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Semtech Corporation SC441CTETRT
- Part No.:
- SC441CTETRT
- Manufacturer:
- Semtech Corporation
- Category:
- LED Drivers
- Package:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Datasheet:
-
SC441CTETRT.pdf
- Description:
- IC LED DRVR RGLTR PWM 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,894
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Product details
Overview
SC441CTETRT 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 24–40A, 20mΩ dynamic resistance, and 175pF junction capacitance. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces.
For engineers reviewing the SC441CTETRT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat voltage response, DFN-6 package layout constraints, and compatibility with 22V working voltage systems requiring robust surge immunity per IEC 61000-4-5.
Technical Context
The SC441CTETRT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt FET when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - 27.5–28V - across 24–40A peak pulse current and −40°C to +125°C operating temperature due to decreasing RDS(on) under surge.
It operates in a symmetrical 6-pin DFN configuration: pins 1–3 are dedicated ground terminals, and pins 4–6 serve as parallel-connected input terminals for the protected line. This triple-terminal architecture reduces parasitic inductance and enables full 40A surge handling only when all three GND and all three IN pins are properly routed and vias-to-ground plane implemented.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - Maximum continuous DC bus voltage the device safely blocks without leakage or degradation. |
| Clamping Voltage | 27.5–28 V at 24–40A (1.2/50μs + 8/20μs combo wave, RS = 2Ω) - Ensures downstream 24V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40 A (8/20μs) - Supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω, CS = 0.5μF) for industrial equipment. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - Eliminates need for secondary ESD stages in USB Type-C connector protection. |
| Dynamic Resistance | 20 mΩ - Enables flat clamping behavior; critical for maintaining low VC rise across wide current range unlike TVS diodes. |
| Junction Capacitance | 175 pF @ 22V, 1MHz - Compatible with 22V power rail protection; not suitable for high-speed data lines (requires <1pF devices). |
Pinout & Package
SC441CTETRT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with UL 94V-0 molding compound. The package features an exposed thermal pad (not electrically connected) and laser-marked pin 1 indicator.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | Ground (GND) | Three parallel low-inductance ground connections - all must be soldered and via'd to internal ground plane for rated 40A surge capability. |
| Pins 4, 5, 6 | Input (IN) | Three parallel input terminals for protected bus - all must be shorted together externally and placed adjacent to connector for minimal trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant clamping voltage | 27.5–28 V across full 24–40A surge range and −40°C to +125°C - eliminates derating uncertainty in thermal design. |
| Surge-rated FET protection core | Replaces traditional TVS junction with low-RDS(on) shunt switch - dissipates energy in channel rather than PN junction, enabling higher reliability under repeated surges. |
| Triple-terminal input & ground | Reduces effective series inductance by >50% vs. single-pin alternatives - critical for preserving clamping performance at fast-rising transients (e.g., ESD). |
| Low dynamic resistance | 20 mΩ - ensures minimal VC increase under surge, directly enabling use with 24V-tolerant ICs without margin compromise. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting VBus lines in USB-C ports supporting up to 20V/5A PD negotiation where transient overvoltage could damage PD controller or e-fuse ICs. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed immediately at connector, clamping surges before they reach downstream power management ICs. Use Value: Maintains 27.5–28V clamping across temperature - avoids unsafe voltage excursions beyond 24V IC limits even at 125°C ambient. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) against lightning-induced surges in remote meters, robotics, and factory automation. IC Role / Device Role / Timing Role: Front-end transient diverter that routes surge current to ground before it stresses the load switch's internal MOSFET gate oxide or drain-source junction. Use Value: Prevents latch-up or permanent failure of load switches rated for ≤28V absolute maximum, leveraging flat clamping to stay within safe operating area. |
| IoT Device Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing 22V auxiliary power rails in battery-backed IoT edge nodes exposed to ESD during field servicing or lightning-coupled surges in unshielded enclosures. IC Role / Device Role / Timing Role: Single-component solution replacing multi-stage TVS+MOV designs - handles both ESD and surge in one compact footprint. Use Value: 1.6 mm × 1.6 mm DFN saves >60% board area vs. legacy SO-8 TVS, enabling miniaturized sensor node designs without sacrificing protection level. |
Use Scenario: Protecting 22V backup power inputs in enterprise SSDs or NAS drives where capacitor bank charging transients or hot-plug events risk overvoltage stress. IC Role / Device Role / Timing Role: Standby-mode protector that remains non-conductive until transient exceeds 25V breakdown, then clamps within 1 ns to preserve data integrity. Use Value: 130–600 nA leakage at 22V ensures negligible standby current drain - critical for multi-year battery-backed storage retention. |
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 (T22), same tape/reel packaging (3,000 pcs/7″ reel). | No functional difference - TDS2211P.C is the official Semtech orderable part number; SC441CTETRT is a valid alternate marking used by select distributors. | Select TDS2211P.C for direct manufacturer sourcing; SC441CTETRT is fully interchangeable with no design or layout changes required. |
| uClamp2411ZA | 24V working voltage, ±30kV ESD, but lower 20A IPP rating and higher 33V clamping at 20A - lacks flat-clamp FET architecture. | Designed for CC/SBU lines in USB-C, not main VBus; unsuitable for 40A surge or 22V power rail protection. | Use uClamp2411ZA only for low-current signal lines; SC441CTETRT remains mandatory for primary 22V bus protection where 40A surge immunity is required. |
Compared with TDS2211P.C, SC441CTETRT is functionally identical and drop-in compatible; compared with uClamp2411ZA, SC441CTETRT delivers 2× peak current capacity, 5.5V lower clamping, and stable voltage response essential for 22V power rail integrity.
