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Semtech Corporation SC33001ACSTRT
- Part No.:
- SC33001ACSTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 6-WFBGA, CSPBGA
- Datasheet:
-
SC33001ACSTRT.pdf
- Description:
- IC PWR SWITCH N-CHAN 1:1 6CSP
- Quantity:
- Payment:
- Shipping:
Inventory:3,205
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Product details
Overview
SC33001ACSTRT 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 a stable 27.5–28V clamping voltage across temperature and current range. It protects USB Type-C power delivery buses, load switch inputs, and industrial interfaces where low, temperature-invariant clamping is critical.
For engineers reviewing the SC33001ACSTRT datasheet, pinout, applications, or equivalent options, this page provides verified electrical specifications, DFN-6 package layout guidance, functional role in surge diversion architecture, and validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
The SC33001ACSTRT uses a precision-triggered shunt FET as its primary protection element-not a conventional TVS diode-enabling near-constant clamping voltage over 24–40A peak pulse current and −40°C to +125°C operating temperature. Its dynamic resistance is 20mΩ, and junction capacitance is 175pF at 22V/1MHz.
Unlike standard TVS devices whose clamping voltage rises linearly with current and temperature (VC = VBR + IPP × RDYN), the SC33001ACSTRT maintains ~27.5V clamping regardless of surge magnitude or ambient conditions due to the FET's collapsing RDS(on) under transient stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus voltage and avoids false triggering during normal operation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 29V damage threshold of common 30V-rated load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards without derating. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough to avoid signal integrity degradation on 20V power rails, but not suitable for high-speed data lines. |
| Dynamic Resistance | 20mΩ - enables minimal voltage rise under surge, ensuring predictable energy dissipation and thermal stability. |
Pinout & Package
SC33001ACSTRT 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 |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS or load switch VIN); parallel connection ensures uniform current distribution and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS diodes with a triggered shunt FET, enabling flat clamping response independent of surge amplitude or temperature. |
| Stable clamping over temperature | Clamping voltage remains 27.5–28V from −40°C to +125°C - eliminates thermal derating calculations required for standard TVS devices. |
| High-energy surge handling | 1120W peak pulse power (8/20μs) supports repeated lightning-surge events without parametric shift or degradation. |
| Low dynamic resistance | 20mΩ RDYN minimizes IR drop during surge, reducing localized heating and improving reliability in high-repetition applications. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the VBUS line in USB Type-C connectors supporting up to 20V/5A PD negotiation, exposed to ESD and system-level surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed adjacent to the connector, diverting transients before they reach the PD controller or buck converter. Use Value: Maintains 27.5V clamping at 40A and 125°C - well below the 30V absolute maximum rating of common PD controllers like TUSB73x or STUSB4500. |
Use Scenario: Safeguarding the input of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation systems subject to 1kV/42Ω surges. IC Role / Device Role / Timing Role: Front-end transient suppressor that limits voltage seen by the load switch's internal MOSFET gate oxide and drain-source junction. Use Value: Prevents gate oxide breakdown and avalanche failure by clamping to ≤28V - within safe operating area of 30V-rated load switches even at elevated ambient temperatures. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT gateways and edge AI nodes deployed in uncontrolled environments. IC Role / Device Role / Timing Role: Single-component solution for combined ESD, EFT, and surge protection on non-isolated DC inputs, eliminating multi-stage TVS+MOV designs. Use Value: Delivers ±4kV EFT immunity (IEC 61000-4-4) and 40A surge capability in 1.6mm² footprint - enabling compact, certified Class B industrial designs. |
Use Scenario: Protecting 22V backup supplies in NVMe SSD enclosures and enterprise storage controllers against hot-plug transients and board-level coupling. IC Role / Device Role / Timing Role: Fast-acting shunt clamp placed between backup rail and system ground, activated within nanoseconds of overvoltage detection. Use Value: Limits transient overshoot to <28V during 1.2/50μs combination wave events - preserving data integrity and preventing controller latch-up during unexpected power sequencing. |
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, and identical marking code "T22"; differs only in tape-and-reel packaging (3,000 pcs/reel vs. SC33001ACSTRT's unspecified reel quantity). | No functional difference; used interchangeably in production where packaging logistics allow. | Select TDS2211P.C when standard Semtech reel configuration is preferred; SC33001ACSTRT may reflect custom order or alternate branding. |
| uClamp2411ZA | 24V working voltage, lower 24A peak pulse rating, higher 33V clamping voltage, and smaller 1.0mm × 0.6mm SOD-323 package. | Suitable for CC/SBU lines in USB-C, not for 22V VBUS; lacks thermal and current-handling headroom for load switch protection. | Choose uClamp2411ZA only for low-capacitance, space-constrained auxiliary signal lines - not as a direct replacement for SC33001ACSTRT on power rails. |
Compared with TDS2211P.C, SC33001ACSTRT offers identical protection performance but may differ in reel logistics; versus uClamp2411ZA, SC33001ACSTRT provides 67% higher surge current rating and 5.5V lower clamping - making it the sole viable option for 22V power rail hardening in industrial USB PD and load switch applications.
