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Semtech Corporation USC1306.TR
- Part No.:
- USC1306.TR
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
USC1306.TR.pdf
- Description:
- DIODE GEN PURP 400V 5A AXIAL TR
- Quantity:
- Payment:
- Shipping:
Inventory:7,691
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Product details
Overview
USC1306.TR from Semtech is a transient diverting suppressor designed for high-energy EOS protection on 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 20mΩ dynamic resistance. It protects USB Type-C PD buses, load switch inputs, and industrial I/O interfaces where stable clamping under temperature and current stress is critical.
For engineers reviewing the USC1306.TR datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and validated alternative parts with documented functional trade-offs.
Technical Context
The USC1306.TR 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 (8/20μs) due to decreasing RDS(on) under surge conditions.
It operates from −40°C to +125°C with <600nA reverse leakage at 22V, 175pF junction capacitance at 22V/1MHz, and maintains stable 27.5–28V clamping up to 125°C - a key differentiator versus standard TVS devices whose clamping rises with temperature and current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs) - stays below typical 29V load switch FET drain-source breakdown, preventing secondary damage. |
| Peak Pulse Current | 40 A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment and USB PD endpoints. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds USB IF ESD requirements and enables robust front-end protection without additional stages. |
| Dynamic Resistance | 20 mΩ - ensures minimal voltage rise during high di/dt transients, critical for fast-rising lightning surges. |
| Junction Capacitance | 175 pF at 22V/1MHz - low enough for DC power rails and slow-slew I/O, but not suitable for high-speed data lines. |
Pinout & Package
USC1306.TR is housed in a RoHS-compliant DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All six terminals are electrically active: three GND pins (1–3) and three IN pins (4–6), requiring parallel connection for full 40A rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path; all three must be connected with low-inductance vias to maximize surge current handling and minimize ground bounce. |
| 4, 5, 6 | IN | Protected line input; tied together externally to distribute surge current evenly across internal FET channels and achieve rated 40A performance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5 V across 24–40A and −40°C to +125°C - eliminates design margin inflation needed with TVS diodes. |
| FET-based shunt protection | Surge energy diverted through low-RDS(on) channel instead of PN-junction heating - enables higher single-pulse survivability than TVS. |
| High EFT immunity | ±4 kV per IEC 61000-4-4 (5/50 ns, 100 kHz & 5 kHz) - protects against repetitive burst noise in motor drives and PLC I/O modules. |
| Low leakage & capacitance | ≤600 nA @ 22V and 175 pF @ 1 MHz - minimizes standby power loss and signal distortion on 22V supply rails. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input 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 suppressor placed between connector and PD controller or load switch input. Use Value: Maintains 27.5–28V clamping across temperature and current - prevents overvoltage damage to 29V-rated PD controllers even at 125°C ambient. |
Use Scenario: Safeguarding enable and input pins of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation. IC Role / Device Role / Timing Role: Front-end transient clamp limiting voltage seen by internal FET gate oxide and drain-source junction. Use Value: 20mΩ dynamic resistance ensures sub-100ns response and limits peak overshoot to <28.5V during 1.2/50μs surges - within safe operating area of 30V-rated switches. |
| IoT Device Power Rail Protection | Storage Device 22V Supply Protection |
Use Scenario: Securing 22V auxiliary rails in battery-powered IoT gateways with cellular/Wi-Fi modules, subject to ESD and induced surges. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks for space-constrained edge nodes. Use Value: 1.6 mm × 1.6 mm footprint saves >60% board area vs. discrete TVS+capacitor solutions while delivering superior clamping stability. |
Use Scenario: Protecting 22V backup or auxiliary supplies in NVMe SSD enclosures and enterprise storage controllers exposed to hot-plug transients. IC Role / Device Role / Timing Role: Standoff protector on power input before DC-DC conversion or LDO regulation. Use Value: 600 nA max leakage at 22V avoids measurable quiescent current increase - critical for always-on storage management ICs. |
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 pinout, same 22V working voltage, 40A rating, and DFN-6 package; datasheet confirms identical electrical specs and functional diagram. | Direct drop-in replacement - shares same marking code "T22", tape-and-reel packaging, and Semtech qualification data. | Select TDS2211P when sourcing from authorized Semtech distributors with full traceability and extended lifecycle support. |
| SP1003-220K | 22V standoff, ±30kV ESD, but only 20A IPP (8/20μs); clamping rises to ~32V at 20A; uses SOD-323 package (larger, 2-pin). | Limited to lower-energy applications; unsuitable for IEC 61000-4-5 Level 4 compliance or USB PD full-power operation. | Choose SP1003-220K only for cost-sensitive, low-surge environments where 20A rating suffices and board space allows SOD-323 placement. |
Compared with USC1306.TR, TDS2211P offers identical performance and form factor with full manufacturer documentation, while SP1003-220K trades surge capability and package size for lower unit cost - making it viable only where 20A IPP and higher clamping are acceptable.
