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Semtech Corporation UCLAMP03321PQ.C
- Part No.:
- UCLAMP03321PQ.C
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- 2-UDFN
- Datasheet:
-
UCLAMP03321PQ.C.pdf
- Description:
- 1-LINE, 3.3V ESD & SURGE PROTECT
- Quantity:
- Payment:
- Shipping:
Inventory:6,573
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Product details
Overview
UCLAMP03321PQ.C from Semtech is a single-line bidirectional ESD and surge protection diode designed for ±3.3 V I/O or power line protection in automotive and portable electronics. It delivers ±30 kV IEC 61000-4-2 contact/air ESD immunity, 50 A peak pulse current (8/20 µs), and clamps to ≤6.1 V at 10 A, enabling robust board-level transient suppression in USB voltage bus and audio line interfaces.
For engineers reviewing the UCLAMP03321PQ.C datasheet, pinout, applications, or equivalent options, key selection criteria include clamping voltage at 10–50 A, dynamic resistance (<0.01 Ω), junction capacitance (83–100 pF), AEC-Q100 Grade 1 qualification, and DFN 1.0 × 0.6 mm 2-lead package compatibility with high-density PCB layouts.
Technical Context
The UCLAMP03321PQ.C employs silicon-avalanche solid-state technology optimized for fast response to sub-nanosecond ESD transients. Its low dynamic resistance (<0.01 Ω) and tight clamping voltage window (4.31–10.5 V across 4–50 A) ensure minimal voltage overshoot during IEC 61000-4-2 and ISO 10605 events.
It operates over –40 °C to +125 °C and is qualified to AEC-Q100 (Grade 1) and AEC-Q101, confirming suitability for under-hood automotive modules and industrial edge devices where thermal stability and reliability under repeated surge stress are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | ±3.3 V - defines maximum continuous DC bias before leakage rise or breakdown risk |
| ESD Withstand | ±30 kV (IEC 61000-4-2 contact/air) - meets highest system-level ESD immunity requirements |
| Peak Pulse Current | 50 A (8/20 µs) - supports high-energy surge events without failure |
| Clamping Voltage | 6.1 V @ 10 A (8/20 µs) - limits downstream IC voltage stress during transient |
| Junction Capacitance | 83–100 pF @ 0 V, 1 MHz - preserves signal integrity on high-speed lines like USB 2.0 |
| Dynamic Resistance | <0.01 Ω - ensures rapid voltage collapse and low residual clamping |
| Reverse Leakage | <100 nA @ 3.3 V - minimizes standby power loss and signal loading |
Pinout & Package
UCLAMP03321PQ.C is housed in a DFN 1.0 × 0.6 × 0.55 mm, 2-lead surface-mount package with exposed pad (no thermal pad connection required). The package is Pb-free, halogen-free, RoHS/WEEE compliant, and UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode/Cathode (bidirectional) | Interconnects to protected line; symmetric layout enables placement without orientation constraint |
| 2 | Anode/Cathode (bidirectional) | Connects to ground reference plane; forms low-inductance path for transient current return |
Key Features
| Feature | Design Value |
|---|---|
| Low Clamping Voltage | 4.31 V @ 4 A (TLP); ensures sensitive 3.3 V logic inputs remain below absolute max rating during ESD |
| AEC-Q100 Grade 1 Qualification | Validated for –40 °C to +125 °C operation - enables use in engine control units and ADAS sensor interfaces |
| High Surge Current Capacity | 50 A (8/20 µs) - withstands multiple lightning-induced surges per ISO 7637-2 Pulse 5a |
| Ultra-Low Dynamic Resistance | <0.01 Ω - reduces voltage overshoot and improves energy dissipation efficiency |
| Small Footprint | 1.0 × 0.6 mm - saves PCB area in space-constrained handheld and automotive infotainment designs |
Applications
| USB Voltage Bus Protection | Automotive Infotainment Audio Lines |
|---|---|
Use Scenario: Protecting VBUS line in USB 2.0 Type-A/A-B connectors against hot-plug surges and ESD. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor placed between connector and USB controller's VBUS pin. Use Value: Clamps to ≤6.1 V at 10 A while adding only 83–100 pF capacitance - avoids USB signal integrity degradation. | Use Scenario: Shielding analog audio differential pairs (e.g., Line-Out, Mic-In) in head units and digital cockpits. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on each signal line, referenced to chassis ground. Use Value: Maintains audio fidelity via <100 pF loading and prevents latch-up in codec ICs during door-handle discharge events. |
| Battery Protection Circuitry | Industrial Handheld Communication Ports |
Use Scenario: Safeguarding Li-ion battery charge management ICs and fuel gauges from ESD during connector mating. IC Role / Device Role / Timing Role: Standoff voltage-matched protector on BAT+ and BAT– lines near battery connector. Use Value: ±3.3 V working voltage aligns with common battery monitor IC supply rails; ±30 kV ESD rating exceeds IEC 61000-4-2 Level 4. | Use Scenario: Securing RS-232 or UART debug ports on ruggedized tablets and field service tools. IC Role / Device Role / Timing Role: Point-of-entry ESD guard on TX/RX lines before level-shifting transceivers. Use Value: AEC-Q101 qualification ensures reliability in temperature-cycling environments; 50 A surge rating handles accidental 24 V misconnection transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SP1003-030 | Higher clamping voltage (8.5 V @ 10 A); 120 pF capacitance; SOD-323 package | Less suitable for high-speed USB due to higher capacitance and slower response | Prefer UCLAMP03321PQ.C for 3.3 V systems requiring <100 pF and sub-6 V clamping |
| ESD321 | Lower peak current (30 A); 65 pF capacitance; same DFN 1.0×0.6 mm footprint | Limited to lower-energy surge environments (e.g., consumer accessories) | UCLAMP03321PQ.C offers 67% higher surge margin and AEC-Q100 Grade 1 for automotive deployment |
Compared with SP1003-030 and ESD321, UCLAMP03321PQ.C provides superior clamping performance (≤6.1 V), higher surge robustness (50 A), and automotive-grade qualification - making it the preferred choice for mission-critical 3.3 V interface protection where reliability and signal integrity are jointly constrained.
