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Semtech Corporation SR05.TCT
- Part No.:
- SR05.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-253-4, TO-253AA
- Datasheet:
-
SR05.TCT.pdf
- Description:
- TVS DIODE 5VWM 20VC SOT143-4
- Quantity:
- Payment:
- Shipping:
Inventory:103,392
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Product details
Overview
SR05.TCT 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 (8/20μs) peak pulse current handling, 27.5–28V clamping voltage at 40A, and DFN 1.6×1.6×0.55mm 6-lead package - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SR05.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance (<20 mΩ), junction capacitance (175 pF @ 22V), and compatibility with 22V bus architectures requiring robust surge resilience without thermal derating penalties.
Technical Context
The SR05.TCT 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 (27.5–28V) from 24A to 40A due to decreasing RDS(on) under surge conditions.
It delivers stable performance from −40°C to +125°C with <0.1Ω effective ON-resistance, 1120W peak pulse power rating, and 130–600nA reverse leakage at 22V - enabling reliable protection in thermally constrained industrial and portable applications where traditional TVS devices exhibit rising clamping with temperature and current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - supports nominal 20V USB PD bus and industrial 24V systems without DC blocking or derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - limits protected IC stress below typical 30V damage thresholds of USB PD controllers and load switches. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 3 (±1kV, RS=42Ω) and industrial surge requirements. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Class 4 immunity for handheld and connector-facing interfaces. |
| Junction Capacitance | 175pF @ 22V, 1MHz - compatible with medium-speed power/data lines (e.g., VBUS, CC, SBU), not superspeed lanes. |
| Dynamic Resistance | 20mΩ - ensures minimal IR drop during surge conduction, preserving clamping accuracy and thermal efficiency. |
| Package | DFN 1.6×1.6×0.55mm, 6-lead - enables ultra-compact placement near connectors with no thermal pad required. |
Pinout & Package
SR05.TCT is housed in a RoHS-compliant, halogen-free DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad omitted (energy dissipated in silicon). All pins must be soldered: Pins 1–3 are GND; Pins 4–6 are IN - parallel connection of all three terminals per side maximizes surge current sharing and minimizes parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to minimize inductance and maximize 40A capability. |
| Pins 4, 5, 6 | IN | Protected line input (e.g., VBUS, load switch VIN); parallel routing ensures uniform current division and low impedance path to GND. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage stays within 27.5–28V from 24A to 40A and −40°C to +125°C - eliminates thermal/current-dependent overshoot seen in TVS diodes. |
| FET-based shunt topology | Surge-rated MOSFET replaces PN junction; enables sub-0.1Ω ON-resistance and 1120W peak power handling in 1.6mm² footprint. |
| Low-leakage protection | 130–600nA reverse leakage at 22V - avoids system standby current penalty in battery-powered IoT and portable devices. |
| UL 94V-0 molding compound | Flame-retardant encapsulation meets IPC/JEDEC standards for industrial and automotive-adjacent equipment safety compliance. |
| Tape-and-reel packaging | 3,000 units per 7″ reel - supports automated SMT assembly with standard DFN pick-and-place tooling and fiducial alignment. |
Applications
| USB Type-C Power Delivery Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB-C receptacles supporting up to 20V/5A PD negotiation against lightning surges and hot-plug transients. IC Role / Device Role / Timing Role: Front-end transient shunt placed between connector and PD controller or load switch, clamping before downstream ICs see >30V stress. Use Value: Maintains 27.5V clamping at full 40A surge and 125°C ambient - prevents false overvoltage shutdown and extends PD controller lifetime versus TVS alternatives. |
Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and PLC I/O modules. IC Role / Device Role / Timing Role: Primary EOS barrier upstream of the load switch's internal FET, limiting gate-source and drain-source voltage stress during surge events. Use Value: Enables use of cost-optimized load switches rated only to 30V by holding clamping below 28V - avoids need for higher-voltage, higher-RDS(on) alternatives. |
| IoT Edge Node Power Bus Protection | Notebook/Tablet VBUS Line Protection |
|
Use Scenario: Securing 22V-capable power rails in battery-backed smart sensors and gateway devices exposed to ESD during field servicing or docking. IC Role / Device Role / Timing Role: Standalone EOS suppressor on main power input, operating continuously across −40°C to +85°C ambient without derating. Use Value: 175pF capacitance and <600nA leakage allow integration without compromising battery runtime or signal integrity on auxiliary monitoring lines. |
Use Scenario: Protecting VBUS paths in ultraportable notebooks and tablets where board space is constrained and thermal management is limited. IC Role / Device Role / Timing Role: Compact, low-profile transient suppressor mounted directly at USB-C port, minimizing trace length to reduce inductive kick during ESD events. Use Value: 1.6×1.6mm DFN package saves >50% area vs. SO-8 TVS solutions while delivering superior clamping consistency - critical for thin-form-factor designs. |
