Schneider Electric RSB1A120F7 Harmony Electromechanical Relay, 12A, 1CO, 120V AC, IP40

Description

Features

• Equipped with an optimized alternating-current control coil designed for standard 120V AC systems at 50/60 Hz, this module functions effortlessly within typical industrial control loops. With an average low coil power consumption of just 0.75 VA and a reliable operating pickup window between 96V and 180V AC, it easily prevents excessive panel thermal buildup while safely buffering upstream logic systems.
• This electromechanical relay features a single Changeover (1 C/O) contact arrangement, equivalent to a Single-Pole Double-Throw (SPDT) architecture. Out of the box, it provides one Normally Open (NO) path and one Normally Closed (NC) path operating off a unified common terminal, giving automation programmers maximum physical wiring versatility for simultaneous state-signaling and load-switching.
• Despite its compact frame, the heavy-duty silver-nickel (AgNi) alloy contacts are certified to continuously carry a 12A conventional enclosed thermal current. Rated for up to 250V AC/28V DC operations under demanding AC-1/DC-1 conditions, it safely switches maximum resistive capacities up to 3,000 VA or 336 W, making it ideal for interfacing with PLC input/output loops, pilot lights, and inductive motor-starter coils.
• Molded with a transparent structural polycarbonate shell meeting IP40 ingress protection benchmarks, this relay allows maintenance personnel to carry out quick visual safety diagnostics without removing the device from its base socket. The clear view provides instant confirmation of contact position, mechanical alignment, and clean terminal engagement, significantly speeding up routine electrical preventative maintenance cycles.
• Engineered for continuous high-cycle operations in demanding material handling and HVAC-R environments, this unit delivers an exceptional mechanical durability threshold of 10,000,000 cycles. Under a full 12A resistive load, the high-integrity silver contact tips are rated to survive at least 100,000 complete electrical operations at full load capacity, guaranteeing years of maintenance-free service.
• This interface component features balanced operational response times, taking a maximum of 20 milliseconds to fully engage the contacts upon coil energization and a crisp 20 milliseconds to reset to its baseline state once the 120V AC control signal drops below the 18V AC drop-out threshold. This fast mechanical sweep ensures sharp, low-latency signaling transitions that prevent downstream software timing errors in your automated sequences.

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Specifications