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STMicroelectronics SMC50J10CA
- Part No.:
- SMC50J10CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J10CA.pdf
- Description:
- Linear IC's
- Quantity:
- Payment:
- Shipping:
Inventory:7,378
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Product details
Overview
SMC50J10CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in power rails and data lines. It delivers 5000 W peak pulse power (10/1000 µs), clamps at 17 V (max) under 295 A surge current, and operates up to 175 °C junction temperature - enabling robust protection in industrial motor drives, PoE-powered equipment, and automotive body control modules.
For engineers reviewing the SMC50J10CA datasheet, SMC50J10CA pinout, SMC50J10CA application, or SMC50J10CA equivalent, key selection criteria include its 10 V standoff voltage, bidirectional polarity, low 0.2 µA leakage 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 fast-response clamping (<1 ns) against electrostatic discharge (IEC 61000-4-2 Level 4) and electrical fast transients (IEC 61000-4-4 Level 4, 4 kV). Its bidirectional configuration enables symmetrical protection on AC-coupled or floating signal paths without polarity dependency.
The device features a dynamic resistance of 6.25 mΩ at 25 °C, enabling tight clamping voltage control (VCL = 17 V max at IPP = 295 A), and exhibits predictable thermal derating - maintaining 5000 W capability up to 125 °C junction temperature per Figure 3 in DS13845.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 10 V - maximum continuous reverse working voltage before significant leakage or conduction begins. |
| Breakdown Voltage (VBR) | 11.1–12.3 V at 1 mA - ensures reliable triggering margin above system operating voltage. |
| Clamping Voltage (VCL) | 17 V max at 295 A (10/1000 µs) - limits downstream voltage stress during surge events. |
| Peak Pulse Power (PPP) | 5000 W (10/1000 µs) - sustains high-energy transients common in industrial power supply inputs. |
| Leakage Current (IR) | 0.2 µA at 25 °C - minimizes standby power loss in battery-backed or low-power sensor interfaces. |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in under-hood automotive or high-ambient industrial environments. |
| ESD Withstand (IEC 61000-4-2) | ±30 kV air/contact discharge - exceeds Level 4, eliminating need for external ESD staging in USB, RS-485, or CAN interfaces. |
Pinout & Package
SMC50J10CA 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. The bidirectional configuration means both terminals are electrically symmetric - no anode/cathode distinction in circuit function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode-bar side) | Surge current entry point (bidirectional) | Marked with cathode bar; functions identically to opposite terminal under reverse polarity surge. |
| Cathode (Cathode-bar side) | Surge current exit point (bidirectional) | Same physical terminal as Anode in bidirectional mode; clamping occurs symmetrically across both pins. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional ESD protection | Enables single-device protection on AC-coupled lines (e.g., Ethernet pairs, audio differential inputs) without polarity concerns. |
| Low dynamic resistance (6.25 mΩ) | Reduces clamping voltage rise under high-current surges, improving protection margin for 3.3 V/5 V logic interfaces. |
| High junction temperature rating (175 °C) | Permits placement near heat-generating components (e.g., MOSFETs, inductors) without derating penalties. |
| JEDEC SMC footprint compatibility | Ensures drop-in replacement capability and eliminates PCB redesign when upgrading from legacy 5.0–100 V TVS arrays. |
| UL94 V-0 flammability rating | Meets safety requirements for enclosed industrial enclosures and medical power supplies. |
Applications
| Industrial Motor Drives | Power over Ethernet (PoE) Switches |
|---|---|
|
Use Scenario: Protection of 24 V DC bus against load dump and inductive kickback in servo amplifier outputs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly across H-bridge power rails to absorb >5000 W energy pulses within nanoseconds. Use Value: Prevents MOSFET failure by limiting rail voltage to ≤17 V during 295 A transients, extending field reliability beyond 10 years. |
Use Scenario: Surge suppression on IEEE 802.3af/at data pairs carrying both power and 100BASE-TX signals. IC Role / Device Role / Timing Role: Symmetric clamping element on each twisted pair, leveraging bidirectional behavior to handle polarity-agnostic surges. Use Value: Maintains signal integrity below 10 pF capacitance while surviving ±30 kV ESD - critical for uninterrupted Gigabit Ethernet link-up. |
| Automotive Body Control Modules | Smart Building HVAC Controllers |
|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/Os from battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Primary front-end TVS on 12 V supply input and LIN signal lines, rated for 175 °C ambient operation. Use Value: Eliminates need for secondary TVS stages due to 0.2 µA leakage and stable VBR drift (αT = 10−4/°C), reducing BOM count by one component. |
