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Semtech Corporation TDS0521PW.C
- Part No.:
- TDS0521PW.C
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
TDS0521PW.C.pdf
- Description:
- SURGESWITCH, 1-LINE 5V EOS PROTE
- Quantity:
- Payment:
- Shipping:
Inventory:2,865
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Product details
Overview
TDS0521PW.C from Semtech is a transient diverting suppressor designed for 5V EOS/ESD protection of single I/O or power lines, featuring ±30kV IEC 61000-4-2 contact/air ESD rating, 40A (8/20μs) peak pulse current capability, and 8.7–9.8V clamping voltage at 40A. It uses a surge-rated FET as the main protection element and is optimized for USB Type-C VBUS lines and IoT device power rails.
For engineers reviewing the TDS0521PW.C datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 40A surge, dynamic resistance of 16 mΩ, DFN 1.6×1.0 mm side-wettable package compatibility with automated optical inspection, and 159 pF junction capacitance at 5V bias.
Technical Context
The TDS0521PW.C implements a triggered shunt-FET architecture: during an EOS event, a dedicated trigger circuit activates a low-RON power FET to divert transient current to ground. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across the full 8–40A IEC 61000-4-5 surge range due to sub-20 mΩ dynamic resistance.
It operates within –40°C to +125°C ambient, maintains <75 nA reverse leakage at 5V, and delivers stable 6.9–9.0V breakdown voltage over temperature. Its 159 pF capacitance at 1 MHz and 5V bias enables use on high-speed 5V buses without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 5 V - Matches standard USB Type-C VBUS and 5V logic rail systems without derating. |
| Clamping Voltage | 8.7–9.8 V at 40A (8/20μs) - Limits downstream IC stress below 10 V during worst-case industrial surges. |
| Dynamic Resistance | 16 mΩ - Enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 159 pF at 5V, 1MHz - Low enough for USB 2.0 data line integration; compatible with 480 Mbps signaling. |
| ESD Rating | ±30 kV contact & air (IEC 61000-4-2) - Exceeds Level 4 immunity requirements for consumer and industrial end equipment. |
| Peak Pulse Power | 412 W (8/20μs) - Supports sustained energy dissipation in 2 kV IEC 61000-4-5 surge events with 42 Ω source impedance. |
| Package Dimensions | DFN 1.6 × 1.0 × 0.55 mm - Enables ultra-compact placement adjacent to connectors with side-wettable flanks for AOI verification. |
Pinout & Package
Package: DFN 1.6 × 1.0 × 0.55 mm, 2-lead, side-wettable flanks, Pb-free/RoHS-compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Protection Input | Connects to protected 5V bus (e.g., USB Type-C VBUS); carries full surge current during clamping. |
| 2 (GND) | Ground Reference | Low-inductance return path to system ground; requires multiple vias per layout guidelines to minimize impedance. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces avalanche diode clamping with active MOSFET switching for stable, low-RDYN conduction. |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints on compact DFN footprint without X-ray. |
| Temperature-stable clamping | Clamping voltage variation <±0.5 V from –40°C to +125°C ensures consistent protection across operating range. |
| Low leakage at VRWM | Max 75 nA at 5V reverse bias prevents power loss in always-on 5V supply monitoring circuits. |
| Surge-rated construction | Validated for 2 kV IEC 61000-4-5 (1.2/50 μs, RS = 42 Ω), supporting industrial-grade power rail hardening. |
Applications
| USB Type-C VBUS Protection | IoT Device Power Rail Protection |
|---|---|
Use Scenario: Protecting 5V VBUS lines in USB Type-C receptacles against hot-plug transients and ESD events during cable insertion. IC Role / Device Role / Timing Role: Primary shunt protector placed between VBUS and chassis/system ground, activated within nanoseconds of overvoltage detection. Use Value: 8.7–9.8 V clamping at 40A prevents damage to USB PD controllers and port power switches rated for ≤12 V absolute maximum. | Use Scenario: Securing 5V supply inputs of battery-powered IoT sensors exposed to electrostatic discharge in uncontrolled environments. IC Role / Device Role / Timing Role: Standalone EOS/ESD suppressor on main power entry point, operating continuously across –40°C to +125°C ambient. Use Value: ±30 kV ESD rating and <75 nA leakage ensure long-term reliability and minimal standby current drain in energy-constrained designs. |
| Industrial Control I/O Protection | USB 2.0 Data Line Surge Suppression |
Use Scenario: Hardening 5V auxiliary power lines feeding isolated digital I/O modules in PLC backplanes subject to 2 kV IEC 61000-4-5 surges. IC Role / Device Role / Timing Role: High-energy transient diverter placed upstream of LDO regulators and level translators on control-side 5V rails. Use Value: 412 W peak pulse power and stable clamping enable compliance with industrial surge immunity standards without derating. | Use Scenario: Adding robust ESD protection to USB 2.0 D+ and D– lines where low capacitance is critical to maintain signal integrity. IC Role / Device Role / Timing Role: Bidirectional protection device connected across differential pair, leveraging symmetric FET structure for balanced clamping. Use Value: 159 pF capacitance at 5V bias avoids signal distortion at 480 Mbps while delivering ±30 kV ESD immunity per line. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Standard unidirectional TVS diode; 9.2 V clamping at 43.3 A (8/20μs); 1000 pF capacitance; no FET-based regulation. | Limited to lower-speed, non-capacitance-sensitive applications; lacks side-wettable flanks and temperature-stable clamping. | Select when cost sensitivity outweighs clamping precision and board space constraints. |
| SP1003-01UTG | Bi-directional TVS array; 15 V clamping at 20 A (8/20μs); 0.6 pF typical capacitance; rated for 5 V working voltage. | Better for ultra-low-capacitance data lines but cannot sustain 40A surge; lower energy handling (150 W vs. 412 W). | Prefer for high-frequency signal lines where sub-1 pF capacitance is mandatory, not for VBUS-level power rail protection. |
Compared with SMAJ5.0A and SP1003-01UTG, the TDS0521PW.C uniquely combines 40A surge capability, sub-10V clamping, and 159 pF capacitance in a 1.6×1.0 mm DFN-making it the only option that simultaneously satisfies USB Type-C VBUS energy, voltage, and layout requirements.
