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Semtech Corporation SC3BH2
- Part No.:
- SC3BH2
- Manufacturer:
- Semtech Corporation
- Category:
- Bridge Rectifiers
- Package:
- 4-Rectangle
- Datasheet:
-
SC3BH2.pdf
- Description:
- BRIDGE RECT 3PHASE 200V 4A
- Quantity:
- Payment:
- Shipping:
Inventory:8,806
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Product details
Overview
SC3BH2 from Semtech is a Transient Diverting Suppressor (TDS) 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 24–40A, and 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.
For engineers reviewing the SC3BH2 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 EOS protection design-in.
Technical Context
The SC3BH2 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 a 22V reverse stand-off voltage and 25–27.9V breakdown voltage, delivering low 175pF junction capacitance and sub-600nA leakage at VRWM. The device requires all three input pins (4–6) and all three ground pins (1–3) connected in parallel to achieve rated 40A surge capability and minimize parasitic inductance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or conduction. |
| 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 during surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V bus systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements without degradation. |
| Dynamic Resistance | 20mΩ (8/20μs, 1–40A range) - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with USB Type-C VBus line protection without signal integrity impact. |
| Operating Temperature | −40°C to +125°C - supports deployment in extended-temperature industrial and automotive edge applications. |
Pinout & Package
SC3BH2 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. The package includes an exposed thermal pad (not electrically active) and laser-marked "T22" code with date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground terminals - must all be connected to low-inductance ground plane via multiple vias to sustain 40A surge current. |
| 4, 5, 6 | IN | Parallel-connected input terminals - connect directly to protected bus (e.g., USB PD VBus); all three required for full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across 24–40A and −40°C to +125°C - eliminates derating uncertainty vs. traditional TVS diodes. |
| FET-based shunt topology | Surge energy dissipated in low-RDS(on) channel instead of PN junction - enables higher IPP and improved thermal stability. |
| Low dynamic resistance | 20mΩ measured between 1A and 40A - reduces voltage overshoot during fast transients and improves system-level surge margin. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive burst noise in motor drives and industrial PLCs. |
| Space-optimized footprint | 1.6mm × 1.6mm DFN-6 - saves >50% board area versus SO-8 or SOT-23 TVS solutions rated for equivalent surge energy. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the 20–22V VBus line of USB Type-C connectors supporting Power Delivery up to 100W. IC Role / Device Role / Timing Role: Primary EOS suppressor placed at connector entry point to clamp lightning-induced surges and contact ESD before reaching PD controller and e-fuse. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents overvoltage damage to 24V-tolerant PD controllers without over-specifying IPP. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and IoT gateways exposed to field wiring surges. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage seen by the load switch's internal MOSFET drain, preventing avalanche failure during 1kV/42Ω surges. Use Value: Enables use of cost-optimized load switches by holding clamping below their absolute maximum drain-source voltage rating (e.g., <30V). |
| Industrial Equipment DC Power Rail Protection | Notebook/Tablet Main Power Input Protection |
|
Use Scenario: Securing 24V DC input rails in programmable logic controllers (PLCs), human-machine interfaces (HMIs), and factory automation sensors. IC Role / Device Role / Timing Role: Standalone transient suppressor on main power entry, coordinated with upstream fuses and downstream LDOs or DC-DC converters. Use Value: Delivers 40A surge handling and ±30kV ESD robustness while maintaining stable clamping - reduces need for redundant protection stages. |
Use Scenario: Protecting the battery charging or adapter input rail in thin-and-light notebooks and tablets where board space and thermal constraints are critical. IC Role / Device Role / Timing Role: Compact, low-capacitance EOS protector placed adjacent to power connector to intercept fast-rising ESD and coupled surges. Use Value: 175pF capacitance and 1.6mm² footprint enable integration without compromising PCB stack-up or thermal performance in ultra-thin form factors. |
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 ("T22") and tape/reel packaging (3,000 pcs/reel). Manufactured by Semtech as direct variant. | No functional difference - used interchangeably in USB PD and industrial designs per Semtech's ordering documentation. | Select TDS2211P.C when sourcing from authorized Semtech distribution channels requiring standard reel packaging and traceability. |
| SP1003-02HTG | TVS diode (not TDS architecture); 24V working voltage, 33.2V clamping at 10A, 120W peak power, SOD-323 package. Higher clamping, no current-dependent flat response. | Suitable only for lower-energy threats (<10A) or where board space allows larger standoff voltage margin; lacks temperature-stable clamping. | Choose SP1003-02HTG only if cost sensitivity outweighs clamping performance and thermal stability requirements. |
Compared with SC3BH2, TDS2211P.C offers identical protection performance and drop-in compatibility, while SP1003-02HTG provides lower-cost TVS-based protection at the expense of clamping voltage rise with current and temperature - making SC3BH2 preferable for 22V industrial and USB PD systems demanding consistent surge margin.
