J-D2A-300M

The J-D2A-300M is a non-latching electromechanical relay manufactured by Leach International Corporation, a recognized provider of high-reliability switching and power distribution components for aerospace, defense, and industrial markets. Featuring a 2-pole double-throw (2PDT) contact arrangement, this relay is rated for 12-amp switching capability, making it suitable for handling moderate power loads in both AC and DC circuits. The sealed relay construction provides robust environmental protection against moisture, vibration, and altitude extremes, consistent with military and aerospace-grade packaging. Typical coil voltage options align with common aircraft power systems (such as 28 Vdc), though exact specifications are defined by the full part number suffix and applicable military performance standards.

Typical applications include primary and secondary power distribution, flight control surface actuation, avionics bay switching, and circuit protection in fixed-wing and rotary-wing platforms, as well as ground-based defense systems and high-reliability industrial controls. The non-latching design ensures the contacts return to a predetermined safe state upon coil de-energization—a fail-safe behavior often required in safety-critical systems. Procurement for this category demands careful attention to long lead times, minimum order quantities, and full traceability documentation. As a military/aerospace-grade component, counterfeit mitigation and sourcing through OEM-authorized channels are essential to preserve warranty and performance integrity. Design and supply chain teams should verify the current production status and identify form-fit-function alternates to manage potential obsolescence risks over the extended lifecycle of the host platform.