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STMicroelectronics SMC50J5.0A
- Part No.:
- SMC50J5.0A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J5.0A.pdf
- Description:
- 5000 W, 5 V TVS IN SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,645
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Product details
Overview
SMC50J5.0A from STMicroelectronics is a unidirectional 5.0 V standoff transient voltage suppressor (TVS) diode designed for primary-level ESD and surge protection on DC power rails and low-speed signal lines. It delivers 5000 W peak pulse power (10/1000 μs), clamps to 9.2 V at 544 A, and operates up to 175 °C junction temperature-enabling robust protection in industrial power supplies and automotive body electronics.
For engineers reviewing the SMC50J5.0A datasheet, SMC50J5.0A pinout, SMC50J5.0A application, or SMC50J5.0A equivalent, key selection criteria include its 5.0 V VRM, 6.4–7.1 V breakdown range, <0.2 µA leakage at 25 °C, JEDEC-standard SMC package, and IEC 61000-4-2 ±30 kV contact/air discharge compliance.
Technical Context
This planar-junction TVS uses silicon avalanche technology to provide fast response (<1 ns) to electrostatic discharge and repetitive surges. Its unidirectional configuration supports anode-to-cathode forward conduction path with defined reverse standoff and controlled clamping behavior under transient stress.
The device meets IEC 61000-4-4 level 4 (4 kV), exceeds IEC 61000-4-2 level 4 (±30 kV), and maintains stable performance across -55 °C to +175 °C operating junction temperature-enabled by low thermal resistance and high-reliability matte tin lead finish.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 5.0 V - Maximum continuous reverse operating voltage before significant leakage begins. |
| Breakdown Voltage (VBR) | 6.4–7.1 V at 1 mA - Confirmed avalanche onset range ensuring predictable turn-on during transients. |
| Clamping Voltage (VCL) | 9.2 V at 544 A (10/1000 μs) - Limits downstream voltage to safe levels during 5 kW surges. |
| Peak Pulse Power | 5000 W (10/1000 μs) - Sustains high-energy transients without failure in standard industrial environments. |
| Leakage Current (IRM) | ≤0.2 µA at 5.0 V, 25 °C - Minimizes standby power loss and avoids false triggering in low-power circuits. |
| Junction Temperature Range | -55 °C to +175 °C - Enables deployment in under-hood automotive, industrial SMPS, and high-ambient environments. |
| ESD Withstand | ±30 kV (IEC 61000-4-2, contact & air) - Exceeds level 4 requirements for human-body-model robustness. |
Pinout & Package
SMC50J5.0A is housed in a JEDEC-standard SMC (DO-214AB) surface-mount package with matte tin-plated leads, compatible with IPC-7531 footprint and reflow profiles per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Forward current entry / cathode reference | Connected to ground or lower-potential rail; defines unidirectional conduction direction. |
| Cathode (K) | Reverse-biased terminal / clamping node | Connected to protected line; conducts avalanche current when voltage exceeds VRM. |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use up to +175 °C junction temperature-supports placement near heat sources in power converters. |
| Low dynamic resistance | 3.86 mΩ at 25 °C - Ensures tight clamping with minimal voltage overshoot during fast-rising transients. |
| Ultra-low leakage | ≤0.2 µA at VRM - Preserves battery life and signal integrity in always-on sensor and MCU I/O protection. |
| JEDEC-compliant SMC outline | Standardized mechanical dimensions (E2 = 4.4–4.7 mm, D = 5.55–6.25 mm) - Ensures automated assembly compatibility and thermal reliability. |
| IEC 61000-4-2/4-4 certified | Validated to ±30 kV ESD and 4 kV EFT - Eliminates need for external test validation in end-equipment certification. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) I/O |
|---|---|
|
Use Scenario: 24 V DC input rail of DIN-rail mounted PLC power supply exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Primary clamping element placed between input and ground, absorbing 5000 W surges within nanoseconds. Use Value: Prevents damage to upstream rectifier and downstream DC-DC controller by limiting transient voltage to ≤9.2 V. |
Use Scenario: LIN bus transceiver I/O pins in door module subjected to ESD events during assembly and field service. IC Role / Device Role / Timing Role: Unidirectional TVS connected cathode-to-LIN line, anode-to-ground-shunting ESD before it reaches transceiver ESD diodes. Use Value: Maintains signal integrity with <0.2 µA leakage and withstands ±30 kV contact discharge without degradation. |
| Smart Meter AC/DC Auxiliary Supply | Factory Automation Sensor Interface |
|
Use Scenario: 5 V auxiliary rail derived from mains-powered SMPS inside electricity meter, subject to conducted surges per IEC 61000-4-4. IC Role / Device Role / Timing Role: Standoff-rated TVS on secondary-side 5 V rail, placed immediately after LDO regulator output. Use Value: Clamps 4 kV EFT bursts to 9.2 V while operating reliably at 125 °C ambient due to 175 °C Tj rating. |
