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Semtech Corporation SRDA05-6.T
- Part No.:
- SRDA05-6.T
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SRDA05-6.T.pdf
- Description:
- TVS DIODE 5VWM 20VC 8-SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,410
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Product details
Overview
SRDA05-6.T from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS 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 across temperature and current range - deployed in USB Type-C PD input protection and industrial load switch inputs.
For engineers reviewing the SRDA05-6.T datasheet, pinout, applications, or equivalent options, key selection criteria include its constant-clamp FET-based architecture, DFN 1.6×1.6mm 6-lead package with triple parallel input/ground terminals, low 20mΩ dynamic resistance, and 175pF junction capacitance at 22V - critical for maintaining signal integrity while meeting IEC 61000-4-5 surge and IEC 61000-4-4 EFT requirements.
Technical Context
The SRDA05-6.T implements a precision-triggered shunt FET architecture: a voltage-sensing trigger circuit activates a low-RDS(on) MOSFET when transient voltage exceeds ~27.9V breakdown, enabling near-constant clamping independent of peak current magnitude or operating temperature. Unlike conventional TVS diodes, its clamping voltage remains stable from −40°C to +125°C and across 24–40A surge currents.
This architecture delivers 1120W peak pulse power handling (8/20μs), supports unsymmetrical line protection per IEC 61000-4-5 (±1kV, RS=42Ω), and achieves ±4kV EFT immunity (IEC 61000-4-4, 5/50ns). Its solid-state design eliminates junction thermal derating limitations inherent in pn-junction TVS devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 22V - defines maximum continuous DC bus voltage before leakage or conduction begins. |
| Clamping Voltage | 27.5–28V at 40A (8/20μs + 1.2/50μs combo wave, RS=2Ω) - ensures protected ICs (e.g., USB PD controllers) remain below damage threshold during surge events. |
| Peak Pulse Current | 40A (8/20μs) - meets industrial surge immunity standards including IEC 61000-4-5 Level 3/4. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds automotive and industrial ESD robustness requirements without external shielding. |
| Dynamic Resistance | 20mΩ (8/20μs, 1–40A range) - enables flat clamping response and minimizes voltage overshoot during fast transients. |
| Junction Capacitance | 175pF at 22V, 1MHz - compatible with medium-speed power/data lines (e.g., USB PD VBUS, load switch inputs) without signal distortion. |
| Operating Temp. | −40°C to +125°C - supports deployment in extended-temperature industrial and automotive under-hood environments. |
Pinout & Package
SRDA05-6.T is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad not required (energy dissipated in silicon). All six terminals are surface-mount; pins 1–3 form a common ground plane, pins 4–6 form a common input node - both groups must be fully connected to maximize surge current capability and minimize parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return path for surge current; all three pins must be tied to PCB ground plane with multiple vias to reduce impedance. |
| 4, 5, 6 | IN | Parallel-connected input node for protected line (e.g., VBUS or load switch input); full connection ensures rated 40A handling and uniform current sharing. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping | Replaces traditional TVS diode with low-RDS(on) shunt FET, delivering flat clamping voltage across 24–40A and −40°C to +125°C. |
| Triple-terminal input & ground | Three parallel IN pins (4–6) and three parallel GND pins (1–3) reduce trace inductance and distribute surge current, enabling full 40A rating without layout compromise. |
| Stable dynamic resistance | 20mΩ over full surge current range ensures minimal voltage rise during fast transients - critical for protecting sensitive 22V-rated controllers. |
| High-energy ESD/EFT immunity | ±30kV contact/air ESD (IEC 61000-4-2) and ±4kV EFT (IEC 61000-4-4) allow single-device protection without secondary filtering in space-constrained IoT and USB-C designs. |
| Small-footprint DFN | 1.6mm × 1.6mm footprint saves >50% board area vs. comparable SO-8 or SOT-23 TVS solutions - ideal for ultra-compact USB PD adapters and portable industrial sensors. |
Applications
| USB Type-C Power Delivery Input Protection | Industrial Load Switch Input Protection |
|---|---|
Use Scenario: Protecting the 20–22V VBUS line of USB-C ports implementing Power Delivery negotiation against lightning-induced surges and connector ESD. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at the Type-C receptacle, clamping transients before they reach the PD controller and buck-boost converter. Use Value: Maintains clamping at ≤28V across temperature and 40A surge - preventing latch-up or gate oxide damage in 22V-tolerant PD ICs where conventional TVS would exceed safe voltage margins. |
Use Scenario: Safeguarding the input of industrial-grade load switches (e.g., HS2950P) used in remote meters, robotics, and programmable logic controllers against 1kV/42Ω surges and ESD. IC Role / Device Role / Timing Role: Primary front-end protector on the VIN rail, absorbing energy that would otherwise overstress the internal FET of the load switch during EOS events. Use Value: Clamps at 27.5–28V regardless of ambient temperature - ensuring consistent protection margin for load switches rated up to 30V, eliminating thermal derating uncertainty. |
| IoT Edge Node Power Bus Protection | Storage Device 12–24V Rail Protection |
Use Scenario: Securing the main power input of battery-backed wireless sensor nodes exposed to field ESD and induced surges in smart building or agricultural monitoring systems. IC Role / Device Role / Timing Role: Solid-state EOS protector on the primary 22V supply rail, replacing bulkier MOV+TVS stacks while meeting IEC 61000-4-5 Level 4 immunity. Use Value: 175pF capacitance avoids signal integrity issues on shared power rails feeding RF modules and microcontrollers - unlike high-capacitance polymer TVS alternatives. |
