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Home > Products > Circuit Protection > Surge Suppression Ics

Semtech Corporation UCLAMP02121ZA.F

Name: UCLAMP02121ZA.F
Brand: Semtech Corporation
SKU: UCLAMP02121ZA.F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: UCLAMP02121ZA.F

Manufacturer:: Semtech Corporation

Category:: Surge Suppression Ics

Package:: 0201 (0603 Metric)

Datasheet:: UCLAMP02121ZA.F.pdf

Description:: 2.1V 15A 0.08R ESD SLP0603P2X3L

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Inventory:14,270

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Product details

Overview

UCLAMP02121ZA.F from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated power or I/O lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, 20mΩ dynamic resistance, and 175pF junction capacitance at 22V.

For engineers reviewing the UCLAMP02121ZA.F datasheet, pinout, applications, or equivalent options, this device delivers stable clamping across temperature (−40°C to +125°C) and current (24–40A), supports USB Type-C PD bus protection, load switch input safeguarding, and industrial IoT surge resilience without clamping voltage drift.

Technical Context

The UCLAMP02121ZA.F uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit that turns on the shunt path when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant due to decreasing R_DS(on) under surge conditions.

It operates with a 22V reverse stand-off voltage (V_RWM), 25–27.9V breakdown (V_BR at 1mA), and maintains <28V clamping up to 40A across −40°C to +125°C - verified in both 1.2/50μs + 8/20μs combination waveforms and 8/20μs surges - enabling reliable protection where thermal derating compromises standard TVS performance.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22V - matches nominal USB PD bus and industrial 24V rail systems without false triggering
Clamping Voltage	27.5–28V at 40A (8/20μs) - stays below 30V damage threshold of most 24V-rated controllers and load switches
ESD Rating	±30kV contact & air (IEC 61000-4-2) - exceeds Level 4 immunity for handheld and connector-facing interfaces
Peak Pulse Current	40A (8/20μs) - meets IEC 61000-4-5 industrial surge requirements (±1kV, RS = 42Ω)
Dynamic Resistance	20mΩ - ensures minimal voltage rise during surge conduction, critical for low-voltage margin designs
Junction Capacitance	175pF at 22V, 1MHz - compatible with DC power rails and low-speed control lines; not suitable for >100MHz signal paths

Pinout & Package

UCLAMP02121ZA.F is housed in a RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with six leads and UL 94V-0 molding compound. The package supports tape-and-reel handling and features lead-free finish with laser-marked T22 date code.

Pin/Terminal	Circuit Role	Design Meaning
Pins 1, 2, 3	GND	Common ground return path - all three must be connected to minimize inductance and maximize surge current handling
Pins 4, 5, 6	IN	Protected line input - parallel connection of all three pins ensures uniform current sharing and full 40A rating

Key Features

Feature	Design Value
Constant-clamp architecture	Clamping voltage varies <0.5V from 24A to 40A - eliminates need for over-spec'ing IPP to meet V_C limits
Temperature-stable protection	Clamping holds ≤28V from −40°C to +125°C - removes thermal derating calculations required for TVS diodes
Low dynamic resistance	20mΩ enables efficient energy diversion with <1V IR drop at 40A - reduces localized heating vs. higher-R_DYN devices
High-energy surge capability	1120W peak pulse power (8/20μs) - sustains multi-event transients in industrial and automotive power domains

