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SMAJ26CE3/TR13 Equivalent & Substitute Parts
Part Overview
The SMAJ26CE3/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 operates with a reverse standoff voltage of 26V and provides transient overvoltage protection with a peak pulse current rating of 10.7A at 10/1000µs pulse duration. The component is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1).
Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within the same application category.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 26 | V |
| Voltage - Breakdown (Min) | 28.9 | V |
| Voltage - Clamping (Max) @ Ipp | 46.6 | V |
| Current - Peak Pulse (10/1000µs) | 10.7 | 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 | — |
| MSL Rating | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitute parts for the SMAJ26CE3/TR13 are qualified based on the following critical parameters that determine functional equivalence:
Primary Matching Criteria:
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Breakdown (Min): 28.9V
- Package / Case: DO-214AC, SMA
- Mounting Type: Surface Mount
- Type: Zener
- Bidirectional Channels: 1
- RoHS Status: ROHS3 Compliant
- MSL Rating: 1 (Unlimited)
Secondary Compatibility Parameters:
- Voltage - Clamping (Max) @ Ipp: Range 42.1V to 53.5V (acceptable variation within transient suppression application requirements)
- Current - Peak Pulse (10/1000µs): Range 9.5A to 75A (higher ratings provide enhanced protection margin)
- Power - Peak Pulse: Range 400W to 600W (higher ratings provide enhanced protection margin)
- Operating Temperature Range: Minimum -55°C to maximum 175°C (encompasses or exceeds the primary part specification)
All substitute parts maintain identical voltage standoff and breakdown specifications, ensuring direct functional compatibility in circuit protection applications. Variations in clamping voltage, peak pulse current, and power dissipation represent enhanced or equivalent performance characteristics suitable for the same application 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 Temperature (°C) | Package | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| SMAJ26CE3/TR13 | Microchip Technology | 26 | 28.9 | 46.6 | 10.7 | 500 | -65 to 150 | DO-214AC, SMA | ROHS3 Compliant |
| SM4T30CAY | STMicroelectronics | 26 | 28.9 | 53.5 | 43 (8/20µs) | 400 | -55 to 150 | DO-214AC, SMA | ROHS3 Compliant |
| SMA6J26CA-TR | STMicroelectronics | 26 | 28.9 | 47.9 | 75 (8/20µs) | 600 | -55 to 175 | DO-214AC, SMA | ROHS3 Compliant |
| SMAJ26CA | MDD | 26 | 28.9 | 42.1 | 9.5 | 400 | -50 to 150 | DO-214AC, SMA | ROHS3 Compliant |
| SMAJ26CA-13-F | Diodes Incorporated | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC, SMA | ROHS3 Compliant |
| SMAJ26CA-E3/5A | Vishay General Semiconductor - Diodes Division | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC, SMA | ROHS3 Compliant |
| SMAJ26CA-E3/61 | Vishay General Semiconductor - Diodes Division | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC, SMA | ROHS3 Compliant |
| SMAJ26CA-TP | Micro Commercial Co | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 175 | DO-214AC, SMA | ROHS3 Compliant |
| SMAJ26CA-TR | STMicroelectronics | 26 | 28.9 | 53.5 | 43 (8/20µs) | 400 | -55 to 150 | DO-214AC, SMA | ROHS3 Compliant |
Engineering Selection Recommendations
All identified substitute parts maintain Active product status and RoHS3 compliance, ensuring regulatory and environmental conformance equivalent to the primary SMAJ26CE3/TR13 component.
Direct Electrical Equivalents (Identical Peak Pulse Current): The SMAJ26CA variants from MDD, Diodes Incorporated, and Vishay (SMAJ26CA-E3/5A and SMAJ26CA-E3/61) provide 9.5A peak pulse current, matching the primary part specification. These components are suitable for applications requiring identical current handling characteristics with clamping voltage of 42.1V.
Enhanced Performance Substitutes (Higher Peak Pulse Current): The SM4T30CAY and SMAJ26CA-TR from STMicroelectronics provide 43A peak pulse current with clamping voltages of 53.5V, representing enhanced transient suppression capability. These components are suitable for applications where higher transient energy absorption is beneficial or required.
The SMA6J26CA-TR from STMicroelectronics provides the highest peak pulse current rating of 75A with 47.9V clamping voltage and extended operating temperature range to 175°C, suitable for demanding thermal and transient protection environments.
