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Semtech Corporation SC3BA4F
- Part No.:
- SC3BA4F
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- 5-Rectangle
- Datasheet:
-
SC3BA4F.pdf
- Description:
- BRIDGE RECT 3PHASE 400V 6A
- Quantity:
- Payment:
- Shipping:
Inventory:8,944
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Product details
Overview
SC3BA4F from Semtech is a Transient Diverting Suppressor designed for single-line 22V EOS protection in high-reliability I/O and power bus applications. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and operates from –40°C to +125°C. It is deployed in USB Type-C PD interfaces to protect controllers from voltage overshoot beyond 22V operating limits.
For engineers reviewing the SC3BA4F datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp behavior across temperature and current, ultra-low dynamic resistance (20mΩ), 175pF junction capacitance at 22V, DFN 1.6×1.6mm package footprint, and compatibility with industrial surge standards (±1kV, 1.2/50μs).
Technical Context
The SC3BA4F uses a surge-rated FET as the primary protection element, activated by a precision trigger circuit that senses overvoltage events. 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 features three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3) to minimize parasitic inductance and maximize surge current handling. Its solid-state architecture enables stable performance across –40°C to +125°C without thermal derating of clamping or peak current capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - Matches nominal USB PD bus voltage; ensures no leakage or conduction during normal operation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - Remains stable across full rated current and temperature range; protects downstream ICs with tight VMAX margins. |
| Peak Pulse Current | 40A (8/20μs) - Meets IEC 61000-4-5 Level 3/4 surge requirements for industrial and USB PD applications. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - Exceeds automotive and industrial ESD immunity requirements without external staging. |
| Junction Capacitance | 175pF at 22V, 1MHz - Low enough for USB Type-C VBUS line protection without signal integrity degradation. |
| Dynamic Resistance | 20mΩ (1–40A, 8/20μs) - Enables flat clamping curve; reduces voltage overshoot during fast-rising transients. |
Pinout & Package
SC3BA4F is housed in a RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with six leads and no exposed thermal pad. All pins must be soldered for full surge rating compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Low-inductance ground return path; all three must be connected to PCB ground plane via multiple vias for 40A surge current handling. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected bus (e.g., USB PD VBUS); equalizes current sharing and minimizes trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant Clamping Voltage | 27.5–28V across 24–40A and –40°C to +125°C - Eliminates need for derating or safety margin inflation in thermal-aware designs. |
| Ultra-Low Dynamic Resistance | 20mΩ - Reduces voltage overshoot during sub-microsecond transients; critical for protecting sensitive load switches and PD controllers. |
| High-Energy Surge Rating | 1120W peak pulse power (8/20μs) - Supports repeated industrial-level surges without parameter drift or degradation. |
| Low-Leakage Protection | 600nA max reverse leakage at 22V - Prevents standby power loss in battery-powered IoT and portable devices. |
Applications
| USB Type-C Power Delivery | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the VBUS line of a USB Type-C port supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller or load switch. Use Value: Maintains 27.5–28V clamping at full 40A surge, preventing damage to PD controllers rated for ≤30V absolute maximum. |
Use Scenario: Safeguarding the input of an industrial-grade load switch (e.g., HS2950P) exposed to lightning-induced surges on remote metering equipment. IC Role / Device Role / Timing Role: Front-end transient diverter that clamps before internal FET breakdown occurs. Use Value: Limits voltage stress on the load switch's internal MOSFET gate oxide and drain-source junction, extending field lifetime. |
| IoT Edge Node Power Bus | Notebook/Tablet VBUS Line Protection |
Use Scenario: Securing the 22V-rated power rail of a ruggedized IoT gateway subjected to ESD in factory-floor environments. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks for space-constrained edge nodes. Use Value: Delivers ±30kV ESD immunity and 40A surge handling in 2.56mm² footprint-reducing BOM count and PCB area by >60% vs. discrete alternatives. |
Use Scenario: Protecting the VBUS input of a notebook's USB-C charging circuit against hot-plug transients and accidental short-to-VBUS. IC Role / Device Role / Timing Role: Fast-acting shunt suppressor placed immediately at the USB-C receptacle. Use Value: 175pF capacitance avoids signal integrity issues on adjacent high-speed lanes; stable clamping prevents brownout or reset during surge events. |
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 1.6×1.6mm package, identical marking (T22), and same tape-and-reel packaging (3,000/reel). | No functional or layout difference; direct manufacturer-recommended variant with full traceability and qualification. | Select TDS2211P.C when requiring Semtech's fully qualified production part with documented lot traceability and extended lifecycle support. |
| SMAJ22A | Standard unidirectional TVS diode; 22V standoff, 35.5V clamping at 12.3A (8/20μs); higher dynamic resistance (~0.5Ω); clamping rises with temperature and current. | Limited to lower-energy surges; requires larger safety margin for same protection level; unsuitable for 40A or high-temp industrial use. | Choose SMAJ22A only for cost-sensitive, low-surge-risk consumer applications where clamping stability and temperature independence are not required. |
Compared with SC3BA4F, TDS2211P.C offers identical performance and qualification with full manufacturer support, while SMAJ22A trades clamping stability and surge capacity for lower unit cost-making it viable only in thermally benign, low-IPP environments.
