Semtech Corporation SC4910AITSTRT

Overview

SC4910AITSTRT 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, and 20mΩ dynamic resistance. It protects USB PD, USB Type-C VBus, and load switch inputs in industrial and portable electronics.

For engineers reviewing the SC4910AITSTRT datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, DFN-6 package layout guidance, real-world clamping stability across temperature and current, and direct alternatives for EOS-critical designs requiring low-voltage overshoot control.

Technical Context

The SC4910AITSTRT 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-27.5–28V-from 24A to 40A and across –40°C to +125°C due to decreasing R_DS(on) under surge conditions.

It operates with a 22V reverse stand-off voltage (V_RWM) and 25–27.9V breakdown (V_BR), exhibits only 130–600nA leakage at V_RWM, and delivers 175pF junction capacitance at 22V/1MHz-enabling robust protection without signal integrity compromise on high-speed power rails.

Key Specifications

Pinout & Package

SC4910AITSTRT is housed in a RoHS-compliant, halogen-free DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required). All six terminals are surface-mount; pins 1–3 are tied to GND, pins 4–6 serve as the protected input node.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SC4910AITSTRT, TDS2211P.C offers identical performance and form factor as a direct manufacturer-confirmed variant, while uClamp2411ZA.TCT serves distinct low-capacitance signal roles but cannot replace SC4910AITSTRT in 22V power rail protection due to higher, temperature-sensitive clamping and lower surge capacity.

Availability

SC4910AITSTRT is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch inputs, and IoT edge device power rails requiring stable component supply, long-term lifecycle support, and guaranteed EOS protection performance across extended temperature ranges.

Supply support for SC4910AITSTRT 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 semiconductors for power management, protection, sensing, and connectivity.

The SC4910AITSTRT belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered specifically to replace conventional TVS diodes in high-reliability 22V power rail protection where stable clamping, high surge current, and wide-temperature operation are mandatory.

FAQ

What is the exact package type and dimensions of SC4910AITSTRT?

SC4910AITSTRT uses a 6-pin DFN package measuring 1.6mm × 1.6mm × 0.55mm with exposed copper pad (no internal thermal pad). Pin 1–3 are GND; Pin 4–6 are IN. The land pattern follows Semtech's recommended layout with multiple ground vias and direct trace routing from connector to device-critical for achieving full 40A surge capability. SC4910AITSTRT's compact size enables placement directly at USB-C or industrial connector interfaces.

How does SC4910AITSTRT differ from standard TVS diodes in clamping behavior?

Unlike standard TVS diodes whose clamping voltage rises linearly with peak pulse current (V_C = V_BR + I_PP × R_DYN), SC4910AITSTRT maintains a nearly constant 27.5–28V clamping voltage from 24A to 40A and across –40°C to +125°C. This is achieved via a surge-rated FET shunt architecture with decreasing R_DS(on) under surge, making SC4910AITSTRT far more predictable for safety-critical 22V rail protection.

Can SC4910AITSTRT protect both USB PD VBus and CC lines simultaneously?

No-SC4910AITSTRT is optimized for high-current, high-energy protection of power lines like USB PD VBus (22V-rated), not low-capacitance signal lines. For CC/SBU lines, Semtech recommends uClamp2411ZA.TCT (25pF, 24V V_RWM). Using SC4910AITSTRT on CC lines would introduce excessive capacitance (175pF), disrupting USB PD communication timing and voltage detection. SC4910AITSTRT must be applied only to power rails.

What is the maximum operating temperature and thermal derating for SC4910AITSTRT?

SC4910AITSTRT is rated for continuous operation from –40°C to +125°C ambient, with junction temperature up to +150°C. Its clamping voltage remains stable across this full range-unlike TVS diodes, which exhibit rising V_C with temperature. No external heatsink or thermal pad is required; PCB copper pour and multiple ground vias provide sufficient thermal path. SC4910AITSTRT's thermal design eliminates derating concerns for industrial or automotive under-hood applications.

Is SC4910AITSTRT compliant with RoHS, REACH, and halogen-free standards?

Yes-SC4910AITSTRT is Pb-free, halogen-free, and fully compliant with RoHS Directive 2011/65/EU and WEEE Directive 2012/19/EU. Its molding compound meets UL 94V-0 flammability rating, and lead finish is matte tin. The device carries no SVHC substances above threshold per REACH Annex XIV, and conforms to J-STD-609A Class 3 marking for lead-free identification. SC4910AITSTRT supports green manufacturing and global environmental compliance requirements.