Availability
SC3BH2 is available at Aetrix Electronics and suitable for USB Type-C power delivery, industrial load switch inputs, and 22V DC power rail protection requiring stable component supply, long-term lifecycle support, and compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for SC3BH2 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, sensing, and connectivity.
SC3BH2 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 20–30V power and interface protection applications where flat clamping and temperature stability are critical.
FAQ
What is the exact package type and dimensions of SC3BH2?
SC3BH2 uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad (non-electrical). Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. The land pattern follows Semtech's recommended layout with multiple ground vias and straight trace routing to minimize inductance. This package is identical to that used for TDS2211P.C.
Does SC3BH2 require external bias or control signals to operate?
No, SC3BH2 is fully passive and self-triggering. It contains an integrated precision trigger circuit and surge-rated FET - no external voltage, enable pin, or configuration is needed. The device activates automatically when transient voltage exceeds its breakdown threshold (~25–27.9V), making SC3BH2 suitable for "fit-and-forget" protection in USB PD, industrial, and portable power rails.
How does SC3BH2's clamping voltage compare to standard TVS diodes at elevated temperature?
Unlike standard TVS diodes whose clamping voltage rises significantly with temperature and peak current, SC3BH2 maintains 27.5–28V clamping from −40°C to +125°C and across 24–40A. At 125°C, a typical 22V TVS may clamp above 38V at 24A, whereas SC3BH2 stays within 0.5V of its room-temperature value - ensuring predictable protection margin in thermally stressed environments.
Can SC3BH2 be used to protect high-speed data lines like USB SuperSpeed or PCIe?
No, SC3BH2 is not intended for high-speed signal lines. Its 175pF junction capacitance is optimized for power/bus protection (e.g., USB PD VBus), not data integrity. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF). SC3BH2 should only be applied to DC power or low-frequency control lines where capacitance is non-critical.
What is the maximum continuous DC voltage SC3BH2 can withstand without leakage or degradation?
SC3BH2 has a reverse stand-off voltage (VRWM) of 22V - meaning it reliably blocks up to 22V DC without significant leakage (≤600nA at 22V, 25°C). Operating continuously above 22V risks premature conduction and accelerated wear. It is rated for 22V nominal systems such as USB PD (20V max), industrial 24V rails (derated), and notebook adapter inputs.
SC3BH2 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):
- 200 V
- Current - Average Rectified (Io):
- 4 A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 3 A
- Current - Reverse Leakage @ Vr:
- 3 µA @ 200 V
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- QC Terminal
- Supplier Device Package:
- -
SC3BH2 FAQ
1.How can I place an order for SC3BH2 through Aetrix?
Please submit a Request for Quotation (RFQ) for SC3BH2 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 SC3BH2 reliable?
The price and inventory of SC3BH2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC3BH2 is usually 5 days.
3.What payment methods are accepted for SC3BH2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC3BH2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC3BH2?
SC3BH2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC3BH2 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 SC3BH2?
For technical support, including SC3BH2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC3BH2 requirements.
6.How does Aetrix verify that SC3BH2 is sourced from the original manufacturer or authorized distributors?
All SC3BH2 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 SC3BH2 meets industry standards.
7.What is the process for return or replacement of SC3BH2?
All SC3BH2 units undergo pre-shipment inspection (PSI). If there is an issue with SC3BH2, 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 SC3BH2 part is unused and in its original packaging.
Return procedure for SC3BH2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC3BH2 Tags
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