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STMicroelectronics SMC50J36CA
- Part No.:
- SMC50J36CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J36CA.pdf
- Description:
- 5000 W, 36 V TVS IN SMC
- Quantity:
- Payment:
- Shipping:
Inventory:950
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Product details
Overview
SMC50J36CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in power rails and signal lines. It delivers 5000 W peak pulse power (10/1000 μs), clamps at 58.1 V (max) under 86 A surge current, and operates up to 175 °C junction temperature - enabling robust protection in industrial motor drives, telecom power supplies, and automotive body control modules.
For engineers reviewing the SMC50J36CA datasheet, SMC50J36CA pinout, SMC50J36CA application, or SMC50J36CA equivalent, key selection criteria include its 36 V standoff voltage, bidirectional polarity, low 0.2 µA leakage at 25 °C, JEDEC-registered SMC package, and IEC 61000-4-2 ±30 kV contact/air discharge compliance.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide fast response (<1 ns) to transients while maintaining stable clamping performance across temperature. Its bidirectional configuration enables symmetric protection of AC-coupled or floating signal paths without polarity constraints.
The device features a dynamic resistance of 10.0 mΩ (typical), enabling predictable voltage rise under high-current surges, and supports operation up to 175 °C - critical for under-hood automotive and high-density SMPS applications where thermal derating must be minimized.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 36 V - maximum continuous reverse operating voltage before significant leakage or clamping begins. |
| Breakdown Voltage (VBR) | 40–44.2 V at 1 mA - precise avalanche onset threshold ensuring reliable triggering before system damage. |
| Clamping Voltage (VCL) | 58.1 V max at 86 A (10/1000 μs) - limits downstream voltage stress during surge events. |
| Peak Pulse Power | 5000 W (10/1000 μs) - sustains high-energy transients common in industrial power line surges. |
| Leakage Current (IRM) | 0.2 µA at 25 °C - negligible standby power loss and minimal impact on high-impedance sensing circuits. |
| Junction Temperature Range | −55 °C to +175 °C - supports deployment in extreme environments including engine compartments and industrial enclosures. |
| ESD Rating | ±30 kV per IEC 61000-4-2 (contact & air) - exceeds Level 4 immunity requirements for end-equipment certification. |
Pinout & Package
SMC50J36CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads, optimized for automated assembly and high thermal dissipation on standard FR4 PCBs. The package measures 5.55–6.25 mm × 7.75–8.15 mm × 2.45 mm max height and supports IPC7531-compliant footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode-bar side) | Transient return path (bidirectional) | One terminal of symmetrical avalanche junction; no fixed polarity - connects to protected line or ground reference depending on layout. |
| Cathode (marked side) | Transient return path (bidirectional) | Identified by molded cathode bar; electrically identical to anode in bidirectional operation but used for orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge protection | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating power domains without external polarity management. |
| Low dynamic resistance (10.0 mΩ) | Minimizes clamping voltage overshoot under fast-rising surges, improving margin for downstream 3.3 V/5 V ICs. |
| High-temperature operation (175 °C TJ max) | Eliminates derating in thermally constrained spaces such as enclosed power converters or automotive junction boxes. |
| JEDEC-registered SMC outline | Ensures mechanical compatibility with standard pick-and-place equipment and reflow profiles per J-STD-020 MSL Level 1. |
| UL94 V-0 flammability rating | Meets safety standards for enclosure-integrated protection in Class I/II power systems and industrial controllers. |
Applications
| Industrial Motor Drives | Telecom DC Power Distribution |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensors against switching-induced transients in 48 V BLDC inverters. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus inputs and isolated signal lines to clamp inductive kickback and EFT bursts. Use Value: Prevents latch-up or permanent damage to isolated amplifiers and SiC gate drivers operating near 175 °C ambient. |
Use Scenario: Surge suppression on −48 V telecom rectifier outputs feeding remote radio units. IC Role / Device Role / Timing Role: Primary overvoltage clamp on distribution rail, coordinated with upstream MOVs and downstream POL converters. Use Value: Maintains <0.2 µA leakage to avoid battery drain during standby while surviving repeated 5000 W lightning-induced surges. |
| Automotive Body Control Modules | Industrial PLC Analog I/O |
|