Availability
TDS0521PW.C is available at Aetrix Electronics and suitable for USB Type-C interface design, IoT edge node power management, and industrial control system VBUS hardening requiring stable component supply and full traceability.
Supply support for TDS0521PW.C 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 TDS series was developed to replace traditional TVS diodes in high-energy EOS applications, targeting USB power delivery, industrial automation, and battery-powered edge devices needing reliable, low-clamp, thermally stable protection.
FAQ
What is the primary protection mechanism used in the TDS0521PW.C?
The TDS0521PW.C employs a surge-rated FET as its core protection element. When transient voltage exceeds the device's breakdown threshold (~6.9–9.0 V), an integrated trigger circuit activates a low-RON shunt FET, diverting surge current to ground. This architecture yields near-constant clamping voltage and 16 mΩ dynamic resistance-distinct from passive TVS diode behavior. The TDS0521PW.C achieves this without external bias or control signals.
Does the TDS0521PW.C support bidirectional ESD protection?
Yes, the TDS0521PW.C provides symmetrical ±30 kV ESD protection per IEC 61000-4-2 (contact and air) in both polarities. Its internal FET-based topology and pin configuration (IN-to-GND) allow it to clamp positive and negative transients equally, making it suitable for DC-biased lines like USB VBUS. The TDS0521PW.C does not require polarity-specific orientation during placement.
What is the recommended PCB layout for optimal performance of the TDS0521PW.C?
For optimal TDS0521PW.C performance, connect Pin 1 (IN) directly to the protected line with minimal trace length, and route Pin 2 (GND) to a solid ground plane using ≥2 thermal vias. Follow Semtech's land pattern: 0.625 mm × 0.600 mm pads with 0.100–0.125 mm stencil thickness and Type 4 solder paste. Avoid solder mask defined pads; use OSP or NiAu finish. The TDS0521PW.C side-wettable flanks require proper stencil aperture design for AOI visibility.
Can the TDS0521PW.C be used on USB 2.0 data lines (D+ and D–)?
Yes-the TDS0521PW.C's 159 pF junction capacitance at 5V bias and ±30 kV ESD rating make it viable for USB 2.0 data line protection when placed differentially across D+/D–. However, its 5V working voltage limits use to 5V-tolerant PHYs; verify receiver input tolerance margins. For higher-speed interfaces (e.g., USB 3.x), lower-capacitance alternatives are preferred. The TDS0521PW.C remains ideal for VBUS, not high-frequency differential pairs.
How does the TDS0521PW.C compare to standard TVS diodes in surge response?
The TDS0521PW.C delivers significantly flatter clamping voltage versus peak current than standard TVS diodes due to its FET-based architecture and 16 mΩ dynamic resistance. At 40A (8/20μs), its clamping stays within 8.7–9.8 V, whereas typical 5V TVS diodes exceed 12 V. This reduces stress on downstream 5V ICs. The TDS0521PW.C also exhibits superior temperature stability and lower leakage (<75 nA), distinguishing it from avalanche-junction TVS solutions.
TDS0521PW.C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 2-UDFN
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6.9V
- Voltage - Clamping (Max) @ Ipp:
- 9.8V
- Current - Peak Pulse (10/1000µs):
- 8A
- Power - Peak Pulse:
- 412W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 159pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x1)
TDS0521PW.C FAQ
1.How can I place an order for TDS0521PW.C through Aetrix?
Please submit a Request for Quotation (RFQ) for TDS0521PW.C 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 TDS0521PW.C reliable?
The price and inventory of TDS0521PW.C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDS0521PW.C is usually 5 days.
3.What payment methods are accepted for TDS0521PW.C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDS0521PW.C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDS0521PW.C?
TDS0521PW.C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDS0521PW.C 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 TDS0521PW.C?
For technical support, including TDS0521PW.C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDS0521PW.C requirements.
6.How does Aetrix verify that TDS0521PW.C is sourced from the original manufacturer or authorized distributors?
All TDS0521PW.C 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 TDS0521PW.C meets industry standards.
7.What is the process for return or replacement of TDS0521PW.C?
All TDS0521PW.C units undergo pre-shipment inspection (PSI). If there is an issue with TDS0521PW.C, 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 TDS0521PW.C part is unused and in its original packaging.
Return procedure for TDS0521PW.C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDS0521PW.C Tags
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