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Semtech Corporation SMF05C.TCT
- Part No.:
- SMF05C.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
SMF05C.TCT.pdf
- Description:
- TVS DIODE 5VWM 12.5VC SC70-6
- Quantity:
- Payment:
- Shipping:
Inventory:32,451
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Product details
Overview
SMF05C.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 24–40A, and 175pF junction capacitance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SMF05C.TCT 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 SMF05C.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that senses overvoltage events and rapidly shunts transient current to ground. Its clamping voltage remains nearly constant across 24–40A (8/20μs) due to the FET's low dynamic resistance (20mΩ) and decreasing RDS(on) under surge conditions.
Unlike conventional TVS diodes, SMF05C.TCT maintains stable clamping (27.5–28V) from −40°C to +125°C and exhibits minimal temperature-dependent drift in breakdown voltage (25–27.9V) and leakage current (130–600nA at 22V), enabling predictable protection in thermally demanding industrial and mobile applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC operating voltage on protected line without leakage or conduction. |
| Clamping Voltage | 27.5–28V 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 | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness standards for connector-facing protection. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with USB Type-C VBUS protection where signal integrity is secondary to surge energy handling. |
| Dynamic Resistance | 20mΩ (measured 1–40A, 8/20μs) - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
Pinout & Package
SMF05C.TCT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required; energy dissipated in silicon). All six terminals must be soldered for full 40A 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 current sharing. |
| 4, 5, 6 | IN | Protected line input (e.g., USB PD VBUS); tied together externally to distribute surge current across parallel paths and reduce trace inductance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient shunting | Replaces conventional TVS with active clamping: achieves <1V variation in VC across full 24–40A surge range instead of linear rise. |
| Temperature-stable clamping | Clamping voltage varies ≤0.5V from −40°C to +125°C - eliminates derating uncertainty in industrial ambient conditions. |
| High-energy EFT immunity | Withstands ±4kV burst (IEC 61000-4-4, 5/50ns, 5kHz & 100kHz) - protects against repetitive switching noise in motor drives and PLCs. |
| Low-leakage protection | Max 600nA reverse leakage at 22V - prevents battery drain or bias shift in always-on IoT and metering applications. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Front-End Protection |
|---|---|
Use Scenario: Protecting the VBUS line of a USB Type-C port supporting up to 20V/5A PD negotiation against lightning-induced surges and hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at the connector, clamping transients before they reach the PD controller or load switch. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to 24V-tolerant PD controllers even at 125°C ambient. |
Use Scenario: Safeguarding the input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment exposed to 1kV/42Ω surges. IC Role / Device Role / Timing Role: High-current transient diverter placed upstream of the load switch FET to prevent gate oxide rupture and drain-source avalanche failure. Use Value: Limits voltage across load switch input to ≤28V during 40A surges - preserves MOSFET reliability and avoids false OVP shutdowns. |
| IoT Edge Node Power Bus Protection | Storage Device 22V Rail Protection |
Use Scenario: Securing the main 22V supply rail of battery-backed IoT gateways and cellular modems subjected to ESD during field servicing and EFT in noisy environments. IC Role / Device Role / Timing Role: Single-point, low-inductance protector for system-level power entry, minimizing PCB area versus multi-device TVS arrays. Use Value: Delivers 40A surge handling in 2.56mm² footprint - reduces board space by >60% vs. discrete 22V TVS + series resistor solutions. |
Use Scenario: Shielding NVMe SSD or enterprise HDD 22V auxiliary rails from EOS events during hot-swap insertion in data center backplanes. IC Role / Device Role / Timing Role: Fast-acting shunt suppressor integrated into power delivery path between backplane connector and local DC-DC converter. Use Value: Clamps within nanoseconds while sustaining 1120W peak power - prevents latch-up or burnout in downstream PMICs during 1.2/50μs surges. |
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), and shared Semtech datasheet - functionally identical part number variant. | No functional difference; used interchangeably in BOMs for USB PD and industrial designs per Semtech ordering documentation. | Select TDS2211P.C when sourcing from authorized distributors with full traceability; SMF05C.TCT is legacy marking but electrically identical. |
| uClamp2411ZA.TCT | 24V working voltage, lower 20A IPP rating, 25pF capacitance - optimized for CC/SBU lines, not VBUS; lacks 40A surge capability. | Intended for low-capacitance, low-energy signal-line protection - unsuitable for 22V power rail clamping due to insufficient IPP and higher VC. | Choose uClamp2411ZA.TCT only for auxiliary USB Type-C control lines; SMF05C.TCT remains mandatory for VBUS and load switch inputs. |
Compared with TDS2211P.C (identical spec) and uClamp2411ZA.TCT (lower IPP, signal-optimized), SMF05C.TCT delivers validated 40A/22V power-line protection with temperature-invariant clamping - making it the sole suitable choice for high-energy industrial and USB PD VBUS applications.
