Semtech Corporation 1N6141

Overview

1N6141 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 24–40A, and 20mΩ dynamic resistance - deployed in USB Type-C PD input protection and industrial load switch front-end circuits.

For engineers reviewing the 1N6141 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, DFN-6 package layout guidance, functional role in surge-shunting architecture, and direct alternatives for 22V bus protection where constant clamping voltage across temperature and current is critical.

Technical Context

The 1N6141 implements a precision-triggered shunt FET architecture instead of conventional PN-junction TVS diodes, enabling near-constant clamping voltage (27.5–28V) across 24–40A IPP and −40°C to +125°C operating range. Its trigger circuit activates the low-R_DS(on) FET when transient voltage exceeds breakdown, bypassing energy to ground via three parallel IN pins.

Unlike standard TVS devices whose V_C rises linearly with I_PP due to fixed R_DYN, the 1N6141's dynamic resistance drops with increasing current (20mΩ typical), resulting in stable clamping independent of surge magnitude or ambient temperature - confirmed by test data showing <0.5V variation from −40°C to +125°C at 40A.

Key Specifications

Pinout & Package

1N6141 is housed in a Pb-free, RoHS-compliant DFN-6 package measuring 1.6mm × 1.6mm × 0.55mm with exposed thermal pad (no internal thermal pad required per datasheet). All six terminals are electrically active and must be connected for full 40A rating.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A and TPD2E001DRYR, the 1N6141 uniquely delivers stable 27.5–28V clamping across 40A and −40°C to +125°C - making it the only option among the three qualified for sustained industrial surge immunity and USB PD bus protection without thermal derating.

Availability

1N6141 is available at Aetrix Electronics and suitable for USB Type-C PD designs, industrial load switch front-ends, notebook DC inputs, and IoT gateway 24V rail protection requiring stable component supply and long-term lifecycle support.

Supply support for 1N6141 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 1N6141 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 clamping voltage stability across temperature and current is non-negotiable.

FAQ

What is the primary protection function of the 1N6141?

The 1N6141 functions as a transient diverting suppressor that shunts high-energy electrical overstress (EOS) events-such as ESD, lightning surges, and EFT-to ground using a precision-triggered FET. Unlike TVS diodes, it maintains a stable 27.5–28V clamping voltage across its full 40A rating and operating temperature range, ensuring consistent protection for 22V systems like USB PD buses and industrial power inputs.

Does the 1N6141 require a thermal pad on the PCB?

No, the 1N6141 does not require an external thermal pad. According to Semtech's datasheet, energy dissipation occurs within the device structure during transients, and no thermal pad is needed. Instead, design emphasis is placed on low-inductance grounding: all three GND pins (1, 2, 3) must connect to a solid ground plane using multiple vias, and all three IN pins (4, 5, 6) must be routed in parallel to maximize current sharing and surge handling capability for the 1N6141.

Can the 1N6141 be used on high-speed data lines like USB 3.2 or PCIe?

No, the 1N6141 is not suitable for high-speed data lines. Its 175pF junction capacitance at 22V would severely degrade signal integrity above ~100MHz. It is intended exclusively for DC or low-frequency power rails (e.g., USB-C VBUS, load switch inputs, 24V IoT power inputs). For SuperSpeed USB, DisplayPort, or PCIe lanes, low-capacitance ESD protectors such as RClamp3371ZC (<0.25pF) must be used alongside the 1N6141 in a layered protection scheme.

How does the 1N6141 differ from a standard TVS diode like SMAJ22A?

The 1N6141 uses a surge-rated FET with a precision trigger circuit, yielding near-constant clamping voltage (27.5–28V) across 24–40A and −40°C to +125°C. In contrast, SMAJ22A is a PN-junction TVS diode whose clamping voltage rises linearly with current and temperature - reaching ~38V at 24A and 125°C. This makes the 1N6141 far more reliable for protecting voltage-sensitive ICs in thermally demanding or high-surge environments.

What is the correct PCB layout practice for optimal 1N6141 performance?

Place the 1N6141 as close as possible to the protected connector (e.g., USB-C receptacle) to minimize trace inductance. Route all three IN pins (4, 5, 6) together in a single straight trace to the protected line, and connect all three GND pins (1, 2, 3) directly to a low-impedance ground plane using ≥4 vias. Avoid stubs, bends, or splits in the IN/GND paths - parasitic inductance degrades clamping response and increases overshoot during fast ESD events for the 1N6141.