Schneider Electric / Magnecraft Industrial Relays and Sockets

Engineering Standards and Heritage of Schneider Electric / Magnecraft Relays

Magnecraft was established in Chicago in 1951, focusing on the development of durable electromechanical relays for demanding industrial environments.

Following integration into the global Schneider Electric organization, the engineering portfolio combines American industrial heritage with European safety standards. The range covers miniature ice cube relays, heavy power switching blocks, octal plug-in devices and solid state controllers.

Gold-flashed silver alloy contacts maintain low interface resistance during low-level logic switching as well as heavy motor actuator operations.

Miniature Ice Cube Relays: 782 Series Architecture and M4L Indication

The 782 series miniature power relays feature a two-pole double-throw DPDT contact arrangement rated for continuous currents up to 15 A. Full-feature M4L models incorporate a mechanical flag indicator, a bright LED status lamp and a lockable manual test lever.

This design enables field technicians to inspect circuit status instantly and verify logic sequences without applying power to the coil. Transparent polycarbonate covers allow visual monitoring of internal contact blades.

Coils are available for DC control levels at 12, 24, 110 V and AC mains at 24, 120, 240 V.

Heavy-Duty 788 Series Relays for Demanding Inductive Load Circuits

The 788 series power relays are designed to switch demanding AC loads up to 300 V and currents up to 16 A. An expanded air gap between contact points prevents continuous arcing during repetitive cycles of hydraulic valve solenoids, magnetic brakes and starter contactors.

Dielectric insulation withstand between coil and contact assemblies reaches 2500 V, eliminating flashover from high-voltage transient spikes on plant power lines. The relays maintain stable switching performance across broad temperature variations in continuous industrial machine tool cabinets.

Octal Base 750 Series Relays: Circular Pinout and Shock Resistance

The 750 series plug-in relays utilize a standardized 8-pin circular octal pinout that has served as a benchmark in industrial power distribution. A keyed center locating post prevents incorrect orientation when replacing units during plant maintenance routines.

DPDT contact sets handle loads up to 10 A across automation control loops. When installed into companion 70-750 DIN-rail sockets, the assemblies utilize spring-steel retaining clips that prevent modules from dislodging under continuous vibrations from stamping presses and metalworking machinery.

Solid State Switching: 861 SSR Series with Optical Isolation

The 861 SSR series delivers contactless switching of AC circuits up to 10 A using antiparallel SCR thyristors. The absence of mechanical contacts guarantees silent operation, zero arc generation and virtually unlimited operational endurance.

The DC control input circuit is galvanically separated from the power side by a 4000 V optical barrier layout. A narrow modular housing measuring under 18 mm in width permits high-density multi-channel DIN-rail installation within industrial heater control panels and temperature regulation cubicles.

Mounting Sockets 70 Series and 16-700DIN Aluminum Rails for Enclosures

Secure installation of Magnecraft relays relies upon 70 series sockets equipped with elevator-type screw terminals. The box clamp mechanism distributes pressure evenly across wire strands, preventing conductor damage during tightening.

Touch-safe IP20 terminal shroud geometry shields personnel from live parts. Sockets mount onto precision extruded aluminum DIN rail profiles 16-700DIN measuring 1000 mm in length.

The rails provide high bending rigidity and corrosion resistance in humid factory atmospheres, simplifying cabinet panel layout.