Microchip Technology JANTX1N5665A

Overview

JANTX1N5665A from Microchip Technology (formerly Microsemi) is a hermetically sealed, unidirectional transient voltage suppressor (TVS) diode in DO-13 metal package, rated for 1500 W peak pulse power at 10/1000 µs, with 162 V standoff voltage (VWM), 180–190 V breakdown voltage (V(BR)), and 274 V clamping voltage (VC) at 5.5 A peak pulse current. It is designed for military-grade surge protection in avionics, airborne systems, and IEC61000-4-5 secondary lightning environments with 42 Ω source impedance.

For engineers reviewing the JANTX1N5665A datasheet, JANTX1N5665A pinout, JANTX1N5665A application, or JANTX1N5665A equivalent, this device serves as a high-reliability, radiation-hardened TVS for critical aerospace and defense electronics requiring guaranteed performance across –55 °C to +175 °C, sub-100 ps response time, and MIL-PRF-19500/500 JANTX qualification.

Technical Context

The JANTX1N5665A operates as a unidirectional avalanche diode, entering controlled breakdown above its 162 V rated standoff voltage (VWM) to clamp transients while maintaining low leakage (<5 µA at VWM). Its DO-13 hermetic metal-glass package ensures stable thermal resistance (50 °C/W junction-to-lead) and inherent radiation hardness per MicroNote 050.

It delivers 1500 W non-repetitive peak pulse power under 10/1000 µs waveform, with clamping voltage tightly bounded at 274 V at 5.5 A IPP - enabling precise overvoltage margining in high-voltage DC bus protection. The device's ±5% V(BR) tolerance (180–190 V) and 0.108 %/°C temperature coefficient support predictable behavior across extended temperature ranges.

Key Specifications

Pinout & Package

DO-13 (DO-202AA) hermetically sealed metal-glass package with axial leads; cathode terminal electrically bonded to case and marked by diode symbol on body. Lead length 25.4–41.3 mm; case diameter 5.46–5.97 mm; weight ≈1.4 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with JANTX1N5665A, the commercial 1N5665A reduces cost but forfeits military screening and radiation data, while JANTXV1N5665A adds process rigor for zero-defect requirements - making JANTX1N5665A the optimal balance of assured performance, qualification coverage, and procurement availability for defense avionics programs.

Availability

JANTX1N5665A is available at Aetrix Electronics and suitable for aerospace avionics, military vehicle ECUs, satellite power systems, and ruggedized communications equipment requiring stable component supply with full MIL-PRF-19500/500 traceability and radiation assurance.

Supply support for JANTX1N5665A 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

Microchip Technology acquired Microsemi in 2018 and maintains its high-reliability analog and discrete product lines, including military-qualified TVS diodes, for aerospace, defense, and industrial markets.

The JANTX1N5665A belongs to Microchip's legacy Microsemi TVS family designed specifically for mission-critical surge protection in environments where failure is not an option - emphasizing hermetic packaging, radiation tolerance, and MIL-STD compliance.

FAQ

What is the clamping voltage of JANTX1N5665A at its rated peak pulse current?

The JANTX1N5665A has a maximum clamping voltage (VC) of 274 V when subjected to its specified peak pulse current (IPP) of 5.5 A under a 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during a surge event. The JANTX1N5665A maintains this clamping performance across its full military temperature range due to its stable avalanche characteristics and hermetic DO-13 package.

Is JANTX1N5665A suitable for IEC61000-4-5 secondary lightning protection?

Yes, JANTX1N5665A is explicitly rated for IEC61000-4-5 secondary lightning protection with 42 Ω source impedance up to Class 1, as confirmed in the official datasheet. Its 1500 W peak pulse power rating, 274 V clamping voltage, and fast response time ensure compliance in low-to-moderate surge level applications such as airborne avionics and ground-based military comms. The JANTX1N5665A achieves this without derating across –55 °C to +175 °C.

How does the DO-13 package of JANTX1N5665A differ from plastic TVS diodes like 1N6267 series?

The JANTX1N5665A uses a hermetically sealed DO-13 metal-glass package, unlike plastic axial-leaded equivalents (e.g., 1N6267 series), providing superior moisture resistance, thermal stability, and long-term parameter retention. Its metal case serves as the cathode terminal and enables direct thermal coupling to heatsinks or ground planes - critical for sustained surge handling in high-reliability applications. The JANTX1N5665A's DO-13 construction also satisfies MIL-PRF-19500/500 mechanical and environmental requirements that plastic packages cannot meet.

Does JANTX1N5665A require derating for elevated ambient temperatures?

Yes, JANTX1N5665A requires thermal derating above +125 °C lead temperature for its 1 W DC power dissipation rating, as shown in Figure 3 of the datasheet. However, its 1500 W peak pulse power rating remains valid up to +175 °C ambient, provided the 10/1000 µs surge repetition rate stays below 0.01%. The JANTX1N5665A's 50 °C/W junction-to-lead thermal resistance allows effective heat sinking via the cathode-connected case - a key design advantage in high-temp avionics installations.

What is the significance of the "A" suffix in JANTX1N5665A?

The "A" suffix in JANTX1N5665A denotes tighter parametric tolerances - specifically, a ±5% breakdown voltage (V(BR)) range of 180–190 V - compared to the base 1N5665 (±10%). This tighter spec ensures consistent clamping behavior across production lots and is required for precision protection in regulated power systems. All JANTX1N5665A units undergo 100% screening per MIL-PRF-19500/500, and the "A" grade is integral to the JANTX qualification, not an optional variant. The JANTX1N5665A is therefore the standard qualified part, not a derivative.