Microchip Technology JANTXV1N5637A

Overview

JANTXV1N5637A from Microchip Technology is a hermetically sealed, unidirectional transient voltage suppressor (TVS) diode in DO-13 metal package, designed for high-reliability aerospace and military systems. It features 12.1 V rated standoff voltage (VWM), 13.5 V minimum breakdown voltage (V(BR)), and clamps transients to ≤22.0 V at 68 A peak pulse current (IPP), delivering 1500 W peak pulse power per 10/1000 µs waveform.

For engineers reviewing the JANTXV1N5637A datasheet, JANTXV1N5637A pinout, JANTXV1N5637A application, or JANTXV1N5637A equivalent, this device serves as a radiation-hardened, fast-response protection element for avionics power rails, MIL-STD-1275 engine-start transients, and IEC61000-4-5 secondary lightning surge suppression with 42 Ω source impedance.

Technical Context

The JANTXV1N5637A operates as a unidirectional avalanche diode, entering controlled breakdown when reverse voltage exceeds its 13.5–14.3 V V(BR) range at 1 mA test current. Its <100 ps response time enables sub-nanosecond clamping during ESD (IEC61000-4-2) and EFT (IEC61000-4-4) events.

Rated for -55°C to +175°C operation and qualified per MIL-PRF-19500/500, it uses a welded, hermetic DO-13 metal-glass package with cathode-to-case polarity. Thermal resistance is 50°C/W junction-to-lead (0.375" from body), supporting robust surge handling without thermal runaway under repetitive low-duty-cycle transients.

Key Specifications

Pinout & Package

Hermetic DO-13 (DO-202AA) metal-glass package with axial leads; cathode terminal electrically connected to case and marked by diode symbol on body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar unidirectional TVS applications.

Compared with SMCJ12A and JANTXV1N5636A, the JANTXV1N5637A uniquely balances 12.1 V standoff compatibility with 22.0 V clamping headroom for 28 V avionics, while retaining full hermeticity and MIL-PRF-19500/500 Class V compliance-critical for flight-critical hardware where zero field failures are mandated.

Availability

JANTXV1N5637A is available at Aetrix Electronics and suitable for avionics power conditioning, MIL-STD-1275B-compliant vehicle electronics, and radiation-tolerant spacecraft subsystems requiring stable component supply across extended production lifecycles.

Supply support for JANTXV1N5637A 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 (formerly Microsemi) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The JANTXV1N5637A belongs to Microchip's legacy military-qualified TVS diode family, engineered specifically for survivability in extreme electromagnetic environments-including airborne, ground-mobile, and space-based platforms subject to lightning, EMP, and ESD threats.

FAQ

What is the maximum clamping voltage of the JANTXV1N5637A under standard surge conditions?

The JANTXV1N5637A exhibits a maximum clamping voltage (VC) of 22.0 V when subjected to its rated 68 A peak pulse current (IPP) under the 10/1000 µs waveform defined in IEC61000-4-5. This value is measured at TA = 25°C and ensures downstream 28 V-rated components remain within safe operating limits during transient events. The JANTXV1N5637A maintains this clamping performance across its full -55°C to +175°C operating range with minimal drift.

Is the JANTXV1N5637A suitable for bidirectional transient protection?

No, the JANTXV1N5637A is a unidirectional TVS diode optimized for DC or positively biased circuits. Its cathode is internally connected to the metal case, and it conducts only in reverse avalanche mode. For bidirectional protection in AC-coupled or floating signal lines, Microchip offers the separate 1N6036–1N6072A series in the same DO-13 package. Using JANTXV1N5637A in bidirectional configurations risks forward conduction failure or inadequate positive-swing suppression.

Does the JANTXV1N5637A require heatsinking in typical applications?

While the JANTXV1N5637A has a junction-to-lead thermal resistance of 50°C/W, heatsinking is not required for single-event surge suppression due to its low duty cycle (<0.01%). However, for repetitive surge scenarios (e.g., frequent engine starts), mounting the cathode (case) to a grounded copper pour ≥4 mm² on FR4 provides critical thermal relief. The JANTXV1N5637A's hermetic DO-13 package relies on lead conduction-not ambient convection-for transient power dissipation.

How does the JANTXV1N5637A meet IEC61000-4-5 secondary lightning standards?

The JANTXV1N5637A is certified for IEC61000-4-5 secondary lightning protection with 42 Ω source impedance up to Class 1 (1 kV), and with 12 Ω source impedance up to Class 1 (1 kV) per the manufacturer's application guidance. Its 1500 W peak pulse rating and ≤22.0 V clamping voltage ensure compliance when used with appropriate series impedance-enabling robust protection for avionics and vehicle ECUs without additional passive filtering. The JANTXV1N5637A's performance is validated across all specified impedance classes in the official datasheet.

What is the significance of the "JANTXV" prefix in JANTXV1N5637A?

The "JANTXV" prefix denotes full compliance with MIL-PRF-19500/500 Class V requirements, including extended temperature screening (-55°C to +175°C), hermeticity testing, burn-in, and lot traceability. Unlike commercial "1N5637A" variants, the JANTXV1N5637A undergoes rigorous military-level qualification to guarantee performance in mission-critical defense and aerospace systems. This prefix confirms that every JANTXV1N5637A unit is individually tested and certified to meet these stringent reliability standards.