SMAJ12CE3/TR13 Equivalent & Substitute Parts

Part Overview

The SMAJ12CE3/TR13 is a transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for surface mount applications in the DO-214AC (SMA) package. This bidirectional zener diode provides transient overvoltage protection with a 12V reverse standoff voltage and 22V maximum clamping voltage at peak pulse current of 22.7A. The device is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Substitute parts are necessary when the original SMAJ12CE3/TR13 is unavailable, when alternative manufacturers' inventory levels are higher, or when specific performance characteristics better match application requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	12	V
Voltage - Breakdown (Min)	13.3	V
Voltage - Clamping (Max) @ Ipp	22	V
Current - Peak Pulse (10/1000µs)	22.7	A
Power - Peak Pulse	500	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Type	Zener	—
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the SMAJ12CE3/TR13 are qualified based on the following critical parameters that determine functional equivalence:

Electrical Compatibility Criteria:

Voltage - Reverse Standoff (Typ): 12V (all substitutes match)
Voltage - Breakdown (Min): 13.3V (all substitutes match)
Package / Case: DO-214AC, SMA (all substitutes match)
Mounting Type: Surface Mount (all substitutes match)
Type: Zener, Bidirectional (all substitutes match)
RoHS Status: ROHS3 Compliant (all substitutes match)
Moisture Sensitivity Level: 1 (Unlimited) (all substitutes match)

Performance Variation Parameters: Substitute parts differ in the following characteristics while maintaining core electrical compatibility:

Voltage - Clamping (Max) @ Ipp: ranges from 19.9V to 25.3V
Current - Peak Pulse: ranges from 20.1A to 157A
Power - Peak Pulse: ranges from 400W to 600W
Operating Temperature Range: varies by manufacturer
Manufacturer and Series designation

All substitute parts maintain the same reverse standoff voltage (12V) and breakdown voltage (13.3V), ensuring they function within the same protection threshold. Variations in clamping voltage and peak pulse current reflect different manufacturer designs and performance characteristics within the 12V TVS diode category.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Voltage - Reverse Standoff (Typ) [V]	Voltage - Breakdown (Min) [V]	Voltage - Clamping (Max) @ Ipp [V]	Current - Peak Pulse [A]	Power - Peak Pulse [W]	Operating Temperature [°C]	Package	RoHS Status	Inventory [Pcs]
SMAJ12CE3/TR13	Microchip Technology	12	13.3	22	22.7	500	-65 to 150 (TJ)	DO-214AC, SMA	ROHS3 Compliant	1065
SM4T14CAY	STMicroelectronics	12	13.3	25.3	91 (8/20µs)	400	-55 to 150 (TJ)	DO-214AC, SMA	ROHS3 Compliant	5620
SMA6J12CA-TP	Micro Commercial Co	12	13.3	19.9	30.2	600	-55 to 175 (TA)	DO-214AC, SMA	ROHS3 Compliant	36596
SMA6J12CA-TR	STMicroelectronics	12	13.3	23.5	157 (8/20µs)	600	-55 to 175 (TJ)	DO-214AC, SMA	ROHS3 Compliant	20100
SMAJ12CA	MDD	12	13.3	19.9	20.1	400	-50 to 150 (TJ)	DO-214AC, SMA	ROHS3 Compliant	26540
SMAJ12CA-13-F	Diodes Incorporated	12	13.3	19.9	20.1	400	-55 to 150 (TJ)	DO-214AC, SMA	ROHS3 Compliant	7493
SMAJ12CA-TP	Micro Commercial Co	12	13.3	19.9	20.1	400	-55 to 175 (TA)	DO-214AC, SMA	ROHS3 Compliant	9086
SMAJ12CA-TR	STMicroelectronics	12	13.3	25.3	91 (8/20µs)	400	-55 to 150 (TJ)	DO-214AC, SMA	ROHS3 Compliant	4600

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and ROHS3 compliance, ensuring regulatory and environmental conformance equivalent to the SMAJ12CE3/TR13.