Use Scenario: ESD protection for LIN bus transceivers and window lift motor H-bridge controls. IC Role / Device Role / Timing Role: Bidirectional TVS on bidirectional LIN lines and PWM-controlled motor outputs to absorb ISO 10605 pulses. Use Value: Withstands ±30 kV contact discharge without degradation, preserving signal integrity across 15-year vehicle service life. |
Use Scenario: Input protection for 4–20 mA current loop receivers exposed to field wiring transients. IC Role / Device Role / Timing Role: Clamping device placed ahead of precision op-amps and ADC front-ends to limit input voltage excursion. Use Value: 58.1 V clamping ensures analog front-end remains within absolute maximum ratings even during 8/20 μs surges up to 162 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36CA (Bourns) | Same 36 V VRM and bidirectional configuration, but rated for 600 W (10/1000 μs) - 88% lower peak power than SMC50J36CA. | Suitable for low-energy signal-line protection only; insufficient for DC bus or power rail surge suppression. | Select when space-constrained SMB footprint is required and surge energy is limited to ≤600 W. |
| 1.5KE36CA (Littelfuse) | Through-hole DO-201 package, 1500 W rating (10/1000 μs), higher clamping voltage (63.6 V) and 1.0 µA leakage. | Lacks SMC's surface-mount scalability and thermal performance; not suitable for high-density automated assembly. | Choose only for legacy through-hole designs where rework tolerance outweighs power density and thermal requirements. |
Compared with SMBJ36CA and 1.5KE36CA, SMC50J36CA provides 8.3× higher surge power handling, 10× lower leakage, and SMC package compatibility - making it the sole option capable of protecting 48 V industrial power rails against IEC 61000-4-4 Level 4 surges without parallel devices.
Availability
SMC50J36CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power distribution, automotive body control modules, and industrial PLC analog I/O requiring stable component supply across long-lifecycle programs.
Supply support for SMC50J36CA 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 portfolio, engineered specifically for industrial-grade surge immunity in harsh environments - emphasizing thermal robustness, low leakage, and JEDEC-compliant manufacturability.
FAQ
What is the maximum clamping voltage of SMC50J36CA under a 10/1000 μs surge?
The maximum clamping voltage (VCL) is 58.1 V at 86 A for a 10/1000 μs waveform, measured at 25 °C. This value increases with junction temperature at a coefficient of 10.0 × 10⁻⁴ /°C, reaching approximately 62.5 V at 125 °C junction temperature.
Is SMC50J36CA unidirectional or bidirectional?
SMC50J36CA is a bidirectional TVS diode, indicated by the "CA" suffix per ST's ordering nomenclature. It provides symmetrical clamping for both positive and negative transients, making it suitable for AC-coupled interfaces like RS-485 or LIN bus without polarity concerns.
Does SMC50J36CA meet automotive qualification standards?
While not AEC-Q200 qualified, SMC50J36CA meets ISO 10605 ESD requirements (±30 kV) and operates up to 175 °C junction temperature - enabling use in non-safety-critical automotive applications such as body electronics and infotainment power rails when validated per system-level test plans.
What is the recommended PCB footprint for SMC50J36CA?
The recommended footprint follows IPC7531 guidelines for SMC (DO-214AB): pad length 5.11 mm, pad width 3.14 mm, center-to-center spacing 8.19 mm, with 1.54 mm solder mask clearance. Thermal relief via copper area under each lead improves power dissipation and reduces thermal impedance.
SMC50J36CA 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 36V (Max)
- Voltage - Breakdown (Min):
- 40V
- Voltage - Clamping (Max) @ Ipp:
- 58.1V
- Current - Peak Pulse (10/1000µs):
- 86A
- 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
SMC50J36CA FAQ
1.How can I place an order for SMC50J36CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J36CA 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 SMC50J36CA reliable?
The price and inventory of SMC50J36CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J36CA is usually 5 days.
3.What payment methods are accepted for SMC50J36CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J36CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J36CA?
SMC50J36CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J36CA 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 SMC50J36CA?
For technical support, including SMC50J36CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J36CA requirements.
6.How does Aetrix verify that SMC50J36CA is sourced from the original manufacturer or authorized distributors?
All SMC50J36CA 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 SMC50J36CA meets industry standards.
7.What is the process for return or replacement of SMC50J36CA?
All SMC50J36CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J36CA, 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 SMC50J36CA part is unused and in its original packaging.
Return procedure for SMC50J36CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J36CA Tags
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