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STMicroelectronics SMC30J13CA
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- Part No.:
- SMC30J13CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC30J13CA.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
SMC30J13CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in power and signal lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 21.5 V (max) under 140 A surge current, and operates up to 175 °C junction temperature - enabling robust protection in industrial power supplies, automotive body electronics, and telecom interfaces.
For engineers reviewing the SMC30J13CA datasheet, SMC30J13CA pinout, SMC30J13CA application, or SMC30J13CA equivalent, key selection criteria include its 13 V standoff voltage, bidirectional polarity, low 0.2 µA leakage at 25 °C, JEDEC-standard 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 electrostatic discharge and electrical overstress events. Its bidirectional configuration enables symmetric clamping across both polarities without external circuitry, supporting differential bus protection such as RS-485, CAN FD, and USB Type-C CC lines.
The device features a dynamic resistance of 11.5 mΩ and thermal coefficient αT = 10.4 × 10−4/°C, allowing accurate VCL and VBR derating over −55 °C to +175 °C operating range. Its low capacitance (≈100 pF at 1 V, bidirectional) minimizes signal integrity impact in high-speed data paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 13 V - maximum continuous reverse working voltage before significant leakage begins |
| Breakdown Voltage (VBR min) | 14.2 V at 1 mA - guaranteed avalanche conduction onset under DC bias |
| Clamping Voltage (VCL max) | 21.5 V at 140 A (10/1000 μs) - peak voltage seen by protected circuit during worst-case surge |
| Peak Pulse Power (PPP) | 3000 W (10/1000 μs) - energy-handling capacity for standard lightning/surge waveforms |
| Leakage Current (IRM) | 0.2 µA at VRM = 13 V, 25 °C - negligible standby power loss and minimal loading on sensitive analog/sensor inputs |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in under-hood automotive, industrial motor drives, and outdoor telecom enclosures |
| ESD Rating | ±30 kV per IEC 61000-4-2 (contact & air) - exceeds Level 4 immunity for human-body model stress |
Pinout & Package
SMC30J13CA is housed in a JEDEC-standard SMC (DO-214AB) surface-mount package with matte tin-plated leads, compatible with IPC-7531 footprint and reflow soldering per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | Anode-side terminal in unidirectional variant; symmetrical terminal in bidirectional | In bidirectional configuration (CA suffix), both terminals are functionally identical - no polarity sensitivity; enables placement without orientation check |
| Anode (A) | Cathode-side terminal in unidirectional variant; symmetrical terminal in bidirectional | Electrically interchangeable with Cathode pin; forms a center-tapped, dual-junction structure for symmetric clamping |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential buses (e.g., RS-485, CAN, Ethernet PHY) without polarity constraints |
| Low dynamic resistance (RD) | 11.5 mΩ - reduces clamping voltage rise under high di/dt surges, improving protection margin for downstream ICs |
| High junction temperature rating | 175 °C max - sustains reliability in thermally constrained environments like enclosed power converters and engine-control modules |
| JEDEC-registered SMC outline | Ensures mechanical compatibility with automated pick-and-place equipment and standard PCB footprints across manufacturing sites |
| UL94 V0 flammability rating | Confirms polymer housing meets stringent fire-safety requirements for industrial and transportation end equipment |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) Data Lines |
|---|---|
|
Use Scenario: Protecting 24 V DC input rails of programmable logic controllers (PLCs) against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Primary surge shunt element placed upstream of DC-DC converters and input filter capacitors. Use Value: Clamps transients to ≤21.5 V while sustaining 140 A peak current, preventing overvoltage damage to 36 V-rated input stages. |
Use Scenario: Safeguarding LIN and CAN FD communication lines in door modules and seat control units from ESD and battery transients. IC Role / Device Role / Timing Role: Bidirectional line protector on differential bus pairs, mounted adjacent to connector interface. Use Value: Delivers ±30 kV ESD immunity and sub-22 V clamping under 8/20 μs surges, preserving signal integrity and MCU I/O reliability. |
| Telecom DSL/ADSL Line Interface | Smart Energy Meter Communication Port |
|
Use Scenario: Shielding twisted-pair telephone line inputs in DSLAMs and residential gateways from lightning-induced surges. IC Role / Device Role / Timing Role: First-stage transient suppressor on line-side transformer secondary windings. Use Value: Handles up to 40 kW (8/20 μs) surge energy with <1 ns response, limiting induced voltages below PHY IC absolute maximum ratings. |
