Request Quote
(Ships tomorrow)
SMAJ12AE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMAJ12AE3/TR13 is a unidirectional transient voltage suppressor (TVS) diode manufactured by Microchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This component features a 12V reverse standoff voltage with a 19.9V maximum clamping voltage and 25.1A peak pulse current capability in a DO-214AC (SMA) package. The part is active in production status and RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).
Substitute parts are identified based on matching electrical characteristics within the 12V protection class, identical package geometry (DO-214AC/SMA), and compatible operating temperature ranges. Equivalent devices maintain the same reverse standoff voltage, breakdown voltage range, and surface-mount form factor while offering comparable or enhanced performance specifications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Manufacturer | Microchip Technology | — |
| Part Number | SMAJ12AE3/TR13 | — |
| Category | Transient Voltage Suppressors (TVS) | — |
| Type | Zener, Unidirectional | — |
| Package | DO-214AC (SMA) | — |
| Voltage - Reverse Standoff (Typ) | 12 | V |
| Voltage - Breakdown (Min) | 13.3 | V |
| Voltage - Clamping (Max) @ Ipp | 19.9 | V |
| Current - Peak Pulse (10/1000µs) | 25.1 | A |
| Power - Peak Pulse | 500 | W |
| Operating Temperature Range | -65 to 150 | °C (TJ) |
| Mounting Type | Surface Mount | — |
| RoHS Status | ROHS3 Compliant | — |
| MSL Rating | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMAJ12AE3/TR13 are classified based on the following electrical and mechanical compatibility criteria:
Primary Matching Criteria:
- Voltage - Reverse Standoff (Typ): 12V
- Voltage - Breakdown (Min): 13.3V
- Package / Case: DO-214AC, SMA
- Mounting Type: Surface Mount
- Type: Zener, Unidirectional
- Unidirectional Channels: 1
Substitution Logic:
Parts are grouped into two categories based on clamping voltage and peak pulse current characteristics:
Group A - Direct Electrical Equivalents (19.9V Clamping): Parts with identical 19.9V maximum clamping voltage and comparable peak pulse current ratings (20.1A to 30.2A). These devices provide equivalent protection performance with minimal circuit impact.
Group B - Enhanced Performance Alternatives (23.5V Clamping): Parts with higher 23.5V maximum clamping voltage and significantly elevated peak pulse current ratings (157A). These devices offer superior transient energy absorption capability and are suitable for applications requiring enhanced protection margins.
All substitute parts maintain the 12V reverse standoff voltage, 13.3V minimum breakdown voltage, and DO-214AC package specification. Operating temperature ranges vary between manufacturers (-55°C to -65°C minimum; 150°C to 175°C maximum), and all parts are RoHS3 compliant with MSL 1 rating.
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) | Operating Temp (°C) | Package |
|---|---|---|---|---|---|---|---|---|
| SMAJ12AE3/TR13 | Microchip Technology | 12 | 13.3 | 19.9 | 25.1 | 500 | -65 to 150 | DO-214AC (SMA) |
| SMA6J12A-E3/61 | Vishay General Semiconductor | 12 | 13.3 | 23.5 | 157 (8/20µs) | 4000 | -55 to 150 | DO-214AC (SMA) |
| SMA6J12A-TP | Micro Commercial Co | 12 | 13.3 | 19.9 | 30.2 | 600 | -55 to 175 | DO-214AC (SMA) |
| SMA6J12A-TR | STMicroelectronics | 12 | 13.3 | 23.5 | 157 (8/20µs) | 600 | -55 to 175 | DO-214AC (SMA) |
| SMAJ12A | Good-Ark Semiconductor | 12 | 13.3 | 19.9 | 20.1 | 400 | -55 to 150 | DO-214AC (SMA) |
| SMAJ12A-13-F | Diodes Incorporated | 12 | 13.3 | 19.9 | 20.1 | 400 | -55 to 150 | DO-214AC (SMA) |
| SMAJ12A-TP | Micro Commercial Co | 12 | 13.3 | 19.9 | 20.1 | 400 | -55 to 175 | DO-214AC (SMA) |
| SMAJ12A-TR | STMicroelectronics | 12 | 13.3 | 25.3 | 91 (8/20µs) | 400 | -55 to 150 | DO-214AC (SMA) |
Engineering Selection Recommendations
Compatibility Assessment:
All listed substitute parts are compatible with the SMAJ12AE3/TR13 application based on matching reverse standoff voltage (12V), breakdown voltage (13.3V minimum), and identical DO-214AC surface-mount package specification. All parts are active in production status and RoHS3 compliant.