Availability
UCLAMP03321PQ.C is available at Aetrix Electronics and suitable for automotive infotainment, USB 2.0 interface design, and industrial handheld device development requiring stable component supply and long-term lifecycle support.
Supply support for UCLAMP03321PQ.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 μClamp® product line targets board-level transient protection for high-reliability applications, with UCLAMP03321PQ.C engineered specifically for ±3.3 V bi-directional I/O lines in automotive and portable electronics subject to harsh ESD and surge environments.
FAQ
What is the maximum operating voltage of UCLAMP03321PQ.C?
The UCLAMP03321PQ.C has a reverse stand-off voltage (VRWM) of 3.3 V, meaning it is rated for continuous operation up to ±3.3 V DC or peak AC signals within that range. Exceeding this voltage risks increased leakage or premature conduction, so it must be applied only on 3.3 V nominal lines such as USB VBUS, audio I/O, or battery monitor rails. The UCLAMP03321PQ.C datasheet confirms VRWM = 3.3 V under standard test conditions.
Does UCLAMP03321PQ.C meet automotive qualification standards?
Yes, UCLAMP03321PQ.C is qualified to AEC-Q100 (Grade 1) and AEC-Q101, covering temperature ranges from –40 °C to +125 °C and validating reliability for automotive powertrain, body electronics, and infotainment systems. This dual qualification is explicitly stated in the Rev 2.0 datasheet and confirmed by Semtech's official product documentation for UCLAMP03321PQ.C.
What is the clamping voltage of UCLAMP03321PQ.C at 50 A surge current?
At 50 A peak pulse current (8/20 µs waveform), the UCLAMP03321PQ.C clamps to a maximum of 10.5 V, as specified in the Electrical Characteristics table. This value ensures downstream 3.3 V ICs remain within safe operating limits when paired with appropriate series impedance. The UCLAMP03321PQ.C maintains consistent clamping behavior across its full 10–50 A surge range, with typical values between 9.2 V and 10.5 V.
Is UCLAMP03321PQ.C unidirectional or bidirectional?
UCLAMP03321PQ.C is a bidirectional ESD protection device, symmetrically configured to protect both positive and negative transients on a single line. Its schematic symbol and pin configuration confirm identical clamping behavior for ±3.3 V operation, making it ideal for AC-coupled or floating signal paths like audio lines and USB data pairs. This bidirectionality is inherent to the UCLAMP03321PQ.C design and verified in TLP and IEC 61000-4-2 testing.
What package type and dimensions does UCLAMP03321PQ.C use?
UCLAMP03321PQ.C uses a DFN 1.0 × 0.6 × 0.55 mm, 2-lead surface-mount package with no exposed thermal pad. Land pattern dimensions and solder mask recommendations are provided in the official Semtech datasheet. The compact size supports high-density routing in portable and automotive PCBs, and the UCLAMP03321PQ.C marking code "3Z" is laser-etched on the top surface per datasheet specification.
UCLAMP03321PQ.C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- 2-UDFN
- Series:
- μClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 3.3V (Max)
- Voltage - Breakdown (Min):
- 3.8V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 50A (8/20µs)
- Power - Peak Pulse:
- 525W
- Power Line Protection:
- No
- Applications:
- USB
- Capacitance @ Frequency:
- 83pF @ 1MHz
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 2-DFN (1.6x1)
UCLAMP03321PQ.C FAQ
1.How can I place an order for UCLAMP03321PQ.C through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP03321PQ.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 UCLAMP03321PQ.C reliable?
The price and inventory of UCLAMP03321PQ.C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP03321PQ.C is usually 5 days.
3.What payment methods are accepted for UCLAMP03321PQ.C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP03321PQ.C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP03321PQ.C?
UCLAMP03321PQ.C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP03321PQ.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 UCLAMP03321PQ.C?
For technical support, including UCLAMP03321PQ.C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP03321PQ.C requirements.
6.How does Aetrix verify that UCLAMP03321PQ.C is sourced from the original manufacturer or authorized distributors?
All UCLAMP03321PQ.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 UCLAMP03321PQ.C meets industry standards.
7.What is the process for return or replacement of UCLAMP03321PQ.C?
All UCLAMP03321PQ.C units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP03321PQ.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 UCLAMP03321PQ.C part is unused and in its original packaging.
Return procedure for UCLAMP03321PQ.C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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