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Semtech Corporation USC1105
- Part No.:
- USC1105
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
USC1105.pdf
- Description:
- DIODE GEN PURP 300V 2.1A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:6,736
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Product details
Overview
TDS2211P from Semtech is a transient diverting suppressor designed for high-energy EOS protection of 22V-rated 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 20mΩ dynamic resistance - deployed in USB Type-C PD bus protection and industrial load switch input stages.
For engineers reviewing the TDS2211P datasheet, pinout, applications, or equivalent options, key selection criteria include clamping stability across temperature and current, low dynamic resistance for flat VC vs. IPP response, DFN-6 package layout constraints, and compatibility with 22V working voltage systems requiring robust surge immunity per IEC 61000-4-5.
Technical Context
The TDS2211P uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown threshold - enabling near-constant clamping voltage independent of peak pulse current magnitude. Its operation replaces conventional TVS diode behavior (VC = VBR + IPP × RDYN) with a voltage-controlled shunt mechanism.
Clamping remains stable from −40°C to +125°C due to FET RDS(on) reduction under surge, delivering 27.5–28V at both 24A and 40A (1.2/50μs + 8/20μs combination waveform, RS = 2Ω), unlike standard TVS devices whose VC rises linearly with IPP and temperature.
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 22V-rated ICs (e.g., USB PD controllers) remain below damage threshold during surge. |
| Peak Pulse Current | 40A (tp = 8/20μs) - supports compliance with IEC 61000-4-5 Level 4 (±1kV, RS = 42Ω, CS = 0.5μF) on unsymmetrical lines. |
| ESD Withstand | ±30kV contact & air (IEC 61000-4-2) - exceeds industrial and consumer interface ESD requirements without degradation. |
| Dynamic Resistance | 20mΩ (measured 1–40A, tp = 8/20μs) - enables flat clamping curve and minimizes voltage overshoot during fast-rising transients. |
| Junction Capacitance | 175pF at VR = 22V, f = 1MHz - suitable for power/bus line protection; not intended for high-speed data lines. |
| Reverse Leakage | 130–600nA at 22V - negligible power loss in always-on 22V supply rail applications. |
Pinout & Package
Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, Pb-free, RoHS/WEEE compliant, UL 94V-0 molding compound, marked "T22" + date code.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground connection - all three pins must be connected to maximize surge current path and minimize parasitic inductance. |
| 4, 5, 6 | IN | Protected line input - all three pins connect in parallel to the same 22V bus or power line; required for full 40A rating. |
Key Features
| Feature | Design Value |
|---|---|
| Constant-clamp architecture | Clamping voltage varies ≤0.5V across full 1–40A surge range and −40°C to +125°C - eliminates thermal derating design margins. |
| FET-based shunt topology | Replaces junction-limited TVS with low-RDS(on) MOSFET - dissipates energy in channel rather than PN junction, enabling higher IPP and stable TJ. |
| High-energy surge handling | 1120W peak pulse power (8/20μs) - supports repeated lightning-induced surges in industrial equipment and remote meters. |
| Low-capacitance ground path | 175pF total capacitance - avoids signal integrity issues on 22V DC rails while maintaining fast transient response. |
| DFN space optimization | 1.6mm × 1.6mm footprint - reduces PCB area by >50% versus SO-8 or SOT-23 TVS alternatives rated for equivalent surge energy. |
Applications
| USB Type-C Power Delivery Bus Protection | Industrial Load Switch Input Protection |
|---|---|
|
Use Scenario: Protecting VBUS lines in USB Type-C ports supporting up to 20V PD negotiation, exposed to ESD and system-level surges. IC Role / Device Role / Timing Role: Primary EOS shunt suppressor placed between connector and PD controller or load switch input. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents overvoltage damage to 22V-tolerant PD controllers where standard TVS would exceed safe limits. |
Use Scenario: Safeguarding enable or input terminals of industrial-grade load switches (e.g., HS2950P) against lightning-induced surges in remote metering or robotics. IC Role / Device Role / Timing Role: Front-end transient clamp on VIN or EN pin, limiting voltage seen by internal FET gate oxide and control circuitry. Use Value: Clamps below 28V across full temperature and current range - avoids latch-up or gate rupture in sensitive e-fuse ICs operating near 22V absolute max ratings. |
| IoT Edge Node Power Rail Protection | Storage Device 22V Backup Supply Protection |
|
Use Scenario: Securing 22V auxiliary power inputs in battery-backed IoT gateways subjected to EFT bursts and contact ESD in factory environments. IC Role / Device Role / Timing Role: Standalone transient suppressor on main DC input rail upstream of DC-DC converters and PMICs. Use Value: ±4kV EFT immunity (IEC 61000-4-4) and ±30kV ESD withstand ensure uninterrupted operation during repetitive noise events without parameter drift. |
Use Scenario: Protecting 22V supercapacitor or LiFePO₄ backup supplies in enterprise SSDs and NAS enclosures against hot-plug transients and board-level coupling. IC Role / Device Role / Timing Role: Bidirectional clamping device on backup VCC rail, conducting surge current to chassis ground during fault conditions. Use Value: 20mΩ dynamic resistance ensures minimal IR drop during 40A surge - preserves hold-up time and avoids brownout in storage controller power domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Standard unidirectional TVS diode; 35.1V min clamping at 12.5A (8/20μs); VC rises to ~42V at 40A; 1000W PPK rating. | Larger SO-201 package; no constant-clamp behavior; requires derating above 85°C. | Lower cost for non-critical 22V rails where flat VC is not required and surge duty cycle is infrequent. |
| TPD2E007DRYR | Low-capacitance (3.5pF) dual-channel ESD protector; 22V VRWM; 12A IPP; 28V clamping at 8A - not rated for 40A or IEC 61000-4-5. | Designed for high-speed data lines (USB 2.0, HDMI); lacks power-line surge capability. | Only suitable for secondary ESD protection on CC/SBU or DP/DM lines - cannot replace TDS2211P on VBUS. |
Compared with SMAJ22A and TPD2E007DRYR, the TDS2211P uniquely delivers stable 27.5–28V clamping across 1–40A and −40°C to +125°C, making it the only option qualified for mission-critical 22V power rail surge protection in USB PD, industrial load switches, and backup power systems.
