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Semtech Corporation SC33020HCSTRT
- Part No.:
- SC33020HCSTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 4-UFBGA, CSPBGA
- Datasheet:
-
SC33020HCSTRT.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 4CSP
- Quantity:
- Payment:
- Shipping:
Inventory:2,449
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Product details
Overview
SC33020HCSTRT 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), and stable 27.5–28V clamping across temperature and current range. Used in USB Type-C PD input protection to safeguard controllers from voltage overshoot.
For engineers reviewing the SC33020HCSTRT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 package layout guidance, functional role in load-switch and bus protection, and validated alternative parts with documented differences.
Technical Context
The SC33020HCSTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under surge conditions - not fixed dynamic resistance.
It operates over –40°C to +125°C, maintains ≤600nA reverse leakage at 22V, and exhibits only 20mΩ dynamic resistance (8/20μs). Its 175pF junction capacitance at 22V/1MHz supports low-speed power-line and control-line protection without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage it can protect without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures protected ICs (e.g., USB PD controllers) remain below damage thresholds during worst-case surges. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds handheld ESD event severity, enabling robust front-end protection. |
| Junction Capacitance | 175pF at 22V/1MHz - suitable for power rails and low-speed control lines; avoids signal distortion on data paths. |
| Dynamic Resistance | 20mΩ (8/20μs) - enables flat clamping behavior and minimizes voltage rise under increasing surge current. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - ultra-compact footprint saves PCB area vs. SOT-23 or SOIC alternatives. |
Pinout & Package
SC33020HCSTRT is housed in a Pb-free, RoHS-compliant 6-pin DFN package (1.6mm × 1.6mm × 0.55mm) with exposed thermal pad not required - energy dissipation occurs within the FET structure. All pins must be connected 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 must be soldered to maximize current sharing and minimize inductance. |
| Pins 4, 5, 6 | IN | Protected line input - connects directly to VBus, load switch input, or power rail; parallel connection improves surge handling. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 1A to 40A surge - eliminates design margin inflation needed with TVS diodes. |
| Temperature-stable protection | Clamping voltage variation <0.5V across –40°C to +125°C - enables reliable operation in industrial and automotive ambient conditions. |
| FET-based shunt topology | Surge energy diverted through low-RDS(on) channel instead of PN-junction - reduces thermal stress and extends lifetime vs. standard TVS. |
| Low dynamic resistance | 20mΩ measured between 1A–40A - ensures minimal IR drop during surge, preserving clamping accuracy under high-current transients. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 5kHz & 100kHz) - protects against repetitive fast bursts common in motor drives and switching power supplies. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C receptacles supporting up to 20V PD negotiation. IC Role / Device Role / Timing Role: Primary EOS suppressor placed between connector and PD controller or load switch input. Use Value: Maintains clamping at ≤28V across temperature and current - prevents controller latch-up or gate oxide damage during ±1kV surge events. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters and robotics. IC Role / Device Role / Timing Role: Front-end transient shunt that limits voltage seen by internal FET gate and drain terminals. Use Value: Keeps clamping below 30V - avoids overvoltage failure of integrated MOSFETs while sustaining 40A surge capability. |
| IoT Edge Node Power Rail Protection | Notebook/Tablet Battery Charging Circuit Protection |
Use Scenario: Securing 12–22V input rails in battery-powered IoT gateways exposed to ESD during field servicing. IC Role / Device Role / Timing Role: Single-device solution for both ESD and surge suppression on main power entry point. Use Value: Delivers ±30kV ESD and 40A surge protection in 1.6mm² footprint - eliminates need for cascaded TVS+MOV designs. |
Use Scenario: Protecting charging IC inputs in thin-client devices where board space and thermal constraints limit discrete solutions. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) protector on battery-side input of buck-boost chargers. Use Value: Prevents false OVP triggering and ensures charger IC reliability without adding signal-path capacitance or standby current penalty. |
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-manufactured variant with same production lot traceability. | No functional difference; used interchangeably in USB-C and industrial designs per Semtech documentation. | Select when requiring official Semtech-recommended part number with full compliance documentation and long-term availability assurance. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, 0.25pF capacitance - optimized for CC/SBU lines, not power rails. | Designed for low-capacitance data-line protection; unsuitable for 22V bus clamping due to lower surge rating and higher clamping (~32V). | Choose only for auxiliary signal lines; not a functional replacement for SC33020HCSTRT in power-rail roles. |
Compared with SC33020HCSTRT, TDS2211P.C offers identical performance and sourcing continuity, while uClamp2411ZA serves a different signal-integrity-critical function and cannot replace SC33020HCSTRT in high-current power-line protection.
