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STMicroelectronics SMA6J26A-TR
- Part No.:
- SMA6J26A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J26A-TR.pdf
- Description:
- TVS DIODE 26VWM 47.9VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:2,485
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Product details
Overview
SMA6J26A-TR from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for ESD and surge protection in low-voltage DC power rails and signal lines. It features a 26 V stand-off voltage (VRM), 40.9 V maximum clamping voltage at 14.9 A (8/20 µs), 0.2 µA leakage at 25 °C, and operates up to 175 °C junction temperature - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the SMA6J26A-TR datasheet, SMA6J26A-TR pinout, SMA6J26A-TR application, or SMA6J26A-TR equivalent, key selection criteria include clamping performance under IEC 61000-4-2 (30 kV contact/air discharge) and IEC 61000-4-4 level 4 (4 kV), thermal robustness at Tj = 175 °C, low dynamic resistance (0.6 Ω), and SMA package compatibility with IPC7531 footprints.
Technical Context
This TVS diode uses planar silicon technology to achieve stable breakdown characteristics and low leakage across temperature. Its unidirectional configuration provides asymmetric clamping-forward conduction during overvoltage events on the cathode side-enabling precise rail-to-rail protection without reverse conduction path concerns.
The device meets JEDEC DO-214AC (SMA) mechanical standards and complies with J-STD-020 MSL Level 1, UL94 V0 resin, and JESD-201 Class 2 whisker resistance. Its thermal impedance (Zth(j-a)) is optimized for FR4 PCBs with recommended copper area, supporting reliable energy dissipation during repetitive transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRM) | 26 V - Maximum continuous reverse operating voltage before breakdown; sets protection threshold for 24 V nominal systems. |
| Breakdown Voltage (VBR) | 28.9–31.9 V at 1 mA - Tight tolerance ensures consistent triggering across production lots and temperature. |
| Clamping Voltage (VCL) | 40.9 V at 14.9 A (8/20 µs) - Limits peak voltage seen by downstream ICs during surge events. |
| Peak Pulse Power | 600 W (10/1000 µs) - Sustains standard lightning-surge energy without degradation in telecom or industrial interfaces. |
| Leakage Current (IRM) | 0.2 µA at 25 °C - Minimizes standby power loss in battery-backed or low-power sensor nodes. |
| Junction Temperature Range | −55 to +175 °C - Enables deployment in under-hood automotive or high-ambient industrial environments. |
| Dynamic Resistance (RD) | 0.6 Ω - Low impedance maintains tight clamping under high-current transients, reducing voltage overshoot. |
Pinout & Package
The SMA6J26A-TR is housed in a JEDEC DO-214AC (SMA) surface-mount package with two terminals: anode and cathode. The package measures 4.80–5.35 mm (E) × 2.25–2.90 mm (D) × 1.90–2.45 mm (A1) and features matte tin-plated leads compliant with J-STD-002 and MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; defines reference for unidirectional clamping action. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when voltage exceeds VRM. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | 30 kV air/contact discharge - exceeds Level 4, eliminating need for external ESD filters in USB or CAN interfaces. |
| IEC 61000-4-4 surge immunity | 4 kV (Level 4) - protects against fast transient bursts in industrial PLC I/O modules and motor drives. |
| Low junction capacitance | ~200 pF at 1 V reverse bias - preserves signal integrity in 1 Mbps RS-485 or LIN bus applications. |
| High-temperature reliability | 175 °C max Tj - supports long-term operation in enclosed enclosures without derating. |
| UL94 V0 resin housing | Flame-retardant epoxy - satisfies safety requirements for industrial control panels and medical equipment. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamp limiting transient voltage to ≤41 V during 600 W surges. Use Value: Prevents damage to upstream DC-DC controllers and downstream microcontrollers by clamping within safe SOA limits. | Use Scenario: LIN bus line in door module subjected to ESD events during assembly and field use. IC Role / Device Role / Timing Role: Fast-response surge suppressor absorbing 30 kV ESD pulses with sub-nanosecond turn-on. Use Value: Maintains LIN communication integrity without signal distortion due to low 200 pF capacitance at 1 V bias. |
| Telecom Interface Protection | Smart Meter Power Rail |
