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STMicroelectronics SMC50J6.0CA
- Part No.:
- SMC50J6.0CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J6.0CA.pdf
- Description:
- Linear IC's
- Quantity:
- Payment:
- Shipping:
Inventory:2,512
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Product details
Overview
SMC50J6.0CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It delivers 5000 W peak pulse power (10/1000 µs), clamps at 10.3 V (max) under 486 A surge current, and operates up to 175 °C junction temperature - enabling robust protection in automotive infotainment power supplies and industrial I/O interfaces.
For engineers reviewing the SMC50J6.0CA datasheet, SMC50J6.0CA pinout, SMC50J6.0CA application, or SMC50J6.0CA equivalent, key selection criteria include bidirectional standoff voltage (6.0 V), low leakage (≤0.2 µA at 25 °C), JEDEC-registered SMC package compatibility, and IEC 61000-4-2 ±30 kV contact/air discharge compliance.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide symmetric clamping for both polarities, with a typical breakdown voltage of 6.7 V at 10 mA and dynamic resistance of 3.57 mΩ. Its thermal design supports continuous operation at Tj = 175 °C, validated per JESD22-A103 and MIL-STD-750 Method 2026.
The device meets IEC 61000-4-4 Level 4 (4 kV fast transient burst) and exceeds IEC 61000-4-2 Level 4 for ESD immunity. Its low capacitance (<1000 pF at 0 V, f = 1 MHz) and minimal leakage ensure signal integrity in high-speed analog and digital interfaces without loading effects.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 6.0 V - Maximum continuous reverse operating voltage before significant leakage begins. |
| Breakdown Voltage (VBR) | 6.7–7.4 V @ 10 mA - Ensures reliable triggering during overvoltage transients while avoiding false trips. |
| Clamping Voltage (VCL) | 10.3 V @ 486 A (10/1000 µs) - Limits downstream circuit voltage to safe levels during surge events. |
| Peak Pulse Power | 5000 W (10/1000 µs) - Sustains high-energy surges common in automotive load-dump and industrial switching noise. |
| Leakage Current (IRM) | ≤0.2 µA @ VRM, 25 °C - Prevents battery drain and signal distortion in always-on systems. |
| Junction Temperature Range | −55 °C to +175 °C - Enables deployment in under-hood automotive and high-ambient industrial environments. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - Exceeds Level 4 for direct human-body ESD protection. |
Pinout & Package
SMC50J6.0CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads and MSL Level 1 moisture sensitivity. The bidirectional configuration has no polarity marking beyond the cathode bar on one end, indicating symmetrical terminal function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles; voltage clamping occurs regardless of polarity - essential for AC-coupled or floating signal lines. |
| Cathode bar marking | Manufacturing orientation indicator | Identifies lead 1 per JEDEC outline; does not imply unidirectional behavior - device is fully bidirectional. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and floating power domains without polarity concerns. |
| Low dynamic resistance (3.57 mΩ) | Minimizes clamping voltage rise under high-current surges, improving protection margin for 3.3 V/5 V logic rails. |
| High-temperature operation (Tj ≤ 175 °C) | Supports placement near heat-generating components (e.g., DC-DC converters) without derating or thermal shutdown. |
| JEDEC-compliant SMC footprint | Ensures drop-in compatibility with standard PCB layouts and automated assembly processes across OEM and EMS partners. |
| UL94 V0 flammability rating | Meets safety requirements for enclosed industrial equipment and automotive ECUs where flame propagation must be prevented. |
Applications
| Automotive Infotainment Power Rail | Industrial RS-485 Communication Port |
|---|---|
|
Use Scenario: Protecting 5 V supply lines feeding head unit display controllers against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing repetitive 5000 W surges while maintaining <0.2 µA leakage to preserve sleep-mode current budget. Use Value: Eliminates need for separate forward/reverse protection devices, reducing BOM count and PCB area by 50% versus dual-unidirectional solution. |
Use Scenario: Safeguarding RS-485 transceiver inputs/outputs in factory automation PLC modules exposed to cable-induced lightning surges. IC Role / Device Role / Timing Role: Symmetric clamping limits differential and common-mode transients to <10.3 V, preventing latch-up in MAX1487-level transceivers. Use Value: Withstands >486 A (10/1000 µs) surge current without degradation, extending field reliability beyond 10 years in harsh EMI environments. |
| Smart Meter AC Mains Interface | Medical Patient Monitoring Sensor Input |
|