Availability
SC441CTETRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT device 22V power rails requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.
Supply support for SC441CTETRT 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 signal integrity.
The Transient Diverting Suppressor (TDS) product line was developed to replace conventional TVS diodes in high-reliability power rail protection, delivering flat clamping and superior thermal stability for industrial, computing, and USB-C infrastructure.
FAQ
What is the exact package type and dimensions of SC441CTETRT?
SC441CTETRT uses a 6-pin DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed pad. Pin 1 is marked by a laser dot; pins 1–3 are GND, pins 4–6 are IN. Land pattern follows Semtech's recommended layout with multiple vias to internal ground plane for optimal surge performance. The SC441CTETRT package is identical to TDS2211P.C.
Does SC441CTETRT meet IEC 61000-4-5 Level 4 surge immunity?
Yes, SC441CTETRT supports ±1kV (1.2/50μs voltage, 8/20μs current, RS = 42Ω, CS = 0.5μF) per IEC 61000-4-5 Level 4 when correctly laid out - its 40A peak pulse rating and 27.5–28V clamping ensure protected circuits remain within safe operating limits. Layout adherence (short traces, full pin connection, ground vias) is mandatory to achieve this rating for SC441CTETRT.
How does SC441CTETRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SC441CTETRT uses a triggered FET to maintain near-constant clamping - 27.5–28V across 24–40A and −40°C to +125°C. This eliminates thermal derating uncertainty and enables tighter voltage margin design for 24V-tolerant ICs protected by SC441CTETRT.
Can SC441CTETRT be used on high-speed data lines like USB SuperSpeed?
No, SC441CTETRT is not suitable for USB SuperSpeed (TX/RX), DisplayPort, or HDMI data lines due to its 175pF junction capacitance - which would severely degrade signal integrity. It is strictly intended for 22V power rails or low-speed control lines (CC, SBU). For data line protection, low-capacitance devices like RClamp3371ZC (<0.25pF) must be used alongside SC441CTETRT in full USB-C solutions.
Is SC441CTETRT pin-compatible with other Semtech TDS devices?
SC441CTETRT shares the same 6-pin DFN-1.6×1.6mm footprint and pinout (pins 1–3 GND, pins 4–6 IN) with TDS2211P.C and TDS2411P, but not with TDS3311P (33V variant) or TDS1211P (12V variant) - those require voltage-specific layout review. Always verify working voltage match: SC441CTETRT is rated for 22V systems only.
SC441CTETRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- DC DC Regulator
- Topology:
- Step-Up (Boost)
- Internal Switch(s):
- Yes
- Number of Outputs:
- 4
- Voltage - Supply (Min):
- 4.5V
- Voltage - Supply (Max):
- 27V
- Voltage - Output:
- 42V
- Current - Output / Channel:
- 150mA
- Frequency:
- 700kHz
- Dimming:
- Analog, PWM
- Applications:
- Backlight
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP-EP
SC441CTETRT FAQ
1.How can I place an order for SC441CTETRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC441CTETRT 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 SC441CTETRT reliable?
The price and inventory of SC441CTETRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC441CTETRT is usually 5 days.
3.What payment methods are accepted for SC441CTETRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC441CTETRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC441CTETRT?
SC441CTETRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC441CTETRT 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 SC441CTETRT?
For technical support, including SC441CTETRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC441CTETRT requirements.
6.How does Aetrix verify that SC441CTETRT is sourced from the original manufacturer or authorized distributors?
All SC441CTETRT 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 SC441CTETRT meets industry standards.
7.What is the process for return or replacement of SC441CTETRT?
All SC441CTETRT units undergo pre-shipment inspection (PSI). If there is an issue with SC441CTETRT, 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 SC441CTETRT part is unused and in its original packaging.
Return procedure for SC441CTETRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC441CTETRT Tags
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BCR402RE6327HTSA1
Infineon Technologies
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BCR430UXTSA2
Infineon Technologies
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BCR420UE6433HTMA1
Infineon Technologies
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BCR420UE6327HTSA1
Infineon Technologies
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BCR421UE6327HTSA1
Infineon Technologies
-
LYT1604D-TL
Power Integrations
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HV9910CLG-G
Microchip Technology
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CL2N8-G
Microchip Technology
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BCR420UW6-7
Diodes Incorporated
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BCR421UW6-7
Diodes Incorporated
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BCR420UFD-7
Diodes Incorporated
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BCR421UFD-7
Diodes Incorporated
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