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Semtech Corporation SC4211HSTRT
- Part No.:
- SC4211HSTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Datasheet:
-
SC4211HSTRT.pdf
- Description:
- IC REG LIN POS ADJ 1A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,098
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Product details
Overview
SC4211HSTRT 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 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 SC4211HSTRT 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 design.
Technical Context
The SC4211HSTRT 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 0–40A and −40°C to +125°C due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage (VRWM) of 22V, breakdown voltage (VBR) of 25–27.9V, and junction capacitance of 175pF at 22V/1MHz - enabling robust protection without signal integrity compromise in high-speed power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V reverse stand-off voltage - matches USB PD 20V nominal + margin, preventing false triggering during normal operation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of common 30V-rated load switches and PD controllers. |
| Peak Pulse Current | 40A per IEC 61000-4-5 - satisfies industrial surge immunity requirements including ±1kV (1.2/50μs, 42Ω source). |
| ESD Withstand | ±30kV contact & air per IEC 61000-4-2 - exceeds Level 4 immunity for external connectors in consumer and industrial devices. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting, minimizing power dissipation and thermal stress during multi-pulse events. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough to avoid degrading rise/fall times on 20V power rails while supporting fast transient response. |
Pinout & Package
SC4211HSTRT is housed in a RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed pad-less construction and UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path - all three must be connected to maximize surge current handling and minimize parasitic inductance. |
| Pins 4, 5, 6 | IN | Protected line input - tied together to form a single low-inductance connection point for VBUS or power rail protection. |
Key Features
| Feature | Design Value |
|---|---|
| Constant Clamping Across Current Range | Clamping voltage varies only 0.5V from 24A to 40A - eliminates need for over-spec'ing IPP to meet voltage safety margins. |
| Temperature-Stable Protection | Clamping remains stable from −40°C to +125°C - ensures consistent protection in automotive cabins, industrial enclosures, and outdoor IoT deployments. |
| FET-Based Shunt Architecture | Replaces traditional TVS junctions with low-RDS(on) MOSFET - reduces thermal runaway risk and improves multi-pulse reliability. |
| Low Leakage | ≤600nA at 22V - avoids system-level quiescent current penalties in battery-powered USB-C accessories and remote sensors. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting 20V USB PD VBUS lines against lightning-induced surges and connector hot-plug ESD in docking stations and power adapters. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed directly at the Type-C receptacle, clamping transients before they reach the PD controller and DC-DC converter. Use Value: Maintains 27.5–28V clamping across full temperature range - prevents overvoltage damage to 30V-rated PD ICs without derating at high ambient temperatures. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in programmable logic controllers and smart meters. IC Role / Device Role / Timing Role: Front-end transient guard for load switch VIN/EN terminals, absorbing 40A surges while limiting voltage to <30V. Use Value: Prevents gate oxide rupture and internal FET failure in load switches during 1kV/42Ω surge events - extends field reliability in harsh industrial environments. |
| IoT Device Power Rail Protection | Notebook/Tablet Main Power Input Protection |
Use Scenario: Securing 12–24V input rails of cellular-connected edge sensors exposed to electrostatic discharge during field servicing or cable insertion. IC Role / Device Role / Timing Role: Single-component solution for EOS suppression on main power entry, replacing multi-device TVS+capacitor networks. Use Value: 1.6mm × 1.6mm footprint saves >60% board area versus SOD-123 TVS solutions - critical for compact PCBs in battery-powered gateways. |
Use Scenario: Protecting 20V input stages of notebook motherboard power delivery circuits from accidental AC adapter misconnection or ESD coupling. IC Role / Device Role / Timing Role: First-line defense on DC jack or USB-C port input, diverting energy away from buck converters and battery charge management ICs. Use Value: 175pF capacitance avoids resonance with typical 10–47μF input bulk caps - preserves stability of downstream switching regulators. |
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 factory variant with tape-and-reel packaging. | No functional difference; used interchangeably in production builds requiring certified reel quantities. | Select TDS2211P.C when sourcing full reels (3,000 pcs) for automated assembly - identical performance, same qualification status. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, 0.25pF capacitance - optimized for CC/SBU data lines, not power rails. | Designed for low-capacitance signal line protection; unsuitable for VBUS due to insufficient surge rating and higher clamping (~33V at 20A). | Choose uClamp2411ZA only for auxiliary USB-C lines (CC, SBU); SC4211HSTRT remains required for VBUS/power rail protection. |
Compared with TDS2211P.C, SC4211HSTRT shares identical protection characteristics but may differ in traceability or reel labeling; compared with uClamp2411ZA, SC4211HSTRT delivers 2× peak current capability and 5V lower clamping - making it the sole suitable option for 22V power rail EOS hardening.