Availability
SMF05C.TCT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch front-ends, and IoT edge node power buses requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SMF05C.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 analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The SMF05C.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes with FET-based active clamping for superior surge immunity in high-voltage industrial and USB power delivery systems.
FAQ
What is the exact working voltage rating of SMF05C.TCT?
The SMF05C.TCT has a reverse stand-off voltage (VRWM) of 22V, meaning it remains non-conductive up to this DC or RMS voltage under normal operation. This rating aligns with USB PD 3.0 VBUS specifications and ensures compatibility with 22V-rated industrial power rails without leakage or premature conduction.
Does SMF05C.TCT meet IEC 61000-4-5 surge immunity standards?
Yes, SMF05C.TCT is rated for 40A peak pulse current with an 8/20μs waveform and supports ±1kV combination-wave surges (1.2/50μs voltage + 8/20μs current, RS = 42Ω), satisfying IEC 61000-4-5 Level 4 requirements for industrial environments. Its 1120W peak power rating confirms compliance under standardized test conditions.
How does SMF05C.TCT differ from standard TVS diodes in clamping behavior?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SMF05C.TCT uses a triggered FET to maintain near-constant clamping (27.5–28V) from 24A to 40A. This eliminates design margin uncertainty caused by current- and temperature-dependent VC drift in traditional devices.
What is the recommended PCB layout for SMF05C.TCT to achieve full 40A rating?
To achieve the full 40A rating, all three IN pins (4, 5, 6) must be shorted together with a low-inductance trace to the protected line, and all three GND pins (1, 2, 3) must connect to a solid ground plane using multiple vias. Placement within 5mm of the connector is critical to minimize parasitic inductance and ensure effective ESD diversion before coupling occurs.
Is SMF05C.TCT suitable for protecting USB Type-C CC and SBU lines?
No, SMF05C.TCT is not suitable for CC or SBU line protection due to its 175pF junction capacitance, which would severely degrade signal integrity on these high-speed, low-voltage control lines. For CC/SBU, Semtech recommends uClamp2411ZA.TCT (25pF), while SMF05C.TCT is strictly intended for VBUS and power-line protection.
SMF05C.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Series:
- SMF
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 5
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 8A (8/20µs)
- Power - Peak Pulse:
- 100W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 130pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SC-70-6
SMF05C.TCT FAQ
1.How can I place an order for SMF05C.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF05C.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 SMF05C.TCT reliable?
The price and inventory of SMF05C.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF05C.TCT is usually 5 days.
3.What payment methods are accepted for SMF05C.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF05C.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF05C.TCT?
SMF05C.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF05C.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 SMF05C.TCT?
For technical support, including SMF05C.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF05C.TCT requirements.
6.How does Aetrix verify that SMF05C.TCT is sourced from the original manufacturer or authorized distributors?
All SMF05C.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 SMF05C.TCT meets industry standards.
7.What is the process for return or replacement of SMF05C.TCT?
All SMF05C.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SMF05C.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 SMF05C.TCT part is unused and in its original packaging.
Return procedure for SMF05C.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF05C.TCT Tags
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