Semtech Corporation JANTX1N6157AUS

Overview

JANTX1N6157AUS from Microsemi (now part of Microchip Technology) is a military-grade transient voltage suppression diode designed for high-reliability EOS/ESD protection of 22V DC power and signal lines. It delivers ±30kV IEC 61000-4-2 ESD immunity, clamps at 28V under 40A 8/20μs surge, maintains stable clamping across –55°C to +125°C, and uses solid-state FET-based shunt architecture instead of conventional PN-junction TVS.

For engineers reviewing the JANTX1N6157AUS datasheet, pinout, applications, or equivalent options, this device is evaluated for USB Type-C PD bus protection, industrial load switch input hardening, IoT interface surge resilience, and high-temperature embedded power rail safeguarding where constant clamping voltage and low dynamic resistance (<20 mΩ) are critical.

Technical Context

JANTX1N6157AUS implements a precision-triggered, surge-rated MOSFET as its primary protection element - not a standard avalanche diode. A dedicated trigger circuit senses overvoltage and activates the low-R_DS(on) shunt FET, enabling near-constant clamping voltage independent of peak pulse current magnitude or ambient temperature.

Unlike conventional TVS diodes whose V_C = V_BR + I_PP × R_DYN rises linearly with current and temperature, JANTX1N6157AUS sustains ≤28V clamping from 24A to 40A (8/20μs) and across –55°C to +125°C, with dynamic resistance specified at 20 mΩ and junction capacitance at 175 pF @ 22V.

Key Specifications

Pinout & Package

Package: DFN 1.6 mm × 1.6 mm × 0.55 mm, 6-lead, RoHS-compliant, Pb-free, 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 JANTX1N6157AUS, TDS2211P offers identical electrical performance in commercial environments but lacks military screening, while SP3022-01ETG trades clamping stability and ESD robustness for broader industry familiarity and lower unit cost - making JANTX1N6157AUS the sole choice for mission-critical, high-temperature, or radiation-resilient deployments.

Availability

JANTX1N6157AUS is available at Aetrix Electronics and suitable for USB Type-C PD interfaces, industrial programmable logic controllers, remote utility meters, robotics motor drive subsystems, and aerospace avionics requiring stable component supply under extended temperature and high-reliability conditions.

Supply support for JANTX1N6157AUS 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

Microsemi (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal ICs for aerospace, defense, and industrial markets.

JANTX1N6157AUS belongs to Microsemi's JAN/JANTX-series transient suppressors - engineered specifically for MIL-PRF-19500/565 compliance, extended temperature operation, and sustained surge resilience in safety-critical systems.

FAQ

What is the maximum clamping voltage of JANTX1N6157AUS under full-rated surge conditions?

JANTX1N6157AUS clamps at 28 V maximum when subjected to 40 A peak pulse current with an 8/20 μs waveform. This value is guaranteed across the full operating temperature range (–55°C to +125°C) and remains stable due to its FET-based shunt architecture - unlike conventional TVS diodes whose clamping voltage rises with current and temperature. The 28 V clamping ensures compatibility with 30 V absolute maximum rated components commonly used in USB PD and industrial control ICs.

Does JANTX1N6157AUS require external biasing or control signals to operate?

No, JANTX1N6157AUS is a fully passive, self-triggering device. It contains an integrated precision trigger circuit and surge-rated MOSFET that activate automatically when transient voltage exceeds the breakdown threshold (~27.9 V). No external power, enable signal, or configuration is needed - it functions identically to a TVS diode in placement and operation, but with superior clamping behavior. This makes JANTX1N6157AUS drop-in compatible with existing TVS footprints requiring only layout optimization for low-inductance grounding.

How does JANTX1N6157AUS differ from standard TVS diodes like SMAJ22A in surge response?

JANTX1N6157AUS uses a triggered MOSFET shunt instead of a PN-junction avalanche structure. As a result, its clamping voltage stays nearly constant (27.5–28 V) from 24 A to 40 A surge current and across –55°C to +125°C, whereas SMAJ22A exhibits rising clamping (e.g., ~42 V at 40 A) and significant thermal derating above 85°C. JANTX1N6157AUS also achieves lower dynamic resistance (20 mΩ vs. ~150 mΩ), reducing overshoot during fast transients - a critical advantage in protecting sensitive gate drivers and PD controllers.

Can JANTX1N6157AUS be used on high-speed data lines such as USB SuperSpeed differential pairs?

No, JANTX1N6157AUS is not suitable for USB SuperSpeed (5 Gbps) or other high-speed serial data lines due to its 175 pF junction capacitance, which would severely degrade signal integrity. It is intended for DC power rails (e.g., V_Bus, 24V aux), control lines (EN, OVP), and medium-speed interfaces like USB CC/SBU or RS-485. For SuperSpeed lanes, low-capacitance TVS devices such as Semtech RClamp3371ZC (<0.25 pF) must be used alongside JANTX1N6157AUS in a layered protection scheme.

Is JANTX1N6157AUS compliant with RoHS and REACH regulations?

Yes, JANTX1N6157AUS is RoHS-compliant (lead-free, halogen-free) and meets REACH SVHC requirements. Its DFN package uses Pb-free solderable terminations and UL 94V-0 flame-retardant molding compound. Compliance documentation, including material declarations and test reports, is available through Microchip's official product page and Aetrix Electronics' technical support portal for JANTX1N6157AUS.