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Semtech Corporation TDS1421PW.C
- Part No.:
- TDS1421PW.C
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
TDS1421PW.C.pdf
- Description:
- SURGESWITCH, 1-LINE 14V EOS PROT
- Quantity:
- Payment:
- Shipping:
Inventory:2,990
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Product details
Overview
TDS1421PW.C from Semtech is a transient diverting suppressor designed for high-energy EOS/ESD protection of 14V VBUS or I/O lines, featuring ±25kV contact / ±30kV air ESD immunity per IEC 61000-4-2, 34A peak pulse current (8/20μs), and 18.5–21.6V clamping at full surge, used in USB Type-C power delivery paths.
For engineers reviewing the TDS1421PW.C datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage stability under 34A surge, dynamic resistance ≤15 mΩ, 122 pF junction capacitance at 14V, DFN 1.6×1.0 mm side-wettable package, and FET-based active shunt architecture for low-voltage rail protection.
Technical Context
The TDS1421PW.C employs a surge-rated MOSFET as its primary protection element, activated by an integrated trigger circuit when transient voltage exceeds 16.0–20.8V breakdown. Unlike passive TVS diodes, it delivers near-constant clamping voltage across its full 34A pulse range due to ultra-low dynamic resistance (15 mΩ).
It operates with reverse stand-off voltage of 14V, leakage <130 nA at VRWM, and maintains stable clamping (18.3–21.6V) from −40°C to +125°C. Its 122 pF capacitance at 1MHz/14V enables use on high-speed VBUS lines without signal integrity compromise.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 14V - Matches standard USB PD VBUS nominal, enabling direct placement without derating. |
| Clamping Voltage | 18.5–21.6V at 34A (8/20μs) - Limits downstream IC stress below 22V during worst-case surge. |
| Dynamic Resistance | 15 mΩ - Ensures minimal IR drop and stable clamping across temperature and current. |
| Junction Capacitance | 122 pF at 14V/1MHz - Low enough for USB Type-C VBUS line without degrading power integrity. |
| ESD Rating | ±25kV contact / ±30kV air (IEC 61000-4-2) - Exceeds industrial ESD immunity requirements. |
| Peak Pulse Power | 734W (8/20μs) - Supports robust protection against repetitive EOS events in IoT edge nodes. |
Pinout & Package
Package: DFN 1.6 × 1.0 × 0.55 mm, 2-lead, side-wettable flanks, RoHS/WEEE compliant, UL 94V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN) | Protection Input | Connected directly to protected VBUS or I/O line; carries full surge current to ground via internal FET. |
| 2 (GND) | Ground Reference | Low-inductance return path to system ground; requires multiple vias for optimal surge dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based active clamping | Replaces passive TVS with voltage-regulated shunt, delivering flat clamping curve up to 34A. |
| Side-wettable flanks | Enables automated optical inspection (AOI) of solder joints on compact 1.6×1.0 mm footprint. |
| Low dynamic resistance | 15 mΩ ensures <0.5V additional drop at 34A, preserving voltage margin for 14V systems. |
| High-temp stability | Clamping voltage drift <±1.5V from −40°C to +125°C, critical for automotive-adjacent IoT deployments. |
Applications
| USB Type-C VBUS Protection | Industrial IoT Power Bus |
|---|---|
Use Scenario: Protecting 14V VBUS lines in USB-C receptacles against hot-plug transients and lightning-induced surges. IC Role / Device Role: Active shunt suppressor placed between VBUS and chassis ground, triggered above 16V. Use Value: Clamps to ≤21.6V at 34A, preventing overvoltage damage to USB PD controllers and load switches. | Use Scenario: Safeguarding 12–15V DC power inputs in battery-powered sensor nodes exposed to field ESD. IC Role / Device Role: Single-line EOS protector on main power rail, replacing bulkier TVS arrays. Use Value: 734W surge rating and −40°C to +125°C operation ensure reliability in uncontrolled outdoor environments. |
| Smartphone Accessory Charging Port | USB-C Docking Station Power Path |
Use Scenario: ESD hardening of portable charger output ports handling repeated cable insertions. IC Role / Device Role: Frontline ESD guard on 14V output rail, rated for >10,000 contact discharges. Use Value: ±25kV contact ESD withstand eliminates failure modes in consumer-facing interfaces. | Use Scenario: Surge suppression on upstream VBUS lines in multi-port docks supporting 100W PD. IC Role / Device Role: Per-port transient diverter ensuring fault isolation between connected devices. Use Value: 122 pF capacitance avoids power delivery negotiation timing violations while sustaining 34A surge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Passive TVS diode; higher clamping (23.2V @ 34A), 10× higher dynamic impedance (~150 mΩ) | Larger SMC package (7.1×6.2 mm); unsuitable for space-constrained USB-C designs | Choose SMAJ14A only if cost sensitivity outweighs board space and clamping performance. |
| SP1003-01UTG | Capacitance-matched (120 pF), but lower surge rating (20A @ 8/20μs) and no IEC 61000-4-5 compliance | Designed for data-line ESD only; not rated for VBUS-level energy dissipation | Select SP1003-01UTG only for low-energy signal-line protection where 34A capability is unnecessary. |
Compared with SMAJ14A and SP1003-01UTG, the TDS1421PW.C uniquely combines 34A IEC 61000-4-5 compliance, 15 mΩ dynamic resistance, and DFN 1.6×1.0 mm packaging-enabling compact, high-fidelity 14V rail protection where clamping precision and thermal stability are critical.
