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STMicroelectronics SMA6J15A-TR
- Part No.:
- SMA6J15A-TR
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMA6J15A-TR.pdf
- Description:
- TVS DIODE 15VWM 27.7VC SMA
- Quantity:
- Payment:
- Shipping:
Inventory:14,803
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Product details
Overview
SMA6J15A-TR from STMicroelectronics is a unidirectional 600 W transient voltage suppression (TVS) diode designed for ESD and surge protection in DC power rails and signal lines. It features a 15 V standoff voltage (VRM), 23.6 V clamping voltage at 25.1 A (10/1000 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 SMA6J15A-TR datasheet, SMA6J15A-TR pinout, SMA6J15A-TR application, or SMA6J15A-TR equivalent, key selection criteria include clamping performance under IEC 61000-4-2 (30 kV contact/air discharge), thermal robustness at high Tj, low-leakage behavior across temperature, and compatibility with IPC7531-compliant SMA footprints.
Technical Context
This TVS diode uses planar silicon technology to achieve stable breakdown characteristics and low dynamic resistance (0.206 Ω at 25 °C), enabling precise clamping during fast transients. Its unidirectional configuration supports anode-to-cathode polarity protection on positive-rail circuits without reverse conduction.
The device meets IEC 61000-4-4 Level 4 (4 kV), exceeds IEC 61000-4-2 Level 4 (30 kV air/contact), and complies with J-STD-020 MSL Level 1 - confirming suitability for lead-free reflow without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 15 V - maximum continuous reverse operating voltage before avalanche conduction begins |
| Clamping Voltage (VCL) | 23.6 V at 25.1 A (10/1000 µs) - peak voltage seen by protected circuit during rated surge |
| Peak Pulse Power (PPP) | 600 W (10/1000 µs) - energy-handling capability for standard lightning/surge waveforms |
| Leakage Current (IRM) | ≤0.2 µA at 25 °C - minimal standby power loss and signal integrity impact in high-impedance nodes |
| Junction Temperature Range | −55 °C to +175 °C - enables deployment in under-hood automotive and industrial motor drive environments |
| Dynamic Resistance (RD) | 0.206 Ω at 25 °C - determines voltage rise above VBR under surge current, critical for low-clamp design |
Pinout & Package
The SMA6J15A-TR is housed in a JEDEC DO-214AC (SMA) surface-mount package with two terminals: Cathode (marked band) and Anode. The package conforms to IPC7531 footprint standards and supports automated placement and reflow soldering per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient current to ground when VLINE > VBR |
| Anode | Reference/ground return path | Tied to system ground or low-impedance return plane; completes clamping current loop |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | 30 kV contact & air discharge - eliminates need for external ESD filters in USB, CAN, or sensor interfaces |
| Low leakage at elevated Tj | 1 µA max at 85 °C - preserves battery life and avoids false triggering in always-on monitoring circuits |
| High-temperature operation | 175 °C max Tj - supports placement near heat sources (e.g., MOSFETs, inductors) without derating |
| UL94 V0 resin housing | Flame-retardant encapsulation - satisfies safety requirements for industrial and transportation equipment |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V digital input channels from induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between field input and microcontroller GPIO. Use Value: Limits transient voltage to ≤23.6 V during 1 kV/µs ring wave events, preventing MCU latch-up or damage. |
Use Scenario: Safeguarding LIN bus transceiver power pins against load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary rail protector on VCC supply of LIN PHY IC. Use Value: Withstands 600 W (10/1000 µs) surges while maintaining <0.2 µA leakage to avoid battery drain in sleep mode. |
| DC Power Supply Input Stage | Smart Meter Communication Interface |
Use Scenario: Secondary overvoltage protection after primary MOV stage in 48 V telecom power entry. IC Role / Device Role / Timing Role: Fast-response clamping device parallel to bulk capacitor on DC input rail. Use Value: Clamps 4 kV IEC 61000-4-4 bursts within 1 ns, reducing downstream filter component stress and size. |