Selection based on electrical performance requirements:

Parts with clamping voltage closest to the original 22V specification: SMAJ12CA-TR (25.3V) and SMA6J12CA-TR (23.5V) provide clamping characteristics within 3.3V of the original device.

Parts with clamping voltage lower than the original: SMAJ12CA (19.9V), SMAJ12CA-13-F (19.9V), SMAJ12CA-TP (19.9V), and SMA6J12CA-TP (19.9V) provide reduced clamping voltage, suitable for applications requiring lower voltage suppression thresholds.

Parts with higher peak pulse current capability: SMA6J12CA-TR (157A at 8/20µs) and SM4T14CAY (91A at 8/20µs) offer enhanced transient energy absorption compared to the original 22.7A specification.

Selection based on temperature operating range:

The original SMAJ12CE3/TR13 operates from -65°C to 150°C (TJ). Substitute parts with extended upper temperature limits include SMA6J12CA-TP and SMA6J12CA-TR, both rated to 175°C, providing thermal margin for high-temperature applications.

Selection based on inventory availability:

SMA6J12CA-TP (Micro Commercial Co) offers the highest inventory level at 36,596 pieces, followed by SMA6J12CA-TR (STMicroelectronics) at 20,100 pieces.

Frequently Asked Questions (FAQ)

Q: Can SMAJ12CA-TR substitute for SMAJ12CE3/TR13 in all applications?

A: SMAJ12CA-TR maintains the same reverse standoff voltage (12V), breakdown voltage (13.3V), and package (DO-214AC, SMA). However, it features a higher clamping voltage (25.3V versus 22V) and significantly higher peak pulse current (91A versus 22.7A). Substitution is valid for applications where the higher clamping voltage and current capability do not create circuit incompatibility.

Q: What is the difference between the 10/1000µs and 8/20µs pulse specifications?

A: The pulse waveform specification indicates the test conditions under which peak pulse current is measured. 10/1000µs represents a 10-microsecond rise time and 1000-microsecond decay time, while 8/20µs represents an 8-microsecond rise time and 20-microsecond decay time. These are different standardized test waveforms; parts specified with different waveforms may exhibit different performance under identical real-world transient conditions.

Q: Are all substitute parts available in Tape & Reel packaging?

A: No. SMAJ12CA (MDD) does not specify packaging type in the provided data. SMAJ12CA-13-F (Diodes Incorporated) is available in Cut Tape (CT) & Digi-Reel® packaging. Most other substitutes are available in Tape & Reel (TR) or Cut Tape (CT) & Digi-Reel® formats. Verify packaging requirements with your procurement specification.

Q: Which substitute part has the lowest clamping voltage?

A: SMAJ12CA, SMAJ12CA-13-F, SMAJ12CA-TP, and SMA6J12CA-TP all feature 19.9V clamping voltage, which is 2.1V lower than the original SMAJ12CE3/TR13 at 22V. These parts are suitable for applications requiring lower voltage suppression thresholds.

Q: Is the SMAJ12CE3/TR13 still in production?

A: Yes, the SMAJ12CE3/TR13 maintains Active product status with 1,065 pieces in current inventory.

Q: Can I use SMA6J12CA-TR in place of SMAJ12CE3/TR13 for extended temperature applications?

A: SMA6J12CA-TR operates from -55°C to 175°C (TJ), compared to the original -65°C to 150°C (TJ). This provides a 25°C extension at the upper temperature limit but reduces the lower temperature operating range by 10°C. Substitution is valid only if your application does not require operation below -55°C.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: Moisture Sensitivity Level 1 (Unlimited) indicates the component has no moisture sensitivity restrictions. The device can be stored and handled without special moisture control measures, and there are no time-to-reflow limitations after exposure to ambient humidity.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all substitute parts listed are RoHS3 compliant, matching the compliance status of the original SMAJ12CE3/TR13.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message