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Semtech Corporation SDC15.TCT
- Part No.:
- SDC15.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SDC15.TCT.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:21,110
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Product details
Overview
SDC15.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 SDC15.TCT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability across temperature and current, low dynamic resistance (<20mΩ), junction capacitance (175pF @ 22V), and validated performance in ±1kV IEC 61000-4-5 surge compliance for 22V bus protection.
Technical Context
The SDC15.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 operates across –40°C to +125°C with stable clamping and reverse leakage (<600nA at 22V), supports unsymmetrical line protection per IEC 61000-4-5, and delivers 1120W peak pulse power (8/20μs). Its functional architecture separates trigger threshold (≈27V VBR) from conduction path, enabling predictable voltage limiting independent of ambient temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC or RMS operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - ensures downstream 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during worst-case surge. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 industrial surge immunity requirements for 22V systems. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage rise under increasing surge current. |
| Junction Capacitance | 175pF @ 22V, 1MHz - compatible with moderate-speed power/data lines (e.g., USB PD VBUS, load switch inputs), not superspeed data lanes. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 system-level ESD immunity for handheld and industrial interfaces. |
Pinout & Package
SDC15.TCT is housed in a Pb-free, RoHS-compliant DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with exposed thermal pad not required; all pins must be soldered for full 40A surge rating. Pin 1 is marked by laser dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return 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., VBUS or load switch VIN); parallel connection ensures uniform current distribution and thermal balance. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V from 24A to 40A (8/20μs), eliminating design margin uncertainty vs. TVS diodes. |
| Temperature-stable protection | Clamping remains 27.5–28V from –40°C to +125°C - critical for industrial equipment operating in wide ambient ranges. |
| Low dynamic resistance | 20mΩ enables efficient energy diversion with minimal IR drop, reducing thermal stress during repeated surges. |
| High-energy surge rating | 1120W peak pulse power (8/20μs) supports robust protection against lightning-induced transients in remote meters and IoT gateways. |
| DFN space efficiency | 1.6×1.6mm footprint saves >60% board area vs. comparable SO-8 or SOT-23 TVS solutions while maintaining 6-pin current-handling redundancy. |
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, exposed to ESD and cable-borne surges. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed between connector and PD controller or buck converter input. Use Value: Maintains 27.5V clamping at 125°C - avoids overvoltage damage to 22V-rated PD controllers where standard TVS would exceed 35V at same condition. |
Use Scenario: Securing input terminals of industrial-grade load switches (e.g., HS2950P) in robotics, remote sensors, and smart meters. IC Role / Device Role / Timing Role: Surge shunt device that limits transient voltage before it reaches the internal FET gate oxide of the load switch. Use Value: Prevents gate-oxide rupture and latch-up in load switches rated for ≤24V absolute max, leveraging sub-28V clamping across full temperature range. |
| IoT Edge Gateway Power Bus Protection | Storage Device 22V Backup Power Line |
Use Scenario: Safeguarding 22V auxiliary power rails in cellular/Wi-Fi edge gateways subject to induced surges in outdoor deployments. IC Role / Device Role / Timing Role: Single-point transient suppression on main DC input prior to PMIC or battery charger IC. Use Value: Delivers 40A surge capability with <10ns response time, meeting EN 61000-4-5 for Class B industrial environments without derating. |
Use Scenario: Protecting 22V backup power paths in NVMe SSD enclosures or RAID controllers during hot-swap or power-fail events. IC Role / Device Role / Timing Role: Standby-line protector ensuring integrity of non-volatile write cache power during transient faults. Use Value: Low 175pF capacitance avoids signal integrity impact on adjacent high-speed PCIe lanes while providing ±30kV ESD robustness. |
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 1.6×1.6mm package, identical pinout and marking (T22), but differs only in reel quantity (3,000 pcs vs. unspecified for SDC15.TCT). | Same use cases: USB-C PD, load switch input, industrial 22V bus. | Select TDS2211P.C when standard tape-and-reel packaging and traceability per Semtech's ordering code are required. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, higher 30V clamping, smaller 1.0×0.6mm 2-pin DFN, no multi-pin current sharing. | Suitable for CC/SBU lines in USB-C, not for high-current VBUS or load switch inputs. | Choose uClamp2411ZA only for low-capacitance, low-current auxiliary lines - not a functional replacement for SDC15.TCT's 40A/22V primary protection role. |
Compared with TDS2211P.C, SDC15.TCT offers identical protection performance and form factor but may differ in packaging logistics; versus uClamp2411ZA, SDC15.TCT provides 67% higher surge current rating, 2.5× lower clamping voltage at rated current, and triple-pin parallel conduction - making it suitable for primary power rail protection where uClamp2411ZA is limited to auxiliary signal lines.
Availability
SDC15.TCT is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch front-ends, and 22V IoT gateway power buses requiring stable component supply with guaranteed long-term lifecycle support.
Supply support for SDC15.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 signal integrity.
The SDC15.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection with superior clamping stability and surge endurance.
FAQ
What is the maximum continuous operating voltage for SDC15.TCT?
The SDC15.TCT has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC or RMS without significant leakage. This makes it suitable for 20V USB PD VBUS lines and other 22V-rated industrial power rails. Exceeding this voltage risks premature conduction and accelerated wear.
Does SDC15.TCT require a thermal pad on the PCB?
No, the SDC15.TCT does not require an exposed thermal pad. Its DFN 1.6×1.6mm package dissipates surge energy through conduction via pins 1–3 (GND) and 4–6 (IN), and the datasheet explicitly states "no thermal pad is needed." Proper layout - including multiple vias to ground and short, wide traces - ensures optimal thermal and electrical performance for 40A surge events.
How does SDC15.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), the SDC15.TCT maintains near-constant clamping (27.5–28V) from 24A to 40A due to its FET-based shunt architecture and decreasing RDS(on). This eliminates design margin guesswork and ensures consistent protection across surge severity levels.
Can SDC15.TCT be used on high-speed data lines like USB SuperSpeed?
No, the SDC15.TCT is not suitable for USB SuperSpeed (SS), DisplayPort, or PCIe data lanes. Its 175pF junction capacitance would severely degrade signal integrity on >5Gbps links. It is intended exclusively for power or low-speed control lines (e.g., VBUS, CC, SBU, load switch enable inputs) where capacitance is non-critical.
Is SDC15.TCT compliant with RoHS and halogen-free standards?
Yes, the SDC15.TCT is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its molding compound meets UL 94V-0 flammability rating, and lead finish is lead-free - confirmed in the mechanical characteristics section of the official Semtech datasheet Rev 2.5.
SDC15.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12.8V (Max)
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 10A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 120pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
SDC15.TCT FAQ
1.How can I place an order for SDC15.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SDC15.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 SDC15.TCT reliable?
The price and inventory of SDC15.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SDC15.TCT is usually 5 days.
3.What payment methods are accepted for SDC15.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SDC15.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SDC15.TCT?
SDC15.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SDC15.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 SDC15.TCT?
For technical support, including SDC15.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SDC15.TCT requirements.
6.How does Aetrix verify that SDC15.TCT is sourced from the original manufacturer or authorized distributors?
All SDC15.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 SDC15.TCT meets industry standards.
7.What is the process for return or replacement of SDC15.TCT?
All SDC15.TCT units undergo pre-shipment inspection (PSI). If there is an issue with SDC15.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 SDC15.TCT part is unused and in its original packaging.
Return procedure for SDC15.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SDC15.TCT Tags
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