inc	54	87.1	57.5	5000	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Active
5.0SMDJ54CA-T7	Littelfuse Inc.	54	87.1	57.5	5000	-65 to 150	DO-214AB, SMC	ROHS3 Compliant	Active
SMDJ54CA	Alpha & Omega Semiconductor Inc.	54	87.1	34.5	3000	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Active
SMLJ54CA	Bourns Inc.	54	87.1	34.4	3000	-55 to 150	DO-214AB, SMC	ROHS3 Compliant	Active

Engineering Selection Recommendations

All listed substitute parts maintain active product status and ROHS3 compliance, ensuring regulatory alignment with the original SMCJ54CA-TP specification.

For Direct Replacement (1500W Applications): SMCJ54CA (Meritek) and SMCJ54CA-13-F (Diodes Incorporated) provide electrical equivalence with identical 1500W power ratings and 17.2–17.3A peak pulse current. Both are suitable for applications where the original power dissipation specification is required. Note that Meritek and Diodes Incorporated variants operate to -55°C to 150°C, compared to the original part's -55°C to 175°C upper temperature limit.

For Enhanced Protection (3000W Applications): SMDJ54CA (Alpha & Omega Semiconductor Inc.) and SMLJ54CA (Bourns Inc.) provide 3000W peak pulse power with 34.4–34.5A peak pulse current. These parts are suitable for applications requiring increased transient energy absorption while maintaining the same voltage clamping characteristics.

For Maximum Protection (5000W Applications): 5.0SMDJ54CA (MDE Semiconductor Inc.) and 5.0SMDJ54CA-T7 (Littelfuse Inc.) provide 5000W peak pulse power with 57.5A peak pulse current. The Littelfuse variant extends the lower operating temperature to -65°C, providing enhanced cold-temperature performance.

Frequently Asked Questions (FAQ)

Q: Can SMCJ54CA-TP be replaced with SMDJ54CA or SMLJ54CA?

A: Yes. Both SMDJ54CA and SMLJ54CA maintain identical voltage specifications (54V reverse standoff, 87.1V clamping) and DO-214AB SMC package compatibility. The primary difference is increased peak pulse current (34.4–34.5A versus 17.3A) and power rating (3000W versus 1500W). These parts are suitable for applications where higher transient energy absorption is beneficial or required.

Q: What is the difference between SMCJ54CA-TP and 5.0SMDJ54CA-T7?

A: Both parts share identical voltage specifications and DO-214AB SMC packaging. The 5.0SMDJ54CA-T7 provides significantly higher peak pulse current (57.5A versus 17.3A) and power rating (5000W versus 1500W). Additionally, the Littelfuse variant operates to -65°C minimum temperature, compared to -55°C for the original part. Selection depends on application transient energy requirements.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 compliance, ensuring regulatory alignment with the original SMCJ54CA-TP specification.

Q: Can higher-power variants (3000W or 5000W) be used in place of the 1500W SMCJ54CA-TP?

A: Yes. Higher-power variants (SMDJ54CA, SMLJ54CA, 5.0SMDJ54CA, 5.0SMDJ54CA-T7) maintain identical voltage clamping characteristics and are mechanically compatible in DO-214AB SMC packages. These parts provide enhanced transient suppression capability without affecting circuit functionality. No circuit redesign is required.

Q: What is the operating temperature range difference between SMCJ54CA-TP and substitute parts?

A: SMCJ54CA-TP operates from -55°C to 175°C. Direct equivalents SMCJ54CA and SMCJ54CA-13-F operate to -55°C to 150°C. Higher-performance variants operate to -55°C to 150°C, except 5.0SMDJ54CA-T7 which extends to -65°C minimum. Applications requiring operation above 150°C must use the original SMCJ54CA-TP or confirm thermal compatibility with the selected substitute.

Q: Are packaging differences between substitute parts significant?

A: All substitute parts use DO-214AB SMC surface-mount packaging, ensuring mechanical and footprint compatibility. Packaging designations (CT, TR, or unspecified) refer to tape format (Cut Tape or Tape & Reel) and do not affect electrical performance or PCB mounting compatibility.

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