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STMicroelectronics SMC30J58CA
- Part No.:
- SMC30J58CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC30J58CA.pdf
- Description:
- DISCRETE
- Quantity:
- Payment:
- Shipping:
Inventory:2,498
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Product details
Overview
SMC30J58CA 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 93.6 V (max) under 694 A surge, 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 SMC30J58CA datasheet, SMC30J58CA pinout, SMC30J58CA application, or SMC30J58CA equivalent, key selection criteria include its 58 V standoff voltage, bidirectional polarity, low 0.2 µA leakage at 25 °C, JEDEC-standard SMC package, and compliance with IEC 61000-4-2 (±30 kV contact/air) and IEC 61000-4-4 level 4 (4 kV).
Technical Context
This TVS diode uses planar silicon avalanche technology to achieve precise breakdown voltage tolerance (±5% for VBR), low dynamic resistance (153 Ω typical at 25 °C), and stable clamping performance across temperature (αT = 10.4 × 10−4/°C). Its bidirectional structure enables symmetrical protection on AC lines or differential data buses without polarity constraints.
The device sustains 175 °C maximum junction temperature and exhibits <1 nF junction capacitance at 0 V (bidirectional type), making it suitable for high-speed interfaces where capacitive loading must be minimized - unlike unidirectional variants optimized for DC rail protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 58 V - Maximum continuous reverse working voltage before conduction begins; defines operating margin below clamping threshold. |
| Breakdown Voltage (VBR) | 64.6–71.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering during transients above system operating voltage. |
| Clamping Voltage (VCL) | 93.6 V max at 694 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress. |
| Peak Pulse Power (PPP) | 3000 W (10/1000 µs) - Sustained energy-handling capability per single transient; validates suitability for IEC 61000-4-4 level 4 surges. |
| Leakage Current (IR) | 0.2 µA max at 58 V and 25 °C - Minimal standby power loss and signal integrity impact in always-on circuits. |
| Junction Temperature Range | −55 °C to +175 °C - Enables deployment in under-hood automotive, industrial inverters, and outdoor telecom equipment without derating. |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2) - Exceeds level 4 immunity requirements; eliminates need for external ESD staging in front-end interfaces. |
Pinout & Package
SMC30J58CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads, footprint-compliant with IPC7531. The bidirectional configuration requires no anode/cathode orientation - both terminals are functionally identical for symmetric surge clamping.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current entry (negative half-cycle) | Conducts during negative transients; forms one half of symmetrical clamping path in bidirectional operation. |
| Cathode (K) | Surge current entry (positive half-cycle) | Conducts during positive transients; pairs with Anode to provide full-wave clamping without polarity dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, RS-485 buses, and Ethernet PHYs without external polarity management. |
| Low dynamic resistance (RD) | 153 Ω typical - Reduces clamping voltage rise under high-current surges, improving protection margin for sensitive ICs. |
| High-temperature reliability | Rated to 175 °C Tj - Maintains specified VBR and leakage over extended thermal cycles in power-conversion environments. |
| JEDEC-standard SMC package | Compatible with automated SMT assembly and IPC7531 footprints - ensures manufacturability and thermal performance on FR4 PCBs. |
| UL94 V0 flammability rating | Validates polymer housing safety in enclosed industrial enclosures and consumer power adapters subject to fire-safety regulations. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of DC bus inputs against load dump and inductive switching transients in 48 V BLDC drive controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ±100 V surges within 1 ns response time. Use Value: Prevents MOSFET gate oxide failure and controller latch-up by limiting transient voltage to 93.6 V while sustaining 694 A peak current. |
Use Scenario: Input-stage surge suppression in 48 V telecom rectifiers exposed to lightning-induced surges on primary AC lines. IC Role / Device Role / Timing Role: Primary-level TVS mounted before bridge rectifier to absorb 4 kV IEC 61000-4-4 level 4 surges. Use Value: Eliminates need for multi-stage protection by handling full 3000 W pulse energy in single device, reducing BOM count and board space. |
| Automotive Body Control Modules | RS-485 Industrial Networks |
|
Use Scenario: CAN/LIN bus line protection in BCMs subjected to ESD events during connector mating/unmating in vehicle assembly. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair to suppress ±30 kV contact discharge per IEC 61000-4-2. Use Value: Maintains signal integrity with <1 nF junction capacitance at 0 V, avoiding data corruption at 500 kbps CAN FD rates. |
