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STMicroelectronics SMC50J13CA
- Part No.:
- SMC50J13CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J13CA.pdf
- Description:
- Linear IC's
- Quantity:
- Payment:
- Shipping:
Inventory:4,177
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Product details
Overview
SMC50J13CA from STMicroelectronics is a bidirectional 13 V standoff voltage transient voltage suppression (TVS) diode in SMC package, rated for 5000 W peak pulse power (10/1000 µs), 23.6 V clamping voltage at 27.2 A surge current, and 0.2 µA leakage at 25 °C - designed for IEC 61000-4-2 ESD and IEC 61000-4-4 EFT protection in industrial power supplies and telecom interfaces.
For engineers reviewing the SMC50J13CA datasheet, SMC50J13CA pinout, SMC50J13CA application, or SMC50J13CA equivalent, this device serves as a high-reliability, high-temperature (Tj up to 175 °C) TVS solution with JEDEC-registered SMC footprint, low dynamic resistance (9.13 mΩ), and verified 30 kV contact/air discharge immunity - critical for robust front-end surge protection in harsh environments.
Technical Context
The SMC50J13CA employs planar junction technology to achieve low leakage (0.2 µA at VRM = 13 V) and stable clamping performance across temperature (αT = 10⁻⁴ /°C). Its bidirectional configuration enables symmetric surge suppression on AC-coupled or differential signal lines without polarity constraints.
It delivers 23.6 V clamping at 27.2 A (10/1000 µs) and 27.2 V at 27.2 A (8/20 µs), with dynamic resistance of 9.13 mΩ - enabling precise overvoltage limiting during fast transients while minimizing power dissipation in the protected circuit.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 13 V - maximum continuous reverse operating voltage before breakdown; defines minimum system operating margin. |
| Breakdown Voltage (VBR) | 14.4–16.0 V at 1 mA - ensures reliable triggering above normal operating voltage while avoiding false trips. |
| Clamping Voltage (VCL) | 23.6 V at 27.2 A (10/1000 µs) - limits transient voltage seen by downstream ICs to safe levels during surge events. |
| Peak Pulse Power (PPP) | 5000 W (10/1000 µs) - sustains high-energy surges typical of industrial load switching and lightning-induced coupling. |
| Leakage Current (IRM) | 0.2 µA at 25 °C - negligible standby power loss and minimal impact on high-impedance sensor or reference circuits. |
| Junction Temperature Range | −55 to +175 °C - supports operation in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - exceeds Level 4 immunity for human-body-model ESD events. |
| Dynamic Resistance (RD) | 9.13 mΩ - determines clamping voltage rise per unit surge current (ΔV = RD × ΔI), critical for precision protection. |
Pinout & Package
SMC50J13CA uses the JEDEC-registered SMC (DO-214AB) surface-mount package: 7.75–8.15 mm length, 5.55–6.25 mm width, 2.90–3.20 mm terminal width, matte tin-plated leads, MSL Level 1, compatible with standard reflow profiles (peak 240–245 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode-bar side) | Transient return path (bidirectional) | Terminal connected to ground or common reference; cathode bar marking identifies polarity orientation for layout verification. |
| Cathode (Opposite side) | Transient return path (bidirectional) | Electrically identical to anode in bidirectional configuration; both terminals conduct equally during positive/negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC lines, differential buses (e.g., RS-485), and floating inputs without external polarity management. |
| 175 °C max junction temperature | Supports placement near heat-generating components (e.g., MOSFETs, inductors) in compact power converters without derating. |
| Low dynamic resistance (9.13 mΩ) | Minimizes clamping voltage overshoot during high-di/dt events, improving protection margin for 3.3 V/5 V logic interfaces. |
| JEDEC SMC footprint compliance | Ensures mechanical compatibility with automated assembly, IPC-7351B land patterns, and thermal pad design rules for FR4 PCBs. |
| 30 kV ESD immunity (contact/air) | Eliminates need for secondary ESD stages in end-equipment, reducing BOM count and board space in industrial HMI and control panels. |
Applications
| Industrial Power Supply Input | RS-485 Communication Port |
|---|---|
|
Use Scenario: Protection of 24 V DC input stage against load dump, inductive kickback, and lightning-induced surges in PLC power modules. IC Role / Device Role / Timing Role: Primary front-end TVS clamp absorbing >5 kV transients before they reach upstream rectifiers and bulk capacitors. Use Value: Prevents catastrophic failure of input bridge rectifiers and electrolytic capacitors by limiting transient voltage to ≤23.6 V at 27.2 A. |
Use Scenario: Surge protection on half-duplex RS-485 bus lines exposed to field wiring in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between A/B differential pair and ground, handling ±30 kV ESD and 4 kV EFT pulses. Use Value: Maintains signal integrity by clamping transients within 1 ns response time while adding <10 pF capacitance at 1 MHz. |
| Telecom DSL Line Interface | Automotive Body Control Module (BCM) |
|
