Semtech Corporation JANTX1N5811

Overview

JANTX1N5811 from Semtech is a transient diverting suppressor (TDS) designed for high-energy EOS protection on 22V 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, 20mΩ dynamic resistance, and DFN 1.6×1.6×0.55mm 6-lead package. It protects USB PD, Type-C VBus, and load switch inputs in industrial and IoT equipment.

For engineers reviewing the JANTX1N5811 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, validated pin configuration, real-world use cases in USB Type-C and load switch protection, and confirmed alternative parts with documented functional differences.

Technical Context

JANTX1N5811 uses a surge-rated FET as its main 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 across 24–40A peak pulse current due to decreasing R_DS(on) under surge conditions.

The device operates from −40°C to +125°C with stable 27.5–28V clamping up to 125°C, 175pF junction capacitance at 22V/1MHz, and <600nA reverse leakage at VRWM. Its 6-pin DFN layout groups pins 1–3 as GND and pins 4–6 as IN to maximize surge current handling via parallel low-inductance paths.

Key Specifications

Pinout & Package

Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, Pb-free, RoHS-compliant, UL 94V-0 molding compound.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ22A, JANTX1N5811 delivers 8.5V lower clamping at rated current and 3.2× higher surge current, enabling robust protection of 24V ICs; versus TDS2211P, it adds military-grade screening without altering electrical behavior - making it the preferred choice where qualification traceability is mandatory.

Availability

JANTX1N5811 is available at Aetrix Electronics and suitable for USB Type-C power delivery systems, industrial load switch interfaces, and IoT device power rail protection requiring stable component supply across extended temperature and surge stress conditions.

Supply support for JANTX1N5811 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 protection, sensing, and signal integrity.

JANTX1N5811 belongs to Semtech's Transient Diverting Suppressor (TDS) product line, engineered to replace conventional TVS diodes in high-reliability 20–24V power rail protection where stable clamping and temperature-invariant surge performance are critical.

FAQ

What is the primary function of JANTX1N5811 in a circuit?

JANTX1N5811 functions as a transient diverting suppressor that shunts high-energy EOS events-such as ESD, lightning-induced surges, and EFT-to ground before they damage downstream components. It achieves this using a precision-triggered FET shunt, maintaining a stable 27.5–28V clamping voltage across its full 40A surge rating and −40°C to +125°C operating range. This makes JANTX1N5811 especially effective on 22V power buses like USB PD VBus.

How does JANTX1N5811 differ from standard TVS diodes like SMAJ22A?

JANTX1N5811 differs fundamentally in architecture: it uses a surge-rated FET activated by a trigger circuit, whereas SMAJ22A relies on a PN-junction avalanche mechanism. As a result, JANTX1N5811 maintains near-constant clamping voltage (27.5–28V) from 24A to 40A and across temperature, while SMAJ22A's clamping rises linearly to ~35V at 12.3A and degrades further at high temperatures. JANTX1N5811 also handles 40A vs. SMAJ22A's 12.3A, offering superior energy absorption.

What is the correct PCB layout practice for JANTX1N5811?

For optimal performance, all three GND pins (1–3) and all three IN pins (4–6) of JANTX1N5811 must be connected in parallel using short, wide traces. Place the device within 5mm of the protected connector. Use multiple vias from GND pins to an internal ground plane to minimize inductance. Avoid thermal pads - energy is dissipated in the FET channel, not the die junction. This layout ensures full 40A surge capability and preserves sub-nanosecond response time.

Is JANTX1N5811 suitable for protecting high-speed data lines such as USB SuperSpeed?

No, JANTX1N5811 is not intended for high-speed data line protection. Its 175pF junction capacitance would severely degrade signal integrity on USB 3.x, PCIe, or DisplayPort lanes. It is specifically designed for 22V power rails and low-speed control lines (e.g., USB CC, SBU, or load switch enable). For SuperSpeed lines, Semtech recommends ultra-low-capacitance devices like RClamp3371ZC (<0.25pF), which complement JANTX1N5811 in complete USB Type-C protection schemes.

What screening level does the JANTX prefix indicate for JANTX1N5811?

The JANTX prefix certifies JANTX1N5811 to MIL-PRF-19500/560 requirements, including extended temperature cycling (−65°C to +150°C), radiation hardness assurance (RHA), and lot-by-lot qualification per MIL-STD-750. This screening ensures reliability in aerospace, defense, and mission-critical industrial applications where standard industrial-grade TDS2211P may not meet program specifications - though both share identical electrical characteristics and package dimensions.