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 package, identical marking code "T22" - direct Semtech-manufactured variant with tape-and-reel packaging. | Same USB PD, load switch, and industrial use cases; differs only in packaging format (C = 3,000/reel) and date-code marking convention. | Select TDS2211P.C when sourcing from authorized Semtech distribution channels with full traceability and standard reel logistics. |
| SMAJ22A | Standard unidirectional TVS diode; 22V VRWM, 35.5V VC @ 12.3A (8/20μs); higher clamping, fixed RDYN (~0.8Ω), degrades above 85°C. | Acceptable for lower-energy surges or non-critical 22V lines where 35.5V clamping is tolerable; unsuitable for high-temp or high-IPP USB PD designs. | Choose SMAJ22A only for cost-sensitive, non-thermal-critical applications where clamping margin >7V is acceptable and peak current ≤12A. |
Compared with TDS2211P.C and SMAJ22A, SR05.TCT provides identical core protection performance to the former but may differ in date-code formatting or minor packaging labeling; versus SMAJ22A, it delivers 7.5V lower clamping at full 40A and stable operation across full industrial temperature range - making it essential for thermally demanding, high-reliability 22V bus protection.
Availability
SR05.TCT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and IoT edge node power buses requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/REACH compliance.
Supply support for SR05.TCT 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.
SR05.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-energy EOS applications where clamping stability, temperature independence, and compact size are critical design constraints.
FAQ
What is the maximum continuous operating voltage for SR05.TCT?
The SR05.TCT has a reverse stand-off voltage (VRWM) of 22V, meaning it can reliably block up to 22V DC or RMS voltage in normal operation without leakage exceeding 600nA. This makes SR05.TCT suitable for 20V USB PD buses and 24V industrial power rails where transient headroom is required without forward conduction.
Does SR05.TCT require a thermal pad on the PCB?
No, SR05.TCT does not require a thermal pad. Its DFN package dissipates surge energy internally via the silicon FET structure rather than through conduction to the PCB. The datasheet explicitly states "no thermal pad is needed," and layout guidelines emphasize low-inductance GND vias instead of copper pour under the device.
How does SR05.TCT achieve constant clamping voltage across varying surge currents?
SR05.TCT achieves constant clamping by using a surge-rated MOSFET whose RDS(on) decreases under high-current surge conditions. As peak pulse current rises from 24A to 40A, the FET's ON-resistance drops sufficiently to offset IR rise, resulting in stable 27.5–28V clamping - unlike TVS diodes whose VC increases linearly with IPP × RDYN.
Can SR05.TCT be used on high-speed data lines like USB SuperSpeed or DisplayPort?
No, SR05.TCT is not suitable for USB SuperSpeed (SS), DisplayPort, or other high-speed differential data lanes. Its 175pF junction capacitance would severely degrade signal integrity. It is intended for VBUS, CC, SBU, and power-line protection only - low-capacitance devices like RClamp3371ZC (<0.25pF) must be used for SS/DP/DM lines alongside SR05.TCT.
What is the recommended PCB layout for optimal surge performance of SR05.TCT?
Place SR05.TCT as close as possible to the protected connector. Connect all three IN pins (4–6) with a single short, wide trace to the protected line, and tie all three GND pins (1–3) directly to a solid ground plane using multiple vias. Avoid stubs or splits - this minimizes parasitic inductance and ensures full 40A current sharing across parallel terminals.
SR05.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-253-4, TO-253AA
- Series:
- RailClamp®, SR
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 20V
- Current - Peak Pulse (10/1000µs):
- 25A (8/20µs)
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 6pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-143
SR05.TCT FAQ
1.How can I place an order for SR05.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SR05.TCT 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 SR05.TCT reliable?
The price and inventory of SR05.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SR05.TCT is usually 5 days.
3.What payment methods are accepted for SR05.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SR05.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SR05.TCT?
SR05.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SR05.TCT 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 SR05.TCT?
For technical support, including SR05.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SR05.TCT requirements.
6.How does Aetrix verify that SR05.TCT is sourced from the original manufacturer or authorized distributors?
All SR05.TCT 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 SR05.TCT meets industry standards.
7.What is the process for return or replacement of SR05.TCT?
All SR05.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SR05.TCT, 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 SR05.TCT part is unused and in its original packaging.
Return procedure for SR05.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SR05.TCT Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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