Use Scenario: Transient suppression on POTS/DSL line interface cards subjected to induced surges from nearby AC mains or lightning. IC Role / Device Role / Timing Role: Secondary protection device after gas discharge tube (GDT), providing low-clamp backup for fast-rising transients. Use Value: Limits residual voltage to 23.6 V during 10/1000 µs surges, protecting ADSL transceivers rated for ≤26 V absolute maximum. |
Use Scenario: Protection of LIN bus or switched 12 V supply lines in BCMs exposed to ISO 7637-2 pulse 1/2a/3a transients. IC Role / Device Role / Timing Role: Standoff-rated TVS on low-voltage control lines where 13 V VRM matches nominal 12 V battery systems with tolerance. Use Value: Survives repeated 175 °C junction temperature excursions during engine-off hot soak, ensuring long-term reliability in under-dash locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13CA (STMicroelectronics) | Lower PPP rating: 600 W (vs. 5000 W); same VRM, VBR, and bidirectional configuration. | Targeted at lower-energy ESD-only scenarios; insufficient for IEC 61000-4-4 level 4 (4 kV) or load-dump events. | Select only when surge energy is limited to <100 mJ and board space constraints prohibit SMC footprint. |
| SAC13CA (Littelfuse) | Same VRM (13 V), but higher VCL: 25.5 V at 25 A; slightly higher leakage (1 µA); different thermal resistance profile. | Valid for similar industrial port protection, but requires validation of downstream IC's 25.5 V tolerance margin. | Prefer when sourcing diversification is required and clamping voltage margin allows 1.9 V higher VCL. |
Compared with SMBJ13CA and SAC13CA, SMC50J13CA provides 8.3× higher peak pulse power and tighter clamping (23.6 V vs. ≥25.5 V), making it uniquely suitable for high-energy industrial and automotive surge environments where both energy handling and voltage precision are critical.
Availability
SMC50J13CA is available at Aetrix Electronics and suitable for industrial power supply input protection, RS-485 communication port hardening, telecom DSL line interface surge suppression, and automotive body control module (BCM) voltage rail protection requiring stable component supply and full traceability.
Supply support for SMC50J13CA 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 targets high-reliability surge protection in demanding environments - engineered for extended junction temperature operation, JEDEC-compliant manufacturability, and compliance with IEC 61000-4-2/4-4 standards.
FAQ
What is the maximum clamping voltage of SMC50J13CA under IEC 61000-4-4 4 kV testing?
The SMC50J13CA clamps to 23.6 V at 27.2 A for 10/1000 µs surges - the standardized waveform used in IEC 61000-4-4 Level 4 testing. This value is measured at Tj = 25 °C and remains stable up to 175 °C due to its 10⁻⁴/°C temperature coefficient (αT).
Can SMC50J13CA replace unidirectional SMC50J13A in a bidirectional application?
No - SMC50J13A is unidirectional and conducts only in reverse bias; using it in place of the bidirectional SMC50J13CA on AC or differential lines would result in forward conduction and potential failure. The cathode bar marking and internal structure differ fundamentally between A (unidirectional) and CA (bidirectional) variants.
What is the thermal resistance (Rth(j-a)) of SMC50J13CA on a standard FR4 PCB?
On a 70 µm copper FR4 board with recommended footprint (3.14 cm² copper area per lead), Rth(j-a) is 120 °C/W for single-pulse conditions. With 4.5 cm² total copper area, it drops to ~80 °C/W - enabling sustained operation at 175 °C junction temperature under intermittent surge duty cycles.
Does SMC50J13CA meet automotive AEC-Q200 requirements?
No - SMC50J13CA is not AEC-Q200 qualified. It meets industrial-grade reliability standards (JEDEC MSL Level 1, JESD22-B102 E3, whisker-tested per JESD201 Class 2), but lacks the extended temperature cycling, vibration, and lifetime testing required for automotive qualification.
SMC50J13CA 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):
- 13V (Max)
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 233A
- 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
SMC50J13CA FAQ
1.How can I place an order for SMC50J13CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J13CA 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 SMC50J13CA reliable?
The price and inventory of SMC50J13CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J13CA is usually 5 days.
3.What payment methods are accepted for SMC50J13CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J13CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J13CA?
SMC50J13CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J13CA 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 SMC50J13CA?
For technical support, including SMC50J13CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J13CA requirements.
6.How does Aetrix verify that SMC50J13CA is sourced from the original manufacturer or authorized distributors?
All SMC50J13CA 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 SMC50J13CA meets industry standards.
7.What is the process for return or replacement of SMC50J13CA?
All SMC50J13CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J13CA, 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 SMC50J13CA part is unused and in its original packaging.
Return procedure for SMC50J13CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J13CA Tags
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