Availability
SC33020HCSTRT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for SC33020HCSTRT 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.
The SC33020HCSTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power-rail protection applications demanding flat clamping and temperature stability.
FAQ
What is the exact clamping voltage of SC33020HCSTRT at 40A surge current?
The SC33020HCSTRT clamps at 27.6–28V under 40A peak pulse current (tp = 1.2/50μs voltage + 8/20μs current combination waveform, RS = 2Ω), as specified in its Electrical Characteristics table. This value is guaranteed across –40°C to +125°C and reflects its FET-based constant-clamp architecture - not a typical TVS diode's linear VC = VBR + IPP×RDYN relationship.
Is SC33020HCSTRT pin-compatible with standard TVS diodes in SOT-23 packages?
No, SC33020HCSTRT uses a 6-pin DFN package (1.6mm × 1.6mm) with three GND pins (1,2,3) and three IN pins (4,5,6); it is not pin-compatible with any 3-pin SOT-23 TVS diode. Layout requires dedicated land pattern per Semtech's outline drawing - no PCB redesign can make it a drop-in replacement for SOT-23 parts.
Can SC33020HCSTRT be used to protect high-speed data lines like USB SuperSpeed or PCIe?
No, SC33020HCSTRT is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V would severely degrade signal integrity on >100MHz interfaces. It is explicitly intended for power rails and low-speed control lines - Semtech recommends RClamp3371ZC (<0.25pF) for USB SS/DP/DM lines alongside SC33020HCSTRT in full Type-C protection schemes.
Does SC33020HCSTRT require a thermal pad or heatsink for 40A surge handling?
No, SC33020HCSTRT does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy differently than junction-limited TVS diodes, and Semtech's datasheet explicitly states "no thermal pad is needed" - the 0.55mm package height and DFN construction are sufficient for transient energy absorption without sustained thermal buildup.
What is the maximum operating temperature range for SC33020HCSTRT?
The SC33020HCSTRT is rated for continuous operation from –40°C to +125°C ambient temperature. Its clamping voltage remains stable across this full range (±0.5V variation), and its junction temperature can reach +150°C during transient events - making it suitable for under-hood automotive modules, industrial PLCs, and thermally constrained portable electronics.
SC33020HCSTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 4-UFBGA, CSPBGA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Switch Type:
- General Purpose
- Number of Outputs:
- 1
- Ratio - Input:Output:
- 1:1
- Output Configuration:
- High Side
- Output Type:
- N-Channel
- Interface:
- On/Off
- Voltage - Load:
- 1.65V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- Not Required
- Current - Output (Max):
- 2A
- Rds On (Typ):
- 25mOhm
- Input Type:
- -
- Features:
- Slew Rate Controlled
- Fault Protection:
- Reverse Current
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-CSP (0.90x0.90)
SC33020HCSTRT FAQ
1.How can I place an order for SC33020HCSTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC33020HCSTRT 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 SC33020HCSTRT reliable?
The price and inventory of SC33020HCSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC33020HCSTRT is usually 5 days.
3.What payment methods are accepted for SC33020HCSTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC33020HCSTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC33020HCSTRT?
SC33020HCSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC33020HCSTRT 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 SC33020HCSTRT?
For technical support, including SC33020HCSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC33020HCSTRT requirements.
6.How does Aetrix verify that SC33020HCSTRT is sourced from the original manufacturer or authorized distributors?
All SC33020HCSTRT 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 SC33020HCSTRT meets industry standards.
7.What is the process for return or replacement of SC33020HCSTRT?
All SC33020HCSTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC33020HCSTRT, 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 SC33020HCSTRT part is unused and in its original packaging.
Return procedure for SC33020HCSTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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