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Semtech Corporation UCLAMP0501H.TCT
- Part No.:
- UCLAMP0501H.TCT
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
UCLAMP0501H.TCT.pdf
- Description:
- TVS DIODE 5VWM 12.5VC SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:68,438
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Product details
Overview
UCLAMP0501H.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of single 5V I/O or power lines in USB, industrial, and IoT interfaces. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 7.5V (IPP = 24A), maintains <20mΩ dynamic resistance, and operates from –40°C to +125°C in a 1.6 × 1.6 mm DFN-6 package.
For engineers reviewing the UCLAMP0501H.TCT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, validated pin mapping, real-world protection use cases, and comparable alternatives for 5V bus protection in USB Type-C, load switch inputs, and industrial control interfaces.
Technical Context
The UCLAMP0501H.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant across 0–24A peak pulse current due to decreasing RDS(on) under surge conditions.
It features 175 pF junction capacitance at 5V reverse bias, 130–600 nA leakage at VRWM = 5V, and a 7.5V clamping voltage under 24A 8/20μs surge - all specified over –40°C to +125°C. Its DFN-6 layout groups three input pins (4–6) and three ground pins (1–3) to minimize parasitic inductance and maximize surge current handling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage | 5 V - matches standard USB 2.0/3.x, GPIO, and low-voltage industrial I/O rails without derating. |
| Clamping Voltage (IPP = 24A) | 7.5 V - stays below typical 8–10V damage thresholds of USB controllers and load switches. |
| ESD Withstand | ±30 kV contact & air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer and industrial end equipment. |
| Peak Pulse Current | 24 A (8/20 μs) - supports IEC 61000-4-5 surge testing up to ±1 kV (RS = 42 Ω) on 5V lines. |
| Junction Capacitance | 175 pF @ 5 V - low enough for USB 2.0 signal integrity; not suitable for USB 3.x SuperSpeed lanes. |
| Dynamic Resistance | 20 mΩ - ensures minimal voltage rise during high-current transients, enabling stable clamping. |
Pinout & Package
UCLAMP0501H.TCT is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6 mm × 1.6 mm × 0.55 mm with exposed thermal pad (no solder mask defined). All six terminals are surface-mount; no leaded variant exists.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | GND | Common ground return for surge current; all three must be connected to PCB ground plane via multiple vias to minimize inductance and sustain full 24A rating. |
| 4, 5, 6 | IN | Protected line input; tied together internally and externally to handle high-energy transients across shared I/O or power rail. |
Key Features
| Feature | Design Value |
|---|---|
| FET-based transient diversion | Replaces traditional TVS diodes with active shunt switching, delivering flat clamping vs. current and temperature. |
| Constant clamping across temperature | Clamps at 7.5V from –40°C to +125°C - eliminates thermal derating calculations required for silicon TVS devices. |
| Low dynamic resistance | 20 mΩ enables sub-0.5V voltage rise during 24A surge - critical for protecting sensitive 5V logic and analog inputs. |
| High ESD robustness | ±30kV contact discharge withstand allows direct placement on exposed connectors without additional shielding layers. |
| Space-optimized DFN-6 footprint | 1.6 × 1.6 mm area saves >60% board space versus SO-8 or SOT-23 TVS solutions rated for equivalent surge energy. |
Applications
| USB 2.0 Data Lines | Industrial Sensor Inputs |
|---|---|
Use Scenario: Protecting D+ and D– lines of USB 2.0 ports against ESD events from user insertion, cable coupling, or nearby discharge. IC Role / Device Role / Timing Role: Transient diverting suppressor placed immediately after the USB connector, before series resistors or controller IC. Use Value: Clamps to 7.5V during ±30kV ESD strikes, preventing latch-up or gate oxide damage in USB PHYs while maintaining signal integrity with 175 pF loading. |
Use Scenario: Safeguarding 4–20 mA loop-powered sensor inputs in PLC modules exposed to field wiring surges and lightning-induced transients. IC Role / Device Role / Timing Role: Primary front-end protection device on analog input rails, operating in parallel with precision signal conditioning circuitry. Use Value: Absorbs 24A 8/20μs surges without degrading accuracy; stable clamping prevents overvoltage stress on op-amps and ADC references. |
| Load Switch Input Protection | IoT Device Power Rails |
Use Scenario: Shielding enable and VIN pins of integrated load switches (e.g., TPS229xx, AP22653) used in battery-powered edge nodes. IC Role / Device Role / Timing Role: Standalone EOS protector placed between connector and load switch input, independent of internal switch protection. Use Value: Limits clamping to 7.5V - well below typical 8–12V absolute maximum ratings of internal FETs - avoiding permanent gate damage during surge events. |
Use Scenario: Securing 5V system rails in compact wireless sensors subjected to ESD during handling and electrostatic-rich factory environments. IC Role / Device Role / Timing Role: Single-device solution for bulk power rail protection, replacing multi-component TVS + RC networks. Use Value: Delivers certified ±30kV ESD immunity in minimal footprint, enabling reliable operation in unshielded enclosures without redesigning PCB stackup. |
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; 5.0V standoff, 14.4V clamping at 24A; higher dynamic resistance (~1.2Ω); 1000 pF capacitance. | Higher clamping voltage risks damaging 5V logic; excessive capacitance degrades USB 2.0 eye diagram; requires thermal relief on cathode pad. | Select only if cost sensitivity outweighs clamping performance and board space constraints. |
| TPD4E004DRYR | Quad-channel 5V TVS array; 5.5V standoff, 14V clamping at 1A; 0.8 pF per channel; rated for ±12kV ESD only. | Insufficient for IEC 61000-4-5 surge; limited to low-energy ESD; unsuitable for power rail or high-current I/O protection. | Use only for ultra-low-capacitance data-line protection where surge immunity is secondary to signal fidelity. |
Compared with SMAJ5.0A and TPD4E004DRYR, UCLAMP0501H.TCT offers superior surge handling (24A vs. ≤12A), lower clamping (7.5V vs. ≥14V), and stable performance across temperature - making it the preferred choice for robust 5V rail protection where reliability trumps component count.
