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STMicroelectronics SMC30J170A
- Part No.:
- SMC30J170A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC30J170A.pdf
- Description:
- DISCRETE
- Quantity:
- Payment:
- Shipping:
Inventory:2,455
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Product details
Overview
SMC30J170A from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for high-energy surge protection in DC power lines and signal interfaces. It delivers 3000 W peak pulse power (10/1000 µs), clamps at 275 V (max) under 353 A surge current, and operates up to 175 °C junction temperature - enabling robust protection in industrial motor drives, telecom power supplies, and solar inverters.
For engineers reviewing the SMC30J170A datasheet, SMC30J170A pinout, SMC30J170A application, or SMC30J170A equivalent, key selection criteria include its 170 V standoff voltage, low 0.2 µA leakage at 25 °C, JEDEC-registered SMC package compatibility, and IEC 61000-4-2 ±30 kV ESD immunity - all critical for high-reliability overvoltage hardening.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to provide fast response (<1 ns) to transients while maintaining low dynamic resistance (1589 mΩ) and stable clamping performance across temperature. Its unidirectional configuration supports DC-biased circuits where reverse conduction must be blocked.
The device complies with IEC 61000-4-4 Level 4 (4 kV), exceeds IEC 61000-4-2 Level 4 for both air and contact discharge (±30 kV), and meets JESD22-B102 E3 solderability and IPC7531 footprint standards - ensuring compatibility with automated SMT assembly and long-term reliability in harsh thermal environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 170 V - maximum continuous reverse operating voltage before breakdown begins |
| Breakdown Voltage (VBR) | 190–210 V at 1 mA - precise avalanche initiation threshold for predictable clamping onset |
| Clamping Voltage (VCL) | 275 V max at 353 A (10/1000 µs) - limits downstream voltage stress during surge events |
| Peak Pulse Power (PPP) | 3000 W (10/1000 µs) - sustains high-energy surges without failure in industrial-grade applications |
| Leakage Current (IRM) | 0.2 µA at VRM and 25 °C - minimizes standby power loss and avoids false triggering in high-impedance circuits |
| Junction Temperature Range | −55 °C to +175 °C - enables operation in under-hood automotive, industrial PLC, and outdoor power electronics |
| ESD Withstand (IEC 61000-4-2) | ±30 kV contact & air discharge - exceeds Level 4 for direct human interaction and system-level ESD immunity |
Pinout & Package
SMC30J170A is housed in a JEDEC-registered SMC (DO-214AB) surface-mount package with matte tin-plated leads, optimized for thermal dissipation on standard FR4 PCBs using the IPC7531 footprint. The package measures 5.55–6.25 mm × 7.75–8.15 mm × 2.45 mm max height and supports reflow per J-STD-020 MSL Level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Marked Band) | Surge current sink terminal | Connected to protected line; conducts avalanche current to ground during overvoltage |
| Anode | Reference/return path | Typically tied to system ground or low-side reference; completes surge current loop |
Key Features
| Feature | Design Value |
|---|---|
| High surge capability | 3000 W (10/1000 µs) and up to 5.9 kW (8/20 µs) - handles lightning-induced surges in AC/DC front-ends |
| Low dynamic resistance | 1589 mΩ - ensures tight clamping voltage control and minimal voltage overshoot during fast transients |
| High-temperature operation | 175 °C max Tj - maintains protection integrity in thermally constrained enclosures like power converters |
| Low leakage current | 0.2 µA at VRM - prevents loading of high-impedance sensor inputs and battery-powered circuits |
| JEDEC-compliant SMC package | Standardized mechanical outline and footprint - ensures drop-in replacement and automated placement compatibility |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of DC bus lines against switching transients from IGBT gate drive noise and load dump events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed across input capacitor to clamp voltage spikes above 170 V. Use Value: Prevents MOSFET/IGBT overvoltage failure by limiting transient excursions to ≤275 V at 353 A, preserving system uptime. |
Use Scenario: Input-stage surge suppression in -48 V telecom rectifiers exposed to induced surges on distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side DC output, rated for continuous 170 V standoff. Use Value: Enables compliance with GR-1089-CORE Level 4 surge immunity without derating or parallel devices. |
| Solar Inverters | Automotive Body Control Modules |
|