Availability
SC4211HSTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT device power input stages requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SC4211HSTRT 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.
The SC4211HSTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-voltage, high-energy EOS protection applications where stable clamping and temperature resilience are critical.
FAQ
What is the maximum operating temperature range for SC4211HSTRT?
The SC4211HSTRT is rated for continuous operation from −40°C to +125°C. Its clamping voltage remains stable across this full range, with no degradation in peak pulse current capability - confirmed by characterization data up to 125°C in the official datasheet. This makes SC4211HSTRT suitable for under-hood automotive modules and sealed industrial enclosures where thermal management is limited.
Does SC4211HSTRT require a thermal pad on the PCB?
No, SC4211HSTRT does not require a thermal pad. The device dissipates surge energy primarily through conduction rather than junction heating, and its DFN-6 package is designed without an exposed thermal pad. Layout guidelines specify connecting all GND pins (1–3) and IN pins (4–6) with short, wide traces and multiple vias to ground - not a copper pour - to minimize inductance and maximize surge current handling.
How does SC4211HSTRT compare to standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SC4211HSTRT maintains near-constant clamping (27.5–28V) from 1A to 40A due to its FET-based architecture. This eliminates the need to overspecify IPP just to meet voltage safety limits - a key advantage for protecting 30V-rated ICs in USB PD and industrial power systems.
Can SC4211HSTRT be used on USB SuperSpeed differential pairs?
No, SC4211HSTRT is not intended for USB SuperSpeed (TX/RX) lines. Its 175pF capacitance would severely degrade signal integrity at 10Gbps. For those lines, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF). SC4211HSTRT is specifically designed for VBUS, CC, and power rail protection - not high-speed data paths.
Is SC4211HSTRT compatible with lead-free reflow soldering processes?
Yes, SC4211HSTRT is fully compatible with standard lead-free reflow profiles, including JEDEC J-STD-020-compliant peak temperatures up to 260°C. Its Pb-free, halogen-free construction and UL 94V-0 molding compound meet IPC-A-610 Class 2 and Class 3 assembly requirements. No special prebake or moisture sensitivity handling is required.
SC4211HSTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Output Configuration:
- Positive
- Output Type:
- Adjustable (Fixed)
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 0.5V
- Voltage - Output (Max):
- 5.5V
- Voltage Dropout (Max):
- 0.5V @ 1A
- Current - Output:
- 1A
- Current - Quiescent (Iq):
- 50 µA
- Current - Supply (Max):
- 3 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC, EDP
SC4211HSTRT FAQ
1.How can I place an order for SC4211HSTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC4211HSTRT 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 SC4211HSTRT reliable?
The price and inventory of SC4211HSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC4211HSTRT is usually 5 days.
3.What payment methods are accepted for SC4211HSTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC4211HSTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC4211HSTRT?
SC4211HSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC4211HSTRT 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 SC4211HSTRT?
For technical support, including SC4211HSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC4211HSTRT requirements.
6.How does Aetrix verify that SC4211HSTRT is sourced from the original manufacturer or authorized distributors?
All SC4211HSTRT 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 SC4211HSTRT meets industry standards.
7.What is the process for return or replacement of SC4211HSTRT?
All SC4211HSTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC4211HSTRT, 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 SC4211HSTRT part is unused and in its original packaging.
Return procedure for SC4211HSTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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