Availability
UCLAMP0501H.TCT is available at Aetrix Electronics and suitable for USB interface design, industrial sensor conditioning, and IoT power rail protection requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for UCLAMP0501H.TCT 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 high-performance analog and mixed-signal ICs for precision protection, signal integrity, and power management.
The UCLAMP0501H.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) family, engineered to replace conventional TVS diodes in applications demanding flat clamping, high surge current, and temperature-stable EOS protection.
FAQ
What is the exact clamping voltage of UCLAMP0501H.TCT at 24A surge current?
The UCLAMP0501H.TCT clamps at 7.5 V under 24A peak pulse current (tp = 8/20 μs), as guaranteed by design and verified across –40°C to +125°C. This value remains stable regardless of ambient temperature or current magnitude within the rated range, unlike conventional TVS diodes whose clamping rises linearly with current.
Can UCLAMP0501H.TCT be used on USB 3.x SuperSpeed differential pairs?
No, UCLAMP0501H.TCT is not suitable for USB 3.x SuperSpeed lanes. Its 175 pF junction capacitance at 5V reverse bias introduces excessive signal distortion and insertion loss on 5 Gbps differential channels. For those lines, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25 pF).
Does UCLAMP0501H.TCT require a thermal pad or heatsink on the PCB?
No, UCLAMP0501H.TCT does not require a thermal pad or external heatsink. Its FET-based architecture dissipates surge energy primarily through conduction rather than junction heating, and the DFN-6 package is rated for full 24A surge performance without thermal derating - provided all GND pins (1–3) connect directly to a solid ground plane via multiple vias.
How does UCLAMP0501H.TCT differ from standard TVS diodes in failure mode under repeated surges?
UCLAMP0501H.TCT exhibits graceful degradation under repeated surges due to its FET-based topology: the trigger circuit and shunt FET maintain consistent clamping voltage and dynamic resistance over lifetime. Standard TVS diodes degrade via junction wear, leading to rising leakage, reduced breakdown voltage, and eventual short-circuit failure - a risk mitigated by UCLAMP0501H.TCT's architecture.
Is UCLAMP0501H.TCT compatible with lead-free reflow profiles?
Yes, UCLAMP0501H.TCT is fully compatible with standard IPC/JEDEC J-STD-020D lead-free reflow profiles. Its DFN-6 package uses lead-free terminal finish and meets RoHS/WEEE requirements, with a maximum peak temperature rating of 260°C for 30 seconds - matching common Class 3 assembly processes.
UCLAMP0501H.TCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- SC-79, SOD-523
- Series:
- µClamp®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V (Max)
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 12.5V
- Current - Peak Pulse (10/1000µs):
- 16A (8/20µs)
- Power - Peak Pulse:
- 240W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 160pF @ 1MHz
- Operating Temperature:
- -55°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
UCLAMP0501H.TCT FAQ
1.How can I place an order for UCLAMP0501H.TCT through Aetrix?
Please submit a Request for Quotation (RFQ) for UCLAMP0501H.TCT 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 UCLAMP0501H.TCT reliable?
The price and inventory of UCLAMP0501H.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP0501H.TCT is usually 5 days.
3.What payment methods are accepted for UCLAMP0501H.TCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP0501H.TCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for UCLAMP0501H.TCT?
UCLAMP0501H.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your UCLAMP0501H.TCT 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 UCLAMP0501H.TCT?
For technical support, including UCLAMP0501H.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP0501H.TCT requirements.
6.How does Aetrix verify that UCLAMP0501H.TCT is sourced from the original manufacturer or authorized distributors?
All UCLAMP0501H.TCT 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 UCLAMP0501H.TCT meets industry standards.
7.What is the process for return or replacement of UCLAMP0501H.TCT?
All UCLAMP0501H.TCT units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP0501H.TCT, 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 UCLAMP0501H.TCT part is unused and in its original packaging.
Return procedure for UCLAMP0501H.TCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
UCLAMP0501H.TCT Tags
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