Use Scenario: Shielding microcontroller ADC inputs connected to shunt-based current sensing on 230 VAC meter front-ends. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) avalanche clamping suppresses 4 kV IEC 61000-4-4 bursts before they reach precision analog circuitry. Use Value: Low 1000 pF capacitance at 0 V avoids signal attenuation or phase shift in 10 kHz current sampling waveforms. |
Use Scenario: Guarding isolated EEG/ECG electrode amplifiers against ESD events during clinical handling and cable coupling. IC Role / Device Role / Timing Role: ±30 kV IEC 61000-4-2 immunity ensures no reset or data corruption during routine sensor attachment/detachment. Use Value: Sub-µA leakage prevents DC offset drift in high-impedance biopotential front-ends, preserving diagnostic accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.0CA (STMicroelectronics) | Lower peak power (600 W vs. 5000 W); same VRM/VBR but higher VCL (10.5 V @ 58.1 A). | Suitable only for low-energy ESD-only scenarios; insufficient for IEC 61000-4-4 or load-dump protection. | Select when board space is constrained and surge energy is limited to <100 mJ. |
| SAC50-6.0CA (Littelfuse) | Same 5000 W rating and 6.0 V VRM, but higher leakage (1 µA) and lower Tj max (150 °C). | Acceptable for commercial-grade industrial controls but not under-hood automotive due to thermal limitation. | Choose if sourcing diversity is required and ambient temperature remains <125 °C. |
Compared with SMBJ6.0CA and SAC50-6.0CA, SMC50J6.0CA uniquely combines 175 °C operation, sub-µA leakage, and full IEC 61000-4-2/4-4 compliance - making it the only option qualified for extended-life automotive and high-reliability medical applications.
Availability
SMC50J6.0CA is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial RS-485 networks, and smart meter AC interface designs requiring stable component supply across multi-year production cycles.
Supply support for SMC50J6.0CA 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 automotive ICs with vertical manufacturing capabilities.
SMC50JxxA/CA belongs to ST's high-power TVS diode product line, engineered specifically for mission-critical surge immunity in automotive, industrial, and energy infrastructure applications where long-term reliability under thermal stress is non-negotiable.
FAQ
What is the maximum surge current SMC50J6.0CA can withstand?
SMC50J6.0CA sustains 486 A peak pulse current under the 10/1000 µs waveform (5000 W), and up to 14.7 A under the 8/20 µs waveform (48 kW). These values are measured per IEC 61000-4-5 and validated at Tj = 25 °C with proper PCB copper area per Figure 12 in DS13845.
How does bidirectional operation affect PCB layout?
SMC50J6.0CA requires no polarity-aware routing: both terminals are functionally identical. Layout follows the JEDEC SMC footprint (8.19 mm × 5.11 mm), with ≥1 cm² copper pour per pad to maintain thermal performance and achieve rated 5000 W dissipation per Figure 11.
Is SMC50J6.0CA compatible with lead-free reflow soldering?
Yes - it is qualified for lead-free reflow per J-STD-020 MSL Level 1, with peak temperature tolerance up to 245 °C for ≤30 seconds. The recommended profile (Figure 21) specifies ramp rates of ≤3 °C/s and a 60–90 second dwell above 217 °C.
Does clamping voltage change with temperature?
Yes - VCL increases with junction temperature at a coefficient of +10.7 × 10−4/°C (αT). At Tj = 125 °C, VCL rises to ~11.2 V (calculated using VCL(Tj) = VCL(25°C) × [1 + αT × (Tj − 25)]), confirmed in Table 2 footnote 2.
SMC50J6.0CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC50J
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 6V (Max)
- Voltage - Breakdown (Min):
- 6.7V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 486A
- 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
SMC50J6.0CA FAQ
1.How can I place an order for SMC50J6.0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J6.0CA 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 SMC50J6.0CA reliable?
The price and inventory of SMC50J6.0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J6.0CA is usually 5 days.
3.What payment methods are accepted for SMC50J6.0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J6.0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J6.0CA?
SMC50J6.0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J6.0CA 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 SMC50J6.0CA?
For technical support, including SMC50J6.0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J6.0CA requirements.
6.How does Aetrix verify that SMC50J6.0CA is sourced from the original manufacturer or authorized distributors?
All SMC50J6.0CA 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 SMC50J6.0CA meets industry standards.
7.What is the process for return or replacement of SMC50J6.0CA?
All SMC50J6.0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J6.0CA, 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 SMC50J6.0CA part is unused and in its original packaging.
Return procedure for SMC50J6.0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J6.0CA Tags
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