Use Scenario: ESD hardening of RS-485 transceiver data lines in utility meter communication ports. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS (paired with complementary device) on differential pair. Use Value: Delivers 30 kV ESD protection without adding capacitance (>100 pF) that would degrade 10 Mbps RS-485 signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-TR | Same VRM (15 V), but lower PPP = 400 W (10/1000 µs); higher VCL = 24.4 V at 22.5 A | Limited to lower-energy surge environments (e.g., consumer electronics); not suitable for industrial 600 W compliance testing | Select only if system-level surge testing does not require full 600 W margin and board space is constrained. |
| 1.5SMC15A-T3G | Higher PPP = 1500 W (10/1000 µs); larger SMC package (DO-214AB); VCL = 24.4 V at 61.5 A | Requires larger PCB footprint and higher thermal mass; better for high-reliability power supply front-ends | Choose when surge threat level exceeds 600 W or when legacy SMC footprint is standardized across platform. |
Compared with SMAJ15A-TR and 1.5SMC15A-T3G, the SMA6J15A-TR delivers optimal balance of compact SMA footprint, 600 W rating, and low-leakage performance - making it preferred for space-constrained industrial and automotive modules requiring both ESD and surge resilience.
Availability
SMA6J15A-TR is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, and DC power supply input stages requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMA6J15A-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, delivering intelligent power, sensing, and control solutions for automotive, industrial, and consumer markets.
The SMA6J series belongs to ST's high-reliability TVS portfolio, engineered specifically for harsh-environment surge and ESD protection where extended temperature operation and low leakage are mandatory.
FAQ
What is the maximum clamping voltage of SMA6J15A-TR under a 10/1000 µs surge?
The maximum clamping voltage is 23.6 V at 25.1 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases with junction temperature due to the αT coefficient (10 × 10−4/°C), reaching ~25.1 V at 125 °C.
Can SMA6J15A-TR be used in bidirectional signal line protection?
No - SMA6J15A-TR is unidirectional and conducts only when cathode voltage exceeds anode by ≥VBR. For bidirectional protection (e.g., RS-485, USB), use SMA6J15CA-TR or pair two SMA6J15A-TR devices in series opposition.
Does this device meet automotive AEC-Q200 qualification?
No - SMA6J15A-TR is not AEC-Q200 qualified. While it operates up to +175 °C and passes JESD22-B102 E3 solderability, it lacks the full stress test suite (temperature cycling, vibration, etc.) required for automotive-grade qualification.
What is the recommended PCB footprint for SMA6J15A-TR?
The recommended footprint follows IPC7531 for DO-214AC (SMA), with pad dimensions of 1.40 mm × 2.63 mm (0.055″ × 0.104″), center-to-center spacing of 5.43 mm (0.214″), and 1.64 mm (0.065″) solder mask opening - matching ST's Figure 14 layout.
SMA6J15A-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 27.7V
- Current - Peak Pulse (10/1000µs):
- 123A (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)
SMA6J15A-TR FAQ
1.How can I place an order for SMA6J15A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for SMA6J15A-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 SMA6J15A-TR reliable?
The price and inventory of SMA6J15A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMA6J15A-TR is usually 5 days.
3.What payment methods are accepted for SMA6J15A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMA6J15A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMA6J15A-TR?
SMA6J15A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMA6J15A-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 SMA6J15A-TR?
For technical support, including SMA6J15A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMA6J15A-TR requirements.
6.How does Aetrix verify that SMA6J15A-TR is sourced from the original manufacturer or authorized distributors?
All SMA6J15A-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 SMA6J15A-TR meets industry standards.
7.What is the process for return or replacement of SMA6J15A-TR?
All SMA6J15A-TR units undergo pre-shipment inspection (PSI). If there is an issue with SMA6J15A-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 SMA6J15A-TR part is unused and in its original packaging.
Return procedure for SMA6J15A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMA6J15A-TR Tags
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