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Semtech Corporation SC195ULTRT
- Part No.:
- SC195ULTRT
- Manufacturer:
- Semtech Corporation
- Package:
- 8-UFQFN
- Datasheet:
-
SC195ULTRT.pdf
- Description:
- IC REG BUCK PROG 500MA 8MLPQ
- Quantity:
- Payment:
- Shipping:
Inventory:8,324
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Product details
Overview
SC195ULTRT from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A (8/20μs) peak pulse current handling, and a stable 27.5–28V clamping voltage across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SC195ULTRT datasheet, pinout, applications, or equivalent options, this device offers superior clamping stability versus conventional TVS diodes, precise 22V working voltage alignment, low 20mΩ dynamic resistance, and DFN 1.6×1.6mm footprint optimization for space-constrained USB and IoT interfaces.
Technical Context
The SC195ULTRT implements a surge-rated FET as its primary protection element, activated by an integrated precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown threshold. Unlike standard TVS diodes, its clamping voltage remains nearly constant due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C, supports unsymmetrical line surge testing per IEC 61000-4-5 (±1kV, 1.2/50μs), and delivers 1120W peak pulse power with only 175pF junction capacitance at 22V reverse bias - enabling robust protection without signal integrity compromise on high-speed or power-dense buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail tolerances without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays within safe margin below typical 30V load switch FET VDS(max). |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer and industrial ports. |
| Peak Pulse Current | 40A (8/20μs) - satisfies IEC 61000-4-5 surge immunity for Class 3 industrial equipment. |
| Dynamic Resistance | 20mΩ - ensures minimal voltage rise during surge conduction, critical for low-voltage margin systems. |
| Junction Capacitance | 175pF at 22V - low enough to avoid signal distortion on 10–50MHz power bus monitoring lines. |
| Package | DFN 1.6mm × 1.6mm × 0.55mm, 6-lead - enables <1.0mm² PCB area usage, ideal for ultra-compact USB-C connectors. |
Pinout & Package
SC195ULTRT uses a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad not required - all six terminals are electrically active and must be connected for full surge rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to minimize inductance and maximize 40A capability. |
| 4, 5, 6 | IN | Protected line input - tied directly to VBUS or power/data line; parallel connection ensures uniform current sharing and thermal distribution. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A surge - eliminates need for oversized TVS to meet worst-case VC limits. |
| Temperature-stable protection | Clamping holds 27.5–28V from –40°C to +125°C - removes thermal derating calculations for industrial ambient designs. |
| Low dynamic resistance | 20mΩ enables <1V IR drop at 40A - preserves voltage margin for downstream 24V-rated ICs and regulators. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) - supports repeated lightning-surge events without degradation. |
| Ultra-low leakage | ≤600nA at 22V - avoids measurable power loss in always-on battery-backed or energy-harvesting systems. |
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 system-level surges. IC Role / Device Role / Timing Role: Primary EOS shunt protector placed between connector and PD controller/load switch, responding within nanoseconds to transients. Use Value: Maintains 27.5V clamping at full 40A surge - keeps PD controller gate-source voltage safely below absolute maximum ratings even at 125°C ambient. |
Use Scenario: Safeguarding enable and input pins of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation modules. IC Role / Device Role / Timing Role: Transient voltage limiter on VIN rail, preventing latch-up or gate oxide damage in integrated FETs during lightning-induced coupling. Use Value: 20mΩ RDYN limits clamping overshoot to <0.8V above VBR, ensuring internal switch FET remains within safe SOA during 1kV/42Ω surge events. |
| IoT Edge Node Power Bus Protection | Storage Device 24V Backup Rail Protection |
|
Use Scenario: Securing 22V auxiliary rails powering cellular modems, GNSS receivers, and sensor hubs in outdoor-connected IoT gateways. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input, operating without external bias or control signals. Use Value: 175pF capacitance avoids resonance with typical 10–100μF bulk capacitors, preserving startup stability and ripple rejection. |
Use Scenario: Protecting 24V backup power inputs in NVMe SSD enclosures and RAID controllers subject to hot-plug and field-service surges. IC Role / Device Role / Timing Role: Fail-safe clamping element placed before buck converters and PMICs, rated for continuous 22V operation. Use Value: ±30kV ESD rating prevents latent damage during technician handling; UL 94V-0 molding compound meets enclosure flammability compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Identical electrical specs, same DFN 1.6×1.6mm package, identical pinout (GND on 1–3, IN on 4–6), same Semtech manufacturing and qualification. | Direct second-source part with identical marking code T22 and tape/reel packaging (3,000 pcs/reel). | Select when requiring guaranteed cross-shipment compatibility and shared design validation history. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, higher 33V clamping, smaller 0.6×0.3mm SOD-323 package, 1-pin configuration. | Targeted at CC/SBU lines in USB-C, not suitable for VBUS or power rail protection due to lower surge rating and single-path topology. | Choose only for low-capacitance (<0.5pF), low-current signal-line protection - not a functional replacement for SC195ULTRT's power-rail role. |
Compared with TDS2211P, SC195ULTRT is functionally identical and interchangeable; compared with uClamp2411ZA, it provides 2× peak current capacity, 5V lower clamping, and 3× thermal mass - making it the sole viable option for 22V power-line EOS hardening.
