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STMicroelectronics SMC30J188CA
- Part No.:
- SMC30J188CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC30J188CA.pdf
- Description:
- 3000 W, 188 V TVS IN SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,617
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Product details
Overview
SMC30J188CA from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 328 V (max) under 9 A surge current, and operates up to 175 °C junction temperature-enabling robust protection in industrial motor drives and telecom power supplies.
For engineers reviewing the SMC30J188CA datasheet, SMC30J188CA pinout, SMC30J188CA application, or SMC30J188CA equivalent, key selection criteria include its 188 V standoff voltage, <0.2 µA leakage at 25 °C, JEDEC-registered SMC package, and IEC 61000-4-2 ±30 kV contact/air discharge compliance-critical for high-reliability front-end protection design.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide fast response (<1 ns) to transients while maintaining low dynamic resistance (1963 mΩ) and stable clamping across temperature (αT = 10.8 × 10−4/°C). Its bidirectional configuration enables symmetric protection on AC-coupled or floating lines without polarity constraints.
The device meets MIL-STD-883 Method 3015 for ESD immunity and IEC 61000-4-4 Level 4 (4 kV), with thermal performance validated up to 175 °C junction temperature and MSL Level 1 moisture sensitivity-supporting lead-free reflow and long-term reliability in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 188 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected circuit DC bias. |
| Clamping Voltage (VCL) | 328 V (max) at 9 A, 10/1000 μs - Peak voltage seen by downstream circuit during worst-case surge; defines protection margin. |
| Peak Pulse Power | 3000 W (10/1000 μs) - Sustained energy-handling capability for repetitive surges in industrial power inputs. |
| Leakage Current | 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 - Enables operation in under-hood automotive, industrial inverters, and outdoor telecom equipment. |
| ESD Rating | ±30 kV (IEC 61000-4-2, contact & air) - Full system-level ESD immunity without external shielding or filtering. |
| Dynamic Resistance | 1963 mΩ - Low impedance during clamping ensures minimal voltage overshoot and precise protection threshold control. |
Pinout & Package
SMC30J188CA is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads, compatible with IPC-7531 footprint and automated assembly. The bidirectional structure has no anode/cathode designation-both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Transient Input/Output Node | Connects to line under protection (e.g., DC bus or AC signal path); symmetrical bidirectional conduction. |
| Terminal 2 | Transient Input/Output Node | Second connection point to same protected line; forms low-inductance clamp loop with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| High-Temperature Operation | Rated for continuous use up to 175 °C junction temperature-eliminates derating in thermally constrained enclosures. |
| Low-Leakage Protection | 0.2 µA max reverse leakage at 25 °C-preserves battery life in always-on systems and avoids false triggers in precision analog paths. |
| JEDEC-Compliant SMC Package | Standardized mechanical outline (EIAJ ED-732AA) ensures board-level compatibility and automated placement reliability. |
| UL94 V-0 Flame Rating | Self-extinguishing polymer body meets safety requirements for enclosed industrial and medical power systems. |
| Whisker-Resistant Finish | Matt tin plating qualified per JESD201 Class 2-prevents tin whisker growth in high-reliability aerospace and rail applications. |
Applications
| Industrial Motor Drives | Telecom DC Power Distribution |
|---|---|
|
Use Scenario: Protection of 24–48 V DC bus against load dump, inductive kickback, and lightning-induced surges in variable-frequency drives. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly across input terminals to limit transient overvoltage before it reaches gate drivers and MCU power rails. Use Value: Prevents catastrophic failure of IGBT gate oxide and microcontroller brown-out during 3000 W surge events, extending field service life. |
Use Scenario: Front-end surge suppression on −48 V telecom rectifier outputs feeding base station RF modules and backhaul interfaces. IC Role / Device Role / Timing Role: Primary protection element absorbing IEC 61000-4-4 Level 4 (4 kV) bursts while maintaining <0.2 µA leakage to avoid disrupting sensitive bias networks. Use Value: Ensures uninterrupted operation during repeated surge exposure without degrading DC-DC converter efficiency or reference stability. |
| Automotive Body Control Modules | Industrial PLC I/O Channels |
|
Use Scenario: ESD protection on LIN bus and sensor supply lines exposed to human contact in cabin electronics. IC Role / Device Role / Timing Role: Bidirectional clamp bridging power and ground near connector entry points to shunt ±30 kV IEC 61000-4-2 discharges within <1 ns. Use Value: Eliminates need for secondary RC filters or ferrites-reducing BOM count and PCB area while meeting ISO 10605 requirements. |
