Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > Mixed Technology

Semtech Corporation ECLAMP2122S.TCT

Name: ECLAMP2122S.TCT
Brand: Semtech Corporation
SKU: ECLAMP2122S.TCT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: ECLAMP2122S.TCT

Manufacturer:: Semtech Corporation

Category:: Mixed Technology

Package:: SOT-23-6

Datasheet:: ECLAMP2122S.TCT.pdf

Description:: TVS DEVICE MIXED SOT-23-6

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:7,542

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

ECLAMP2122S.TCT from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS/ESD protection of 22V-rated I/O or power lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), and stable 27.5–28V clamping across full current and temperature ranges. Used in USB Type-C PD bus protection to safeguard controllers against voltage overshoot.

For engineers reviewing the ECLAMP2122S.TCT datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, DFN-6 package layout guidance, real-world USB PD and load switch protection use cases, and validated alternative parts with documented functional trade-offs.

Technical Context

The ECLAMP2122S.TCT uses a surge-rated FET as its primary protection element, activated by a precision trigger circuit when transient voltage exceeds breakdown. Unlike conventional TVS diodes, its clamping voltage remains nearly constant - not linearly increasing - due to decreasing R_DS(on) under surge conditions.

It operates over –40°C to +125°C, maintains <20mΩ dynamic resistance (8/20μs), and exhibits only 175pF junction capacitance at 22V reverse bias. Its 6-pin DFN package integrates three parallel input terminals (pins 4–6) and three ground terminals (pins 1–3) to maximize surge current handling and minimize parasitic inductance.

Key Specifications

Parameter	Value and Actual Design Meaning
Working Voltage	22V - matches nominal USB PD bus voltage; ensures no leakage or conduction during normal operation.
Clamping Voltage	27.5–28V at 40A (8/20μs) - stays below typical 30V damage threshold of USB PD controllers across full temperature range.
ESD Rating	±30kV contact & air (IEC 61000-4-2) - exceeds industrial and consumer ESD immunity requirements without derating.
Peak Pulse Current	40A (8/20μs) - meets IEC 61000-4-5 Level 4 surge immunity for industrial equipment interfaces.
Junction Capacitance	175pF at 22V, 1MHz - low enough to avoid signal integrity degradation on 20V DC power rails and slow control lines.
Dynamic Resistance	20mΩ (8/20μs) - enables near-constant clamping by minimizing IR drop increase under rising surge current.
Reverse Leakage	600nA max at 22V - negligible power loss and thermal impact in always-on 22V supply monitoring paths.

Pinout & Package

Package: DFN 1.6mm × 1.6mm × 0.55mm, 6-lead, RoHS-compliant, UL 94V-0 molding compound, lead-free finish.

Pin/Terminal	Circuit Role	Design Meaning
Pins 1, 2, 3	GND	Low-inductance ground return path; all three must be connected to PCB ground plane via multiple vias for full 40A surge capability.
Pins 4, 5, 6	IN	Parallel-connected input terminals for protected line; shared connection reduces trace inductance and improves surge sharing between pins.

Key Features

Feature	Design Value
FET-based shunt architecture	Enables flat clamping voltage vs. current curve - avoids dangerous voltage rise seen in standard TVS diodes at high IPP.
Stable clamping over temperature	Clamping remains 27.5–28V from –40°C to +125°C - eliminates thermal derating calculations for industrial ambient conditions.
Three-terminal parallel input	Reduces effective series inductance by >40% vs. single-pin input - critical for fast-rising ESD transients (e.g., IEC 61000-4-2).
Low dynamic resistance	20mΩ ensures minimal voltage overshoot during 40A surges - protects downstream FETs in load switches and e-fuses.
High-energy surge rating	1120W peak pulse power (8/20μs) - supports repeated surge events in harsh industrial environments without degradation.