Applications

USB Type-C Power Delivery Bus Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting V_Bus lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp overvoltage before reaching PD controller or e-fuse. Use Value: Maintains 27.5–28V clamping across full 40A surge and operating temperature range - prevents controller latch-up or gate oxide damage seen with rising-V_C TVS solutions.	Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment. IC Role / Device Role / Timing Role: Primary front-end surge shunt, conducting transient current away from the load switch's internal MOSFET drain-source path. Use Value: Keeps clamping voltage below 30V - well under typical 35–40V absolute maximum drain-source rating - avoiding catastrophic FET failure during 1kV/42Ω surges.
IoT Edge Node Power Rail Protection	Storage Device 24V Backup Supply Protection
Use Scenario: Securing 22–24V auxiliary power inputs on battery-backed wireless sensors and gateway modules deployed in unshielded environments. IC Role / Device Role / Timing Role: Standalone EOS protector on DC input rail, coordinated with upstream fuse and downstream LDO/regulator. Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint - saves >50% board area versus SOD-323 TVS alternatives while maintaining same clamping performance.	Use Scenario: Protecting 24V backup supply lines feeding NVMe SSDs or SATA storage controllers in enterprise servers and NAS units. IC Role / Device Role / Timing Role: High-reliability transient suppressor on primary power input, rated for repeated surge events per IEC 61000-4-5. Use Value: 1120W peak pulse power rating and −40°C to +125°C operation ensure sustained protection across server thermal cycles and data center ambient fluctuations.

USB Type-C Power Delivery Bus Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting V_Bus lines in USB-C receptacles supporting up to 20V/5A PD negotiation, exposed to ESD and lightning-induced surges.

IC Role / Device Role / Timing Role: Transient diverting suppressor placed directly at connector entry point to clamp overvoltage before reaching PD controller or e-fuse.

Use Value: Maintains 27.5–28V clamping across full 40A surge and operating temperature range - prevents controller latch-up or gate oxide damage seen with rising-V_C TVS solutions.

Use Scenario: Safeguarding input terminals of high-side load switches (e.g., HS2950P) in remote meters, robotics, and factory automation equipment.

IC Role / Device Role / Timing Role: Primary front-end surge shunt, conducting transient current away from the load switch's internal MOSFET drain-source path.

Use Value: Keeps clamping voltage below 30V - well under typical 35–40V absolute maximum drain-source rating - avoiding catastrophic FET failure during 1kV/42Ω surges.

IoT Edge Node Power Rail Protection

Storage Device 24V Backup Supply Protection

Use Scenario: Securing 22–24V auxiliary power inputs on battery-backed wireless sensors and gateway modules deployed in unshielded environments.

IC Role / Device Role / Timing Role: Standalone EOS protector on DC input rail, coordinated with upstream fuse and downstream LDO/regulator.

Use Value: Delivers 40A surge handling in 1.6×1.6mm footprint - saves >50% board area versus SOD-323 TVS alternatives while maintaining same clamping performance.

Use Scenario: Protecting 24V backup supply lines feeding NVMe SSDs or SATA storage controllers in enterprise servers and NAS units.

IC Role / Device Role / Timing Role: High-reliability transient suppressor on primary power input, rated for repeated surge events per IEC 61000-4-5.

Use Value: 1120W peak pulse power rating and −40°C to +125°C operation ensure sustained protection across server thermal cycles and data center ambient fluctuations.

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 clamping at 12.3A (8/20μs); 1000W peak power; 1.5pF leakage at 17.6V	Higher clamping voltage increases risk of downstream IC damage; requires larger IPP margin to meet same V_C target	Select only if cost sensitivity outweighs clamping stability and thermal robustness requirements
TPD2E001DRYR	Low-capacitance (1.5pF) dual-channel ESD protector; 15V working voltage; ±8kV contact ESD; no surge rating beyond IEC 61000-4-2	Limited to ESD-only protection; unsuitable for IEC 61000-4-5 surge or EOS events above 1A	Use only for high-speed data lines (e.g., USB SS lanes); never substitute for UCLAMP02121ZA.F on power rails

Compared with SMAJ22A and TPD2E001DRYR, UCLAMP02121ZA.F uniquely combines 40A surge capability, sub-28V clamping across temperature, and FET-based constant-clamp behavior - making it the only option among the three qualified for industrial 22V bus protection requiring repeatable, thermally invariant performance.

Availability

UCLAMP02121ZA.F is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch inputs, IoT edge node power rails, and storage device backup supplies requiring stable component supply, long-term lifecycle support, and consistent surge performance across production batches.