Use Scenario: Transient suppression on 24 V digital input channels subject to relay coil flyback and field wiring coupling in factory automation. IC Role / Device Role / Timing Role: Standoff-rated (188 V) TVS placed upstream of optocoupler input to absorb >1 kV ring waves without forward conduction. Use Value: Maintains channel integrity during 10/1000 μs surges up to 3000 W, preventing false triggering and latch-up in isolated logic interfaces. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ188CA (ON Semiconductor) | Same 188 V VRM and bidirectional configuration, but lower 600 W peak power (10/1000 μs) and higher 371 V clamping at 5.2 A. | Limited to lower-energy surges; unsuitable for 3000 W industrial transients. | Select only for cost-sensitive, low-surge consumer applications where 3000 W rating is not required. |
| 1.5KE188CA (Littelfuse) | Through-hole DO-201 package, 188 V VRM, 1500 W peak power (10/1000 μs), 324 V clamping at 4.6 A. | Requires manual or wave soldering; lacks MSL Level 1 and JEDEC SMC footprint compatibility. | Use only when legacy through-hole assembly or higher thermal mass is mandated-otherwise prefer SMC30J188CA for SMT scalability. |
Compared with SMBJ188CA and 1.5KE188CA, SMC30J188CA uniquely combines 3000 W surge capacity, SMC surface-mount compatibility, and ±30 kV ESD rating-making it the sole choice for high-density, high-reliability industrial and telecom power rail protection.
Availability
SMC30J188CA is available at Aetrix Electronics and suitable for industrial motor drives, telecom DC power distribution, automotive body control modules, and industrial PLC I/O channels requiring stable component supply across multi-year production cycles.
Supply support for SMC30J188CA 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, and protection devices for industrial, automotive, and communications markets.
The SMC30J series was engineered specifically for high-energy transient suppression in next-generation power conversion systems-balancing ultra-low leakage, extended temperature range, and JEDEC-standard packaging for automated manufacturing.
FAQ
What is the maximum clamping voltage for SMC30J188CA under a 10/1000 μs surge?
The maximum clamping voltage (VCL) is 328 V at 9 A for a 10/1000 μs waveform, measured at Tj = 25 °C. This value increases with junction temperature per αT = 10.8 × 10−4/°C, reaching ~345 V at 125 °C-critical for margin analysis in thermally demanding layouts.
Is SMC30J188CA unidirectional or bidirectional, and how does that affect PCB layout?
SMC30J188CA is a bidirectional TVS diode, meaning both terminals are electrically symmetric and interchangeable. No polarity marking or orientation constraint exists-simplifying layout, enabling placement on AC-coupled lines or floating grounds without directional verification.
Does SMC30J188CA meet automotive-grade reliability standards?
While not AEC-Q200 qualified, SMC30J188CA exceeds key automotive stress requirements: it supports 175 °C operation, passes JESD22-B102 E3 solderability, JESD201 Class 2 whisker testing, and IEC 61000-4-2 ±30 kV ESD-making it suitable for under-hood body control and non-safety-critical power modules.
Can SMC30J188CA be used in parallel to increase surge current handling?
No-parallel connection is not recommended due to mismatched dynamic resistance (1963 mΩ) and VBR tolerance (±5%), which causes uneven current sharing and potential single-device failure. For higher current, select a higher-power series part like SMCJ188CA (5000 W) instead.
SMC30J188CA 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):
- 188V (Max)
- Voltage - Breakdown (Min):
- 209V
- Voltage - Clamping (Max) @ Ipp:
- 328V
- Current - Peak Pulse (10/1000µs):
- 9A
- 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
SMC30J188CA FAQ
1.How can I place an order for SMC30J188CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC30J188CA 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 SMC30J188CA reliable?
The price and inventory of SMC30J188CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J188CA is usually 5 days.
3.What payment methods are accepted for SMC30J188CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J188CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC30J188CA?
SMC30J188CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC30J188CA 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 SMC30J188CA?
For technical support, including SMC30J188CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J188CA requirements.
6.How does Aetrix verify that SMC30J188CA is sourced from the original manufacturer or authorized distributors?
All SMC30J188CA 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 SMC30J188CA meets industry standards.
7.What is the process for return or replacement of SMC30J188CA?
All SMC30J188CA units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J188CA, 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 SMC30J188CA part is unused and in its original packaging.
Return procedure for SMC30J188CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC30J188CA Tags
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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