Availability
SC195ULTRT is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch front-ends, and IoT edge node power bus protection requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for SC195ULTRT 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 protection, sensing, and connectivity.
The SC195ULTRT belongs to Semtech's Transient Diverting Suppressor (TDS) family - engineered specifically to replace conventional TVS diodes in high-reliability 20–24V power rail applications where clamping stability and temperature independence are critical.
FAQ
What is the exact pin configuration and connection requirement for SC195ULTRT?
SC195ULTRT has six terminals in a DFN package: pins 1, 2, and 3 are GND; pins 4, 5, and 6 are IN. All three GND pins must be connected to a low-inductance ground plane using multiple vias, and all three IN pins must be paralleled to the protected line - omission of any pin reduces peak pulse current rating and thermal performance. The SC195ULTRT datasheet specifies this as mandatory for achieving full 40A (8/20μs) capability.
How does SC195ULTRT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), SC195ULTRT uses a triggered FET architecture that maintains clamping voltage within 27.5–28V from 24A to 40A. This near-constant clamping - confirmed across –40°C to +125°C - eliminates thermal derating and enables tighter voltage margin designs impossible with traditional TVS solutions.
Can SC195ULTRT be used on bidirectional data lines like USB DP/DM?
No - SC195ULTRT is a unidirectional, power-rail-focused suppressor with asymmetric pin grouping (GND vs. IN) and 175pF junction capacitance, making it unsuitable for high-speed differential data lines. For DP/DM protection, Semtech recommends RClamp3371ZC (<0.25pF). The SC195ULTRT is specified only for single-ended 22V power or control lines such as VBUS, load switch inputs, or 24V backup rails.
What is the maximum operating temperature and thermal derating profile for SC195ULTRT?
SC195ULTRT is rated for continuous operation from –40°C to +125°C ambient, with no thermal derating required for clamping voltage or peak pulse current. Its clamping voltage remains stable at 27.5–28V across the full temperature range, and its 40A (8/20μs) rating applies at all temperatures - verified in Figure 3 and Table 2 of the official SC195ULTRT datasheet.
Is SC195ULTRT compliant with RoHS, REACH, and halogen-free standards?
Yes - SC195ULTRT is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and WEEE Directive 2012/19/EU. Its molding compound carries UL 94V-0 flammability rating, and lead finish is 100% matte tin. Compliance documentation, including material declarations and test reports, is available through Semtech's official product portal for SC195ULTRT.
SC195ULTRT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- 8-UFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Programmable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.9V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 3.3V
- Current - Output:
- 500mA
- Frequency - Switching:
- 3.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MLPQ-UT (1.5x1.5)
SC195ULTRT FAQ
1.How can I place an order for SC195ULTRT through Aetrix?
Please submit a Request for Quotation (RFQ) for SC195ULTRT 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 SC195ULTRT reliable?
The price and inventory of SC195ULTRT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SC195ULTRT is usually 5 days.
3.What payment methods are accepted for SC195ULTRT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SC195ULTRT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SC195ULTRT?
SC195ULTRT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SC195ULTRT 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 SC195ULTRT?
For technical support, including SC195ULTRT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SC195ULTRT requirements.
6.How does Aetrix verify that SC195ULTRT is sourced from the original manufacturer or authorized distributors?
All SC195ULTRT 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 SC195ULTRT meets industry standards.
7.What is the process for return or replacement of SC195ULTRT?
All SC195ULTRT units undergo pre-shipment inspection (PSI). If there is an issue with SC195ULTRT, 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 SC195ULTRT part is unused and in its original packaging.
Return procedure for SC195ULTRT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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