Supply support for UCLAMP02121ZA.F 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, power management, and transient protection.

The UCLAMP02121ZA.F belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection where clamping voltage stability over temperature and current is mission-critical.

FAQ

What is the maximum operating temperature range for UCLAMP02121ZA.F?

The UCLAMP02121ZA.F is rated for continuous operation from −40°C to +125°C. Its clamping voltage remains stable within 27.5–28V across this full range at 40A surge current, unlike standard TVS diodes whose V_C rises significantly with temperature. This makes UCLAMP02121ZA.F suitable for under-hood automotive modules, industrial PLCs, and outdoor IoT enclosures where ambient extremes are expected.

Does UCLAMP02121ZA.F require external bias or control signals to function?

No, UCLAMP02121ZA.F is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated FET that activate automatically when transient voltage exceeds the breakdown threshold (~25–27.9V). No external power, enable pins, or configuration registers are needed - UCLAMP02121ZA.F operates immediately upon installation in the signal path.

Can UCLAMP02121ZA.F be used on high-speed data lines like USB SuperSpeed or PCIe?

No, UCLAMP02121ZA.F is not suitable for high-speed data lines. With 175pF junction capacitance at 22V, it would severely attenuate signals above ~10MHz and disrupt impedance matching. It is intended exclusively for DC power rails and low-speed control lines (e.g., enable, fault, or CC lines in USB-C). For SuperSpeed lanes, Semtech recommends RClamp3371ZC (<0.25pF).

How does UCLAMP02121ZA.F differ from traditional TVS diodes in surge response?

UCLAMP02121ZA.F uses a triggered FET architecture instead of a pn-junction avalanche structure. When a surge occurs, its internal trigger circuit activates the shunt FET, which exhibits decreasing R_DS(on) as current rises - resulting in near-constant clamping voltage. In contrast, TVS diodes follow V_C = V_BR + I_PP × R_DYN, causing V_C to increase linearly with current and temperature - a key limitation UCLAMP02121ZA.F eliminates.

Is UCLAMP02121ZA.F RoHS compliant and halogen free?

Yes, UCLAMP02121ZA.F is Pb-free, halogen-free, and fully compliant with RoHS and WEEE directives. Its DFN package uses UL 94V-0 rated molding compound and lead-free terminal finish, meeting environmental requirements for consumer, industrial, and medical electronics. The marking code "T22" and date code are laser-etched for traceability.

UCLAMP02121ZA.F Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Package/Case:: 0201 (0603 Metric)

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Clamping:: -

Technology:: -

Number of Circuits:: -

Applications:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 2-DFN (0.6x0.3)

UCLAMP02121ZA.F FAQ

1.How can I place an order for UCLAMP02121ZA.F through Aetrix?

Please submit a Request for Quotation (RFQ) for UCLAMP02121ZA.F 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 UCLAMP02121ZA.F reliable?

The price and inventory of UCLAMP02121ZA.F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for UCLAMP02121ZA.F is usually 5 days.

3.What payment methods are accepted for UCLAMP02121ZA.F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for UCLAMP02121ZA.F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for UCLAMP02121ZA.F?

UCLAMP02121ZA.F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your UCLAMP02121ZA.F 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 UCLAMP02121ZA.F?

For technical support, including UCLAMP02121ZA.F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your UCLAMP02121ZA.F requirements.

6.How does Aetrix verify that UCLAMP02121ZA.F is sourced from the original manufacturer or authorized distributors?

All UCLAMP02121ZA.F 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 UCLAMP02121ZA.F meets industry standards.

7.What is the process for return or replacement of UCLAMP02121ZA.F?

All UCLAMP02121ZA.F units undergo pre-shipment inspection (PSI). If there is an issue with UCLAMP02121ZA.F, 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 UCLAMP02121ZA.F part is unused and in its original packaging.

Return procedure for UCLAMP02121ZA.F:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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