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STMicroelectronics SMC50J58A
- Part No.:
- SMC50J58A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J58A.pdf
- Description:
- 5000 W, 58 V TVS IN SMC
- Quantity:
- Payment:
- Shipping:
Inventory:8,611
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Product details
Overview
SMC50J58A from STMicroelectronics is a unidirectional 58 V standoff voltage transient voltage suppressor (TVS) diode in SMC package, rated for 5000 W peak pulse power (10/1000 µs), 419 A peak pulse current, and 93.6 V clamping voltage at 25 °C - designed to protect DC power rails and signal lines in industrial power supplies, motor drives, and telecom interfaces against IEC 61000-4-2 ESD (±30 kV contact/air) and IEC 61000-4-4 surge events.
For engineers reviewing the SMC50J58A datasheet, SMC50J58A pinout, SMC50J58A application, or SMC50J58A equivalent, this device delivers low leakage (0.2 µA at 25 °C), high junction temperature operation (up to +175 °C), JEDEC-registered SMC package compatibility, and validated 8/20 µs surge capability up to 121 A - critical for robust overvoltage protection in high-reliability embedded systems.
Technical Context
This unidirectional TVS uses planar silicon junction technology to achieve stable breakdown behavior with minimal thermal drift (αT = 10.4 × 10−4/°C), enabling predictable clamping across −55 °C to +175 °C operating range. Its dynamic resistance of 130 mΩ at 8/20 µs supports fast energy dissipation without excessive voltage overshoot.
The device complies with IEC 61000-4-2 Level 4 (±30 kV), IEC 61000-4-4 Level 4 (4 kV), UL94 V0 flammability, and JESD22-B102 E3 solderability - confirming suitability for automated assembly and safety-critical end equipment requiring certified surge immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 58 V - maximum continuous reverse working voltage before conduction begins; sets protection threshold for 48 V DC systems. |
| Breakdown Voltage (VBR) | 64.6–71.4 V at 1 mA - tight tolerance ensures consistent triggering across temperature and production lots. |
| Clamping Voltage (VCL) | 93.6 V at 419 A (10/1000 µs) - defines worst-case voltage seen by protected circuit during surge event. |
| Peak Pulse Power (PPP) | 5000 W (10/1000 µs) - enables protection against high-energy transients common in industrial power input stages. |
| Leakage Current (IR) | 0.2 µA at 25 °C - negligible loading on sensitive analog or low-power control circuits. |
| Junction Temperature Range | −55 °C to +175 °C - supports operation in under-hood automotive, industrial motor controls, and outdoor telecom enclosures. |
| Package | SMC (DO-214AB) - JEDEC-registered surface-mount outline with 7.75–8.15 mm body width and 5.55–6.25 mm length; compatible with IPC-7531 footprint. |
Pinout & Package
SMC50J58A is housed in a 2-terminal SMC (DO-214AB) package with cathode-bar marking indicating polarity. The device has no internal circuitry beyond the PN junction; terminals are anode and cathode only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked side opposite cathode bar) | Reference node for unidirectional clamping | Connected to ground or lower-potential rail; defines directionality of protection path. |
| Cathode (bar-marked end) | Surge current sink terminal | Connected to protected line; conducts transient current to ground when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | ±30 kV contact and air discharge - exceeds Level 4, eliminating need for external ESD staging in front-end interfaces. |
| High-temperature reliability | Rated for Tj up to +175 °C - maintains clamping performance in thermally stressed environments like motor drive PCBs. |
| Low dynamic resistance | 130 mΩ at 8/20 µs - minimizes clamping voltage rise under fast-rising surges (e.g., lightning-induced transients). |
| JEDEC-compliant SMC package | Matte tin-plated leads, MSL Level 1 - supports lead-free reflow without moisture sensitivity concerns or post-bake requirements. |
| Stable voltage coefficient | αT = 10.4 × 10−4/°C - enables accurate VCL prediction across operating temperature range for system-level margining. |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp positive-going surges above 58 V. Use Value: Limits transient voltage to ≤93.6 V during 419 A 10/1000 µs events, preventing damage to upstream rectifier and downstream DC-DC controllers. |
Use Scenario: RS-485 data line in outdoor base station equipment subject to induced lightning surges and ESD from field technician handling. IC Role / Device Role / Timing Role: Bidirectional protection (using SMC50J58CA variant) across differential pair, referenced to local ground plane. Use Value: Clamps ±4 kV IEC 61000-4-4 surges within 1 ns response time while maintaining <1 pF junction capacitance at 0 V bias - preserving signal integrity up to 20 Mbps. |
| Motor Drive Gate Driver Protection | Automotive Body Control Module (BCM) |
|
Use Scenario: Low-side MOSFET gate driver supply rail in HVAC blower motor inverter, susceptible to cross-conduction spikes and Miller-induced transients. IC Role / Device Role / Timing Role: Unidirectional TVS connected from gate driver VDD to GND to suppress negative-going undershoot and positive overshoot. Use Value: Withstands repeated 5000 W pulses without parameter shift, ensuring long-term reliability in high-cycle industrial motion control. |