Availability
TDS2211P is available at Aetrix Electronics and suitable for USB Type-C PD implementations, industrial load switch protection, and 22V IoT power rail designs requiring stable component supply with guaranteed long-term continuity.
Supply support for TDS2211P 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 semiconductor company specializing in analog and mixed-signal semiconductors for power management, protection, and signal integrity solutions.
The TDS family was developed to overcome limitations of traditional TVS diodes in high-reliability power rail protection - delivering constant clamping, superior thermal stability, and compact DFN packaging for next-generation USB, industrial, and storage applications.
FAQ
What is the maximum continuous operating voltage for the TDS2211P?
The TDS2211P has a reverse stand-off voltage (VRWM) of 22V, meaning it can continuously block up to 22V DC without significant leakage or conduction. This makes the TDS2211P suitable for protecting 22V nominal power rails such as USB PD VBUS, industrial 24V-derived supplies, and backup battery circuits - provided transient events do not exceed its clamping and surge ratings.
How does the TDS2211P achieve constant clamping voltage across varying surge currents?
The TDS2211P achieves constant clamping via a surge-rated FET shunt architecture: a precision trigger circuit activates the FET when transient voltage exceeds threshold, and the FET's RDS(on) decreases under high current, resulting in near-fixed voltage drop (~27.5–28V) from 1A to 40A. Unlike TVS diodes governed by VC = VBR + IPP × RDYN, the TDS2211P's clamping remains stable across its full rated current and temperature range.
Can the TDS2211P be used on high-speed data lines like USB 3.2 or PCIe?
No - the TDS2211P is not suitable for high-speed data lines. Its 175pF junction capacitance would severely degrade signal integrity on differential pairs operating above 100MHz. The TDS2211P is specifically designed for 22V power/bus line protection. For USB 3.2 or PCIe lanes, low-capacitance ESD suppressors such as RClamp3371ZC (<0.25pF) must be used instead of the TDS2211P.
What is the recommended PCB layout for optimal performance of the TDS2211P?
Place the TDS2211P as close as possible to the protected connector. Connect all three IN pins (4, 5, 6) together with a short, wide trace to the protected line, and tie all three GND pins (1, 2, 3) directly to a solid ground plane using multiple vias. Avoid thermal pads - energy is dissipated in the FET channel, not the die attach. This layout minimizes parasitic inductance and ensures full 40A surge capability for the TDS2211P.
Is the TDS2211P compatible with lead-free reflow processes?
Yes - the TDS2211P is fully compatible with standard lead-free reflow profiles. It features a Pb-free, halogen-free, RoHS/WEEE-compliant construction with a UL 94V-0 molding compound and lead-free terminal finish. The device is rated for junction temperatures up to +150°C and supports JEDEC J-STD-020 moisture sensitivity level (MSL) 1, allowing unlimited floor life before assembly.
USC1105 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Bulk
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 300 V
- Current - Average Rectified (Io):
- 2.1A
- Voltage - Forward (Vf) (Max) @ If:
- 1.25 V @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 50 ns
- Current - Reverse Leakage @ Vr:
- 10 µA @ 300 V
- Capacitance @ Vr, F:
- 25pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -55°C ~ 150°C
USC1105 FAQ
1.How can I place an order for USC1105 through Aetrix?
Please submit a Request for Quotation (RFQ) for USC1105 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 USC1105 reliable?
The price and inventory of USC1105 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USC1105 is usually 5 days.
3.What payment methods are accepted for USC1105?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USC1105 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USC1105?
USC1105 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USC1105 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 USC1105?
For technical support, including USC1105 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USC1105 requirements.
6.How does Aetrix verify that USC1105 is sourced from the original manufacturer or authorized distributors?
All USC1105 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 USC1105 meets industry standards.
7.What is the process for return or replacement of USC1105?
All USC1105 units undergo pre-shipment inspection (PSI). If there is an issue with USC1105, 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 USC1105 part is unused and in its original packaging.
Return procedure for USC1105:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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