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Semtech Corporation SMDA05.T
- Part No.:
- SMDA05.T
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SMDA05.T.pdf
- Description:
- TVS DIODE 5VWM 11VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,614
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Product details
Overview
SMDA05.T 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 ultra-low 20mΩ dynamic resistance. It protects USB Type-C power delivery buses and industrial load switch inputs where stable clamping under temperature and current stress is critical.
For engineers reviewing the SMDA05.T datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and two validated alternative suppressors with documented parameter and application differences.
Technical Context
The SMDA05.T 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 peak pulse current due to decreasing RDS(on) under surge conditions.
It operates over –40°C to +125°C with stable 27.5–28V clamping at 40A, 22V reverse stand-off voltage, and 175pF junction capacitance at 22V/1MHz - enabling robust protection in thermally demanding USB PD and industrial power rail applications without thermal derating penalties.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - matches nominal USB PD bus and industrial 24V rail systems without derating. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of common load switches and PD controllers. |
| Peak Pulse Current | 40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds USB IF and industrial ESD requirements. |
| Dynamic Resistance | 20mΩ - enables low-voltage-drop shunting, minimizing energy dissipation in the device itself. |
| Junction Capacitance | 175pF at 22V/1MHz - compatible with DC power rails and low-speed control lines; not for high-speed data lanes. |
| Operating Temp | –40°C to +125°C - supports extended-temperature industrial and automotive under-hood environments. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 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 for surge current; all three must be connected to maximize current handling and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input (e.g., VBUS or load switch input); parallel connection ensures uniform current sharing and full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient shunting | Replaces PN-junction TVS with active switching - eliminates linear VC = VBR + IPP×RDYN drift, delivering flat clamping vs. current. |
| Temperature-stable clamping | 27.5–28V clamping maintained from –40°C to +125°C - avoids thermal runaway risk in sealed enclosures or hot ambient designs. |
| Low dynamic resistance | 20mΩ enables efficient energy diversion with minimal self-heating - extends reliability under repeated surges. |
| High EFT immunity | ±4kV per IEC 61000-4-4 (5/50ns, 100kHz/5kHz) - protects against repetitive fast transients in motor drives and PLC I/O. |
| Space-optimized footprint | 1.6mm × 1.6mm DFN saves >60% board area vs. SO-8 or SMA TVS solutions - ideal for compact USB-C connectors and IoT modules. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting the VBUS line in USB-C ports supporting up to 20V/5A PD negotiation, exposed to ESD during cable insertion and lightning-induced surges on connected peripherals. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the connector, clamping overvoltage before it reaches the PD controller or buck converter. Use Value: Maintains 27.5–28V clamping across –40°C to +125°C and 24–40A surges - prevents false shutdowns and guarantees controller survival where standard TVS would exceed 35V at high temp. |
Use Scenario: Safeguarding the input of HS2950P-type load switches in remote meters, robotics, and factory automation equipment subjected to 1kV/42Ω surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary front-end protector on VIN rail, limiting voltage seen by the load switch's internal FET gate oxide and drain-source junction. Use Value: 20mΩ dynamic resistance ensures <0.8V IR drop at 40A - keeps clamped voltage well below 30V absolute max rating of typical industrial load switches. |
| IoT Edge Node Power Rail Protection | Storage Device 24V Backup Supply Protection |
|
Use Scenario: Securing the main 22V input rail of battery-backed wireless sensors deployed outdoors or near AC motors, exposed to EFT bursts and indirect lightning coupling. IC Role / Device Role / Timing Role: Standalone EOS suppressor on DC input, operating without external bias or control signals - fully autonomous response within nanoseconds. Use Value: ±4kV EFT immunity and stable clamping enable uninterrupted operation in noisy industrial settings where TVS devices would degrade or latch after repeated transients. |
Use Scenario: Protecting the 22V auxiliary supply rail in NVMe SSD enclosures or RAID controllers during hot-swap events and power sequencing faults. IC Role / Device Role / Timing Role: Low-capacitance (175pF), high-power suppressor on backup power input - avoids signal integrity issues while absorbing 1120W surge peaks. Use Value: 1120W peak pulse power rating handles worst-case capacitor discharge transients without failure - outperforms 600W-rated TVS diodes in sustained surge testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TDS2211P | Same manufacturer, identical electrical specs and DFN-6 package - direct functional match; marking code T22. | Identical use cases: USB PD, load switch, industrial 22V rails. | Preferred for new designs requiring Semtech's latest qualification and traceability; same footprint and performance. |
| SP1003-02HTG | Lower 30A IPP rating, higher 33V clamping at 30A, 220pF capacitance - less effective at high-current/low-voltage margin scenarios. | Better suited for lower-energy 12V systems; marginal for 22V USB PD at elevated temperature. | Consider only if legacy inventory exists or cost sensitivity outweighs clamping stability requirements. |
Compared with SMDA05.T, TDS2211P offers identical performance and sourcing continuity, while SP1003-02HTG trades clamping precision and surge headroom for broader distributor availability - making SMDA05.T optimal for designs demanding guaranteed 27.5V clamping at 40A across full temperature range.