Use Scenario: Securing optical and RF communication ports (e.g., PLC, NB-IoT) in utility meters exposed to field ESD and grid switching noise. IC Role / Device Role / Timing Role: Low-leakage (0.2 µA) protector on microcontroller UART and SPI lines connected to external modems. Use Value: Prevents false resets and latch-up during ±30 kV contact discharge while adding negligible DC loading to battery-powered circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13CA (STMicroelectronics) | Same 13 V VRM and bidirectional architecture, but rated for 600 W (10/1000 μs) - 80% lower peak power than SMC30J13CA | Suitable for lower-energy interfaces (e.g., sensor I/O, low-speed UART); insufficient for 24 V power rail or telecom line protection | Select when space constraints favor SMB package (3.5 mm × 3.9 mm vs. SMC's 5.6 mm × 7.9 mm) and surge threat level is ≤600 W |
| 1.5KE13CA (ON Semiconductor) | Through-hole DO-201 package, 1500 W rating (10/1000 μs), higher VCL (24.4 V @ 61.5 A), and 1.0 µA leakage at VRM | Used in legacy industrial designs with through-hole assembly; less suitable for high-density SMT layouts or ultra-low-leakage requirements | Choose only for backward-compatible repairs or where manual assembly and higher leakage tolerance are acceptable |
Compared with SMBJ13CA and 1.5KE13CA, SMC30J13CA uniquely combines 3000 W surge capability, 0.2 µA leakage, and SMC SMT packaging - making it optimal for next-generation compact, high-reliability power and data interfaces demanding both energy handling and precision clamping.
Availability
SMC30J13CA is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive BCM data lines, telecom DSL line interfaces, and smart energy meter communication ports requiring stable component supply and long-term lifecycle support.
Supply support for SMC30J13CA 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, delivering innovative solutions across automotive, industrial, power, and digital markets since 1987.
The SMC30J TVS series was developed specifically for high-reliability surge protection in harsh-environment applications - emphasizing high-temperature operation, low leakage, and JEDEC-compliant manufacturability for automotive and industrial customers.
FAQ
What is the difference between SMC30J13A and SMC30J13CA?
SMC30J13A is unidirectional - it conducts only during negative transients relative to its cathode - while SMC30J13CA is bidirectional and provides symmetrical clamping for both positive and negative voltage excursions. The CA version is used on AC-coupled or differential signal lines (e.g., RS-485, CAN), whereas the A version suits DC power rails with defined polarity.
Can SMC30J13CA be used in parallel for higher surge current handling?
No - paralleling TVS diodes without active balancing causes current sharing imbalance due to VBR tolerances (±5% typical). ST does not recommend parallel operation. For >140 A surge current, select a higher-power variant (e.g., SMC30J15CA or SMC30J18CA) or implement staged protection with upstream GDT + downstream TVS.
Does SMC30J13CA meet AEC-Q200 for automotive use?
SMC30J13CA is not AEC-Q200 qualified. While it operates up to 175 °C and meets IEC 61000-4-2/4-4, ST offers the Automotive-grade SMAJ13CA (AEC-Q200 Grade 1) for qualified automotive applications. SMC30J13CA is intended for industrial and telecom - not safety-critical automotive subsystems.
What is the thermal resistance (Rth(j-a)) of SMC30J13CA on a standard FR4 PCB?
On a recommended footprint (copper area ≈ 3 cm² per lead), Rth(j-a) is approximately 100 °C/W for short pulses. With 4.5 cm² total copper area under both leads, thermal resistance drops to ~65 °C/W - critical for maintaining Tj ≤ 175 °C during repetitive surge events in enclosed enclosures.
SMC30J13CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC30J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 140A
- Power - Peak Pulse:
- 3000W (3kW)
- 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
SMC30J13CA FAQ
1.How can I place an order for SMC30J13CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC30J13CA 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 SMC30J13CA reliable?
The price and inventory of SMC30J13CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J13CA is usually 5 days.
3.What payment methods are accepted for SMC30J13CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J13CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC30J13CA?
SMC30J13CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC30J13CA 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 SMC30J13CA?
For technical support, including SMC30J13CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J13CA requirements.
6.How does Aetrix verify that SMC30J13CA is sourced from the original manufacturer or authorized distributors?
All SMC30J13CA 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 SMC30J13CA meets industry standards.
7.What is the process for return or replacement of SMC30J13CA?
All SMC30J13CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J13CA, 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 SMC30J13CA part is unused and in its original packaging.
Return procedure for SMC30J13CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC30J13CA Tags
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