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Semtech Corporation SC3BH4F
- Part No.:
- SC3BH4F
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-Rectangle
- Datasheet:
-
SC3BH4F.pdf
- Description:
- BRIDGE RECT 3PHASE 400V 3A
- Quantity:
- Payment:
- Shipping:
Inventory:8,239
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Product details
Overview
SC3BH4F from Semtech is a transient diverting suppressor 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 SC3BH4F datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, temperature-stable clamping behavior, and direct alternatives for 22V bus protection in high-reliability embedded and portable systems.
Technical Context
The SC3BH4F uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transients to ground. Its clamping voltage remains nearly constant across 24–40A peak pulse current due to decreasing RDS(on) under surge conditions.
Unlike conventional TVS diodes, SC3BH4F maintains stable 27.5–28V clamping from −40°C to +125°C and exhibits low 175pF junction capacitance at 22V reverse bias - enabling robust protection without signal integrity degradation on high-speed or thermally demanding 22V power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo waveform) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements with RS = 2Ω. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 ESD immunity for handheld and interface connectors. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for use on USB PD VBUS and load switch inputs without degrading power rail stability. |
| Operating Temp | −40°C to +125°C - supports deployment in automotive cabin, industrial control, and ruggedized IoT edge nodes. |
Pinout & Package
SC3BH4F is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required - all six terminals are functional and must be connected per layout guidelines for full 40A surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to minimize inductance and maximize current sharing. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch VIN); parallel connection ensures uniform current distribution and thermal derating control. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A surge range and −40°C to +125°C - eliminates thermal runaway risk seen in standard TVS diodes. |
| FET-based shunt topology | Surge energy dissipated via low-RDS(on) FET channel instead of PN-junction - enables higher IPP and lower thermal stress than TVS. |
| Low dynamic resistance | 20mΩ measured between 1A–40A (8/20μs) - reduces voltage overshoot during fast-rising surges and improves system-level immunity margin. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz bursts) - protects against repetitive switching noise in motor drives and industrial PLCs. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20–22V VBUS lines in USB-C receptacles supporting up to 100W PD negotiation. IC Role / Device Role / Timing Role: Transient diverting suppressor placed at connector entry point to clamp lightning-induced surges and ESD before reaching PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents false OVP trips and avoids over-spec'ing IPP to compensate for TVS voltage drift. |
Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Primary front-end EOS protector that limits voltage stress on internal FET gate oxide and drain-source junction during 1kV/42Ω surges. Use Value: Enables use of smaller, lower-cost load switches by holding clamping below 30V - eliminating need for external series resistors or Zener clamps. |
| IoT Edge Node Power Rail Protection | Tablet & Notebook VBUS Surge Suppression |
Use Scenario: Securing 22V auxiliary power inputs in battery-backed smart sensors and wireless gateways exposed to field ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution for IEC 61000-4-2/4-4/4-5 compliance on compact PCBs where space and thermal mass are constrained. Use Value: 1.6mm × 1.6mm footprint saves >60% board area vs. discrete TVS + RC snubber solutions while delivering superior clamping consistency. |
Use Scenario: Hardening 20V+ charging rails in ultraportables against accidental short-to-VBUS and hot-plug transients during USB-C cable insertion. IC Role / Device Role / Timing Role: Fast-acting shunt device that activates within nanoseconds of overvoltage detection to protect PMICs and battery charge controllers. Use Value: 175pF capacitance avoids destabilizing buck converter feedback loops - unlike higher-capacitance TVS arrays requiring additional filtering. |
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 - same die, same Semtech qualification; SC3BH4F is a valid alternate marking per Semtech ordering documentation. | No functional difference; both qualified for USB PD, industrial, and computing applications per same datasheet Rev 2.5. | Select SC3BH4F when sourcing through Aetrix Electronics' certified Semtech channel - identical performance, traceable lot history, and full lifecycle support. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP and higher 32V clamping at 20A - uses silicon avalanche diode, not FET-shunt architecture. | Suitable for CC/SBU lines in USB-C, not VBUS; lacks temperature-stable clamping and cannot handle 40A surges. | Use uClamp2411ZA only for low-current signaling lines; SC3BH4F is required for 22V power rail protection where clamping stability and 40A rating are mandatory. |
Compared with TDS2211P, SC3BH4F offers identical protection performance and drop-in compatibility; versus uClamp2411ZA, SC3BH4F provides 2× peak current handling, 4.5V lower clamping, and FET-based thermal resilience - making it the sole qualified choice for 22V bus-level EOS hardening.
Availability
SC3BH4F is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT edge node power rails requiring stable component supply, full traceability, and long-term obsolescence management.
Supply support for SC3BH4F 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 connectivity - with leadership in transient suppression, RF, and signal integrity solutions.
SC3BH4F 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 stable clamping, wide temperature operation, and high surge endurance are critical.
FAQ
What is the exact package type and dimensions of SC3BH4F?
SC3BH4F uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no exposed thermal pad. Pins 1–3 are GND; pins 4–6 are IN. All six terminals are electrically active and must be fully connected to achieve rated 40A surge performance per Semtech's layout guidelines.
Does SC3BH4F meet IEC 61000-4-5 surge immunity standards?
Yes, SC3BH4F is rated for 40A peak pulse current with an 8/20μs waveform and complies with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω, CS = 0.5μF) for unsymmetrical lines. Its 27.5–28V clamping at 40A ensures protected circuits remain within safe operating limits during standardized surge testing.
How does SC3BH4F differ from standard TVS diodes in clamping behavior?
SC3BH4F uses a triggered FET shunt architecture, delivering near-constant 27.5–28V clamping across 24–40A and −40°C to +125°C. Standard TVS diodes exhibit linear VC = VBR + IPP × RDYN rise, causing clamping to increase with current and temperature - SC3BH4F avoids this drift entirely.
Can SC3BH4F be used on USB-C VBUS lines supporting 100W PD?
Yes, SC3BH4F is explicitly validated for USB Type-C VBUS protection in Semtech's application notes. Its 22V working voltage, ±30kV ESD rating, and stable 28V clamping at 40A make it ideal for safeguarding 20V PD controllers and load switches against connector-level surges and ESD events.
Is SC3BH4F pin-compatible with TDS2211P?
Yes, SC3BH4F is a direct marking variant of TDS2211P - identical die, identical DFN-6 pinout, identical electrical specifications, and identical qualification data per Semtech Rev 2.5 datasheet. No PCB or schematic changes are required when substituting SC3BH4F for TDS2211P.
SC3BH4F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 4-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):
- 3 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:
- -
SC3BH4F FAQ
1.How can I place an order for SC3BH4F through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3BH4F 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 SC3BH4F reliable?
The price and inventory of SC3BH4F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3BH4F is usually 5 days.
3.What payment methods are accepted for SC3BH4F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3BH4F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3BH4F?
SC3BH4F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3BH4F 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 SC3BH4F?
For technical support, including SC3BH4F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3BH4F requirements.
6.How does Aetrix verify that SC3BH4F is sourced from the original manufacturer or authorized distributors?
All SC3BH4F 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 SC3BH4F meets industry standards.
7.What is the process for return or replacement of SC3BH4F?
All SC3BH4F units undergo pre-shipment inspection (PSI). If there is an issue with SC3BH4F, 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 SC3BH4F part is unused and in its original packaging.
Return procedure for SC3BH4F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC3BH4F Tags
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