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Semtech Corporation SMDA05C-8.TBT
- Part No.:
- SMDA05C-8.TBT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA05C-8.TBT.pdf
- Description:
- TVS DIODE 5VWM 9.8VC 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:780
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Product details
Overview
SMDA05C-8.TBT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and 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 SMDA05C-8.TBT datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under surge, low dynamic resistance (<20 mΩ), junction capacitance (175 pF at 22V), DFN 1.6×1.6mm package constraints, and compatibility with 22V bus systems requiring robust EOS resilience beyond standard TVS diodes.
Technical Context
The SMDA05C-8.TBT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold. Unlike conventional TVS diodes, its clamping voltage remains nearly constant (27.5–28V) from 24A to 40A IPP due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C ambient, maintains <600 nA reverse leakage at 22V, and delivers 1120W peak pulse power (8/20μs). Its functional architecture separates trigger sensing (VBR ≈ 27.9V typ.) from low-impedance shunt conduction, enabling superior thermal stability versus junction-limited TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22 V - defines maximum continuous DC operating voltage on protected line without leakage or degradation. |
| Clamping Voltage | 27.5–28 V at 40A (8/20μs + 1.2/50μs combo wave, RS = 2Ω) - ensures downstream ICs (e.g., USB PD controllers) remain below damage thresholds during surge events. |
| Peak Pulse Current | 40 A (8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1 kV, RS = 42Ω) on unsymmetrical lines. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds industrial and consumer ESD immunity requirements for connector-facing protection. |
| Dynamic Resistance | 20 mΩ (measured 1–40A, 8/20μs) - enables low-voltage drop during high-current transients, minimizing energy dissipation in silicon. |
| Junction Capacitance | 175 pF at 22V, 1 MHz - suitable for DC/low-speed power rails; not intended for high-speed data lines (e.g., USB SS, PCIe). |
Pinout & Package
Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish. Pin 1 marked with laser dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be connected to maximize current sharing and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBus, load switch input); all three pins are internally tied and must be shorted externally for full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5 V across 24–40A IPP and –40°C to +125°C - eliminates derating uncertainty in thermal design. |
| FET-based shunt topology | Replaces PN-junction TVS with low-RDS(on) MOSFET, reducing thermal stress and enabling higher surge endurance than silicon avalanche diodes. |
| High-energy surge handling | 1120 W peak pulse power (8/20μs) - sustains repeated lightning-surge-level transients without parametric shift or failure. |
| Low-leakage protection | ≤600 nA reverse leakage at 22V - prevents battery drain or signal integrity issues in always-on industrial or IoT power rails. |
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 profiles against ESD, lightning surges, and hot-plug transients. IC Role / Device Role / Timing Role: Primary front-end EOS suppressor placed between connector and PD controller/load switch, clamping transients before they reach sensitive silicon. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to PD controllers rated for ≤30V absolute max. |
Use Scenario: Front-end protection of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment exposed to field-installed wiring surges. IC Role / Device Role / Timing Role: Surge diverter that limits voltage across load switch FET's drain-source during EOS, preventing gate oxide rupture or avalanche failure. Use Value: Enables use of cost-optimized load switches without requiring internal overvoltage protection, reducing BOM count and layout area. |
| IoT Edge Node Power Rail Protection | Industrial Storage Device DC Input Protection |
Use Scenario: Securing 22V-rated auxiliary power inputs on battery-backed IoT gateways or edge AI modules subject to EFT bursts and cable discharge events. IC Role / Device Role / Timing Role: Single-device solution replacing multi-stage TVS+MOV networks, providing fast response (<1 ns trigger latency) and repeatable clamping. Use Value: Eliminates need for external series impedance or thermal management - fits in <2.6 mm² footprint while meeting IEC 61000-4-4 ±4 kV EFT. |
Use Scenario: Protecting SATA or NVMe storage module 12–22V DC inputs against induced surges from shared chassis power distribution in industrial servers. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC rail, coordinated with low-capacitance TVS on data lanes (e.g., RClamp3371ZC). Use Value: Prevents latch-up or burnout in PMICs and SSD controllers during 40A surge events - validated per IEC 61000-4-5 waveform standards. |
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 and marking (T22XX), manufactured by Semtech - confirmed direct replacement per Semtech ordering documentation. | Same use cases: USB-C PD, load switch input, industrial 22V rails. | Select SMDA05C-8.TBT when sourcing through authorized distributors with traceable lot control; TDS2211P may have alternate reel packaging or date-code formatting. |
| uClamp2411ZA | 24V working voltage, lower 20A IPP rating, smaller 0.6×0.6mm DFN package, higher clamping (~32V at 20A), 12 pF capacitance - optimized for CC/SBU lines, not power rails. | Limited to low-current, low-capacitance interfaces (e.g., USB-C configuration channel); unsuitable for 40A surge or 22V bus protection. | Use uClamp2411ZA only for auxiliary signal lines; SMDA05C-8.TBT remains required for main power rail protection where current and clamping voltage are critical. |
Compared with TDS2211P, SMDA05C-8.TBT offers identical protection performance and mechanical fit; compared with uClamp2411ZA, it delivers 2× peak current capability and 4.5V lower clamping at rated surge - making it the sole viable option for 22V power rail EOS hardening.