Use Scenario: RS-485 transceiver interface in outdoor base station equipment subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VCC and data lines, coordinated with secondary MOV/GDT stages. Use Value: Delivers repeatable 600 W (10/1000 µs) clamping performance without parameter drift after 1000+ surge events. | Use Scenario: 24 V auxiliary power rail in utility smart meter exposed to grid transients and capacitor-switching spikes. IC Role / Device Role / Timing Role: Standoff-rated protector maintaining <0.2 µA leakage to avoid battery drain in backup mode. Use Value: Ensures >10-year field life under thermal cycling (−40 to +85 °C ambient) with no leakage-induced calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMA6J26CA-TR | Bidirectional variant; symmetric clamping (±26 V standoff); higher capacitance (~250 pF). | Required for AC-coupled or differential signal lines (e.g., RS-422) where polarity reversal occurs. | Select only if bidirectional protection is mandated by signal topology; otherwise, unidirectional offers lower leakage and capacitance. |
| SMBJ26A | Same electrical specs but SMB package (DO-214AA); 30% larger footprint; higher thermal mass. | Suitable where board space allows and higher surge margin (600 W same rating) with improved heat spreading is needed. | Prefer SMA6J26A-TR for space-constrained designs; choose SMBJ26A only when thermal derating or manual rework access is critical. |
Compared with SMA6J26CA-TR and SMBJ26A, the SMA6J26A-TR delivers optimal balance of compact DO-214AC packaging, ultra-low leakage, and proven 175 °C operation - making it preferred for high-density, high-reliability 24 V system protection where unidirectional clamping suffices.
Availability
SMA6J26A-TR is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom interface protection, and smart meter power rail applications requiring stable component supply and full traceability.
Supply support for SMA6J26A-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing analog, microcontroller, power, and sensing solutions for industrial, automotive, and consumer markets.
The SMA6J series belongs to ST's transient protection product line, engineered specifically for high-reliability ESD and surge suppression in harsh-environment applications where thermal stability and low leakage are critical design constraints.
FAQ
What is the maximum clamping voltage of SMA6J26A-TR under a 14.9 A 8/20 µs surge?
The maximum clamping voltage is 40.9 V at 14.9 A for an 8/20 µs waveform, measured per IEC 61000-4-5 test conditions. This value is guaranteed across the full operating temperature range and reflects worst-case device behavior under standardized surge stress.
Does SMA6J26A-TR meet automotive qualification standards such as AEC-Q101?
No - SMA6J26A-TR is not AEC-Q101 qualified. It is rated for industrial and general-purpose applications with Tj up to 175 °C and meets IEC/UL safety standards, but lacks the extended reliability testing (e.g., HTGB, H3TRB) required for automotive-grade certification.
Can SMA6J26A-TR be used in parallel to increase surge current handling?
Not recommended without current-sharing design. Due to process variation in VBR, paralleling units causes uneven current distribution - one device may absorb >80% of the surge, leading to premature failure. Use a single higher-rated device (e.g., SMA10J26A) instead.
What is the recommended PCB footprint for SMA6J26A-TR according to ST?
ST specifies a footprint matching IPC7531: pad length 5.43 mm (2.63 mm center-to-center), pad width 1.40 mm, and solder mask opening aligned to DO-214AC outline. Thermal relief via placement under pads is advised to enhance heat dissipation during surge events.
SMA6J26A-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AC, SMA
- Series:
- SMA6J, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 47.9V
- Current - Peak Pulse (10/1000µs):
- 75A (8/20µs)
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMA6J26A-TR FAQ
1.How can I place an order for SMA6J26A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J26A-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMA6J26A-TR reliable?
The price and inventory of SMA6J26A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J26A-TR is usually 5 days.
3.What payment methods are accepted for SMA6J26A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J26A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J26A-TR?
SMA6J26A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J26A-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMA6J26A-TR?
For technical support, including SMA6J26A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J26A-TR requirements.
6.How does Aetrix verify that SMA6J26A-TR is sourced from the original manufacturer or authorized distributors?
All SMA6J26A-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMA6J26A-TR meets industry standards.
7.What is the process for return or replacement of SMA6J26A-TR?
All SMA6J26A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J26A-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMA6J26A-TR part is unused and in its original packaging.
Return procedure for SMA6J26A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J26A-TR Tags
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