Use Scenario: Transient suppression on RS-485 transceiver bus lines in factory automation PLCs connected to long cable runs. IC Role / Device Role / Timing Role: Line-to-line TVS installed at transceiver output to clamp common-mode surges induced by nearby motor switching. Use Value: Clamps 10/1000 µs surges to ≤93.6 V while maintaining <0.2 µA leakage, preventing false triggering of fail-safe receivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58CA (Bourns) | Same 58 V VRWM, but lower PPP = 600 W (10/1000 µs); higher VCL = 93.6 V at only 38.9 A. | Insufficient for 3000 W surge environments like telecom rectifiers or motor drives. | Select only for cost-sensitive, low-energy signal-line protection where 600 W rating suffices. |
| 1.5KE58CA (Littelfuse) | Higher VCL = 98.5 V at 30.7 A; axial-leaded DO-201 package limits SMT scalability and thermal performance. | Not suitable for high-density PCBs or automated assembly; lacks MSL-1 reflow compatibility. | Use only in legacy through-hole designs where SMC footprint is unavailable and surge energy is ≤1500 W. |
Compared with SMBJ58CA and 1.5KE58CA, SMC30J58CA uniquely combines 3000 W surge rating, SMC surface-mount compatibility, and bidirectional symmetry - making it the sole option for high-reliability, high-density, high-energy industrial and automotive applications requiring single-device robustness.
Availability
SMC30J58CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, automotive body control modules, and RS-485 industrial networks requiring stable component supply, long-term lifecycle support, and consistent surge performance across production batches.
Supply support for SMC30J58CA 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 SMC30J series belongs to ST's high-power TVS diode product line, engineered specifically for robust electrostatic and surge protection in harsh-environment power conversion and communication systems.
FAQ
What is the maximum clamping voltage of SMC30J58CA under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 93.6 V when subjected to a 694 A peak current pulse with 10/1000 µs waveform, as verified in Table 2 of DS8598 Rev 8. This value is measured at Tamb = 25 °C and represents the worst-case voltage imposed on protected circuitry during standardized surge testing.
Is SMC30J58CA compatible with lead-free reflow soldering processes?
Yes - SMC30J58CA supports lead-free reflow per JEDEC J-STD-020 MSL level 1, with a peak profile of 240–245 °C for 20–40 seconds. Its matte tin plating and SMC package are qualified for standard Pb-free thermal cycles, including ST's recommended ramp rate of 2–3 °C/s up to peak temperature.
How does the bidirectional configuration affect PCB layout compared to unidirectional TVS diodes?
SMC30J58CA's bidirectional design eliminates polarity marking and orientation constraints - both terminals are electrically symmetric. This simplifies layout by removing anode/cathode placement checks, reduces assembly errors, and allows direct replacement of unidirectional devices in AC-coupled or differential applications without redesigning trace routing.
Does SMC30J58CA meet automotive AEC-Q200 qualification requirements?
No - SMC30J58CA is not AEC-Q200 qualified. While it operates up to 175 °C junction temperature and meets IEC/EN standards for surge and ESD, ST does not list this part in its AEC-Q200-qualified TVS portfolio. For automotive-grade applications requiring AEC-Q200, consult ST's Automotive TVS family such as the SMAJ or SMCJ series with explicit qualification documentation.
SMC30J58CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC30J
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 58V (Max)
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 93.6V
- Current - Peak Pulse (10/1000µs):
- 32A
- 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
SMC30J58CA FAQ
1.How can I place an order for SMC30J58CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC30J58CA 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 SMC30J58CA reliable?
The price and inventory of SMC30J58CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J58CA is usually 5 days.
3.What payment methods are accepted for SMC30J58CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J58CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC30J58CA?
SMC30J58CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC30J58CA 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 SMC30J58CA?
For technical support, including SMC30J58CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J58CA requirements.
6.How does Aetrix verify that SMC30J58CA is sourced from the original manufacturer or authorized distributors?
All SMC30J58CA 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 SMC30J58CA meets industry standards.
7.What is the process for return or replacement of SMC30J58CA?
All SMC30J58CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J58CA, 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 SMC30J58CA part is unused and in its original packaging.
Return procedure for SMC30J58CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC30J58CA Tags
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