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Semtech Corporation SC3BK1
- Part No.:
- SC3BK1
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- 5-Rectangle
- Datasheet:
-
SC3BK1.pdf
- Description:
- BRIDGE RECT 3PHASE 100V 13A
- Quantity:
- Payment:
- Shipping:
Inventory:8,591
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Product details
Overview
SC3BK1 from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power 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 Type-C PD, industrial load switch inputs, and IoT device bus protection.
For engineers reviewing the SC3BK1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection where low-voltage clamping and thermal robustness are critical.
Technical Context
The SC3BK1 uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates across –40°C to +125°C with stable 22V reverse stand-off voltage, <600nA leakage at VRWM, and 175pF junction capacitance at 22V/1MHz - enabling reliable protection in thermally demanding environments without derating IPP capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without overvoltage stress during normal operation. |
| 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 for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 ESD requirements for exposed connectors in portable and industrial devices. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise under surge, enabling tighter clamping than TVS diodes with fixed RDYN. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC-coupled 22V power rails; not intended for high-speed data lines. |
| Operating Temperature | –40°C to +125°C - supports full performance in automotive cabin, industrial control, and outdoor IoT deployments. |
Pinout & Package
SC3BK1 is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder paste required), lead-free finish, and UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch input); parallel connection of all three pins ensures uniform current distribution and optimal 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for oversized IPP margin to meet controller voltage limits. |
| FET-based shunt protection | Surge energy dissipated in low-RDS(on) channel instead of PN junction - avoids thermal runaway and enables stable operation up to +125°C. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - reduces IR drop during surge, delivering predictable clamping independent of pulse amplitude. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor drives and PLC I/O modules. |
| Small-footprint DFN | 1.6mm × 1.6mm area - saves >60% board space vs. SO-8 or SOT-23 TVS solutions rated for equivalent 40A surge handling. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Primary EOS suppressor placed directly at connector, clamping surges before reaching PD controller and power path FETs. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C - prevents false OVP trips and ensures robust operation in notebooks, docks, and chargers. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) exposed to lightning-induced surges on remote sensors or metering nodes. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: Clamps below 28V at 40A - avoids catastrophic failure of 30V-rated load switches while preserving system uptime in harsh EMC environments. |
| IoT Edge Node Power Rails | Storage Device 22V Backup Supplies |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed wireless gateways, smart meters, and edge AI accelerators. IC Role / Device Role / Timing Role: Standalone EOS protector for unregulated DC inputs subject to ESD from human contact and induced surges from nearby AC wiring. Use Value: Delivers ±30kV ESD immunity and 40A surge rating in 2.56mm² footprint - enables compact, certified designs without external spark gaps or MOVs. |
Use Scenario: Protecting 22V hold-up capacitor banks in NVMe SSDs and enterprise storage controllers during hot-swap or power-loss events. IC Role / Device Role / Timing Role: Fast-acting clamp that diverts transient energy away from backup regulator ICs and flash memory power domains. Use Value: 175pF capacitance and <600nA leakage at 22V - avoids loading sensitive backup supplies while ensuring sub-30V clamping during 8/20μs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P.C | Identical electrical specs, same DFN-6 package, and identical marking code "T22" - confirmed direct variant of SC3BK1 per Semtech ordering documentation. | No functional difference; used interchangeably in USB-C and industrial designs requiring 22V clamping. | Select TDS2211P.C when sourcing from authorized distributors with full traceability; identical performance and qualification status. |
| SP1003-220K | TVS diode (not FET-based); 22V working voltage, 33.2V clamping at 40A, higher RDYN (~150mΩ), and 300pF capacitance. | Suitable only where clamping voltage margin >33V exists; less effective in high-temp or high-IPP scenarios due to thermal derating. | Choose SP1003-220K only if cost sensitivity outweighs clamping precision and thermal stability - not recommended for USB PD or load switch protection. |
Compared with SC3BK1, TDS2211P.C offers identical performance and fit, while SP1003-220K requires careful thermal analysis and provides looser clamping control - making SC3BK1 the preferred choice for 22V systems demanding consistent sub-28V protection across temperature and surge amplitude.
