My Inquiry
My Account
Semtech Corporation SC561ULTRT
- Part No.:
- SC561ULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-UFQFN
- Datasheet:
-
SC561ULTRT.pdf
- Description:
- IC REG LIN 2.85V/3.1V 8MLPQ-UT
- Quantity:
- Payment:
- Shipping:
Inventory:2,267
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SC561ULTRT 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 175pF junction capacitance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SC561ULTRT 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 PD systems.
Technical Context
The SC561ULTRT 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 24–40A peak pulse current due to decreasing RDS(on), not fixed dynamic resistance.
It operates over −40°C to +125°C with stable 27.5–28V clamping (at 40A, 1.2/50μs + 8/20μs combo waveform, RS = 2Ω), 20mΩ dynamic resistance, and <600nA reverse leakage at 22V - enabling robust protection where thermal derating and voltage margin are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (1.2/50μs + 8/20μs combo) - stays below 30V damage threshold of most 30V-rated load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD requirements without external staging. |
| Junction Capacitance | 175pF at 22V, 1MHz - low enough for DC power rails and medium-speed control lines; not suitable for >100MHz signal paths. |
| Dynamic Resistance | 20mΩ - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
| Operating Temp | −40°C to +125°C - supports extended-temperature industrial, automotive under-hood, and outdoor IoT deployments. |
Pinout & Package
SC561ULTRT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no solder mask defined). All six terminals must be connected - three GND pins (1–3) and three IN pins (4–6) - to achieve full 40A surge rating and minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Low-inductance ground return path; all three must be vias-connected to internal ground plane for rated surge performance. |
| 4, 5, 6 | IN | Protected line input; tied together externally to deliver full 40A capability and uniform current sharing across parallel paths. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping architecture | Delivers near-constant 27.5–28V clamping across 24–40A and −40°C to +125°C - eliminates thermal runaway risk seen in silicon avalanche TVS devices. |
| Ultra-low dynamic resistance | 20mΩ ensures minimal IR drop during surge, preserving voltage margin for downstream 30V-rated ICs like e-fuses and PD controllers. |
| High-energy surge handling | 1120W peak pulse power (8/20μs) enables single-device compliance with IEC 61000-4-5 ±1kV (RS = 42Ω) on unsymmetrical lines. |
| Low leakage & stable capacitance | <600nA @ 22V and 175pF @ 1MHz support long-term reliability in battery-backed and always-on industrial sensors. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
|
Use Scenario: Protecting VBus lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at connector, clamping transients before they reach PD controller and load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to 30V-rated controllers (e.g., TUSB7320, CYPD3177) even at 125°C ambient. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., ON Semi NIS5132, TI TPS25942) in remote meters and PLC I/O modules. IC Role / Device Role / Timing Role: First-line transient diverter upstream of the load switch FET, limiting gate-source and drain-source overvoltage during surge events. Use Value: Prevents latch-up or permanent failure of internal MOSFETs by holding clamping voltage below 30V - critical for switches with 30V absolute max ratings. |
| IoT Edge Node Power Rail Protection | Storage Device 24V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary power inputs on battery-backed wireless gateways and edge AI nodes operating in uncontrolled environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, coordinated with upstream fuse and downstream LDO/DC-DC converter. Use Value: 40A surge rating and −40°C to +125°C operation ensure field reliability in outdoor enclosures without thermal derating penalties. |
Use Scenario: Protecting 24V backup supply rails in NVMe SSDs and enterprise storage controllers against hot-swap transients and backplane coupling. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (≤600nA) protector on non-data-critical power rail, minimizing standby current impact. Use Value: Enables use of compact DFN-6 footprint instead of larger SO-8 TVS arrays - saving >60% board area while meeting IEC 61000-4-5 Level 3. |
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 (3,000 pcs/7″ reel); manufactured by Semtech as direct variant. | No functional difference; used interchangeably in BOMs where part numbering conventions differ by distributor or region. | Select TDS2211P.C if sourcing through Digi-Key or Mouser; SC561ULTRT is preferred for direct Semtech channel or Aetrix stocking programs. |
| uClamp2411ZA.TCT | 24V working voltage, ±30kV ESD, but lower 20A IPP (8/20μs) and higher 33V clamping at 20A - uses standard TVS diode architecture, not FET-based. | Suitable only for lower-energy interfaces (CC/SBU lines in USB-C), not main VBus or load switch inputs requiring 40A rating. | Choose uClamp2411ZA.TCT only for secondary protection or space-constrained CC-line designs; not a replacement for SC561ULTRT's primary 22V rail role. |
Compared with TDS2211P.C (identical performance, alternate ordering code) and uClamp2411ZA.TCT (lower surge rating, higher clamping), SC561ULTRT delivers unique FET-based flat-clamp behavior essential for protecting 30V-rated PD controllers and load switches across full industrial temperature range.
