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Semtech Corporation SC402BMLTRT
- Part No.:
- SC402BMLTRT
- Manufacturer:
- Semtech Corporation
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 32-WFQFN Exposed Pad
- Datasheet:
-
SC402BMLTRT.pdf
- Description:
- IC REG DL BUCK/LNR SYNC 32MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:4,223
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Product details
Overview
SC402BMLTRT from Semtech is a Transient Diverting Suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and 20mΩ dynamic resistance - enabling robust USB Type-C PD bus protection in industrial and portable systems.
For engineers reviewing the SC402BMLTRT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 package layout guidance, functional role in load switch input protection, and validated alternative parts for 22V EOS suppression with stable clamping across temperature and current.
Technical Context
The SC402BMLTRT uses 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 (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It operates across –40°C to +125°C with <600nA reverse leakage at 22V, 175pF junction capacitance at 22V/1MHz, and is rated for 1120W peak pulse power. The device protects one unidirectional line with ground-referenced shunt architecture and requires all six pins connected for full 40A capability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches USB PD bus nominal voltage and withstand rating, enabling direct placement on VBus lines without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below typical 29–30V damage threshold of USB PD controllers across full surge range. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 (±1kV, RS=42Ω) for industrial equipment and USB PD applications. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity requirements without external staging. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting during transients, minimizing energy dissipation in protected ICs. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC power rails and low-speed control lines; not suitable for >100MHz signal paths. |
Pinout & Package
SC402BMLTRT is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad-less construction. All pins must be soldered for rated surge performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to minimize inductance and maximize 40A handling. |
| 4, 5, 6 | IN | Input terminal for protected line (e.g., USB PD VBus); parallel connection ensures uniform current sharing and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A - eliminates need for over-specifying IPP to meet voltage thresholds. |
| Temperature-stable clamping | Clamps at 27.5–28V from –40°C to +125°C - removes thermal derating calculations required for standard TVS diodes. |
| Low dynamic resistance | 20mΩ enables efficient shunting with minimal IR drop - preserves voltage margin for downstream load switches and controllers. |
| High-energy surge rating | 1120W peak pulse power supports repeated 40A surges per IEC 61000-4-5 - suitable for field-deployed industrial and IoT endpoints. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting 20–22V USB PD VBus lines against lightning-induced surges and connector hot-plug ESD. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VBus and GND, activated within nanoseconds of overvoltage detection. Use Value: Maintains clamping at ≤28V across temperature and full 40A surge range - prevents damage to USB PD controllers rated for ≤29V absolute maximum. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Primary EOS protection element diverting surge current away from the load switch's internal FET drain-source path. Use Value: Limits voltage across load switch input to <28V during ±1kV IEC 61000-4-5 events - avoids gate oxide stress and drain-source avalanche failure. |
| Notebook/Tablet DC Power Rail Protection | IoT Gateway Power Input Protection |
|
Use Scenario: Securing 19–22V DC input rails in thin-client notebooks and convertible tablets subject to user-handling ESD. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main system power rail, upstream of PMIC and battery charge management ICs. Use Value: Delivers ±30kV contact ESD immunity without adding series impedance - preserves power integrity and avoids voltage droop during transient events. |
Use Scenario: Hardening 22V auxiliary power inputs of cellular/NB-IoT gateways deployed in outdoor or factory-floor environments. IC Role / Device Role / Timing Role: First-line defense against induced surges from nearby AC mains switching or electrostatic discharge in uncontrolled settings. Use Value: Sustains 40A surge capability with <600nA leakage at 22V - ensures long-term reliability without standby power penalty or thermal drift. |
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, same DFN-6 package, identical marking and reel packaging - confirmed pin-to-pin and functionally identical replacement. | No change in PCB layout, BOM, or test procedures required - fully drop-in compatible for legacy designs using TDS2211P. | Select SC402BMLTRT when sourcing from Aetrix Electronics for traceable, volume-optimized supply with lifecycle coordination. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 30V clamping, smaller 0.65mm × 0.65mm DFN-2 package - not pin-compatible. | Suitable only for CC/SBU lines in USB Type-C; insufficient for 40A VBus protection - cannot replace SC402BMLTRT in power rail roles. | Use uClamp2411ZA only for low-capacitance, low-current auxiliary line protection where SC402BMLTRT's 40A rating is unnecessary. |
Compared with TDS2211P, SC402BMLTRT offers identical protection performance and mechanical fit, enabling seamless transition; versus uClamp2411ZA, it delivers 67% higher surge current capacity and 2–3V lower clamping - making it the sole viable option for 22V power rail EOS hardening.
