The Omron G6QG is a cutting-edge, compact PCB-mounted power relay engineered for high-performance switching in space-constrained environments. It stands out as the smallest relay in the industry capable of handling AC loads up to 480V and 55A, making it a powerful solution for demanding applications such as DC fast chargers, energy storage systems, and EV infrastructure.
Managing heat in high-current switching components is a critical challenge for developers, especially in compact systems like DC fast chargers and energy storage platforms. The G6QG relay addresses this issue utilising Omron's design know-how with a multi-pronged thermal optimisation strategy rooted in advanced materials and structural design.
Omron has applied proprietary material technology to minimise the resistance along the current-carrying path. Lower resistance means less energy is lost as heat during operation, which directly contributes to cooler relay performance under load.
The coil-side terminals—often a hotspot during energisation—have also been widened. This design change increases the surface area available for heat dissipation, allowing thermal energy to spread more efficiently and reducing the peak temperature at the terminals.
Finally, the G6QG's internal layout has been optimised to facilitate passive cooling, leveraging Omron’s experience in compact relay design. This includes strategic placement of conductive materials and thermal pathways that draw heat away from sensitive areas.
Coil-side terminal construction
The Omron G6QG relay is engineered to deliver exceptional performance in demanding power switching environments. With the ability to interrupt loads of 480VAC at 55A, it is not only ideal for single-phase power supply systems, but also robust enough to support three-phase applications.
Despite its high current handling capability, the G6QG maintains a remarkably compact form factor of just 30.5 x 20.5 x 16.0 mm. This miniature footprint allows for space-efficient PCB layouts, making it a preferred choice for developers working within tight design constraints.
The relay features a contact gap of 2 mm or more, aligning with the IEC 62109 standard—a critical safety requirement for photovoltaic (PV) inverter applications. This ensures reliable isolation and minimises the risk of arcing, giving developers confidence in its suitability for solar energy systems.
Internal construction contact area
The Omron G6QG relay offers a robust combination of electrical endurance, thermal resilience, and application versatility. With coil voltage options available in 12 VDC and 24 VDC, providing flexibility for integration into a wide range of control systems, the relay is capable of handling 55A at 480VAC, both as a maximum switching current and a rated carry current, even at elevated ambient temperatures of 85°C.
The G6QG features a high 10 kV impulse withstand voltage (1.2 x 50 µs) between coil and contacts, ensuring robust insulation and protection against transient surges and has excellent mechanical durability rated for 100,000 minimum mechanical operations, supporting long-term reliability in repetitive switching environments. Electrical endurance is rated for 10 operations minimum at full load (55A at 480VAC), 30,000 operations minimum at 20A make and break at 480VAC, offering extended service life under moderate load conditions.
Its combination of high switching capacity, compact size, and compliance with international safety standards makes the G6QG an ideal solution for a range of applications including DC Fast Chargers (HPC), Battery Energy Storage Systems (BESS), Hybrid PV systems, Industrial inverters, Control panels and Smart grid infrastructure.
Anglia are offering customers FREE samples of the G6QG compact high-power relay from OMRON, please fill in the form below to register your interest now.
Free samples are subject to availability.
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