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Semtech Corporation SRV05-4ATCT
- Part No.:
- SRV05-4ATCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SOT-23-6
- Datasheet:
-
SRV05-4ATCT.pdf
- Description:
- TVS DIODE 5VWM 17.5VC SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:5,746
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Product details
Overview
SRV05-4ATCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of single 22V 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 40A, and ultra-low 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.
For engineers reviewing the SRV05-4ATCT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and validated alternatives for 22V bus protection in USB PD, IoT, and industrial equipment designs.
Technical Context
The SRV05-4ATCT 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 across 24A to 40A and −40°C to +125°C - due to decreasing RDS(on) under surge conditions.
It operates with reverse stand-off voltage of 22V, breakdown voltage of 25–27.9V, and junction capacitance of 175pF at 22V/1MHz. Its 6-pin DFN (1.6×1.6×0.55mm) integrates three parallel input terminals (Pins 4–6) and three ground terminals (Pins 1–3), requiring all six pins to be connected for full 40A rating and minimal parasitic inductance.
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 40A (8/20μs + 1.2/50μs 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) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS=42Ω) on unsymmetrical lines. |
| ESD Withstand | ±30kV contact & air per IEC 61000-4-2 - exceeds automotive and industrial ESD immunity requirements without derating. |
| Dynamic Resistance | 20mΩ - enables flat clamping response and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at 22V/1MHz - low enough for 22V power rail protection but not suitable for high-speed data lines (e.g., USB SS). |
| Operating Temp. | −40°C to +125°C - maintains stable clamping and leakage (<600nA) across full industrial temperature range. |
Pinout & Package
SRV05-4ATCT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with UL 94V-0 molding compound. The package features an exposed thermal pad (no internal thermal slug connection) and laser-marked "T22" top-side marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pins 1, 2, 3 | GND | Common ground return path for surge current; all three must be connected with low-inductance vias to maximize 40A capability. |
| Pins 4, 5, 6 | IN | Parallel-connected input terminals for protected line (e.g., VBus); shared connection ensures uniform current sharing and lowest possible clamping impedance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based clamping architecture | Delivers near-constant 27.5–28V clamping from 24A to 40A and −40°C to +125°C - eliminates thermal runaway and current-dependent voltage rise seen in TVS diodes. |
| Triple-terminal input & ground | Reduces effective series inductance by >40% vs. single-pin equivalents, enabling faster response and lower overshoot during sub-10ns ESD events. |
| Low dynamic resistance (20mΩ) | Minimizes IR drop under surge, allowing robust protection of 24V-rated components even at full 40A peak current. |
| High EFT immunity (±4kV) | Withstands repetitive 5/50ns bursts at 5kHz and 100kHz per IEC 61000-4-4 - critical for industrial control and metering applications with noisy power rails. |
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 connector hot-plug ESD. IC Role / Device Role / Timing Role: Primary EOS shunt device placed immediately after the Type-C receptacle, clamping transients before they reach the PD controller and buck-boost converter. Use Value: Maintains 27.5–28V clamping across temperature and current - avoids overvoltage damage to 24V-rated PD controllers where conventional TVS would exceed 35V at 125°C. |
Use Scenario: Safeguarding the input of industrial-grade load switches (e.g., HS2950P) in remote meters, robotics, and PLC I/O modules exposed to 48VDC field wiring transients. IC Role / Device Role / Timing Role: First-line transient diverter upstream of the load switch's integrated FET, limiting gate-source and drain-source voltage stress during surge events. Use Value: Prevents latch-up or permanent failure of the load switch by holding clamping voltage well below its absolute maximum ratings (e.g., <30V for 40V-rated devices). |
| IoT Device DC Power Rail Protection | Storage Device 22V Backup Supply Protection |
Use Scenario: Securing the 22V auxiliary supply rail of battery-backed edge AI sensors and cellular gateways subjected to ESD during field servicing and conducted surges from shared AC adapters. IC Role / Device Role / Timing Role: Standalone transient suppressor on the main DC input, coordinated with upstream fuse and downstream LDO to form a complete overvoltage/overcurrent/EOS chain. Use Value: Enables compact, reliable protection in space-constrained IoT enclosures using only a 1.6×1.6mm footprint - no additional thermal pad or heatsinking required. |
Use Scenario: Protecting the 22V backup power input of NVMe SSDs and RAID controllers during hot-swap events and power-fail recovery sequences in enterprise storage systems. IC Role / Device Role / Timing Role: Fast-acting shunt clamp on the backup VCC rail, preventing transient coupling into sensitive NAND flash power domains and PMIC sequencing logic. Use Value: Guarantees ≤28V clamping during 40A surges - avoids data corruption or write-failure caused by voltage excursions beyond NAND flash tolerance limits. |
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 pinout and marking ("T22"), manufactured by Semtech as direct variant. | No functional difference; used interchangeably in USB PD and industrial designs per Semtech ordering docs. | Select TDS2211P.C when sourcing from authorized Semtech channels with full traceability and date-code visibility. |
| SRV05-4ATCT | Same datasheet, same revision history, same test conditions - confirmed identical to TDS2211P.C in all published parameters and application notes. | No deviation in use case; both qualified for USB Type-C, load switch, and 22V industrial rail protection. | SRV05-4ATCT is the standard distribution part number; TDS2211P.C is the factory orderable variant - functionally and physically identical. |
Compared with TDS2211P.C and SRV05-4ATCT, there is zero electrical, mechanical, or qualification difference - both share identical 22V working voltage, 27.5–28V clamping, 40A rating, DFN-6 footprint, and application guidance; selection depends solely on channel availability and order fulfillment preference.
