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Semtech Corporation SC3BK6
- Part No.:
- SC3BK6
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- 5-Rectangle
- Datasheet:
-
SC3BK6.pdf
- Description:
- BRIDGE RECT 3PHASE 600V 13A
- Quantity:
- Payment:
- Shipping:
Inventory:5,045
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Product details
Overview
SC3BK6 from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across temperature and current range. Used in USB Type-C PD input protection and load switch front-end surge suppression.
For engineers reviewing the SC3BK6 datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and industrial load-switch protection use cases, and validated alternative parts with documented functional trade-offs.
Technical Context
The SC3BK6 employs a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under surge-achieving dynamic resistance of just 20mΩ at 8/20μs.
It operates from −40°C to +125°C with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and junction capacitance of 175pF at 22V/1MHz. Its 6-pin DFN (1.6×1.6×0.55mm) uses parallelized terminals: pins 4–6 as common input, pins 1–3 as common ground-enabling robust 40A surge conduction with minimal parasitic inductance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or degradation |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave) - ensures protected ICs (e.g., USB PD controllers) stay below damage threshold during surge |
| ESD Withstand | ±30kV contact & air per IEC 61000-4-2 - exceeds industrial and consumer ESD immunity requirements |
| Peak Pulse Current | 40A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS=42Ω) on unsymmetrical lines |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for 22V power rail protection without signal integrity impact on adjacent traces |
| Operating Temp | −40°C to +125°C - supports deployment in automotive cabin, industrial control, and outdoor IoT environments |
Pinout & Package
SC3BK6 is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. The compact footprint saves >50% board area versus SOT-23 or SOIC alternatives.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current - all three must be connected with low-inductance vias to maximize 40A capability |
| Pins 4, 5, 6 | IN | Parallel-connected input terminal for protected line - connects directly to VBus or power rail upstream of load switch or controller |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 1A to 40A and −40°C to +125°C - eliminates derating uncertainty vs. TVS diodes |
| Surge-rated FET core | Replaces pn-junction avalanche with low-RDS(on) shunt switch - dissipates energy in channel rather than junction, improving thermal stability |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during sub-100ns ESD events |
| High-energy rating | 1120W peak pulse power (8/20μs) - sustains repeated lightning-surge stress in industrial equipment without parametric shift |
| DFN-6 layout optimization | Three parallel GND and IN pins minimize trace inductance - enables placement within 3mm of USB-C connector for optimal ESD coupling control |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20V–22V VBus lines in USB-C PD ports against ESD, lightning-induced surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed between connector and PD controller or buck converter input. Use Value: Maintains 28V clamping at full 40A surge and 125°C ambient - prevents latch-up or gate oxide rupture in downstream silicon. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Surge shunt positioned before load switch VIN/EN to clamp transients before they reach sensitive gate drivers. Use Value: Limits voltage seen by internal FET to <28V - avoids overvoltage failure modes while preserving load switch OVP/UVLO functionality. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet DC-In Protection |
|
Use Scenario: Securing 12–24V DC input rails in battery-powered IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Standalone transient suppressor on main power entry point, upstream of PMIC or LDO. Use Value: 175pF capacitance avoids filtering interference on 100kHz–1MHz DC-DC switching nodes; 22V VRWM matches common industrial supply rails. |
Use Scenario: Reinforcing DC-in protection in thin-profile notebooks where space-constrained layouts limit TVS selection. IC Role / Device Role / Timing Role: Compact DFN-6 replacement for larger SOT-23 TVS on 20V adapter input paths. Use Value: 1.6×1.6mm footprint fits tight routing near barrel jack; ±30kV ESD rating meets OEM system-level compliance targets. |
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 die, same DFN-6 package, identical electrical specs - differs only in tape-and-reel packaging (3,000 pcs/reel vs. SC3BK6's unspecified quantity). | No functional difference; used interchangeably in production where reel size aligns with SMT line requirements. | Select TDS2211P.C when standard 7″ reel logistics are required; SC3BK6 may reflect alternate packaging or distribution channel variant. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 33V clamping, smaller 0.65×0.65mm DFN-2 package - optimized for CC/SBU lines, not power rails. | Not suitable for 22V VBus protection; intended for low-capacitance data-line protection where <0.5pF is critical. | Choose uClamp2411ZA only for auxiliary signal lines; SC3BK6 remains mandatory for main power rail EOS suppression. |
Compared with TDS2211P.C, SC3BK6 offers identical protection performance but may differ in packaging logistics; versus uClamp2411ZA, SC3BK6 provides 67% higher surge current rating and 21% lower clamping voltage-making it the sole viable option for 22V power rail hardening.
Availability
SC3BK6 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 across extended temperature ranges and high-volume production cycles.
Supply support for SC3BK6 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 high-performance analog and mixed-signal ICs for precision sensing, protection, and signal integrity.
The SC3BK6 belongs to Semtech's Transient Diverting Suppressor (TDS) product line-engineered specifically to replace traditional TVS diodes in high-voltage, high-energy EOS protection applications where clamping stability and temperature independence are critical.
FAQ
What is the maximum continuous operating voltage for SC3BK6?
The SC3BK6 has a reverse stand-off voltage (VRWM) of 22V, meaning it reliably blocks up to 22V DC without significant leakage current. This makes SC3BK6 suitable for protecting 20V USB PD buses and 24V industrial power rails where nominal voltage does not exceed this threshold.
Does SC3BK6 require external bias or control signals to operate?
No, SC3BK6 is a fully passive, self-triggering device. Its internal precision trigger circuit activates the shunt FET automatically when transient voltage exceeds the breakdown threshold-no external power, enable pin, or configuration is needed. SC3BK6 functions immediately upon installation in the signal path.
How does SC3BK6 compare to standard TVS diodes in clamping behavior?
Unlike TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC3BK6 maintains near-constant clamping (27.5–28V) from 1A to 40A due to its FET-based architecture. This eliminates design uncertainty caused by temperature drift and current scaling-key for SC3BK6 reliability in USB PD and industrial systems.
Can SC3BK6 be used on high-speed data lines like USB SuperSpeed?
No, SC3BK6 is not intended for high-speed data lines. With 175pF junction capacitance, it would severely degrade signal integrity on USB 3.x or PCIe lanes. SC3BK6 is designed exclusively for power rail or low-frequency control line protection. For SuperSpeed lines, Semtech recommends RClamp3371ZC (<0.25pF) instead of SC3BK6.
What PCB layout practices maximize SC3BK6's surge performance?
To maximize SC3BK6's 40A capability, connect all three GND pins (1–3) and all three IN pins (4–6) with short, wide copper traces and multiple thermal vias to an inner ground plane. Place SC3BK6 within 3mm of the protected connector, avoid stubs or right-angle bends, and ensure no other components share the GND return path-critical for achieving rated clamping performance.
SC3BK6 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):
- 600 V
- Current - Average Rectified (Io):
- 13 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 9 A
- Current - Reverse Leakage @ Vr:
- 9 µA @ 600 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- -
SC3BK6 FAQ
1.How can I place an order for SC3BK6 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3BK6 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 SC3BK6 reliable?
The price and inventory of SC3BK6 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3BK6 is usually 5 days.
3.What payment methods are accepted for SC3BK6?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3BK6 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3BK6?
SC3BK6 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3BK6 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 SC3BK6?
For technical support, including SC3BK6 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3BK6 requirements.
6.How does Aetrix verify that SC3BK6 is sourced from the original manufacturer or authorized distributors?
All SC3BK6 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 SC3BK6 meets industry standards.
7.What is the process for return or replacement of SC3BK6?
All SC3BK6 units undergo pre-shipment inspection (PSI). If there is an issue with SC3BK6, 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 SC3BK6 part is unused and in its original packaging.
Return procedure for SC3BK6:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC3BK6 Tags
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