Availability
SC33001ACSTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and guaranteed surge immunity compliance.
Supply support for SC33001ACSTRT 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 SC33001ACSTRT 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 mandatory.
FAQ
What is the exact package type and dimensions of SC33001ACSTRT?
SC33001ACSTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no thermal pad. Pins 1–3 are GND; pins 4–6 are IN. The land pattern requires full copper connection to ground plane via multiple vias, and placement must be adjacent to the protected connector per Semtech's layout guidelines for SC33001ACSTRT.
Does SC33001ACSTRT meet IEC 61000-4-5 surge immunity standards?
Yes, SC33001ACSTRT is rated for 40A peak pulse current with 8/20μs waveform and ±1kV (1.2/50μs, RS = 42Ω) for unsymmetrical lines - satisfying IEC 61000-4-5 Level 4 requirements. Its 27.5–28V clamping voltage ensures downstream components remain within safe operating limits during standardized surge testing of SC33001ACSTRT.
How does SC33001ACSTRT differ from standard TVS diodes in clamping behavior?
Unlike TVS diodes whose clamping voltage increases linearly with current (VC = VBR + IPP × RDYN), SC33001ACSTRT uses a triggered shunt FET that achieves near-constant 27.5–28V clamping from 1A to 40A and across −40°C to +125°C. This eliminates thermal derating and ensures predictable protection margins for SC33001ACSTRT in real-world operating conditions.
Can SC33001ACSTRT be used on high-speed data lines like USB SuperSpeed or PCIe?
No. SC33001ACSTRT has 175pF junction capacitance at 22V - too high for differential high-speed signals. It is intended exclusively for 22V power or low-frequency I/O lines. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), not SC33001ACSTRT.
Is SC33001ACSTRT RoHS and halogen-free compliant?
Yes, SC33001ACSTRT is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and lead finish is lead-free - confirmed in the official Semtech datasheet for SC33001ACSTRT.
SC33001ACSTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 6-WFBGA, CSPBGA
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 0V ~ 5.5V
- Voltage - Supply (Vcc/Vdd):
- 1.7V ~ 5.5V
- Current - Output (Max):
- 3A
- Rds On (Typ):
- 9mOhm
- Input Type:
- Non-Inverting
- Features:
- Load Discharge, Slew Rate Controlled
- Fault Protection:
- Over Current, Over Temperature, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 6-CSP (0.9x1.4)
SC33001ACSTRT FAQ
1.How can I place an order for SC33001ACSTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC33001ACSTRT 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 SC33001ACSTRT reliable?
The price and inventory of SC33001ACSTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC33001ACSTRT is usually 5 days.
3.What payment methods are accepted for SC33001ACSTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC33001ACSTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC33001ACSTRT?
SC33001ACSTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC33001ACSTRT 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 SC33001ACSTRT?
For technical support, including SC33001ACSTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC33001ACSTRT requirements.
6.How does Aetrix verify that SC33001ACSTRT is sourced from the original manufacturer or authorized distributors?
All SC33001ACSTRT 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 SC33001ACSTRT meets industry standards.
7.What is the process for return or replacement of SC33001ACSTRT?
All SC33001ACSTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC33001ACSTRT, 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 SC33001ACSTRT part is unused and in its original packaging.
Return procedure for SC33001ACSTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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