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STMicroelectronics SMC50J6.5A
- Part No.:
- SMC50J6.5A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J6.5A.pdf
- Description:
- 5000 W, 6.5 V TVS IN SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,880
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Product details
Overview
SMC50J6.5A from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for primary-level ESD and surge protection on DC power rails and low-speed signal lines. It features a 6.5 V standoff voltage (VRM), 11.2 V clamping voltage at 447 A (8/20 μs), 5000 W peak pulse power (10/1000 μs), and operates up to 175 °C junction temperature-ideal for automotive infotainment power inputs and industrial PLC I/O modules.
For engineers reviewing the SMC50J6.5A datasheet, SMC50J6.5A pinout, SMC50J6.5A application, or SMC50J6.5A equivalent, key selection criteria include its low 0.2 µA leakage at 25 °C, JEDEC-registered SMC package compatibility with IPC-7531 footprints, IEC 61000-4-2 ±30 kV contact discharge rating, and dynamic resistance of 3.63 mΩ enabling fast response under high-current transients.
Technical Context
This TVS diode uses planar silicon junction technology optimized for low leakage and high thermal robustness. Its unidirectional configuration provides asymmetric clamping-forward conduction only during negative transients-making it suitable for polarity-sensitive DC supply protection where reverse blocking is required.
The device meets IEC 61000-4-4 Level 4 (4 kV) surge immunity and exceeds IEC 61000-4-2 Level 4 for both air and contact discharge. Its 175 °C maximum operating junction temperature and MSL Level 1 rating support reflow-soldered deployment in high-reliability industrial and automotive environments without derating concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 6.5 V - Blocks normal operation up to rated DC voltage before entering avalanche conduction. |
| Clamping Voltage (VCL) | 11.2 V at 447 A (8/20 μs) - Limits transient voltage seen by downstream circuitry to safe levels during surge events. |
| Peak Pulse Power | 5000 W (10/1000 μs) - Sustains high-energy surges typical of lightning-induced coupling in industrial wiring. |
| Leakage Current | 0.2 µA at 25 °C - Minimizes standby power loss and avoids false triggering in battery-powered or low-power sensor nodes. |
| Junction Temperature Range | –55 °C to +175 °C - Enables use in under-hood automotive ECUs and high-ambient industrial motor drives. |
| Dynamic Resistance (RD) | 3.63 mΩ - Low impedance ensures rapid voltage clamping and minimal overshoot during fast-rising transients. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - Provides system-level ESD immunity without external shielding or filtering. |
Pinout & Package
SMC50J6.5A is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads. The package measures 5.55–6.25 mm × 7.75–8.15 mm × 2.45 mm max height and supports IPC-7531 compliant footprint layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current entry terminal during forward-biased surge | Connected to protected line (e.g., VBUS); conducts during negative transients relative to cathode. |
| Cathode (K) | Current exit terminal; defines polarity | Connected to ground or lower-potential rail; marked with cathode bar per Table 6 (marking "EAL"). |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous operation up to 175 °C junction temperature-enables placement near heat sources like power MOSFETs or transformers. |
| Low dynamic resistance | 3.63 mΩ enables sub-10 ns response time and tight clamping control across wide current ranges (100–447 A). |
| JEDEC-compliant SMC package | Ensures mechanical interoperability with standard pick-and-place equipment and automated optical inspection (AOI) systems. |
| UL94 V0 flammability rating | Confirms polymer housing meets stringent fire-safety requirements for enclosed industrial enclosures and automotive junction boxes. |
| MSL Level 1 moisture sensitivity | Allows indefinite floor life at ambient conditions-eliminates baking requirements prior to reflow soldering. |
Applications
| Automotive Infotainment Power Input | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting 5–12 V power rails feeding head unit microcontrollers and display drivers against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed directly at connector entry point before bulk capacitance and LDO regulators. Use Value: Clamps 11.2 V at 447 A (8/20 μs), preventing latch-up or gate oxide damage in downstream 3.3 V logic ICs during 100 V/50 ms transients. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to field-wiring inductive kickback and ESD. IC Role / Device Role / Timing Role: Unidirectional shunt protector mounted between input terminal and common return, absorbing energy before optocoupler input stage. Use Value: 0.2 µA leakage avoids false triggering of high-impedance input comparators; 175 °C rating supports operation inside sealed control cabinets. |
| Medical Patient Monitor Sensor Interface | Smart Building HVAC Controller Power Rail |
|
Use Scenario: Shielding analog front-end circuits connected to ECG/SpO₂ sensors from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: First-line ESD suppressor on sensor cable shield and signal lines, placed adjacent to connector to minimize trace inductance. Use Value: ±30 kV IEC 61000-4-2 rating meets IEC 60601-1-2 medical EMC requirements; low capacitance (<100 pF) preserves signal integrity in <1 MHz biopotential bands. |