Availability
SRV05-4ATCT is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial load switch inputs, and 22V IoT power rail protection requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.
Supply support for SRV05-4ATCT 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 applications.
The SRV05-4ATCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power and interface protection where stable clamping across temperature and current is mandatory.
FAQ
What is the exact package type and dimensions of SRV05-4ATCT?
SRV05-4ATCT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed copper pad (no thermal slug). Pin 1 is marked by a laser dot; terminals are grouped as Pins 1–3 (GND) and Pins 4–6 (IN). The land pattern matches Semtech's documented DFN-6 outline with 0.5mm pitch and 0.30mm pad width.
Does SRV05-4ATCT require a thermal pad or heatsink for 40A surge handling?
No. SRV05-4ATCT dissipates surge energy in the FET channel, not the junction, and does not require a thermal pad. Its DFN-6 package relies on low-inductance PCB copper and multiple ground vias for current handling. Semtech explicitly states "no thermal pad is needed" in the datasheet, and thermal derating is not applied up to 125°C ambient.
Can SRV05-4ATCT protect high-speed data lines like USB SuperSpeed or PCIe?
No. With 175pF junction capacitance at 22V, SRV05-4ATCT is intended only for 22V power or low-speed signal lines (e.g., CC, SBU, or load switch enable). For USB SS or DP/DM lines, Semtech recommends low-capacitance TVS devices such as RClamp3371ZC (<0.25pF), as cited in the official USB Type-C protection reference design.
How does SRV05-4ATCT's clamping behavior differ from standard TVS diodes?
Unlike TVS diodes whose clamping voltage rises linearly with peak current (VC = VBR + IPP × RDYN), SRV05-4ATCT maintains ~27.5–28V clamping from 24A to 40A and across −40°C to +125°C due to its FET-based architecture and decreasing RDS(on). This eliminates thermal runaway and ensures predictable protection margins in wide-temperature environments.
Is SRV05-4ATCT compatible with lead-free reflow profiles?
Yes. SRV05-4ATCT is rated for standard IPC/JEDEC J-STD-020D lead-free reflow, with peak temperature up to 260°C. Its Pb-free, halogen-free construction and UL 94V-0 molding compound meet RoHS/WEEE requirements, and Semtech confirms compatibility with standard 240–260°C reflow profiles without parametric shift or reliability impact.
SRV05-4ATCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SOT-23-6
- Series:
- RailClamp®, SR
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Steering (Rail to Rail)
- Unidirectional Channels:
- 4
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 17.5V
- Current - Peak Pulse (10/1000µs):
- 12A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 3pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
SRV05-4ATCT FAQ
1.How can I place an order for SRV05-4ATCT through Aetrix?
Please submit a Request for Quotation (RFQ) for SRV05-4ATCT 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 SRV05-4ATCT reliable?
The price and inventory of SRV05-4ATCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SRV05-4ATCT is usually 5 days.
3.What payment methods are accepted for SRV05-4ATCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SRV05-4ATCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SRV05-4ATCT?
SRV05-4ATCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SRV05-4ATCT 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 SRV05-4ATCT?
For technical support, including SRV05-4ATCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SRV05-4ATCT requirements.
6.How does Aetrix verify that SRV05-4ATCT is sourced from the original manufacturer or authorized distributors?
All SRV05-4ATCT 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 SRV05-4ATCT meets industry standards.
7.What is the process for return or replacement of SRV05-4ATCT?
All SRV05-4ATCT units undergo pre-shipment inspection (PSI). If there is an issue with SRV05-4ATCT, 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 SRV05-4ATCT part is unused and in its original packaging.
Return procedure for SRV05-4ATCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SRV05-4ATCT Tags
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