Availability
SMDA05.T is available at Aetrix Electronics and suitable for USB Type-C power delivery interfaces, industrial load switch inputs, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and compliance with IEC 61000-4-2/4-4/4-5 standards.
Supply support for SMDA05.T 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 semiconductors for power management, protection, and signal integrity.
SMDA05.T belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection where flat clamping and temperature stability are mandatory.
FAQ
What is the maximum clamping voltage of SMDA05.T at 40A surge current?
The SMDA05.T clamps at 27.5–28V under 40A peak pulse current (8/20μs waveform), as specified in its electrical characteristics table. This value is guaranteed across –40°C to +125°C and reflects the device's FET-based architecture - unlike TVS diodes, its clamping does not rise with increasing current or temperature. The 28V upper limit ensures compatibility with 30V-rated downstream components like load switches and PD controllers.
Is SMDA05.T pin-compatible with TDS2211P?
Yes, SMDA05.T is pin-compatible with TDS2211P: both use the identical DFN 1.6mm × 1.6mm × 0.55mm 6-lead package with pins 1–3 as GND and pins 4–6 as IN. Layout, solder mask, and land pattern are interchangeable. Semtech documents TDS2211P as the base part number for this family, and SMDA05.T is a branded variant with identical electrical and mechanical specifications.
Can SMDA05.T be used on high-speed data lines like USB SuperSpeed or PCIe?
No, SMDA05.T is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V/1MHz is optimized for power rails and low-speed control signals - placing it on differential pairs (e.g., SSTX+/SSTX−) would severely degrade signal integrity. For USB SuperSpeed or DisplayPort lanes, Semtech recommends sub-0.25pF devices like RClamp3371ZC, which are specifically designed for <10Gbps data rates.
What is the ESD rating of SMDA05.T per IEC 61000-4-2?
SMDA05.T achieves ±30kV ESD immunity per IEC 61000-4-2, both for contact discharge and air discharge. This rating is verified in Semtech's characterization and exceeds the ±8kV/±15kV minimum requirements for industrial and consumer USB interfaces. The solid-state FET architecture contributes to this high withstand level without degradation after repeated strikes.
Does SMDA05.T require any external components or biasing to operate?
No, SMDA05.T operates autonomously with no external components or biasing required. Its integrated trigger circuit and shunt FET activate instantly upon detection of overvoltage - response time is in the nanosecond range. The device draws zero quiescent current in normal operation and only conducts during transient events, making it ideal for always-on power rails in battery-constrained IoT nodes.
SMDA05.T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- SMDA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 11V
- Current - Peak Pulse (10/1000µs):
- 17A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 400pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SMDA05.T FAQ
1.How can I place an order for SMDA05.T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDA05.T 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 SMDA05.T reliable?
The price and inventory of SMDA05.T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDA05.T is usually 5 days.
3.What payment methods are accepted for SMDA05.T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDA05.T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDA05.T?
SMDA05.T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDA05.T 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 SMDA05.T?
For technical support, including SMDA05.T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDA05.T requirements.
6.How does Aetrix verify that SMDA05.T is sourced from the original manufacturer or authorized distributors?
All SMDA05.T 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 SMDA05.T meets industry standards.
7.What is the process for return or replacement of SMDA05.T?
All SMDA05.T units undergo pre-shipment inspection (PSI). If there is an issue with SMDA05.T, 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 SMDA05.T part is unused and in its original packaging.
Return procedure for SMDA05.T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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