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STMicroelectronics SMC50J100A
- Part No.:
- SMC50J100A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMC50J100A.pdf
- Description:
- 5000 W, 100 V TVS IN SMC
- Quantity:
- Payment:
- Shipping:
Inventory:2,392
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Product details
Overview
SMC50J100A from STMicroelectronics is a unidirectional 100 V standoff voltage transient voltage suppression (TVS) diode in SMC package, rated for 5000 W peak pulse power (10/1000 μs), 2000 A peak pulse current, and 179 V clamping voltage at 2000 A - designed to protect power rails and I/O lines in industrial motor drives, telecom power supplies, and solar inverters against IEC 61000-4-2 ESD (±30 kV contact/air) and IEC 61000-4-4 EFT (4 kV).
For engineers reviewing the SMC50J100A datasheet, SMC50J100A pinout, SMC50J100A application, or SMC50J100A equivalent, this device delivers low leakage (0.2 µA at 25 °C), high junction temperature operation (Tj max = 175 °C), JEDEC-registered SMC footprint compatibility, and robust surge immunity per UL94 V0 and J-STD-020 MSL level 1 standards.
Technical Context
This planar-junction TVS diode uses silicon avalanche technology to clamp transient overvoltages within nanoseconds. Its unidirectional configuration provides forward conduction path only on cathode-to-anode polarity, enabling DC rail protection without reverse leakage concerns beyond VRM.
Clamping behavior is defined by dynamic resistance (RD = 392 mΩ at 25 °C), temperature coefficient αT = 10.7 × 10⁻⁴ /°C, and VCL–IPP relationship governed by VCL(max) = VBR(max) + RD × IPP(appli). Junction capacitance is <100 pF at VR = 0 V (f = 1 MHz), supporting high-speed signal line compatibility where applicable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 100 V - maximum continuous reverse operating voltage before significant leakage; sets minimum system rail rating for safe placement. |
| Breakdown Voltage (VBR) | 111–123 V at 1 mA - precise avalanche onset range ensures predictable turn-on during transients without premature conduction. |
| Clamping Voltage (VCL) | 179 V at 2000 A (10/1000 μs) - limits downstream component stress to ≤179 V under worst-case surge, critical for 150 V-rated MOSFETs or controllers. |
| Peak Pulse Power (PPP) | 5000 W (10/1000 μs) - sustains high-energy surges typical of lightning-induced ring waves or inductive switching in industrial AC/DC converters. |
| Leakage Current (IRM) | 0.2 µA at 100 V, 25 °C - negligible standby loss in battery-backed or ultra-low-power monitoring circuits. |
| Junction Temperature Range | −55 to +175 °C - supports operation in under-hood automotive modules, outdoor telecom enclosures, and high-temperature industrial PLCs. |
| Package | SMC (DO-214AB) - JEDEC-registered surface-mount outline with 7.75–8.15 mm width, 5.55–6.25 mm length, and 2.45 mm height; compatible with IPC-7531 footprint. |
Pinout & Package
SMC50J100A uses the standard SMC (DO-214AB) package: a two-terminal surface-mount device with cathode marked by a band on one end. The package features matte tin-plated leads, complies with J-STD-002 and JESD 22-B102 E3 solderability standards, and supports reflow per JEDEC J-STD-020 (MSL level 1).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; defines reference for clamping action during positive transients on cathode side. |
| Cathode | Protected line input | Connected to the line being protected (e.g., +100 V rail); conducts avalanche current to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| High surge capability | 5000 W (10/1000 μs) and up to 48 kW (8/20 μs) enables protection against severe lightning-induced surges in outdoor power systems. |
| Low clamping ratio | VCL/VBR ≈ 1.61 (179 V / 111 V) ensures minimal overvoltage margin - critical for safeguarding 200 V-class silicon carbide MOSFETs. |
| High-temperature reliability | Tj max = 175 °C and stable αT = 10.7 × 10⁻⁴ /°C allow sustained operation in thermally constrained environments like sealed motor drive cabinets. |
| Ultra-low leakage | 0.2 µA at VRM = 100 V reduces standby power loss in always-on industrial sensors and remote telemetry nodes. |
| Standardized footprint | JEDEC SMC outline and IPC-7531-compliant pad layout enable drop-in replacement and automated assembly without board redesign. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of DC bus inputs against regenerative energy spikes and IGBT switching transients in 3-phase VFDs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +100 V DC bus and chassis ground to clamp voltage excursions above 179 V within <1 ns. Use Value: Prevents gate oxide damage to 1200 V SiC half-bridge modules by limiting bus overvoltage to safe levels during fault conditions. |
Use Scenario: Input-stage surge suppression on −48 V telecom rectifier outputs exposed to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Cathode tied to −48 V rail, anode to ground; clamps negative-going transients while blocking normal reverse bias. Use Value: Maintains output regulation integrity during IEC 61000-4-4 level 4 (4 kV) bursts without triggering upstream OVP circuits. |
| Solar Inverters | Automotive Battery Management |
|
