Semtech Unveils SurgeSwitch™ System Transient Protection Product Line, Offering Compelling Performance Advantages Over Conventional TVS Devices

Semtech’s SurgeSwitch™ product line offers 30% reduced clamping, 80% smaller package size and stability of clamping over temperature

CAMARILLO, Calif., Dec. 21, 2021 – Semtech Corporation (Nasdaq: SMTC), a leading global supplier of high performance analog and mixed-signal semiconductors and advanced algorithms, today unveiled the release of the SurgeSwitch™ product line. Semtech’s SurgeSwitch devices are specifically designed to protect circuits and systems operating in harsh industrial and telecom environments.

“SurgeSwitch represents an exciting revolution in Electrical Overstress (EOS) protection,” said Tamir Reshef, director of marketing for Semtech’s Protection Products Group. “The constant clamping characteristics takes the guesswork out of protecting circuits, especially in applications that require protection over industrial and automotive temperature ranges.”

Unlike conventional Transient Voltage Suppressor (TVS) diodes, SurgeSwitch devices maintain nearly the same clamping voltage over the entire peak pulse current range and extended temperature range, using an innovative new architecture.

Initial SurgeSwitch devices will be available with operating voltages of 22V (TDS2211P), 33V (TDS3311P), 45V (TDS4501P), and 58V (TDS5801P). These devices are housed in a small 1.6 x 1.6mm package. They may be used to meet the common industrial voltage surge standard of +/-1kV per IEC61000-4-5 (RS = 42Ω, CS= 0.5μF). Typical applications include VBUS protection of USB PD voltage buses, IO-Link interfaces, industrial sensors, 24V AC lines in Internet of Things (IoT) devices, PLC I/O Modules, Power over Ethernet, and load switch input protection.

Key Features of SurgeSwitch

  • Transient protection for high-speed data lines to: IEC 61000-4-2 (ESD) ±30kV (air), ±30kV (contact); IEC 61000-4-5 (Lightning) 40A (8/20μs)
  • 22V, 33V, 45V, and 58V standoff voltage devices
  • Protects one I/O or VBUS line
  • Very small footprint: 1.6mm x 1.6mm package
  • Pb-Free and RoHS/WEEE compliant


The SurgeSwitch product line of devices is available immediately in production quantities. Semtech offers comprehensive design assistance, including field- and factory-based support. Datasheets, volume pricing and delivery quotes, as well as evaluation kits and samples, are available on the Semtech website.

About Semtech

Semtech Corporation is a leading global supplier of high performance analog and mixed-signal semiconductors and advanced algorithms for infrastructure, high-end consumer and industrial equipment. Products are designed to benefit the engineering community as well as the global community. The Company is dedicated to reducing the impact it, and its products, have on the environment. Internal green programs seek to reduce waste through material and manufacturing control, use of green technology and designing for resource reduction. Publicly traded since 1967, Semtech is listed on the NASDAQ Global Select Market under the symbol SMTC. For more information, visit

Forward-Looking and Cautionary Statements

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Semtech and the Semtech logo are registered trademarks or service marks, and SurgeSwitch and SClamp are trademarks or service marks, of Semtech Corporation and/or its affiliates.