Availability
SMDA05C-8.TBT is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch front-ends, and IoT edge node power rails requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMDA05C-8.TBT 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.
SMDA05C-8.TBT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace traditional TVS diodes in high-reliability 22V power rail protection applications demanding stable clamping, low thermal drift, and high surge endurance.
FAQ
What is the maximum continuous operating voltage for SMDA05C-8.TBT?
The SMDA05C-8.TBT has a reverse stand-off voltage (VRWM) of 22 V, meaning it can continuously block up to 22 V DC without significant leakage or degradation. This makes it suitable for nominal 20V USB PD buses and other 22V-rated industrial power rails. Exceeding this voltage risks increased reverse leakage and potential device failure.
Does SMDA05C-8.TBT require external bias or control signals to operate?
No, the SMDA05C-8.TBT is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET - no external power, enable pin, or configuration is needed. Operation begins automatically when transient voltage exceeds the internal breakdown threshold (~27.9 V), turning on the shunt path to ground.
Can SMDA05C-8.TBT be used on high-speed data lines like USB SuperSpeed or PCIe?
No, the SMDA05C-8.TBT is not suitable for high-speed data lines. Its 175 pF junction capacitance at 22V would severely degrade signal integrity on differential pairs operating above ~100 Mbps. It is designed exclusively for DC or low-frequency power and control lines - use low-capacitance TVS like RClamp3371ZC (<0.25 pF) for USB SS or DP/DM lanes.
How does SMDA05C-8.TBT's clamping behavior differ from standard TVS diodes?
Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (VC = VBR + IPP × RDYN), the SMDA05C-8.TBT maintains near-constant clamping (27.5–28 V) from 24A to 40A due to its FET-based shunt architecture. This eliminates thermal derating uncertainty and ensures predictable protection across temperature and surge magnitude.
What PCB layout practices are critical for optimal SMDA05C-8.TBT performance?
For optimal SMDA05C-8.TBT performance, connect all three IN pins (4,5,6) via a single low-inductance trace to the protected line, and tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Place the device within 5 mm of the connector entry point to minimize coupled transients. Avoid thermal pads - energy is dissipated in the silicon, not the package.
SMDA05C-8.TBT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Series:
- SMDAC-8
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 8
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 9.8V
- Current - Peak Pulse (10/1000µs):
- 17A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 350pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SOIC
SMDA05C-8.TBT FAQ
1.How can I place an order for SMDA05C-8.TBT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA05C-8.TBT 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 SMDA05C-8.TBT reliable?
The price and inventory of SMDA05C-8.TBT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA05C-8.TBT is usually 5 days.
3.What payment methods are accepted for SMDA05C-8.TBT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA05C-8.TBT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA05C-8.TBT?
SMDA05C-8.TBT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA05C-8.TBT 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 SMDA05C-8.TBT?
For technical support, including SMDA05C-8.TBT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA05C-8.TBT requirements.
6.How does Aetrix verify that SMDA05C-8.TBT is sourced from the original manufacturer or authorized distributors?
All SMDA05C-8.TBT 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 SMDA05C-8.TBT meets industry standards.
7.What is the process for return or replacement of SMDA05C-8.TBT?
All SMDA05C-8.TBT units undergo pre-shipment inspection (PSI). If there is an issue with SMDA05C-8.TBT, 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 SMDA05C-8.TBT part is unused and in its original packaging.
Return procedure for SMDA05C-8.TBT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDA05C-8.TBT Tags
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