Use Scenario: DC-link protection in string inverters subjected to rapid voltage reversals during partial shading or grid faults. IC Role / Device Role / Timing Role: Mounted across PV+ and PV− inputs to absorb bidirectional energy from stray capacitance coupling and arc flash events. Use Value: Extends electrolytic capacitor lifetime by reducing RMS ripple voltage stress during repetitive 10/1000 μs surges up to 5000 W. |
Use Scenario: Protection of 12 V auxiliary power rails in EV battery packs against load-dump transients and jump-start spikes. IC Role / Device Role / Timing Role: Anode grounded, cathode on 12 V rail; clamps positive transients exceeding 179 V while remaining inactive below 100 V. Use Value: Eliminates need for secondary Zener-based crowbar circuits, simplifying BMS PCB layout and improving failure mode coverage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ100A (STMicroelectronics) | Lower PPP = 600 W (10/1000 μs); same VRM = 100 V, VBR = 111–123 V, but VCL = 165 V @ 38.8 A. | Targeted at lower-energy interfaces (e.g., CAN, RS-485), not high-power DC buses. | Select SMBJ100A only if surge energy is ≤600 W and space constraints favor SMB package. |
| 1.5KE100A (ON Semiconductor) | Through-hole DO-201 package; PPP = 1500 W (10/1000 μs); VCL = 165 V @ 9.1 A; higher leakage (5 µA). | Requires manual or wave soldering; unsuitable for high-density SMT production or thermal cycling reliability demands. | Choose 1.5KE100A only for legacy through-hole designs where rework tolerance outweighs surge performance needs. |
Compared with SMBJ100A and 1.5KE100A, SMC50J100A delivers 8.3× more surge energy handling than SMBJ100A and 3.3× more than 1.5KE100A - making it the sole option for protecting 100 V DC systems exposed to >3 kA lightning currents in industrial-grade equipment.
Availability
SMC50J100A is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, solar inverters, and automotive battery management systems requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for SMC50J100A 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and power applications.
SMC50J TVS series belongs to ST's high-reliability transient protection product line, engineered specifically for harsh-environment DC power rail protection where low leakage, high Tj, and standardized SMC packaging are mandatory.
FAQ
What is the maximum clamping voltage of SMC50J100A under a 10/1000 μs surge?
The maximum clamping voltage is 179 V at 2000 A for a 10/1000 μs waveform, measured at Tj = 25 °C. This value increases with junction temperature per αT = 10.7 × 10⁻⁴ /°C, reaching ~192 V at Tj = 125 °C using the formula VCL(Tj) = VCL(25 °C) × [1 + αT × (Tj − 25)].
Is SMC50J100A suitable for bidirectional signal line protection?
No - SMC50J100A is unidirectional and conducts only when cathode voltage exceeds anode voltage by ≥VBR. For bidirectional protection (e.g., USB, RS-232), use SMC50J100CA, which has symmetrical breakdown in both polarities and identical clamping performance.
Does SMC50J100A meet automotive AEC-Q200 requirements?
No - SMC50J100A is not AEC-Q200 qualified. It meets industrial reliability standards including JESD22-A108 (temperature cycling), JESD22-A110 (highly accelerated stress test), and JESD22-A101 (humidity testing), but lacks the extended temperature cycling, vibration, and qualification reporting required for automotive grade.
What is the recommended PCB footprint for SMC50J100A?
The recommended footprint matches IPC-7531 and JEDEC MO-213AA: pad length 5.11 mm (0.201″), pad width 1.54 mm (0.061″), center-to-center spacing 8.19 mm (0.323″), and copper area per pad ≥3.14 cm² to maintain Rth(j-a) ≤100 °C/W per Figure 12 of DS13845.
SMC50J100A 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):
- 100V (Max)
- Voltage - Breakdown (Min):
- 111V
- Voltage - Clamping (Max) @ Ipp:
- 179V
- Current - Peak Pulse (10/1000µs):
- 28A
- 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
SMC50J100A FAQ
1.How can I place an order for SMC50J100A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMC50J100A 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 SMC50J100A reliable?
The price and inventory of SMC50J100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMC50J100A is usually 5 days.
3.What payment methods are accepted for SMC50J100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMC50J100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMC50J100A?
SMC50J100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMC50J100A 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 SMC50J100A?
For technical support, including SMC50J100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMC50J100A requirements.
6.How does Aetrix verify that SMC50J100A is sourced from the original manufacturer or authorized distributors?
All SMC50J100A 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 SMC50J100A meets industry standards.
7.What is the process for return or replacement of SMC50J100A?
All SMC50J100A units undergo pre-shipment inspection (PSI). If there is an issue with SMC50J100A, 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 SMC50J100A part is unused and in its original packaging.
Return procedure for SMC50J100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMC50J100A Tags
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