Use Scenario: Analog 4–20 mA current loop input of programmable logic controller exposed to cable-induced surges in dusty, humid factory environments. IC Role / Device Role / Timing Role: Unidirectional TVS on loop return path, referenced to system ground, protecting op-amp input stage. Use Value: Delivers 5000 W surge handling with 3.86 mΩ dynamic resistance-minimizing voltage rise during 500 A transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A (Bourns) | Same 5.0 V VRM, but 600 W (vs. 5000 W) peak power; SMB package (smaller thermal mass). | Limited to sub-1 kW surges; unsuitable for load-dump or high-energy industrial transients. | Select only for space-constrained, low-energy signal-line protection where 5000 W capability is unnecessary. |
| 1.5KE5.0A (Littelfuse) | Through-hole DO-201 package; same 5.0 V VRM and 5000 W rating, but higher leakage (5 µA vs. 0.2 µA). | Requires PCB real estate and wave-soldering; less suitable for high-density SMT designs. | Prefer for legacy through-hole systems or where manual repairability outweighs SMT efficiency. |
Compared with SMBJ5.0A and 1.5KE5.0A, SMC50J5.0A uniquely combines 5000 W surge capability, ultra-low leakage, SMT-compatible SMC packaging, and 175 °C operation-making it optimal for modern high-reliability industrial and automotive power rail protection.
Availability
SMC50J5.0A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, smart meter auxiliary rails, and factory automation sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for SMC50J5.0A 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 automotive, industrial, and power management solutions with over 40 years of analog and protection device expertise.
The SMC50J series belongs to ST's high-power TVS portfolio, engineered specifically for primary-level surge suppression in harsh-environment power conversion and control systems demanding extended temperature range and IEC-certified reliability.
FAQ
What is the maximum clamping voltage of SMC50J5.0A under a 10/1000 μs surge?
The maximum clamping voltage is 9.2 V at 544 A for a 10/1000 μs waveform, measured at 25 °C ambient. This value increases with junction temperature at a coefficient of 3.42 × 10⁻⁴ V/°C per the datasheet's αT parameter, reaching approximately 10.1 V at 125 °C junction temperature.
Is SMC50J5.0A suitable for bidirectional signal line protection?
No-SMC50J5.0A is unidirectional and must be used with cathode connected to the protected line and anode to ground. For bidirectional protection, ST offers the pin-compatible SMC50J5.0CA variant, which provides symmetrical clamping for AC or differential signal paths such as RS-485 or CAN.
Does SMC50J5.0A require derating at elevated ambient temperatures?
Yes-peak pulse power must be derated above 25 °C ambient per Figure 3 in DS13845. At 100 °C ambient, maximum PPP drops to ~3200 W for 10/1000 μs pulses. Derating is governed by thermal impedance and copper area; recommended PCB copper pads are specified in Figure 14 (5.11 mm × 8.19 mm minimum).
Can SMC50J5.0A be used in parallel to increase surge current handling?
Not recommended-minor VBR mismatches between units cause current imbalance, leading to premature failure of the lower-breakdown device. For higher current capability, select a single higher-rated part like SMC50J12A or implement staged protection with upstream current-limiting resistors and downstream low-capacitance TVS.
SMC50J5.0A 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):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 544A
- 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
SMC50J5.0A FAQ
1.How can I place an order for SMC50J5.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J5.0A 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 SMC50J5.0A reliable?
The price and inventory of SMC50J5.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J5.0A is usually 5 days.
3.What payment methods are accepted for SMC50J5.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J5.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J5.0A?
SMC50J5.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J5.0A 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 SMC50J5.0A?
For technical support, including SMC50J5.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J5.0A requirements.
6.How does Aetrix verify that SMC50J5.0A is sourced from the original manufacturer or authorized distributors?
All SMC50J5.0A 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 SMC50J5.0A meets industry standards.
7.What is the process for return or replacement of SMC50J5.0A?
All SMC50J5.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J5.0A, 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 SMC50J5.0A part is unused and in its original packaging.
Return procedure for SMC50J5.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J5.0A Tags
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