Availability
TDS1421PW.C is available at Aetrix Electronics and suitable for USB Type-C VBUS protection, industrial IoT power bus hardening, and smart charging port ESD mitigation requiring stable component supply and long-term lifecycle support.
Supply support for TDS1421PW.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 conventional TVS diodes in high-energy EOS applications, leveraging FET-based active clamping for superior voltage regulation and thermal resilience in 14V–24V power rails.
FAQ
What is the maximum operating temperature range for the TDS1421PW.C?
The TDS1421PW.C is rated for continuous operation from −40°C to +125°C ambient temperature, with junction and storage temperature extending to −55°C to +150°C. This wide range supports deployment in automotive-adjacent industrial enclosures and outdoor IoT gateways where thermal cycling is severe. The TDS1421PW.C maintains stable clamping voltage and leakage current across this full span, as verified in the datasheet's temperature-dependent characteristic curves.
Does the TDS1421PW.C require external bias or control signals to function?
No, the TDS1421PW.C is fully autonomous and requires no external bias, enable pins, or control logic. It operates passively: when transient voltage exceeds its 16.0–20.8V breakdown threshold, the internal trigger circuit activates the shunt FET, diverting surge current to ground. This self-contained behavior makes the TDS1421PW.C ideal for always-on protection in USB-C VBUS paths and other unmanaged power rails.
How does the clamping voltage of the TDS1421PW.C compare to standard TVS diodes at 34A?
At 34A (8/20μs), the TDS1421PW.C clamps to 18.5–21.6V, significantly lower than typical TVS diodes like SMAJ14A (23.2V). This 2–5V reduction stems from its 15 mΩ dynamic resistance versus ~150 mΩ in passive devices. The tighter clamping window directly protects sensitive 14V-rated PMICs and load switches in USB PD implementations, where even brief overvoltage can cause latch-up or permanent damage.
Is the TDS1421PW.C compatible with lead-free reflow processes?
Yes, the TDS1421PW.C is qualified for lead-free reflow per JEDEC J-STD-020, with a maximum peak temperature of 260°C. Its DFN package uses lead-free terminal finish and UL 94V-0 molding compound. Semtech specifies stencil thickness (0.100–0.125 mm), paste type (Type 4 or finer), and non-solder-mask-defined pads to ensure reliable void-free solder joints-critical for thermal and mechanical robustness in high-surge applications.
Can the TDS1421PW.C be used on data lines such as USB 2.0 differential pairs?
No, the TDS1421PW.C is designed exclusively for single-line power or high-energy I/O protection (e.g., VBUS), not high-speed data lines. Its 122 pF junction capacitance would severely degrade signal integrity on USB 2.0 or USB-C CC/SBU lines. For data-line ESD protection, Semtech offers dedicated low-capacitance solutions like the RCLAMP series. The TDS1421PW.C's architecture targets energy dissipation-not bandwidth preservation.
TDS1421PW.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):
- 14V (Max)
- Voltage - Breakdown (Min):
- 16V
- Voltage - Clamping (Max) @ Ipp:
- 21.6V
- Current - Peak Pulse (10/1000µs):
- 3A
- Power - Peak Pulse:
- 734W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 122pF @ 1MHz
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x1)
TDS1421PW.C FAQ
1.How can I place an order for TDS1421PW.C through Aetrix?
Please submit a Request for Quotation (RFQ) for TDS1421PW.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 TDS1421PW.C reliable?
The price and inventory of TDS1421PW.C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TDS1421PW.C is usually 5 days.
3.What payment methods are accepted for TDS1421PW.C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TDS1421PW.C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TDS1421PW.C?
TDS1421PW.C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TDS1421PW.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 TDS1421PW.C?
For technical support, including TDS1421PW.C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TDS1421PW.C requirements.
6.How does Aetrix verify that TDS1421PW.C is sourced from the original manufacturer or authorized distributors?
All TDS1421PW.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 TDS1421PW.C meets industry standards.
7.What is the process for return or replacement of TDS1421PW.C?
All TDS1421PW.C units undergo pre-shipment inspection (PSI). If there is an issue with TDS1421PW.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 TDS1421PW.C part is unused and in its original packaging.
Return procedure for TDS1421PW.C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TDS1421PW.C Tags
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