Use Scenario: Guarding RS-485 communication ports in thermostats and zone controllers exposed to lightning-induced surges on long building wiring runs. IC Role / Device Role / Timing Role: Standalone surge protector mounted at connector entry point, clamping 4 kV EFT (IEC 61000-4-4) to safe levels. Use Value: Achieves >99.9% uptime in commercial HVAC networks by preventing transceiver latch-up during 8/20 µs surges up to 48 kW peak power. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ10CA (STMicroelectronics) | Lower PPP (600 W), same VRWM and bidirectional topology, SMB package (smaller footprint, lower thermal mass). | Suitable for space-constrained consumer electronics but insufficient for industrial 5000 W surge requirements. | Select only if system-level surge testing confirms <1000 W threat level and PCB area is critical. |
| SAC50-10CA (Littelfuse) | Identical 5000 W rating and 10 V VRWM, but higher VCL (18.2 V) and 7.5 mΩ RD; RoHS-compliant matte tin finish. | Marginally reduced protection headroom (1.2 V higher clamping) may impact 12 V logic rail safety margins. | Acceptable where existing SAC50-10CA inventory exists, but verify VCL margin against downstream IC absolute maximum ratings. |
Compared with SMBJ10CA and SAC50-10CA, SMC50J10CA offers optimal balance of clamping precision (17 V), thermal robustness (175 °C), and JEDEC-standardized SMC layout - making it preferred for new industrial and automotive designs requiring validated 5000 W surge immunity.
Availability
SMC50J10CA is available at Aetrix Electronics and suitable for industrial motor drives, Power over Ethernet infrastructure, and automotive body control modules requiring stable component supply across multi-year production cycles.
Supply support for SMC50J10CA 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 microcontrollers for industrial, automotive, and consumer markets.
The SMC50J TVS series was developed specifically for high-reliability surge protection in harsh-environment applications where extended temperature operation, low leakage, and JEDEC-standard packaging are mandatory design constraints.
FAQ
What is the maximum clamping voltage of SMC50J10CA under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 17 V at 295 A peak pulse current for a 10/1000 µs waveform, measured at Tj = 25 °C per Table 2 in DS13845. This value increases predictably with junction temperature using αT = 10−4/°C, reaching ~18.7 V at 175 °C.
Is SMC50J10CA unidirectional or bidirectional, and how is polarity identified?
SMC50J10CA is a bidirectional TVS diode. Polarity is marked with a cathode bar on one end of the SMC package, but both terminals behave identically under positive or negative surge conditions - unlike unidirectional types (e.g., SMC50J10A), which conduct only in reverse bias.
Can SMC50J10CA be used in place of SMC50J10A in a DC power rail application?
No - SMC50J10CA is bidirectional and will conduct during normal forward-biased DC operation, causing short-circuit failure. SMC50J10A must be used for unidirectional DC rails; the "CA" suffix explicitly denotes bidirectional symmetry and is incompatible with polarized circuits.
Does SMC50J10CA meet automotive AEC-Q200 qualification requirements?
SMC50J10CA is not AEC-Q200 qualified per ST's published documentation (DS13845 Rev 1, July 2023). While it operates up to 175 °C and passes JESD22-B102 E3 solderability, formal AEC-Q200 stress testing (including temperature cycling, humidity bias, and mechanical shock) has not been performed or certified for this part number.
SMC50J10CA 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):
- 10V (Max)
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 295A
- 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
SMC50J10CA FAQ
1.How can I place an order for SMC50J10CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J10CA 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 SMC50J10CA reliable?
The price and inventory of SMC50J10CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J10CA is usually 5 days.
3.What payment methods are accepted for SMC50J10CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J10CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J10CA?
SMC50J10CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J10CA 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 SMC50J10CA?
For technical support, including SMC50J10CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J10CA requirements.
6.How does Aetrix verify that SMC50J10CA is sourced from the original manufacturer or authorized distributors?
All SMC50J10CA 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 SMC50J10CA meets industry standards.
7.What is the process for return or replacement of SMC50J10CA?
All SMC50J10CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J10CA, 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 SMC50J10CA part is unused and in its original packaging.
Return procedure for SMC50J10CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J10CA Tags
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