SMCJ12CA-M3/9AT Equivalent & Substitute Parts

Part Overview

The SMCJ12CA-M3/9AT is a bidirectional transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AB (SMC) package and provides transient overvoltage protection for general-purpose applications. The part is active and widely available with 1137 pieces in current inventory. Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	12	V
Voltage - Breakdown (Min)	13.3	V
Voltage - Clamping (Max) @ Ipp	19.9	V
Current - Peak Pulse (10/1000µs)	75.4	A
Power - Peak Pulse	1500	W
Operating Temperature Range	-55 to 150	°C
Package / Case	DO-214AB, SMC	-
Mounting Type	Surface Mount	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the SMCJ12CA-M3/9AT are classified into two functional groups based on electrical performance:

Group 1: Direct Electrical Equivalents (1500W Peak Pulse) These parts maintain identical voltage ratings and peak pulse current specifications as the main part:

Voltage - Reverse Standoff: 12V
Voltage - Breakdown (Min): 13.3V
Voltage - Clamping (Max) @ Ipp: 19.9V
Current - Peak Pulse (10/1000µs): 75.3–75.4A
Power - Peak Pulse: 1500W
Package: DO-214AB (SMC)
Mounting: Surface Mount

Group 2: Higher Power Rated Alternatives (3000W Peak Pulse) These parts share identical voltage characteristics but provide double the peak pulse power rating and approximately double the peak pulse current:

Voltage - Reverse Standoff: 12V
Voltage - Breakdown (Min): 13.3V
Voltage - Clamping (Max) @ Ipp: 19.9V
Current - Peak Pulse (10/1000µs): 150.6–150.8A
Power - Peak Pulse: 3000W
Package: DO-214AB (SMC)
Mounting: Surface Mount

All substitute parts maintain RoHS3 compliance, surface mount configuration, and general-purpose application suitability.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max @ Ipp (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Package	Operating Temp (°C)	RoHS Status
SMCJ12CA-M3/9AT	Vishay	12	13.3	19.9	75.4	1500	DO-214AB (SMC)	-55 to 150	ROHS3
SMCJ12CA-E3/57T	Vishay	12	13.3	19.9	75.4	1500	DO-214AB (SMC)	-55 to 150	ROHS3
SMCJ12CA-13-F	Diodes Incorporated	12	13.3	19.9	75.3	1500	DO-214AB (SMC)	-55 to 150	ROHS3
SMCJ12CA	Meritek	12	13.3	19.9	75.38	1500	DO-214AB (SMC)	-55 to 150	ROHS3
SMDJ12CA	Alpha & Omega Semiconductor	12	13.3	19.9	150.8	3000	DO-214AB (SMC)	-55 to 150	ROHS3
SMDJ12CA-HR	Littelfuse	12	13.3	19.9	150.8	3000	DO-214AB (SMC)	-65 to 150	ROHS3
SMLJ12CA	Bourns Inc.	12	13.3	19.9	150.6	3000	DO-214AB (SMC)	-55 to 150	ROHS3

Engineering Selection Recommendations

Direct Equivalents (Group 1): SMCJ12CA-E3/57T, SMCJ12CA-13-F, and SMCJ12CA provide identical electrical performance and power ratings to the SMCJ12CA-M3/9AT. These parts are suitable for one-to-one replacement in applications where the 1500W peak pulse rating is specified. All maintain active product status and ROHS3 compliance. Selection among these equivalents may be based on packaging availability (tape & reel versus cut tape) and supplier inventory levels.

Higher Power Alternatives (Group 2): SMDJ12CA, SMDJ12CA-HR, and SMLJ12CA maintain identical voltage characteristics but provide 3000W peak pulse capability. These parts are suitable for applications requiring enhanced transient energy absorption or where circuit protection margins must be increased. SMDJ12CA-HR extends the lower operating temperature limit to -65°C, providing broader thermal coverage. All Group 2 parts maintain active status and ROHS3 compliance.

All substitute parts are surface mount components in DO-214AB (SMC) package configuration, ensuring mechanical and thermal compatibility with the original part footprint.

Frequently Asked Questions (FAQ)

Q: Can SMCJ12CA-E3/57T replace SMCJ12CA-M3/9AT directly? A: Yes. Both parts share identical voltage ratings (12V standoff, 13.3V breakdown, 19.9V clamping), peak pulse current (75.4A), and power dissipation (1500W). The difference is packaging format: SMCJ12CA-E3/57T uses cut tape and Digi-Reel, while SMCJ12CA-M3/9AT uses tape & reel. Electrical performance is equivalent.

Q: What is the difference between 1500W and 3000W rated parts? A: The 3000W parts (SMDJ12CA, SMDJ12CA-HR, SMLJ12CA) handle double the peak pulse current (approximately 150.6–150.8A versus 75.4A) and dissipate twice the transient energy. Voltage characteristics remain identical. Selection depends on circuit transient severity and required protection margin.

Q: Are all substitute parts RoHS3 compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance, matching the environmental and regulatory status of the SMCJ12CA-M3/9AT.

Q: Can I use SMDJ12CA-HR in place of SMCJ12CA-M3/9AT? A: Yes, with consideration for application requirements. SMDJ12CA-HR provides higher power rating (3000W versus 1500W) and extended lower temperature operation (-65°C versus -55°C). Voltage ratings are identical. This substitution is suitable when enhanced transient protection or broader temperature range is required.

Q: Does package format affect electrical performance? A: No. DO-214AB (SMC) package variants (tape & reel, cut tape, Digi-Reel) do not affect electrical characteristics. Package format selection is based on assembly process requirements and inventory management.

Q: What compliance certifications apply to all substitute parts? A: All parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99. HTSUS code 8541.10.0080 applies uniformly across all listed parts.

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