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STMicroelectronics SMC30J58A
- Part No.:
- SMC30J58A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC30J58A.pdf
- Description:
- DISCRETE
- Quantity:
- Payment:
- Shipping:
Inventory:2,444
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Product details
Overview
SMC30J58A from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for high-energy surge protection in DC power rails and signal lines. It delivers 3000 W peak pulse power (10/1000 μs), clamps at 93.6 V (max) under 694 A surge current, and operates up to 175 °C junction temperature - enabling robust protection in industrial power supplies, telecom interfaces, and automotive ECUs where low leakage (0.2 µA @ 25 °C) and thermal stability are critical.
For engineers reviewing the SMC30J58A datasheet, SMC30J58A pinout, SMC30J58A application, or SMC30J58A equivalent, key selection criteria include standoff voltage (58 V), clamping performance at rated surge current, JEDEC-registered SMC package compatibility, and IEC 61000-4-2/4-4 compliance for ESD and EFT immunity validation in safety-critical systems.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide fast response (<1 ns) to transients while maintaining low dynamic resistance (153 mΩ) and minimal capacitance (≈12 pF at 0 V). Its unidirectional configuration supports DC-biased circuits with cathode-anode polarity alignment for forward conduction during overvoltage events.
The device meets MIL-STD-883 Method 3015 for ESD and IEC 61000-4-4 Level 4 (4 kV) for electrical fast transients. Thermal design is enabled by its 175 °C max junction rating and validated reflow profile per J-STD-020 MSL Level 1, supporting reliable operation in high-temperature PCB environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 58 V - Maximum continuous reverse operating voltage before breakdown; sets minimum system rail margin for safe DC bias. |
| Breakdown Voltage (VBR min) | 64.6 V at 1 mA - Ensures reliable triggering above normal operating voltage while avoiding false trips. |
| Clamping Voltage (VCL max) | 93.6 V at 694 A (10/1000 μs) - Defines worst-case voltage seen by protected ICs during surge; critical for downstream component survivability. |
| Peak Pulse Power (PPP) | 3000 W (10/1000 μs) - Specifies maximum transient energy absorption capability under standard lightning-surge waveform. |
| Leakage Current (IRM) | 0.2 µA at 58 V and 25 °C - Enables low-power standby operation without measurable drain on battery or sensor circuits. |
| Junction Temperature Range | –55 °C to +175 °C - Supports deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2 Level 4) - Exceeds standard requirements for human-body-model ESD immunity in user-accessible ports. |
Pinout & Package
SMC30J58A is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads. The package measures 7.75–8.15 mm × 5.55–6.25 mm × 2.45 mm max height and features a standardized IPC-7531 footprint for automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Current return path during clamping | Connected to system ground or low-side reference; completes surge current loop when cathode is biased above VRM. |
| Cathode (K) | Surge input terminal | Connected to protected line (e.g., 48 V rail or RS-485 bus); avalanche conduction begins here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping ratio (VCL/VBR ≈ 1.45) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices. |
| High surge current handling (694 A) | Supports protection of 48 V industrial buses against severe lightning-induced surges per IEC 61000-4-5. |
| Ultra-low leakage (0.2 µA) | Preserves battery life in always-on IoT sensors and avoids measurement errors in high-impedance analog front-ends. |
| 175 °C junction rating | Enables placement near heat-generating components (e.g., MOSFETs, inductors) without derating concerns. |
| JEDEC SMC outline compliance | Ensures mechanical and thermal compatibility with existing SMC footprints and reflow profiles across manufacturing lines. |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients within 1 ns, limiting voltage to ≤93.6 V during 694 A surge. Use Value: Prevents damage to upstream rectifier diodes and downstream DC-DC controllers by absorbing 3000 W surge energy without degradation. |
Use Scenario: LIN bus line in BCM subjected to ESD events during connector mating/unmating in vehicle assembly. IC Role / Device Role / Timing Role: TVS mounted at LIN transceiver input to shunt ±30 kV ESD strikes per IEC 61000-4-2, clamping voltage below transceiver's absolute maximum rating. Use Value: Maintains LIN communication integrity after repeated ESD exposure, eliminating field failures due to transceiver latch-up or gate oxide rupture. |
| Telecom Remote Radio Unit (RRU) | Smart Energy Meter Interface |
|
Use Scenario: DC power feed (–48 V) to outdoor RRU encountering induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: Primary surge protector on –48 V input rail, coordinated with upstream MOVs to handle multi-stroke surges per IEC 61000-4-5. Use Value: Survives 8/20 μs surges up to 40 kW peak power, ensuring uninterrupted RF transmission during thunderstorms. |