Availability
USC1306.TR is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch protection, and IoT 22V power rail applications requiring stable component supply, long-term manufacturability, and guaranteed RoHS/REACH compliance.
Supply support for USC1306.TR 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 USC1306.TR belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace traditional TVS diodes in high-reliability 22V power and interface protection where clamping stability across temperature and current is non-negotiable.
FAQ
What is the exact package type and dimensions of the USC1306.TR?
The USC1306.TR uses a 6-pin DFN package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed pad. Pin 1–3 are GND; Pin 4–6 are IN. All six terminals must be soldered - no thermal pad required, as energy is dissipated in the silicon FET structure. Land pattern follows Semtech's recommended layout with multiple ground vias.
Does the USC1306.TR meet IEC 61000-4-5 surge immunity standards?
Yes, the USC1306.TR is rated for 40A peak pulse current with 8/20μs waveform per IEC 61000-4-5, and supports ±1kV combination wave (1.2/50μs voltage + 8/20μs current, RS = 42Ω) on unsymmetrical lines. Its 27.5–28V clamping at 40A ensures downstream components remain within safe operating voltage limits during Level 4 industrial surges.
How does the USC1306.TR differ from standard TVS diodes in clamping behavior?
Unlike TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), the USC1306.TR uses a triggered FET shunt that maintains near-constant clamping (27.5–28V) from 24A to 40A and across −40°C to +125°C. This eliminates the need for oversized margins in high-temperature or high-current designs.
Can the USC1306.TR be used on high-speed data lines like USB SuperSpeed or PCIe?
No - the USC1306.TR has 175pF junction capacitance at 22V, which would severely degrade signal integrity on >100MHz differential buses. It is intended exclusively for DC power rails and low-slew I/O lines. For USB SS, DP/DM, or PCIe lanes, Semtech recommends low-capacitance TVS like RClamp3371ZC (<0.25pF).
What is the maximum continuous reverse leakage current for USC1306.TR at 22V?
The USC1306.TR specifies a maximum reverse leakage current of 600 nA at VRWM = 22V and TA = 25°C. Leakage remains below 900 nA across the full −40°C to +125°C operating range, ensuring negligible impact on standby power in battery-backed or always-on systems using the USC1306.TR.
USC1306.TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 5A
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 3 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 20 µA @ 400 V
- Capacitance @ Vr, F:
- 90pF @ 10V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -55°C ~ 150°C
USC1306.TR FAQ
1.How can I place an order for USC1306.TR through Aetrix?
Please submit a Request for Quotation (RFQ) for USC1306.TR 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 USC1306.TR reliable?
The price and inventory of USC1306.TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USC1306.TR is usually 5 days.
3.What payment methods are accepted for USC1306.TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USC1306.TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USC1306.TR?
USC1306.TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USC1306.TR 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 USC1306.TR?
For technical support, including USC1306.TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USC1306.TR requirements.
6.How does Aetrix verify that USC1306.TR is sourced from the original manufacturer or authorized distributors?
All USC1306.TR 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 USC1306.TR meets industry standards.
7.What is the process for return or replacement of USC1306.TR?
All USC1306.TR units undergo pre-shipment inspection (PSI). If there is an issue with USC1306.TR, 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 USC1306.TR part is unused and in its original packaging.
Return procedure for USC1306.TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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