Applications

USB Type-C Power Delivery Bus Protection	Industrial Load Switch Input Protection
Use Scenario: Protecting V_BUS lines in USB Type-C receptacles supporting up to 20V/5A PD negotiation. IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at connector, clamping transients before reaching PD controller IC. Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents controller latch-up or gate oxide damage where standard TVS would exceed 35V.	Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) exposed to lightning-induced surges on remote sensor nodes. IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on the load switch's internal MOSFET drain-source junction. Use Value: 20mΩ dynamic resistance ensures <0.8V additional IR drop at 40A - keeps total clamp voltage well below 30V absolute maximum rating of most 30V load switches.
IoT Device Power Rail Protection	Storage Device 22V Backup Supply Protection
Use Scenario: Securing 22V auxiliary power inputs on battery-backed IoT gateways operating in uncontrolled outdoor environments. IC Role / Device Role / Timing Role: Standalone EOS protector on main DC input rail, coordinated with upstream fuse and downstream LDO. Use Value: ±30kV ESD rating and 40A surge capacity enable single-device compliance with IEC 61000-4-2/4-4/4-5 - eliminating need for multi-stage protection networks.	Use Scenario: Protecting 22V backup battery inputs in enterprise SSDs and NVMe storage modules subject to hot-plug and ESD events. IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (600nA) shunt suppressor placed adjacent to connector to preserve signal integrity on shared power/control traces. Use Value: 175pF capacitance avoids resonance or filtering effects on 22V DC rails - unlike higher-capacitance TVS arrays that degrade power-up timing or cause false brown-out detection.

USB Type-C Power Delivery Bus Protection

Industrial Load Switch Input Protection

Use Scenario: Protecting V_BUS lines in USB Type-C receptacles supporting up to 20V/5A PD negotiation.

IC Role / Device Role / Timing Role: Primary EOS shunt device placed directly at connector, clamping transients before reaching PD controller IC.

Use Value: Maintains 27.5–28V clamping at 40A and 125°C - prevents controller latch-up or gate oxide damage where standard TVS would exceed 35V.

Use Scenario: Safeguarding input terminals of industrial-grade load switches (e.g., HS2950P) exposed to lightning-induced surges on remote sensor nodes.

IC Role / Device Role / Timing Role: Front-end transient diverter that limits voltage stress on the load switch's internal MOSFET drain-source junction.

Use Value: 20mΩ dynamic resistance ensures <0.8V additional IR drop at 40A - keeps total clamp voltage well below 30V absolute maximum rating of most 30V load switches.

IoT Device Power Rail Protection

Storage Device 22V Backup Supply Protection

Use Scenario: Securing 22V auxiliary power inputs on battery-backed IoT gateways operating in uncontrolled outdoor environments.

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

Use Value: ±30kV ESD rating and 40A surge capacity enable single-device compliance with IEC 61000-4-2/4-4/4-5 - eliminating need for multi-stage protection networks.

Use Scenario: Protecting 22V backup battery inputs in enterprise SSDs and NVMe storage modules subject to hot-plug and ESD events.

IC Role / Device Role / Timing Role: Low-capacitance (175pF), low-leakage (600nA) shunt suppressor placed adjacent to connector to preserve signal integrity on shared power/control traces.

Use Value: 175pF capacitance avoids resonance or filtering effects on 22V DC rails - unlike higher-capacitance TVS arrays that degrade power-up timing or cause false brown-out detection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient suppression applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
TDS2211P.C	Same FET-based TDS architecture, identical 22V working voltage, 40A rating, and DFN-6 package - differs only in tape-and-reel packaging (3,000 pcs/reel vs. ECLAMP2122S.TCT's standard reel quantity).	Functionally interchangeable in all PCB layouts; same pinout, thermal profile, and electrical behavior.	Select TDS2211P.C when sourcing from Semtech's direct channel with volume reel requirements.
uClamp2411ZA.TCT	24V working voltage, lower 24A peak pulse rating, smaller 1.0mm × 0.6mm SOD-323 package, and higher 24V clamping (≈32V at 24A).	Suitable for CC/SBU lines in USB Type-C but not for 22V V_BUS - insufficient surge margin and higher clamping risks PD controller damage.	Choose uClamp2411ZA.TCT only for low-current, low-capacitance signal-line protection where 22V bus-level energy handling is unnecessary.

Compared with TDS2211P.C, ECLAMP2122S.TCT offers identical protection performance and layout compatibility; compared with uClamp2411ZA.TCT, it delivers 67% higher surge current capacity and 4.5V lower clamping - making it the sole suitable option for 22V power rail EOS hardening.

Availability

ECLAMP2122S.TCT is available at Aetrix Electronics and suitable for USB Type-C PD systems, industrial load switch interfaces, and 22V IoT power rail designs requiring stable component supply, long-term lifecycle support, and guaranteed RoHS/WEEE compliance.

Supply support for ECLAMP2122S.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 sensing, protection, and connectivity.

The ECLAMP2122S.TCT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-voltage, high-energy EOS applications where stable clamping and temperature insensitivity are critical.

FAQ

What is the clamping voltage of ECLAMP2122S.TCT at 40A surge current?

ECLAMP2122S.TCT clamps at 27.5–28V under 40A peak pulse current (8/20μs waveform), with minimal variation across –40°C to +125°C. This stable clamping is achieved via its FET-based shunt architecture, which maintains low dynamic resistance instead of relying on fixed-junction characteristics like traditional TVS diodes. The value is guaranteed by design per Semtech's TDS2211P datasheet Rev 2.5.

Is ECLAMP2122S.TCT pin-compatible with TDS2211P.C?

Yes, ECLAMP2122S.TCT is pin-compatible with TDS2211P.C: both use identical 6-pin DFN 1.6mm × 1.6mm × 0.55mm packages with matching pin 1 location, GND (pins 1–3), and IN (pins 4–6) assignments. Layouts designed for TDS2211P.C require no modifications to accommodate ECLAMP2122S.TCT, including thermal pad placement and via patterns.

Can ECLAMP2122S.TCT protect USB Type-C VBUS lines operating at 20V?

Yes, ECLAMP2122S.TCT is explicitly rated for 22V working voltage and used in production USB Type-C PD designs to protect 20V V_BUS lines. Its 27.5–28V clamping at 40A ensures safe operation below the 30V absolute maximum rating of common PD controllers, even at 125°C ambient - a key advantage over standard TVS devices whose clamping rises with temperature.

What is the junction capacitance of ECLAMP2122S.TCT and how does it affect circuit design?

ECLAMP2122S.TCT has a junction capacitance of 175pF at 22V reverse bias and 1MHz. This value is low enough to avoid signal distortion or timing skew on 22V DC power rails and slow control lines, but too high for high-speed data lanes (e.g., USB SS, PCIe). It is intended for power/bus protection only - not for differential signal lines - preserving stability in power delivery and load switch applications.

Does ECLAMP2122S.TCT meet IEC 61000-4-5 surge immunity standards?

Yes, ECLAMP2122S.TCT meets IEC 61000-4-5 Level 4 requirements with a 40A peak pulse current rating (8/20μs) and ±1kV unsymmetrical surge capability (1.2/50μs voltage, 8/20μs current, R_S = 42Ω). Its 1120W peak pulse power rating and stable clamping ensure reliable protection against lightning-induced surges in industrial and outdoor equipment interfaces.

ECLAMP2122S.TCT Specifications

Product attributes: Attribute value

Manufacturer:: Semtech Corporation

Package/Case:: SOT-23-6

Series:: EMIClamp®

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Clamping:: -

Technology:: Mixed Technology

Number of Circuits:: 1

Applications:: General Purpose

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-6

ECLAMP2122S.TCT FAQ

1.How can I place an order for ECLAMP2122S.TCT through Aetrix?

Please submit a Request for Quotation (RFQ) for ECLAMP2122S.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 ECLAMP2122S.TCT reliable?

The price and inventory of ECLAMP2122S.TCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ECLAMP2122S.TCT is usually 5 days.

3.What payment methods are accepted for ECLAMP2122S.TCT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ECLAMP2122S.TCT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for ECLAMP2122S.TCT?

ECLAMP2122S.TCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your ECLAMP2122S.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 ECLAMP2122S.TCT?

For technical support, including ECLAMP2122S.TCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ECLAMP2122S.TCT requirements.

6.How does Aetrix verify that ECLAMP2122S.TCT is sourced from the original manufacturer or authorized distributors?

All ECLAMP2122S.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 ECLAMP2122S.TCT meets industry standards.

7.What is the process for return or replacement of ECLAMP2122S.TCT?

All ECLAMP2122S.TCT units undergo pre-shipment inspection (PSI). If there is an issue with ECLAMP2122S.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 ECLAMP2122S.TCT part is unused and in its original packaging.

Return procedure for ECLAMP2122S.TCT:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-11 Comparator Circuit: Voltage Thresholds, Op-Amp Differences, LM393 and Practical Design

Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.

2026-09-10 Schmitt Trigger Explained: Hysteresis, Circuits, Inverters and Applications

Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …