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SMAJ26A-M3/61 Equivalent & Substitute Parts
Part Overview
The SMAJ26A-M3/61 is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This surface mount component operates in the DO-214AC (SMA) package and is designed for general-purpose transient voltage suppression applications. The part is Active status and RoHS3 compliant. Equivalent and substitute parts are identified based on matching electrical characteristics and mechanical compatibility to ensure functional interchangeability in circuit protection applications.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 26 | V |
| Voltage - Breakdown (Min) | 28.9 | V |
| Voltage - Clamping (Max) @ Ipp | 42.1 | V |
| Current - Peak Pulse (10/1000µs) | 9.5 | A |
| Power - Peak Pulse | 400 | W |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Package / Case | DO-214AC, SMA | - |
| Mounting Type | Surface Mount | - |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitute parts for the SMAJ26A-M3/61 are grouped based on the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Breakdown (Min): 28.9V
- Voltage - Clamping (Max) @ Ipp: 42.1V (±tolerance acceptable)
- Current - Peak Pulse (10/1000µs): 9.5A (±tolerance acceptable)
- Power - Peak Pulse: 400W
- Package / Case: DO-214AC, SMA
- Mounting Type: Surface Mount
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: 1 (Unlimited)
Parts are classified into two categories:
Category 1: Direct Electrical & Mechanical Equivalents Parts matching all primary substitution criteria with identical or compatible electrical specifications and packaging.
Category 2: Functional Equivalents with Parameter Variations Parts with the same reverse standoff voltage and breakdown voltage but with variations in clamping voltage, peak pulse current, or power dissipation that remain within acceptable operating ranges for general-purpose applications.
Parameter Comparison
| Part Number | Manufacturer | Vr (Typ) V | Vbr (Min) V | Vc (Max) @ Ipp V | Ipp (10/1000µs) A | Ppk W | Temp Range °C | Package | RoHS |
|---|---|---|---|---|---|---|---|---|---|
| SMAJ26A-M3/61 | Vishay | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC (SMA) | ROHS3 |
| SMAJ26A-E3/5A | Vishay | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC (SMA) | ROHS3 |
| SMAJ26A-E3/61 | Vishay | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC (SMA) | ROHS3 |
| SMAJ26A | Meritek | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC (SMA) | ROHS3 |
| SMAJ26A-13-F | Diodes Incorporated | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 150 | DO-214AC (SMA) | ROHS3 |
| SMAJ26A-TP | Micro Commercial Co | 26 | 28.9 | 42.1 | 9.5 | 400 | -55 to 175 | DO-214AC (SMA) | ROHS3 |
| SZ1SMA26AT3G | Littelfuse Inc. | 26 | 28.9 | 42.1 | 9.5 | 400 | -65 to 150 | DO-214AC (SMA) | ROHS3 |
| SM4T30AY | STMicroelectronics | 26 | 28.9 | 53.5 | 43 | 400 | -55 to 150 | DO-214AC (SMA) | ROHS3 |
| SMA6J26A R3G | Taiwan Semiconductor Corporation | 26 | 28.9 | 40.9 | 14.7 | 600 | -55 to 175 | DO-214AC (SMA) | ROHS3 |
Engineering Selection Recommendations
Direct Equivalents (Recommended for 1:1 Replacement):
SMAJ26A-E3/61, SMAJ26A-E3/5A, SMAJ26A-13-F, and SMAJ26A (Meritek) provide identical electrical specifications and packaging to the SMAJ26A-M3/61. These parts are suitable for direct substitution without circuit redesign. All are Active status and RoHS3 compliant.
Extended Temperature Range Alternative:
SMAJ26A-TP (Micro Commercial Co) and SMA6J26A R3G (Taiwan Semiconductor Corporation) offer extended upper operating temperature limits (-55 to 175°C), providing additional thermal margin for applications requiring higher temperature operation. SMA6J26A R3G is discontinued at DiGi Electronics but remains available through alternative channels.
Enhanced Performance Alternative:
SZ1SMA26AT3G (Littelfuse Inc.) provides automotive-grade qualification (AEC-Q101) with extended lower temperature range (-65 to 150°C), suitable for automotive and harsh environment applications. Electrical specifications remain equivalent to the main part.
Higher Current Capacity Alternative:
SM4T30AY (STMicroelectronics) and SMA6J26A R3G offer increased peak pulse current (43A and 14.7A respectively) and higher power dissipation (400W and 600W), providing enhanced transient suppression capability. SM4T30AY features automotive-grade qualification (AEC-Q101). These parts are suitable when circuit protection requirements exceed the 9.5A specification of the main part.
Frequently Asked Questions (FAQ)
Q: Can SMAJ26A-E3/61 replace SMAJ26A-M3/61 directly?
A: Yes. Both parts share identical electrical specifications (26V standoff, 28.9V breakdown, 42.1V clamping, 9.5A peak pulse) and DO-214AC (SMA) packaging. The difference is packaging format: SMAJ26A-M3/61 is supplied in Tape & Reel (TR), while SMAJ26A-E3/61 is supplied in Cut Tape (CT) & Digi-Reel®. Electrical performance is equivalent.
Q: What is the difference between SMAJ26A from different manufacturers?
A: Vishay, Meritek, Diodes Incorporated, and Micro Commercial Co all produce SMAJ26A variants with identical core electrical specifications. Differences exist in packaging formats, temperature ranges, and availability. All are RoHS3 compliant and suitable for general-purpose applications.
Q: When should I use SZ1SMA26AT3G instead of SMAJ26A-M3/61?
A: SZ1SMA26AT3G is recommended for automotive applications or environments requiring AEC-Q101 qualification. It provides extended lower temperature operation (-65°C minimum) and automotive-grade reliability. Electrical specifications remain equivalent to the main part.
Q: Is SM4T30AY a suitable replacement for SMAJ26A-M3/61?
A: SM4T30AY is functionally compatible but not a direct 1:1 replacement. It maintains the same 26V reverse standoff and 28.9V breakdown voltage but features higher clamping voltage (53.5V), significantly higher peak pulse current (43A vs. 9.5A), and automotive qualification. Use SM4T30AY only when enhanced transient suppression capability is required.
Q: What does RoHS3 compliance mean for these parts?
A: RoHS3 compliance indicates the parts meet Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. All listed substitute parts are RoHS3 compliant, ensuring regulatory compliance for EU and similar markets.
Q: Are there packaging considerations when substituting these parts?
A: All listed parts use DO-214AC (SMA) surface mount packaging, ensuring mechanical compatibility on PCBs designed for SMAJ26A-M3/61. Packaging format differences (Tape & Reel vs. Cut Tape) affect supply and handling but not circuit performance.
Q: What is Moisture Sensitivity Level (MSL) 1?
A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All listed parts carry MSL 1 rating, eliminating moisture-related handling constraints during storage and assembly.
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