Use Scenario: DC-link protection in string inverters subject to lightning-induced surges on PV array wiring. IC Role / Device Role / Timing Role: Fast-response unidirectional TVS on MPPT input stage, absorbing 3000 W pulses without degradation. Use Value: Extends capacitor and controller lifetime by reducing voltage stress during 10/1000 µs transients up to 275 V. |
Use Scenario: CAN bus power rail protection in BCMs operating in engine bay environments with wide ambient temperature swings. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply line, leveraging 175 °C Tj rating for under-hood reliability. Use Value: Maintains clamping performance across −40 °C to +125 °C ambient, eliminating thermal drift-related failures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ170A | Lower PPP (600 W), same VRM and VBR range, SMB package (smaller footprint, lower thermal mass) | Limited to lower-energy surges; unsuitable for 3000 W IEC 61000-4-4 compliance | Select only when space-constrained and surge energy is <1000 W |
| 1.5KE170A | Higher leakage (5 µA), axial-leaded DO-201 package, 1500 W PPP, slower response due to wirebond parasitics | Not suitable for automated SMT; requires manual assembly and lacks MSL-1 reflow compatibility | Use only in legacy through-hole designs where SMT is not feasible |
Compared with SMBJ170A and 1.5KE170A, SMC30J170A uniquely combines 3000 W surge handling, 0.2 µA leakage, and JEDEC SMC packaging - making it the only option qualified for high-reliability, high-energy, fully automated industrial power protection.
Availability
SMC30J170A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and solar inverters requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMC30J170A 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 consumer markets.
SMC30JxxA belongs to ST's high-power TVS diode product line, engineered specifically for robust overvoltage protection in high-energy DC systems where reliability under thermal and electrical stress is non-negotiable.
FAQ
What is the maximum clamping voltage of SMC30J170A at 353 A?
The maximum clamping voltage (VCL) is 275 V under a 10/1000 µs surge waveform at 353 A peak current, measured at 25 °C ambient. This value increases with junction temperature at a coefficient of 10.8 × 10⁻⁴/°C, reaching ~292 V at 125 °C junction temperature per the datasheet's αT correction formula.
Is SMC30J170A suitable for bidirectional signal line protection?
No - SMC30J170A is a unidirectional TVS diode, intended for DC-biased lines where reverse conduction must be blocked. For bidirectional protection, ST offers the pin-compatible SMC30J170CA variant, which provides symmetrical clamping for AC or floating signal paths.
Does SMC30J170A meet automotive AEC-Q200 requirements?
No - SMC30J170A is not AEC-Q200 qualified. It is rated for industrial and telecom applications with operating junction temperatures up to 175 °C but lacks the extended temperature cycling, vibration, and qualification testing required for automotive-grade components.
What is the recommended PCB footprint for SMC30J170A?
The recommended footprint follows IPC7531 and JEDEC MO-213AA standards: pad length 5.11 mm, pad width 1.54 mm, center-to-center pitch 8.19 mm, and copper area ≥3.14 cm² per lead to achieve optimal thermal resistance (Rth(j-a) ≈ 100 °C/W per datasheet Figure 12).
SMC30J170A 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):
- 170V (Max)
- Voltage - Breakdown (Min):
- 190V
- Voltage - Clamping (Max) @ Ipp:
- 275V
- Current - Peak Pulse (10/1000µs):
- 11A
- 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
SMC30J170A FAQ
1.How can I place an order for SMC30J170A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC30J170A 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 SMC30J170A reliable?
The price and inventory of SMC30J170A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC30J170A is usually 5 days.
3.What payment methods are accepted for SMC30J170A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC30J170A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC30J170A?
SMC30J170A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC30J170A 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 SMC30J170A?
For technical support, including SMC30J170A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC30J170A requirements.
6.How does Aetrix verify that SMC30J170A is sourced from the original manufacturer or authorized distributors?
All SMC30J170A 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 SMC30J170A meets industry standards.
7.What is the process for return or replacement of SMC30J170A?
All SMC30J170A units undergo pre-shipment inspection (PSI). If there is an issue with SMC30J170A, 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 SMC30J170A part is unused and in its original packaging.
Return procedure for SMC30J170A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC30J170A Tags
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