Temperature Range Considerations: Components with extended upper operating temperature limits (-55 to 175°C) include SMA6J26CA-TR, SMAJ26CA-TP, and SM4T30CAY. The primary part operates to 150°C maximum junction temperature. Selection of extended-range variants is appropriate for high-temperature applications.
Packaging and Supply Format: All substitute parts are available in DO-214AC (SMA) surface mount package. Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging options are available across multiple manufacturers, supporting automated assembly and manual component handling requirements.
Frequently Asked Questions (FAQ)
Q: Can SMAJ26CA variants be used as direct replacements for SMAJ26CE3/TR13?
A: Yes. SMAJ26CA variants from MDD, Diodes Incorporated, and Vishay (SMAJ26CA-E3/5A, SMAJ26CA-E3/61, SMAJ26CA-TP) are direct electrical equivalents with identical 26V reverse standoff voltage, 28.9V breakdown voltage, and 9.5A peak pulse current. All maintain DO-214AC (SMA) package compatibility and RoHS3 compliance.
Q: What is the difference between the 10.7A and 9.5A peak pulse current ratings?
A: The SMAJ26CE3/TR13 provides 10.7A peak pulse current at 10/1000µs pulse duration, while SMAJ26CA variants provide 9.5A. This 1.2A difference represents a 12% reduction in peak current handling. For applications operating at or near the 10.7A specification limit, the primary part or higher-rated alternatives (43A or 75A variants) are recommended.
Q: Are STMicroelectronics SM4T30CAY and SMAJ26CA-TR suitable substitutes despite higher peak pulse current ratings?
A: Yes. Both components maintain the required 26V reverse standoff voltage and 28.9V breakdown voltage. The 43A peak pulse current rating represents enhanced transient suppression capability and is compatible with applications designed for the SMAJ26CE3/TR13. Higher current ratings do not create incompatibility; they provide additional protection margin.
Q: What is the significance of clamping voltage variation between 42.1V and 53.5V?
A: Clamping voltage determines the maximum voltage presented to protected circuitry during transient events. The primary part clamps at 46.6V maximum. Substitute parts range from 42.1V (lower clamping, tighter protection) to 53.5V (higher clamping, relaxed protection). Selection depends on downstream component voltage ratings and transient immunity specifications. Lower clamping voltages provide more aggressive protection; higher clamping voltages reduce power dissipation in the TVS diode.
Q: Can I use SMA6J26CA-TR in place of SMAJ26CE3/TR13 in a temperature-critical application?
A: Yes. SMA6J26CA-TR operates from -55°C to 175°C junction temperature, exceeding the primary part specification of -65°C to 150°C. The extended upper temperature limit (175°C vs. 150°C) is advantageous for high-temperature environments. The lower minimum temperature limit (-55°C vs. -65°C) is acceptable for most industrial applications but should be verified against specific low-temperature requirements.
Q: Are all substitute parts available in Tape & Reel packaging?
A: Tape & Reel (TR) packaging is available for SMAJ26CE3/TR13, SMA6J26CA-TR, SMAJ26CA-E3/5A, SMAJ26CA-TP, and SMAJ26CA-TR. Cut Tape (CT) & Digi-Reel® packaging is available for SMAJ26CA-E3/61 and SMAJ26CA-TR. MDD SMAJ26CA does not specify packaging format. Verify packaging availability with component suppliers for automated assembly requirements.
Q: What is the difference between 10/1000µs and 8/20µs pulse duration specifications?
A: These represent different standard test pulse waveforms. The primary part is rated at 10/1000µs (10µs rise time, 1000µs pulse width), while some STMicroelectronics substitutes are rated at 8/20µs (8µs rise time, 20µs pulse width). Both are industry-standard test conditions. The 8/20µs waveform represents a faster transient event. Peak current ratings under different pulse durations are not directly comparable; however, both specifications ensure adequate transient suppression for general-purpose applications.
Q: Is the SMAJ26CE3/TR13 suitable for power line protection applications?
A: No. The primary part specification indicates "Power Line Protection: No." All identified substitute parts also specify "Power Line Protection: No." These components are classified for general-purpose transient suppression. Power line protection applications require components specifically rated and certified for mains voltage transient suppression.
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