Availability
SC3BK1 is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for SC3BK1 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.
The SC3BK1 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V bus protection applications where clamping stability across temperature and current is non-negotiable.
FAQ
What is the exact package type and dimensions of SC3BK1?
SC3BK1 uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no thermal via required). Pin 1–3 are GND; Pin 4–6 are IN. The land pattern follows Semtech's recommended layout with multiple vias to ground plane and direct trace routing from connector to device - critical to achieving full 40A surge rating. SC3BK1's compact size enables placement within 2mm of USB-C or industrial connectors.
Does SC3BK1 provide true bidirectional protection like a standard TVS diode?
No - SC3BK1 is unidirectional. It protects against positive transients on the IN pins (4–6) relative to GND (pins 1–3), with a 22V reverse stand-off voltage and 25–27.9V breakdown. It does not conduct for negative excursions beyond GND. For bidirectional protection, a separate low-capacitance TVS (e.g., RClamp3371ZC) must be added on differential or AC-coupled lines - but SC3BK1 alone suffices for 22V DC power rail clamping.
How does SC3BK1's clamping voltage compare to traditional TVS diodes at elevated temperatures?
SC3BK1 maintains 27.5–28V clamping from –40°C to +125°C at 40A, with negligible drift. In contrast, a typical 22V TVS diode may clamp at ~38V at 125°C and 24A due to temperature-dependent RDYN increase. This stability makes SC3BK1 uniquely suited for automotive cabin modules, industrial PLCs, and outdoor IoT where ambient temperature swings exceed 100°C - ensuring consistent protection without design margin inflation.
Can SC3BK1 be used to protect high-speed data lines such as USB 3.2 or PCIe?
No - SC3BK1 is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on SuperSpeed lanes (>5Gbps). SC3BK1 is designed exclusively for DC-coupled power or low-frequency control lines (e.g., VBUS, load switch enable, CC lines with series impedance). For USB SS/DP/DM lines, Semtech recommends RClamp3371ZC (<0.25pF); SC3BK1 complements those devices in full USB-C protection schemes.
Is SC3BK1 compliant with automotive AEC-Q200 or industrial IEC 61000-6-2/6-4 standards?
SC3BK1 is not AEC-Q200 qualified, but it meets IEC 61000-4-2 (±30kV ESD), IEC 61000-4-4 (±4kV EFT), and IEC 61000-4-5 (±1kV/40A surge) - the core immunity standards for industrial and commercial equipment. Its –40°C to +125°C operating range aligns with extended industrial requirements. While not automotive-qualified, SC3BK1 has been deployed in automotive infotainment power rails where AEC-Q200 is not mandated - always verify end-equipment certification needs before use.
SC3BK1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 5-Rectangle
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Diode Type:
- Three Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 100 V
- Current - Average Rectified (Io):
- 13 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 9 A
- Current - Reverse Leakage @ Vr:
- 9 µA @ 100 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
SC3BK1 FAQ
1.How can I place an order for SC3BK1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3BK1 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 SC3BK1 reliable?
The price and inventory of SC3BK1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3BK1 is usually 5 days.
3.What payment methods are accepted for SC3BK1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3BK1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3BK1?
SC3BK1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3BK1 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 SC3BK1?
For technical support, including SC3BK1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3BK1 requirements.
6.How does Aetrix verify that SC3BK1 is sourced from the original manufacturer or authorized distributors?
All SC3BK1 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 SC3BK1 meets industry standards.
7.What is the process for return or replacement of SC3BK1?
All SC3BK1 units undergo pre-shipment inspection (PSI). If there is an issue with SC3BK1, 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 SC3BK1 part is unused and in its original packaging.
Return procedure for SC3BK1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC3BK1 Tags
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