Availability
SC402BMLTRT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch interfaces, and notebook/tablet power rail protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SC402BMLTRT 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 SC402BMLTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-voltage, high-energy EOS applications where stable clamping and temperature resilience are critical.
FAQ
What is the exact package type and dimensions of SC402BMLTRT?
SC402BMLTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no exposed thermal pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, and pins 4–6 are the IN terminal. This footprint matches JEDEC MO-229 and is identical to TDS2211P.
Does SC402BMLTRT require external bias or control signals to operate?
No, SC402BMLTRT is a fully autonomous transient suppressor. It contains an integrated trigger circuit and shunt FET - no external enable, bias, or configuration is needed. It activates automatically when input voltage exceeds ~25V breakdown, making SC402BMLTRT ideal for plug-and-play protection.
Can SC402BMLTRT protect bidirectional signal lines like USB DP/DM?
No, SC402BMLTRT is designed exclusively for unidirectional DC power or I/O line protection (GND-referenced). Its pinout and internal architecture do not support bidirectional clamping. For DP/DM lines, use low-capacitance TVS devices such as RClamp3371ZC - not SC402BMLTRT.
What is the maximum operating temperature range for SC402BMLTRT?
SC402BMLTRT is specified for continuous operation from –40°C to +125°C ambient. Its clamping voltage remains stable across this full range, and junction temperature is rated to +150°C - enabling reliable deployment in sealed industrial enclosures and automotive under-hood adjacent zones.
Is SC402BMLTRT compliant with RoHS and halogen-free standards?
Yes, SC402BMLTRT is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and WEEE. Its molding compound meets UL 94V-0 flammability rating, and lead finish is matte tin - consistent with Semtech's environmental compliance documentation for the TDS family.
SC402BMLTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- EcoSpeed®, SmartDrive™
- Package/Case:
- 32-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Topology:
- Step-Down (Buck) Synchronous (1), Linear (LDO) (1)
- Number of Outputs:
- 2
- Frequency - Switching:
- 1MHz
- Voltage/Current - Output 1:
- Adj to 0.6V, 10A
- Voltage/Current - Output 2:
- Adj to 0.75V, 200mA
- Voltage/Current - Output 3:
- -
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- Yes
- Voltage - Supply:
- 3V ~ 28V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 32-MLPQ (5x5)
SC402BMLTRT FAQ
1.How can I place an order for SC402BMLTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC402BMLTRT 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 SC402BMLTRT reliable?
The price and inventory of SC402BMLTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC402BMLTRT is usually 5 days.
3.What payment methods are accepted for SC402BMLTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC402BMLTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC402BMLTRT?
SC402BMLTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC402BMLTRT 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 SC402BMLTRT?
For technical support, including SC402BMLTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC402BMLTRT requirements.
6.How does Aetrix verify that SC402BMLTRT is sourced from the original manufacturer or authorized distributors?
All SC402BMLTRT 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 SC402BMLTRT meets industry standards.
7.What is the process for return or replacement of SC402BMLTRT?
All SC402BMLTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC402BMLTRT, 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 SC402BMLTRT part is unused and in its original packaging.
Return procedure for SC402BMLTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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