Availability
SC561ULTRT is available at Aetrix Electronics and suitable for USB Type-C PD endpoints, industrial load switch front-ends, and IoT edge node power rails requiring stable component supply, long-lifecycle assurance, and guaranteed RoHS/halogen-free compliance.
Supply support for SC561ULTRT 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, power management, and transient protection.
The SC561ULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line - engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping across temperature and current is mandatory.
FAQ
What is the exact package type and dimensions of SC561ULTRT?
SC561ULTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with no thermal pad requirement. Pin 1–3 are GND; Pin 4–6 are IN. All six terminals must be connected to achieve full 40A surge rating and minimize parasitic inductance per Semtech's layout guidelines.
Does SC561ULTRT meet IEC 61000-4-5 Level 4 surge immunity?
Yes - SC561ULTRT is rated for 40A peak pulse current (8/20μs) and clamps at 27.5–28V under IEC 61000-4-5 combo-wave conditions (1.2/50μs voltage + 8/20μs current, RS = 2Ω), satisfying Level 4 (±1kV, RS = 42Ω) for unsymmetrical lines when properly laid out with low-inductance grounding.
How does SC561ULTRT's clamping behavior differ from standard TVS diodes?
Unlike standard TVS diodes whose clamping voltage rises linearly with current (VC = VBR + IPP × RDYN), SC561ULTRT uses a triggered FET architecture that maintains ~27.5–28V clamping across 24–40A and −40°C to +125°C - eliminating thermal derating and ensuring consistent protection margin for 30V-rated downstream ICs.
Can SC561ULTRT be used on high-speed data lines like USB SS or PCIe?
No - SC561ULTRT has 175pF junction capacitance, making it unsuitable for high-speed differential data lines (e.g., USB 3.x, PCIe Gen3+). It is intended exclusively for DC power rails and low-speed control lines. For superspeed lanes, Semtech recommends RClamp3371ZC (<0.25pF).
Is SC561ULTRT compatible with lead-free reflow profiles?
Yes - SC561ULTRT is Pb-free, halogen-free, and RoHS/WEEE compliant. Its DFN package supports standard JEDEC J-STD-020D reflow profiles, including peak temperatures up to 260°C. The molding compound meets UL 94V-0 flammability rating.
SC561ULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 2.85V, 3.1V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 250mA, 0.25V @ 250mA
- Current - Output:
- 300mA, 300mA
- Current - Quiescent (Iq):
- 60 µA
- Current - Supply (Max):
- 85 µA
- PSRR:
- 65dB (1kHz)
- Control Features:
- Enable, Power Good
- Protection Features:
- Over Temperature, Short Circuit, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLPQ-UT (1.5x1.5)
SC561ULTRT FAQ
1.How can I place an order for SC561ULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC561ULTRT 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 SC561ULTRT reliable?
The price and inventory of SC561ULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC561ULTRT is usually 5 days.
3.What payment methods are accepted for SC561ULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC561ULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC561ULTRT?
SC561ULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC561ULTRT 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 SC561ULTRT?
For technical support, including SC561ULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC561ULTRT requirements.
6.How does Aetrix verify that SC561ULTRT is sourced from the original manufacturer or authorized distributors?
All SC561ULTRT 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 SC561ULTRT meets industry standards.
7.What is the process for return or replacement of SC561ULTRT?
All SC561ULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC561ULTRT, 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 SC561ULTRT part is unused and in its original packaging.
Return procedure for SC561ULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SC561ULTRT Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
