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Semtech Corporation SC3BA1F
- Part No.:
- SC3BA1F
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- 5-Rectangle
- Datasheet:
-
SC3BA1F.pdf
- Description:
- BRIDGE RECT 3PHASE 100V 6A
- Quantity:
- Payment:
- Shipping:
Inventory:9,881
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Product details
Overview
SC3BA1F 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 24–40A, and 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the SC3BA1F datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and two validated alternative suppressors with documented functional trade-offs.
Technical Context
The SC3BA1F 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 across 24–40A and −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and junction capacitance of 175pF at 22V/1MHz. Its low 20mΩ dynamic resistance enables minimal voltage rise during high-current transients, while 130–600nA leakage at VRWM ensures minimal standby loading on protected lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without triggering |
| Clamping Voltage | 27.5–28V at 24–40A (1.2/50μs + 8/20μs combo wave, RS = 2Ω) - ensures downstream ICs like USB PD controllers remain below damage threshold |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD systems |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without derating |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping response and minimizes IR drop during surge conduction |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with DC-coupled 22V bus protection; not suitable for high-speed data lines |
Pinout & Package
SC3BA1F is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with 6 leads and UL 94V-0 molding compound. All pins must be soldered for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three must connect to low-inductance ground plane via multiple vias |
| 4, 5, 6 | IN | Protected line input - connects directly to VBus or power rail; all three pins conduct surge current in parallel |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V across full 24–40A range and −40°C to +125°C - eliminates thermal derating uncertainty |
| FET-based shunt topology | Surge energy dissipated in low-RDS(on) channel instead of PN junction - avoids thermal runaway and enables higher IPP density |
| Low dynamic resistance | 20mΩ ensures <0.8V additional voltage rise at 40A - preserves margin between clamp and IC absolute maximum ratings |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive burst noise in motor drives and PLCs |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V–22V VBus lines in USB-C PD ports against lightning surges, ESD, and hot-plug transients. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed immediately after connector, clamping transients before they reach PD controller or load switch. Use Value: Maintains 27.5–28V clamp across temperature and current - prevents overvoltage damage to 24V-tolerant PD controllers without oversizing IPP. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage seen by internal FET gate oxide and drain-source junction. Use Value: Keeps clamping voltage below 30V - avoids gate oxide rupture and avalanche failure in 30V-rated load switches during 1kV/42Ω surges. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary rails in battery-backed IoT gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution for DC power rail protection - replaces multi-stage TVS+MOV designs. Use Value: 40A surge rating and −40°C to +125°C operation ensure reliability in uncontrolled outdoor environments without thermal derating. |
Use Scenario: Protecting 22V backup supplies in NVMe SSDs and enterprise storage controllers during system-level surge events. IC Role / Device Role / Timing Role: Low-leakage (≤600nA) protector that avoids DC loading on always-on backup rails. Use Value: 130–600nA reverse leakage at 22V ensures minimal self-discharge - extends hold-up time in capacitor-backed supplies. |
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, identical marking code T22 - direct Semtech manufacturing variant of SC3BA1F | No functional difference; used interchangeably in BOMs requiring Semtech's standard tape-and-reel packaging (3,000 pcs/reel) | Select when sourcing from authorized Semtech distributors with standard reel logistics |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A - higher clamping, no constant-clamp behavior, 10× higher dynamic resistance | Requires larger IPP rating to achieve comparable clamp; clamping rises with temperature and current - unsuitable for tight-margin 24V systems | Choose only if cost sensitivity outweighs clamping stability and thermal performance requirements |
Compared with SC3BA1F, TDS2211P.C offers identical protection performance with standardized packaging, while SMAJ22A provides lower-cost surge suppression at the expense of 8V higher clamping and significant thermal derating - making SC3BA1F the preferred choice for 22V USB PD and industrial load switch protection where voltage margin is constrained.
Availability
SC3BA1F is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power rails requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for SC3BA1F 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 semiconductors for power management, protection, and signal integrity.
SC3BA1F belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where flat clamping, temperature stability, and high IPP density are mandatory.
FAQ
What is the exact package type and dimensions of SC3BA1F?
SC3BA1F uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction and UL 94V-0 flammability rating. Pin 1 is marked with a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern requires full soldering of all six terminals to achieve rated 40A surge performance.
Does SC3BA1F meet IEC 61000-4-5 surge immunity standards?
Yes, SC3BA1F is rated for 40A peak pulse current with 8/20μs waveform per IEC 61000-4-5, and supports ±1kV combination-wave testing (1.2/50μs voltage + 8/20μs current, RS = 42Ω). Its 27.5–28V clamping ensures compliance with industrial surge immunity requirements for 22V systems without additional external components.
How does SC3BA1F differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC3BA1F maintains 27.5–28V clamping across 24–40A due to its FET-based shunt architecture and sub-20mΩ dynamic resistance. This eliminates thermal derating and provides predictable protection in wide-temperature industrial environments.
Can SC3BA1F be used on high-speed data lines such as USB SuperSpeed or PCIe?
No, SC3BA1F is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V would severely degrade signal integrity on differential pairs operating above ~100MHz. It is intended exclusively for DC-coupled power or low-frequency control lines - use RClamp3371ZC (<0.25pF) for USB SS or DP/DM lines.
What is the maximum operating temperature range for SC3BA1F?
SC3BA1F is specified for continuous operation from −40°C to +125°C ambient temperature, with junction temperature rated up to +150°C. Clamping voltage remains stable across this full range - confirmed by characterization data showing ≤0.5V variation from −40°C to +125°C at 40A surge.
SC3BA1F 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):
- 6 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 3 A
- Current - Reverse Leakage @ Vr:
- 3 µA @ 100 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- QC Terminal
- Supplier Device Package:
- -
SC3BA1F FAQ
1.How can I place an order for SC3BA1F through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3BA1F 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 SC3BA1F reliable?
The price and inventory of SC3BA1F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3BA1F is usually 5 days.
3.What payment methods are accepted for SC3BA1F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3BA1F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3BA1F?
SC3BA1F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3BA1F 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 SC3BA1F?
For technical support, including SC3BA1F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3BA1F requirements.
6.How does Aetrix verify that SC3BA1F is sourced from the original manufacturer or authorized distributors?
All SC3BA1F 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 SC3BA1F meets industry standards.
7.What is the process for return or replacement of SC3BA1F?
All SC3BA1F units undergo pre-shipment inspection (PSI). If there is an issue with SC3BA1F, 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 SC3BA1F part is unused and in its original packaging.
Return procedure for SC3BA1F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC3BA1F Tags
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