Semtech Corporation 1N6162

Overview

1N6162 from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection of 22V-rated I/O or power lines, featuring ±30kV IEC 61000-4-2 ESD immunity, 40A peak pulse current (8/20μs), 27.5–28V clamping voltage at 40A, and ultra-low 20mΩ dynamic resistance. It protects USB Type-C power delivery buses, load switch inputs, and industrial I/O interfaces where stable clamping under temperature and current stress is critical.

For engineers reviewing the 1N6162 datasheet, pinout, applications, or equivalent options, this device offers superior clamping stability versus conventional TVS diodes-especially in high-temperature, high-surge environments like USB PD controllers, IoT edge nodes, and industrial e-fuse front-ends.

Technical Context

The 1N6162 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 standard TVS diodes, its clamping voltage remains nearly constant across 24–40A (8/20μs) due to decreasing R_DS(on) under surge conditions.

It operates over −40°C to +125°C with <28V clamping at full rated current and maintains stable performance up to +125°C-unlike conventional TVS devices whose clamping rises with temperature and current. Its 175pF junction capacitance at 22V and 1MHz supports moderate-speed data line integration without signal integrity compromise.

Key Specifications

Pinout & Package

1N6162 is housed in a Pb-free, RoHS-compliant DFN package measuring 1.6mm × 1.6mm × 0.55mm with six terminals. The compact footprint delivers board space savings over traditional SOD-123 or SMA TVS solutions while supporting high-current surge handling via parallel pin configuration.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and TPD2E007DRYR, the 1N6162 uniquely delivers 22V working voltage, 40A surge rating, and thermally stable sub-28V clamping-making it the only option among the three qualified for USB PD VBUS and industrial load switch front-end protection.

Availability

1N6162 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT edge node power rails requiring stable component supply, long-term lifecycle support, and compliance with IEC 61000-4-2/4-4/4-5 standards.

Supply support for 1N6162 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 signal integrity.

The 1N6162 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability power and interface protection applications demanding stable clamping under thermal and current stress.

FAQ

What is the primary protection function of the 1N6162?

The 1N6162 functions as a transient diverting suppressor that actively shunts high-energy electrical overstress (EOS) events-including ESD, EFT, and lightning-induced surges-to ground using a surge-rated FET. Unlike passive TVS diodes, it maintains a near-constant 27.5–28V clamping voltage across its full 40A (8/20μs) surge rating and operating temperature range (−40°C to +125°C), making it ideal for protecting sensitive 22V power rails and interfaces.

Does the 1N6162 require external bias or control signals to operate?

No, the 1N6162 is fully autonomous and requires no external bias, enable signals, or configuration. Its internal precision trigger circuit detects overvoltage conditions above ~25V breakdown and automatically activates the shunt FET. This self-contained operation makes the 1N6162 drop-in compatible with existing TVS placements-no changes to control logic or PCB routing are needed beyond proper grounding and layout per Semtech's guidelines.

How does the 1N6162 compare to standard TVS diodes in terms of temperature stability?

The 1N6162 exhibits exceptional temperature stability: its clamping voltage remains within 27.5–28V from −40°C to +125°C at 40A, whereas standard TVS diodes like SMAJ22A show significant clamping rise (e.g., >38V at 125°C). This stability stems from the FET-based architecture-the trigger circuit sets the clamp level, and R_DS(on) decreases with current, counteracting thermal effects. As a result, the 1N6162 eliminates derating uncertainty in hot industrial environments.

Can the 1N6162 be used on high-speed data lines such as USB SuperSpeed or PCIe?

No, the 1N6162 is not suitable for high-speed data lines due to its 175pF junction capacitance at 22V, which would severely degrade signal integrity on differential pairs operating above ~100Mbps. It is specifically designed for DC power rails (e.g., USB PD VBUS, load switch inputs) and low-speed control lines. For SuperSpeed lanes, Semtech recommends low-capacitance devices like RClamp3371ZC (<0.25pF), used alongside the 1N6162 in layered protection architectures.

What is the recommended PCB layout practice for optimal 1N6162 performance?

For optimal 1N6162 performance, place the device as close as possible to the protected connector or entry point. Connect all three IN pins (4,5,6) with a single short, wide trace to minimize inductance; likewise, tie all three GND pins (1,2,3) directly to a solid ground plane using multiple vias. Avoid thermal relief on GND pads. Do not add an external thermal pad-the device dissipates energy internally, and excessive copper can reduce surge impedance matching. Follow Semtech's land pattern (1.6×1.6mm DFN) precisely.