Selection Criteria by Application Requirements:
For Direct Replacement with Minimal Circuit Impact: Select parts from Group A (19.9V clamping voltage): SMAJ12A-13-F, SMAJ12A-TP, SMAJ12A, or SMA6J12A-TP. These devices maintain the same clamping voltage as the original SMAJ12AE3/TR13 and are suitable for applications where circuit protection thresholds are established around 19.9V maximum clamp voltage.
For Enhanced Transient Protection: Select parts from Group B (23.5V clamping voltage): SMA6J12A-E3/61 or SMA6J12A-TR. These devices provide higher clamping voltage and significantly increased peak pulse current capability (157A versus 25.1A), offering superior energy absorption for high-transient environments. The trade-off is a higher clamping voltage that may require circuit re-evaluation.
For Extended Temperature Operation: Parts rated to -55°C to 175°C (SMA6J12A-TP, SMAJ12A-TP, SMA6J12A-TR) accommodate wider ambient temperature ranges compared to the original part (-65°C to 150°C). Selection depends on specific thermal requirements.
Inventory and Availability: All substitute parts are available in production quantities. Highest inventory levels are available for SMAJ12A (36,995 pcs) and SMA6J12A-TR (10,200 pcs).
Frequently Asked Questions (FAQ)
Q: Can SMAJ12A-13-F directly replace SMAJ12AE3/TR13 without circuit modification?
A: Yes. Both parts share identical reverse standoff voltage (12V), breakdown voltage (13.3V), clamping voltage (19.9V), and DO-214AC package specification. The SMAJ12A-13-F is rated for -55°C to 150°C operating temperature, matching the upper limit of the original part. Peak pulse current differs slightly (20.1A versus 25.1A), but both are within the 12V protection class specification.
Q: What is the difference between Group A and Group B substitute parts?
A: Group A parts (SMAJ12A-13-F, SMAJ12A-TP, SMAJ12A, SMA6J12A-TP) maintain 19.9V maximum clamping voltage identical to the original SMAJ12AE3/TR13. Group B parts (SMA6J12A-E3/61, SMA6J12A-TR) feature 23.5V clamping voltage with significantly higher peak pulse current (157A). Group B provides enhanced protection but requires circuit validation to confirm the higher clamping voltage is acceptable for the protected circuit.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts are RoHS3 compliant with MSL 1 (unlimited moisture sensitivity level) rating, matching the compliance profile of the original SMAJ12AE3/TR13.
Q: Does the DO-214AC package differ between manufacturers?
A: No. All parts use the identical DO-214AC (SMA) surface-mount package specification. Physical dimensions, lead configuration, and PCB footprint are standardized across all manufacturers listed.
Q: Which substitute part offers the lowest cost alternative?
A: SMAJ12A from Good-Ark Semiconductor provides the lowest power rating (400W) among Group A equivalents with 20.1A peak pulse current. SMAJ12A-13-F from Diodes Incorporated offers identical electrical specifications. Selection should be based on application requirements and supply chain availability rather than cost alone.
Q: Can SMA6J12A-TR (25.3V clamping) be used in place of SMAJ12AE3/TR13 (19.9V clamping)?
A: SMA6J12A-TR from STMicroelectronics features 25.3V clamping voltage, which is higher than the original 19.9V specification. This part is electrically compatible at the 12V protection class level but introduces a higher voltage clamp. Circuit validation is required to confirm the protected circuit can tolerate 25.3V maximum transient voltage without damage or performance degradation.
Q: What is the difference between 10/1000µs and 8/20µs pulse current ratings?
A: Peak pulse current specifications are measured under different transient waveform conditions. The 10/1000µs waveform represents a slower transient pulse, while 8/20µs represents a faster transient. Parts rated with 8/20µs current specifications (SMA6J12A-E3/61, SMA6J12A-TR) are tested under more stringent conditions and typically indicate higher performance capability for fast-rising transients.
Q: Are there packaging format differences between substitute parts?
A: Most substitute parts are available in Tape & Reel (TR) format matching the original SMAJ12AE3/TR13. SMAJ12A and SMAJ12A-13-F are available in Cut Tape (CT) and Digi-Reel® formats. Packaging format does not affect electrical performance; selection depends on assembly process requirements and reel compatibility with pick-and-place equipment.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts