TDS2621LP holds near-constant clamping voltage from 0 A to 24 A in an ultra-compact 1.6 mm² footprint for 24 V DC industrial robotics

Semtech Corporation (NASDAQ:SMTC), a leading provider of high-performance semiconductors powering AI data center networking and intelligent, connected Internet of Things ("IoT") devices worldwide, today announced TDS2621LP, the latest addition to its SurgeSwitch® family. Purpose built for 24 V DC power buses in industrial robotics, collaborative robots (cobots) and automated manufacturing, TDS2621LP delivers near-constant clamping voltage, IEC 61000-4-5 surge compliance and a 1.6 mm² footprint, replacing bulkier conventional industrial packaged protection devices.

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Purpose built for 24 V DC power buses in industrial robotics, collaborative robots (cobots) and automated manufacturing, Semtech's TDS2621LP delivers near-constant clamping voltage, IEC 61000-4-5 surge compliance and a 1.6 mm² footprint.

As robotic systems shrink and move closer to humans on the factory floor, safety-critical I/O modules face a harsher Electrostatic Discharge (ESD) and surge environment. Inductive loads such as servo motors, electromagnetic brakes and pneumatic solenoids switching on and off thousands of times per shift generate high-energy transients directly on the 24 V DC bus feeding sensitive control circuitry. Conventional Transient Voltage Suppression (TVS) diodes see clamping voltage rise with peak pulse current and shift across the industrial temperature range, leaving protection margins unpredictable and requiring designers to over-specify downstream components.

"As robots and cobots pack more electronics into smaller spaces, critical margin for protection error shrinks while transient energy on the 24 V bus grows," said Tamir Reshef, vice president of marketing and applications, analog and mixed signal products group at Semtech. "TDS2621LP solves density and footprint issues with near-constant clamping voltage at full pulse current, offering robotics system designers predictable headroom."

TDS2621LP, built on Semtech’s proven SurgeSwitch architecture, advances the conventional PN-junction approach with a surge-rated FET operating as a precision voltage-controlled switch. Unlike conventional TVS diodes, SurgeSwitch offers uniform clamping voltage of 35 V at 24 A (8/20 μs) with a dynamic resistance of just 32 mΩ across the full pulse current range.

Target Applications

Cobot joint electronics and controller boards
Industrial robot input line protection
Autonomous mobile robot (AMR) and automated guided vehicle (AGV) power buses
PLC I/O modules, fieldbus interfaces (PROFIBUS, EtherCAT, IO-Link) and distributed control cabinets
24 V actuator and solenoid valve driver boards in factory automation
Industrial sensor power lines and smart sensor nodes
VBUS power lines in USB Type-C industrial ports
IoT edge devices operating on 24 V DC infrastructure

Key Specifications

Maximum working voltage: 26.4 V (matched to the IEC upper tolerance band for 24 V DC systems)
Peak pulse current: 24 A (tp = 8/20 μs) per IEC 61000-4-5
Maximum clamping voltage: 35 V at 24 A
Dynamic resistance: 32 mΩ
Package: DFN 1.6 mm² footprint, 2-Lead

Availability

TDS2621LP is available now in production quantities, supplied in 7-inch tape-and-reel, 3,000 units per reel. Samples and evaluation support are available through Semtech’s authorized distribution partners and for direct purchase on semtech.com. For design-in support, application notes and reference layout guidance, learn more at TDS2621LP.

Customers and partners are invited to visit Semtech at Booth #H3.G11 during Electronica India 2026, Sept. 16–18, in Bengaluru, India, to learn more about the portfolio and meet with Semtech’s technical experts.

About Semtech

Semtech Corporation (NASDAQ:SMTC) is a leading provider of high-performance semiconductors powering AI data center networking and intelligent, connected IoT devices worldwide. Our global teams are committed to empowering solution architects and application developers to develop breakthrough products for the infrastructure, industrial and consumer markets. To learn more about Semtech technology, visit us at Semtech.com or follow us on LinkedIn or X.

Semtech, the Semtech logo and SurgeSwitch are registered trademarks or service marks of Semtech Corporation or its subsidiaries. All other trademarks, service marks and trade names mentioned in this press release are the property of their respective owners.

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View source version on businesswire.com: https://www.businesswire.com/news/home/20260915242022/en/

Michelle Lozada, pr@semtech.com