Availability
SC3BA4F is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle assurance, and consistent surge performance across temperature extremes.
Supply support for SC3BA4F 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 protection, sensing, and connectivity.
The SC3BA4F belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications demanding stable clamping, wide temperature operation, and minimal board space.
FAQ
What is the exact package type and dimensions of SC3BA4F?
SC3BA4F uses a DFN package measuring 1.6mm × 1.6mm × 0.55mm with six leads. Pins 1–3 are ground terminals; Pins 4–6 are parallel-connected input terminals. The package is Pb-free, halogen-free, RoHS/WEEE compliant, and carries UL 94V-0 flammability rating. No thermal pad is required-the device dissipates energy internally.
Does SC3BA4F meet IEC 61000-4-5 surge immunity requirements?
Yes, SC3BA4F is rated for 40A peak pulse current (8/20μs waveform) and ±1kV combination wave (1.2/50μs voltage, 8/20μs current, RS = 42Ω), satisfying IEC 61000-4-5 Level 3 and Level 4 industrial surge test requirements. Its constant clamping voltage ensures predictable protection margin regardless of ambient temperature or surge magnitude within rating.
How does SC3BA4F differ from standard TVS diodes like SMAJ22A?
SC3BA4F uses a triggered FET architecture instead of a pn-junction diode. This yields near-constant clamping voltage (27.5–28V) across 24–40A and –40°C to +125°C, unlike SMAJ22A whose clamping rises linearly with current and temperature. SC3BA4F also offers 20mΩ dynamic resistance versus SMAJ22A's ~0.5Ω, reducing overshoot during fast transients.
Can SC3BA4F be used to protect USB Type-C CC lines?
No-SC3BA4F is intended for 22V power bus (VBUS) protection, not low-voltage data or configuration channel (CC) lines. For CC/SBU protection, Semtech recommends uClamp2411ZA (24V-rated, low-capacitance TVS). Using SC3BA4F on CC lines would cause unintended conduction due to its 22V working voltage and lack of bidirectional symmetry.
What is the maximum junction temperature and storage temperature range for SC3BA4F?
SC3BA4F has a junction and storage temperature range of –55°C to +150°C, with continuous operating temperature from –40°C to +125°C. Its clamping voltage and peak pulse current rating remain fully specified across this full operating range-no derating is required up to +125°C, unlike conventional TVS devices.
SC3BA4F 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):
- 400 V
- Current - Average Rectified (Io):
- 6 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 3 A
- Current - Reverse Leakage @ Vr:
- 3 µA @ 400 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- QC Terminal
- Supplier Device Package:
- -
SC3BA4F FAQ
1.How can I place an order for SC3BA4F through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3BA4F 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 SC3BA4F reliable?
The price and inventory of SC3BA4F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3BA4F is usually 5 days.
3.What payment methods are accepted for SC3BA4F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3BA4F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3BA4F?
SC3BA4F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3BA4F 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 SC3BA4F?
For technical support, including SC3BA4F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3BA4F requirements.
6.How does Aetrix verify that SC3BA4F is sourced from the original manufacturer or authorized distributors?
All SC3BA4F 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 SC3BA4F meets industry standards.
7.What is the process for return or replacement of SC3BA4F?
All SC3BA4F units undergo pre-shipment inspection (PSI). If there is an issue with SC3BA4F, 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 SC3BA4F part is unused and in its original packaging.
Return procedure for SC3BA4F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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