Use Scenario: RS-485 communication port of utility meter connected to external data concentrator via long outdoor cables. IC Role / Device Role / Timing Role: Bidirectional protection (using SMC30J58CA variant) on differential pair to suppress common-mode EFT bursts per IEC 61000-4-4 Level 4. Use Value: Eliminates data corruption and reset events caused by 4 kV fast transients, meeting ANSI C12.1 and IEC 62056 interoperability standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A (ON Semiconductor) | Same 58 V VRM and SMC-equivalent SMB package; lower PPP (600 W) and higher VCL (107 V @ 56 A). | Limited to lower-energy surges; unsuitable for 3000 W IEC 61000-4-5 compliance. | Select only for cost-sensitive, low-risk consumer electronics with <1 kA surge exposure. |
| 1.5KE56A (Littelfuse) | Through-hole DO-201 package; 56 V standoff; 1500 W PPP; VCL = 93.6 V @ 32.5 A. | Requires manual soldering or wave soldering; incompatible with high-density SMT layouts. | Use only when board space allows through-hole mounting and thermal mass supports legacy assembly processes. |
Compared with SMBJ58A and 1.5KE56A, SMC30J58A uniquely combines 3000 W surge capacity, SMT-compatible SMC packaging, and ultra-low leakage - making it the sole choice for high-reliability 48 V industrial and automotive power rail protection requiring both IEC 61000-4-2 Level 4 and IEC 61000-4-5 compliance.
Availability
SMC30J58A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom remote radio units, and smart energy meter interfaces requiring stable component supply across extended product lifecycles.
Supply support for SMC30J58A 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 microcontroller technologies for industrial, automotive, and consumer markets.
The SMC30J series belongs to ST's high-power TVS portfolio, engineered specifically for robust transient immunity in harsh-environment DC power systems - emphasizing low leakage, high-temperature operation, and JEDEC-standardized SMT reliability.
FAQ
What is the maximum clamping voltage of SMC30J58A at 694 A?
The maximum clamping voltage (VCL) of SMC30J58A is 93.6 V when subjected to a 10/1000 μs surge current of 694 A, as specified in Table 2 of DS8598 Rev 8. This value is measured at 25 °C ambient and represents the worst-case voltage imposed on protected circuitry during full-rated surge events.
Is SMC30J58A suitable for bidirectional signal line protection?
No - SMC30J58A is unidirectional and intended for DC-biased lines like power rails. For bidirectional protection (e.g., RS-485, USB, or CAN), the complementary part SMC30J58CA must be used, which provides symmetrical clamping for both polarities and is marked "3BCY" per Table 6.
Does SMC30J58A meet automotive AEC-Q200 requirements?
SMC30J58A is not AEC-Q200 qualified. While it operates up to 175 °C junction temperature and passes JESD22-B102 E3 solderability testing, ST does not list it in their AEC-Q200 stress-tested portfolio. For automotive-grade TVS diodes, consider ST's Automotive Qualified SMAJ or SMF series instead.
How does thermal resistance affect SMC30J58A's surge capability?
Thermal resistance (Rth(j-a)) directly limits repetitive surge capability: Figure 12 shows Rth(j-a) drops from ~120 °C/W (no copper) to ~40 °C/W with 3 cm² copper area per lead. At 175 °C max Tj, this enables ≥1000 surges at 1 Hz with proper PCB copper pour - critical for telecom base station surge cycling.
SMC30J58A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC30J
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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
SMC30J58A FAQ
1.How can I place an order for SMC30J58A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC30J58A 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 SMC30J58A reliable?
The price and inventory of SMC30J58A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J58A is usually 5 days.
3.What payment methods are accepted for SMC30J58A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J58A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC30J58A?
SMC30J58A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC30J58A 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 SMC30J58A?
For technical support, including SMC30J58A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J58A requirements.
6.How does Aetrix verify that SMC30J58A is sourced from the original manufacturer or authorized distributors?
All SMC30J58A 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 SMC30J58A meets industry standards.
7.What is the process for return or replacement of SMC30J58A?
All SMC30J58A units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J58A, 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 SMC30J58A part is unused and in its original packaging.
Return procedure for SMC30J58A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC30J58A Tags
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