Use Scenario: Securing 24 V auxiliary power supply feeding Wi-Fi/BLE modules and relay drivers in networked HVAC controllers installed in attics or basements. IC Role / Device Role / Timing Role: DC bus protector on secondary-side output of isolated flyback converter, absorbing surges induced by nearby AC line switching. Use Value: 5000 W (10/1000 μs) rating handles repetitive 1 kV/500 A surges from shared building grounding; matte tin plating ensures long-term solder joint reliability in humid environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.5A (STMicroelectronics) | Same VRM and VCL, but 600 W (10/1000 μs) rating - 83% lower peak power than SMC50J6.5A. | Intended for lower-energy signal-line protection; unsuitable for power rail surge suppression above 1 kV. | Select SMBJ6.5A only when space constraints prohibit SMC package and surge threat level is limited to IEC 61000-4-2 only. |
| 1.5KE6.8A (ON Semiconductor) | Through-hole DO-201 package; 1500 W (10/1000 μs); 12.7 V clamping at 118 A - higher VCL and lower IPP than SMC50J6.5A. | Requires manual or wave soldering; lacks MSL Level 1 and IEC 61000-4-2 ±30 kV certification. | Choose only for legacy through-hole designs where board real estate allows larger footprint and reflow compatibility is not required. |
Compared with SMBJ6.5A and 1.5KE6.8A, SMC50J6.5A delivers 8.3× higher surge power handling in an MSL Level 1 SMT package with certified ±30 kV ESD immunity-making it the sole option for compact, high-reliability 24 V industrial power rail protection requiring zero derating at 125 °C ambient.
Availability
SMC50J6.5A is available at Aetrix Electronics and suitable for automotive infotainment power inputs, industrial PLC digital I/O protection, and medical patient monitor sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMC50J6.5A 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, specializing in power management, analog, MEMS, and microcontroller technologies for industrial, automotive, and consumer markets.
The SMC50J series belongs to ST's high-power TVS diode product line, engineered specifically for robust DC power rail protection in harsh environments where thermal stability, surge resilience, and ESD immunity are non-negotiable design requirements.
FAQ
What is the maximum clamping voltage of SMC50J6.5A under a 447 A 8/20 μs surge?
The maximum clamping voltage (VCL) is 11.2 V at 447 A for an 8/20 μs waveform, measured at 25 °C ambient. This value increases with junction temperature at a coefficient of 10⁻⁴/°C, reaching approximately 11.5 V at 125 °C junction temperature per the αT parameter in Table 2.
Can SMC50J6.5A be used in bidirectional signal line protection?
No - SMC50J6.5A is unidirectional and only clamps negative transients relative to its cathode. For bidirectional protection, ST offers the SMC50J6.5CA variant, which provides symmetrical clamping for AC-coupled or floating signal lines such as RS-485 or CAN bus stubs.
Does SMC50J6.5A require derating at elevated ambient temperatures?
Yes - while the device supports up to 175 °C junction temperature, its peak pulse power must be derated above 25 °C ambient per Figure 3. At 100 °C ambient, the 10/1000 μs pulse power drops to ~3200 W; full 5000 W rating applies only when Tj initial ≤ 25 °C.
What is the recommended PCB footprint for SMC50J6.5A?
The recommended footprint matches IPC-7531 standards for SMC packages: pad length 5.11 mm, pad width 1.54 mm, center-to-center spacing 8.19 mm, and copper area per lead ≥ 3.14 cm² to maintain Rth(j-a) ≤ 100 °C/W per Figure 12. Thermal vias under pads are advised for high-reliability applications.
SMC50J6.5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC50J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.5V (Max)
- Voltage - Breakdown (Min):
- 7.2V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 447A
- Power - Peak Pulse:
- 5000W (5kW)
- 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:
- SMC
SMC50J6.5A FAQ
1.How can I place an order for SMC50J6.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J6.5A 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 SMC50J6.5A reliable?
The price and inventory of SMC50J6.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J6.5A is usually 5 days.
3.What payment methods are accepted for SMC50J6.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J6.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J6.5A?
SMC50J6.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J6.5A 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 SMC50J6.5A?
For technical support, including SMC50J6.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J6.5A requirements.
6.How does Aetrix verify that SMC50J6.5A is sourced from the original manufacturer or authorized distributors?
All SMC50J6.5A 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 SMC50J6.5A meets industry standards.
7.What is the process for return or replacement of SMC50J6.5A?
All SMC50J6.5A units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J6.5A, 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 SMC50J6.5A part is unused and in its original packaging.
Return procedure for SMC50J6.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J6.5A Tags
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