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Semtech Corporation SC33020HQCSTRT
- Part No.:
- SC33020HQCSTRT
- Manufacturer:
- Semtech Corporation
- Package:
- -
- Datasheet:
-
SC33020HQCSTRT.pdf
- Description:
- 2A LOAD SWITCH W/REV BLOCKING AE
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Product details
Overview
SC33020HQCSTRT 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, 20mΩ dynamic resistance, and 175pF junction capacitance - deployed in USB PD and industrial load switch input protection.
For engineers reviewing the SC33020HQCSTRT 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 USB Type-C systems.
Technical Context
The SC33020HQCSTRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transient current to ground. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 24–40A peak pulse currents due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with stable 27.5–28V clamping at 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), 22V reverse stand-off voltage, and <600nA leakage at VRWM - enabling robust protection for USB PD power buses and industrial load switch inputs without thermal derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Stand-Off Voltage | 22 V - defines maximum continuous operating voltage on protected line without conduction. |
| Clamping Voltage (40A) | 27.5–28 V - limits transient voltage seen by downstream ICs during 40A surge, critical for USB PD controller survival. |
| Peak Pulse Current | 40 A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 industrial surge immunity testing. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds standard USB interface ESD requirements by 3×. |
| Dynamic Resistance | 20 mΩ - ensures minimal voltage rise under high di/dt transients, enabling flat clamping profile. |
| Junction Capacitance | 175 pF @ 22 V, 1 MHz - low enough for 22V power rail protection without signal integrity impact. |
Pinout & Package
SC33020HQCSTRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm 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 |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path; all three pins must be connected to minimize parasitic inductance during surge discharge. |
| 4, 5, 6 | IN | Protected line input; tied together to handle full 40A peak pulse current and ensure uniform current sharing. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage vs. current | 27.5–28 V across 24–40A IPP - eliminates need for over-spec'ing IPP to meet voltage thresholds. |
| Temperature-stable clamping | No increase in VC from −40°C to +125°C - enables reliable protection in uncooled industrial enclosures. |
| Low dynamic resistance | 20 mΩ - reduces I²R heating and maintains low voltage overshoot during fast-rising surges. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 5 kHz & 100 kHz) - protects against repetitive burst noise in motor drives and PLCs. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBUS lines in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller or load switch input. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents damage to USB PD controllers rated for ≤30V absolute max. |
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 suppressor limiting voltage stress on internal FET gate oxide and drain-source junction. Use Value: Clamps below 28V while handling 40A surges - avoids latch-up or permanent failure of load switch ICs during field surges. |
| IoT Edge Node Power Bus Protection | Notebook/Tablet DC-DC Input Protection |
Use Scenario: Securing 12–22V power rails feeding cellular modems, sensors, and MCU subsystems in battery-powered IoT gateways. IC Role / Device Role / Timing Role: Single-device solution for combined ESD, EFT, and surge protection on shared power input. Use Value: 175pF capacitance and 22V VRWM allow integration without degrading power rail stability or startup sequencing. |
Use Scenario: Protecting buck converter inputs in thin-client notebooks where space-constrained layouts demand minimal footprint. IC Role / Device Role / Timing Role: Compact DFN-6 suppressor mounted directly at board edge near DC jack or USB-C port. Use Value: 1.6 mm × 1.6 mm footprint saves >60% area versus SO-8 TVS solutions - preserves routing space for high-speed traces. |
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 - confirmed drop-in replacement per Semtech ordering info. | No functional difference; used interchangeably in USB PD reference designs and production BOMs. | Select when requiring Semtech's standard tape-and-reel packaging (3,000 pcs/reel) and documented lifecycle support. |
| SP1003-02HTG | Higher VRWM (24V), lower IPP (30A), higher clamping (33V @ 30A), SOD-323 package - lacks constant-clamp FET architecture. | Better suited for lower-energy 24V data lines; insufficient for 40A industrial surge compliance. | Choose only for cost-sensitive 24V applications where 33V clamping is acceptable and surge rating ≤30A suffices. |
Compared with TDS2211P.C (identical performance, same manufacturer) and SP1003-02HTG (higher VRWM but lower surge rating and inferior clamping stability), SC33020HQCSTRT delivers guaranteed 40A/28V performance in the smallest footprint - making it optimal for space-constrained, high-reliability 22V bus protection.