Use Scenario: 12 V battery-supplied lighting control circuit in passenger vehicle BCM, exposed to ISO 7637-2 pulse 1/2a/3a and ESD per ISO 10605. IC Role / Device Role / Timing Role: Unidirectional TVS on switched 12 V feed to LED driver IC, referenced to chassis ground. Use Value: Survives 175 °C junction temperature during engine bay operation while delivering 30 kV ESD immunity - meeting OEM AEC-Q101 stress test requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ58A (ON Semiconductor) | Same 58 V VRWM, but lower PPP = 600 W (10/1000 µs); SMB package (smaller footprint, higher thermal resistance). | Limited to lower-energy surges; unsuitable for IEC 61000-4-4 Level 4 or high-current industrial transients. | Select only if space-constrained and surge threat level is limited to ESD-only (IEC 61000-4-2). |
| 1.5KE56A (Littelfuse) | Through-hole DO-201 package; 56 V VRWM, 1500 W PPP; higher leakage (5 µA) and lower Tjmax (150 °C). | Requires wave soldering; incompatible with high-density SMT layouts and high-temperature ambient designs. | Choose only for legacy through-hole designs where rework flexibility outweighs thermal and surge performance trade-offs. |
Compared with SMBJ58A and 1.5KE56A, SMC50J58A provides 8.3× higher peak power rating than SMBJ58A and 3.3× higher than 1.5KE56A, operates reliably at +175 °C, and fits modern SMT assembly lines - making it the preferred choice for next-generation industrial and automotive power protection.
Availability
SMC50J58A is available at Aetrix Electronics and suitable for industrial motor drives, telecom infrastructure power modules, and automotive body control units requiring stable component supply, full traceability, and long-lifecycle support.
Supply support for SMC50J58A 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 SMC50J TVS series is part of ST's high-power transient protection portfolio, engineered specifically for robust overvoltage suppression in harsh electromagnetic environments - including factory automation, renewable energy inverters, and 5G infrastructure.
FAQ
What is the maximum clamping voltage of SMC50J58A under a 10/1000 µs surge?
The maximum clamping voltage (VCL) of SMC50J58A is 93.6 V at 419 A for a 10/1000 µs waveform, measured at Tj = 25 °C. This value increases with junction temperature at a rate defined by αT = 10.4 × 10−4/°C, reaching approximately 101.2 V at Tj = 125 °C using the formula VCL(Tj) = VCL(25 °C) × [1 + αT × (Tj − 25)].
Is SMC50J58A suitable for bidirectional signal line protection?
No - SMC50J58A is a unidirectional TVS diode intended for DC rail protection where surge polarity is known (e.g., positive transients on a grounded system). For bidirectional protection such as RS-485 or USB lines, the complementary SMC50J58CA variant must be used, which features symmetrical breakdown in both directions and identical electrical ratings except for polarity configuration.
Does SMC50J58A meet automotive qualification standards?
SMC50J58A is not AEC-Q101 qualified as a standalone component, but its electrical characteristics (175 °C Tjmax, 30 kV ESD immunity, and robust surge capability) align with automotive subsystem requirements. It has been deployed in non-safety-critical BCM and lighting modules where system-level validation replaces component-level AEC-Q101 certification - always verify compliance with specific OEM requirements.
What is the recommended PCB footprint for SMC50J58A?
The recommended footprint follows IPC-7531 and JEDEC MO-213 standards: pad length 5.11 mm (0.201"), pad width 3.14 mm (0.124"), center-to-center spacing 8.19 mm (0.323"), and copper area per pad ≥1.54 cm². Thermal relief vias under pads are advised for high-reliability applications to reduce junction temperature rise during repeated surge events.
SMC50J58A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-214AB, SMC
- Series:
- SMC50J
- Packaging:
- Tape & Reel (TR)
- 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):
- 53A
- Power - Peak Pulse:
- 5000W (5kW)
- 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
SMC50J58A FAQ
1.How can I place an order for SMC50J58A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J58A 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 SMC50J58A reliable?
The price and inventory of SMC50J58A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J58A is usually 5 days.
3.What payment methods are accepted for SMC50J58A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J58A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J58A?
SMC50J58A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J58A 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 SMC50J58A?
For technical support, including SMC50J58A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J58A requirements.
6.How does Aetrix verify that SMC50J58A is sourced from the original manufacturer or authorized distributors?
All SMC50J58A 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 SMC50J58A meets industry standards.
7.What is the process for return or replacement of SMC50J58A?
All SMC50J58A units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J58A, 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 SMC50J58A part is unused and in its original packaging.
Return procedure for SMC50J58A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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