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Semtech Corporation SC3AS6
- Part No.:
- SC3AS6
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- Module
- Datasheet:
-
SC3AS6.pdf
- Description:
- BRIDGE RECT 3PHASE 600V 18A
- Quantity:
- Payment:
- Shipping:
Inventory:4,821
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Product details
Overview
SC3AS6 from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance - deployed in USB PD, USB Type-C, and industrial load switch input protection.
For engineers reviewing the SC3AS6 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection in high-reliability embedded and portable systems.
Technical Context
The SC3AS6 uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transient current to ground. Its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to the FET's decreasing RDS(on) under surge conditions.
Unlike conventional TVS diodes, SC3AS6 maintains stable clamping across −40°C to +125°C and exhibits low 175pF junction capacitance at 22V, enabling robust protection without signal integrity degradation on high-speed or high-voltage interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - supports continuous operation on 20V USB PD buses and industrial 24V nominal rails without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - stays below typical 28–30V damage thresholds of USB PD controllers and load switches. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial and portable equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and consumer ESD immunity standards without derating. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise during surge conduction, critical for maintaining low clamping under high dI/dt transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with USB Type-C VBUS line protection without affecting power delivery handshake timing. |
Pinout & Package
SC3AS6 is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals are required for full 40A surge rating: pins 1–3 serve as parallel ground connections, and pins 4–6 form a low-inductance protected input node.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Parallel ground terminals - must be connected to a low-impedance ground plane via multiple vias to minimize parasitic inductance during 40A surges. |
| 4, 5, 6 | IN | Protected input node - connects directly to VBUS or power rail; all three pins must be shorted externally to achieve rated 40A capability and uniform current sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for oversized IPP margining common with TVS diodes. |
| Temperature-stable protection | Clamping remains 27.5–28V from −40°C to +125°C - enables reliable operation in uncooled industrial enclosures and automotive under-hood environments. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces power dissipation and thermal stress during repeated surge events. |
| High-energy EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor-driven and switching-power industrial systems. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed immediately after the connector, clamping transients before they reach the PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids false overvoltage shutdowns and ensures PD communication integrity during surge events. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways subjected to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Front-end transient suppressor that limits voltage across the load switch's internal FET drain-source during EOS events. Use Value: Prevents FET avalanche failure by holding clamping voltage below 28V - extends system uptime and eliminates need for redundant overvoltage lockout circuits. |
| Storage Device Power Rail Protection | Notebook/Tablet VBUS Line Protection |
Use Scenario: Securing 22V-rated power inputs on NVMe SSDs, SATA drives, and external storage enclosures operating in electrically noisy data centers. IC Role / Device Role / Timing Role: Single-device solution for IEC 61000-4-5 compliance on 22V supply rails, replacing multi-component TVS+capacitor networks. Use Value: Reduces board area by >50% vs. discrete TVS + RC snubber solutions while delivering superior clamping consistency and lower leakage (<600nA). |
Use Scenario: Protecting VBUS routing in thin-client notebooks and Android tablets where PCB space and thermal headroom are constrained. IC Role / Device Role / Timing Role: Compact 1.6×1.6mm DFN suppressor mounted adjacent to USB-C receptacle to minimize trace inductance and coupling. Use Value: Enables 22V working voltage support with only 175pF capacitance - avoids signal distortion on PD CC logic lines and preserves USB 3.2 Gen 2 signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, pinout, and package - direct replacement with same marking code T22 and tape/reel packaging (3,000 pcs/reel). | No functional difference; used interchangeably in USB PD reference designs and Semtech evaluation boards. | Select TDS2211P when sourcing from authorized Semtech distributors with full traceability and qualification documentation. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP rating and higher 32V clamping at 20A - lacks constant-clamp FET architecture. | Suitable for CC/SBU lines in USB-C, not recommended for 22V VBUS due to insufficient surge margin and temperature drift. | Choose uClamp2411ZA only for auxiliary signal lines; avoid for main power rail protection where SC3AS6's 40A/28V performance is required. |
Compared with TDS2211P, SC3AS6 offers identical protection performance and drop-in compatibility; versus uClamp2411ZA, SC3AS6 delivers 2× peak current handling and 4V lower clamping - making it the sole qualified option for 22V bus-level surge compliance in industrial and USB PD systems.
Availability
SC3AS6 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch front-ends, and high-reliability storage device power rails requiring stable component supply, long-term lifecycle assurance, and full RoHS/WEEE compliance.
Supply support for SC3AS6 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
Semtech Corporation is a U.S.-based fabless semiconductor company specializing in analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
SC3AS6 belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-voltage, high-energy EOS applications where clamping stability and temperature independence are critical.
FAQ
What is the maximum continuous operating voltage for SC3AS6?
The SC3AS6 has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage. This makes SC3AS6 suitable for 20V USB PD buses and 24V nominal industrial rails where transient spikes must be suppressed without interfering with normal operation.
Does SC3AS6 require a thermal pad or heatsink for 40A surge handling?
No - SC3AS6 dissipates surge energy through its internal FET channel rather than a PN junction, eliminating the need for external thermal management. The DFN-6 package relies on low-inductance grounding of pins 1–3 and proper PCB copper pour; no thermal pad or heatsink is specified in the datasheet or layout guidelines.
Can SC3AS6 be used on high-speed data lines like USB SuperSpeed or PCIe?
No - SC3AS6 is intended exclusively for power rail or low-frequency I/O protection (e.g., VBUS, CC, SBU, load switch inputs). Its 175pF junction capacitance would severely degrade signal integrity on differential high-speed lanes; use low-capacitance devices like RClamp3371ZC instead for those paths.
How does SC3AS6 differ from standard TVS diodes in clamping behavior?
Standard TVS diodes exhibit linear clamping rise (VC = VBR + IPP × RDYN), causing voltage to increase with surge current. SC3AS6 uses a triggered FET architecture that maintains ~27.5–28V clamping from 24A to 40A - a key advantage for protecting voltage-sensitive PD controllers and load switches.
Is SC3AS6 pin-compatible with other Semtech TDS devices like TDS2411P?
No - SC3AS6 shares the DFN-6 footprint with TDS2211P but differs from TDS2411P (24V variant) in pin function and internal trigger threshold. TDS2411P is not documented as pin-compatible; substituting it for SC3AS6 may result in overclamping or premature triggering on 22V rails.
SC3AS6 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Module
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Diode Type:
- Three Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 600 V
- Current - Average Rectified (Io):
- 18 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 18 A
- Current - Reverse Leakage @ Vr:
- 18 µA @ 600 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- -
SC3AS6 FAQ
1.How can I place an order for SC3AS6 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3AS6 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 SC3AS6 reliable?
The price and inventory of SC3AS6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3AS6 is usually 5 days.
3.What payment methods are accepted for SC3AS6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3AS6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3AS6?
SC3AS6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3AS6 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 SC3AS6?
For technical support, including SC3AS6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3AS6 requirements.
6.How does Aetrix verify that SC3AS6 is sourced from the original manufacturer or authorized distributors?
All SC3AS6 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 SC3AS6 meets industry standards.
7.What is the process for return or replacement of SC3AS6?
All SC3AS6 units undergo pre-shipment inspection (PSI). If there is an issue with SC3AS6, 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 SC3AS6 part is unused and in its original packaging.
Return procedure for SC3AS6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC3AS6 Tags
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