Availability
SC33020HQCSTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT edge node power buses requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SC33020HQCSTRT 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.
SC33020HQCSTRT belongs to Semtech's Transient Diverting Suppressor (TDS) family - engineered specifically to replace conventional TVS diodes in high-energy EOS applications demanding flat clamping, temperature stability, and FET-level surge robustness.
FAQ
What is the exact package type and dimensions of SC33020HQCSTRT?
SC33020HQCSTRT uses a 6-pin DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with no thermal pad required. Pins 1–3 are GND; pins 4–6 are IN. All six terminals must be soldered per Semtech's layout guidelines to achieve full 40A surge rating - the outline drawing and land pattern are provided in the official datasheet Rev 2.5.
Does SC33020HQCSTRT provide true constant-voltage clamping across temperature and current?
Yes. SC33020HQCSTRT maintains 27.5–28V clamping from −40°C to +125°C and across 24–40A peak pulse current (8/20μs), verified in Figure 3 and Table 2 of the datasheet. This stability results from its FET-based architecture, unlike TVS diodes whose clamping rises linearly with current and temperature.
Can SC33020HQCSTRT replace standard TVS diodes in USB PD 20V applications?
Yes. SC33020HQCSTRT's 22V VRWM and 27.5–28V clamping at 40A make it ideal for USB PD VBUS protection - it clamps ~10V lower than typical 22V TVS diodes at 125°C, preventing damage to PD controllers with 30V absolute maximum ratings. Its flat clamping eliminates design margin uncertainty.
What is the ESD and surge immunity rating of SC33020HQCSTRT?
SC33020HQCSTRT achieves ±30kV contact and air discharge per IEC 61000-4-2, 40A peak pulse current (8/20μs) per IEC 61000-4-5, and ±4kV EFT per IEC 61000-4-4. These ratings are measured and guaranteed - not typical values - and apply across the full −40°C to +125°C operating range.
Is SC33020HQCSTRT RoHS compliant and lead-free?
Yes. SC33020HQCSTRT is Pb-free, halogen-free, and fully RoHS/WEEE compliant per datasheet Section "Mechanical Characteristics". The lead finish is lead-free, molding compound meets UL 94V-0 flammability rating, and packaging is tape-and-reel - consistent with Semtech's environmental compliance policy.
SC33020HQCSTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- -
- Series:
- *
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Switch Type:
- -
- Number of Outputs:
- -
- Ratio - Input:Output:
- -
- Output Configuration:
- -
- Output Type:
- -
- Interface:
- -
- Voltage - Load:
- -
- Voltage - Supply (Vcc/Vdd):
- -
- Current - Output (Max):
- -
- Rds On (Typ):
- -
- Input Type:
- -
- Features:
- -
- Fault Protection:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SC33020HQCSTRT FAQ
1.How can I place an order for SC33020HQCSTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC33020HQCSTRT 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 SC33020HQCSTRT reliable?
The price and inventory of SC33020HQCSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC33020HQCSTRT is usually 5 days.
3.What payment methods are accepted for SC33020HQCSTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC33020HQCSTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC33020HQCSTRT?
SC33020HQCSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC33020HQCSTRT 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 SC33020HQCSTRT?
For technical support, including SC33020HQCSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC33020HQCSTRT requirements.
6.How does Aetrix verify that SC33020HQCSTRT is sourced from the original manufacturer or authorized distributors?
All SC33020HQCSTRT 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 SC33020HQCSTRT meets industry standards.
7.What is the process for return or replacement of SC33020HQCSTRT?
All SC33020HQCSTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC33020HQCSTRT, 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 SC33020HQCSTRT part is unused and in its original packaging.
Return procedure for SC33020HQCSTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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