Use Scenario: Protecting SATA, NVMe, or SAS storage controller power inputs in enterprise SSDs and RAID enclosures subjected to hot-plug transients and system-level surges. IC Role / Device Role / Timing Role: High-reliability transient suppressor on the 12V or 24V auxiliary power rail, placed adjacent to the connector to minimize coupling into data lanes. Use Value: Triple-terminal layout allows direct placement at edge connector with minimal trace length - reducing inductive overshoot and ensuring <10ns response to 8/20μs 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 | Same manufacturer, identical electrical specs and package; SRDA05-6.T is Semtech's alternate marking for TDS2211P per official ordering documentation. | No functional difference - used interchangeably in BOMs for USB-C PD and industrial load switch designs. | Select SRDA05-6.T when sourcing from distributors listing this part number; verify date code and reel packaging match production requirements. |
| uClamp2411ZA | 24V working voltage, lower 24A IPP rating, smaller 0.65mm × 0.65mm 2-pin DFN package, higher 24V clamping (~33V). | Targeted at CC/SBU lines in USB-C, not main VBUS; insufficient for 40A surge or 22V bus protection. | Not a functional replacement - use only for auxiliary signal-line protection where lower energy and voltage margin apply. |
Compared with TDS2211P, SRDA05-6.T is an identical device with no electrical or mechanical distinction; compared with uClamp2411ZA, SRDA05-6.T provides 67% higher surge current rating, 5V lower clamping, and triple-terminal layout optimized for high-power rail protection - making it suitable for primary bus defense where uClamp2411ZA is limited to low-energy signal lines.
Availability
SRDA05-6.T is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch inputs, and IoT edge node power bus protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SRDA05-6.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 analog and mixed-signal ICs for precision sensing, protection, and connectivity.
The SRDA05-6.T belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 22V power rail protection with superior clamping stability and temperature independence.
FAQ
What is the exact relationship between SRDA05-6.T and TDS2211P?
SRDA05-6.T is Semtech's alternate orderable part number for the TDS2211P device. Both share identical die, electrical specifications, DFN 1.6×1.6mm 6-lead package, pinout, and marking code "T22". The SRDA05-6.T designation appears on certain distributor reels and legacy ordering channels, but the SRDA05-6.T and TDS2211P are functionally and physically interchangeable in all applications requiring the SRDA05-6.T.
Does SRDA05-6.T require a thermal pad on the PCB?
No, SRDA05-6.T does not require a thermal pad. Its FET-based architecture dissipates surge energy in the silicon channel rather than at a PN junction, eliminating the need for enhanced thermal conduction. The datasheet explicitly states "no thermal pad is needed", and recommended layout focuses on low-inductance grounding via multiple vias to pins 1–3 - not thermal relief patterns under the exposed pad.
Can SRDA05-6.T protect bidirectional signal lines like USB DP/DM?
No, SRDA05-6.T is designed exclusively for unidirectional power or I/O line protection (e.g., VBUS, load switch input). Its pin configuration - three dedicated IN pins (4–6) and three dedicated GND pins (1–3) - lacks symmetrical bidirectional clamping. For DP/DM lines, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (0.25pF), which SRDA05-6.T cannot substitute due to its 175pF capacitance and asymmetric terminal structure.
What is the significance of the triple-terminal (3×IN, 3×GND) layout in SRDA05-6.T?
The triple-terminal layout reduces effective series inductance by distributing surge current across three parallel paths, enabling full 40A (8/20μs) rating without voltage overshoot. It also lowers impedance to ground - critical for maintaining clamping performance during sub-10ns ESD events. Layout guidelines require connecting all six pins; using fewer pins degrades surge capability and violates the SRDA05-6.T's absolute maximum ratings.
How does SRDA05-6.T's clamping behavior differ from standard TVS diodes under temperature variation?
Standard TVS diodes exhibit rising clamping voltage with increasing temperature due to positive temperature coefficient of dynamic resistance. In contrast, SRDA05-6.T maintains 27.5–28V clamping from −40°C to +125°C because its FET-based clamping relies on a precision trigger circuit whose breakdown voltage has minimal thermal drift - confirmed by datasheet graphs showing flat clamping vs. temperature curves across the full operating range of SRDA05-6.T.
SRDA05-6.T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- RailClamp®, SRDA
- Packaging:
- Tube
- Product Status:
- Obsolete
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 6
- 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:
- 8pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
SRDA05-6.T FAQ
1.How can I place an order for SRDA05-6.T through Aetrix?
Please submit a Request for Quotation (RFQ) for SRDA05-6.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 SRDA05-6.T reliable?
The price and inventory of SRDA05-6.T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRDA05-6.T is usually 5 days.
3.What payment methods are accepted for SRDA05-6.T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRDA05-6.T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRDA05-6.T?
SRDA05-6.T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRDA05-6.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 SRDA05-6.T?
For technical support, including SRDA05-6.T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRDA05-6.T requirements.
6.How does Aetrix verify that SRDA05-6.T is sourced from the original manufacturer or authorized distributors?
All SRDA05-6.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 SRDA05-6.T meets industry standards.
7.What is the process for return or replacement of SRDA05-6.T?
All SRDA05-6.T units undergo pre-shipment inspection (PSI). If there is an issue with SRDA05-6.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 SRDA05-6.T part is unused and in its original packaging.
Return procedure for SRDA05-6.T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRDA05-6.T Tags
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