The G9KB high-capacity power relay from OMRON is rated 600VDC at 50A as standard with an optional 800VDC at 100A higher capacity rated model available (option E), the G9KB relay is capable of bi-directional switching allowing it to replace several conventional relays. The G9KB relay has been designed to address the key challenges presented by energy storage systems and other bi-directional systems that require energy consumption and energy charging to help achieve carbon neutrality and strengthen disaster resilience.
The high-capacity requirement of energy storage systems has led to increases in installation footprints due to the large size of equipment and the shortened life of printed circuit boards and other components which occur as a result of the substantial heat generated inside the equipment which subsequently requires passive and/or active cooling systems. OMRON's power relay G9KB can achieve bidirectional switching with a single unit while retaining high-voltage and high-capacity switching capability (600 VDC, 50 A for standard model and 800 VDC, 100 A for option E model). The G9KB relay allows designers reduce the size and weight of energy storage systems and helps lower heat generation inside the equipment solving installation restrictions and extending the service life of clean energy-related equipment.
OMRON's research demonstrated by replacing 4 conventional power relays in a 600V VDC charging/discharging system with a single G9KB relay reduced the PCB mounting area required by 75% enabling equipment to be smaller and lighter (reduced footprint). At the same time, the reduced initial contact resistance of 5 mΩ or less, up to 47.5% (at 20A energization) lower than the 4 conventional relays, enabled lower heat generation and a more cost-effective overall solution due to higher charging efficiency and longer service life with less cooling requirements.
As devices related to solar power generation and energy storage systems continue to increase in voltage and capacity, the importance of a safe disconnection function is becoming increasingly important. In accordance with this, stringent standard requirements may be requested for PCB relays as well. Although OMRON's G9KB is a PCB relay, it has obtained UL 60947-4-1 and IEC 61810-10 standards with the same structure, which are stringent requirements for switching devices such as contactors, this means it can be reliably applied to safe disconnection applications for energy storage systems.
View the G9KB relays key capabilities
Arc interruption technology
Generally, when turning DC current on or off, an arc occurs between the contacts of a switching device. In bidirectional switching applications such as energy storage systems, it is necessary to interrupt the arc and prevent welding of the contacts even if the direction of the current is reversed. However, it is not easy to design a relay that can safely cut off current in both directions with the same structure, because the direction and characteristics of the arc also change when the direction of current flow changes. The G9KB relay has arc control technology built in using permanent magnets and three-dimensional arc analysis technology (CAE technology) to realize a structure that is not affected by the direction of the current in an air-break type. OMRON's highly reproducible CAE technology has been established through industry-academia collaboration, thereby allowing them to achieve both miniaturization and high capacity with the G9KB relays.
OMRON's G9KB bi-directional PCB power relays can be used in a range of applications such as Power Conditioning Equipment, Energy Storage Systems and EV Chargers including Vehicle to Grid, Building and Home implementations.
Anglia are offering customers FREE samples of the G9KB high-capacity power relay from OMRON, please fill in the form below to register your interest now.
Free samples are subject to availability.
STMicroelectronics has once again raised the bar in motion sensing with the launch of the LSM6DSV320X which is like no other IMU, designed to monitor and safeguard users in their individual surroundings and contexts.
Sensirion has introduced the STCC4, a revolutionary miniature sensor poised to redefine how we monitor indoor air quality.
Omron’s award-winning G9KA-1A-E relay family is redefining high-power switching for energy applications. Engineered for performance, safety, and compactness, this flagship SPST-NO relay handles up to 300A at 1,000V AC, making it ideal for EV chargers, UPS systems, and industrial inverters.
Discover the latest in efficient power conversion with the cost-effective STMicroelectronics DCP3601 buck converter and the STEVAL-3601CV1 evaluation board. The DCP3601 delivers up to 1 A load current across a wide 3.3 V to 36 V input range, making it ideal for diverse industrial applications. Its 1 MHz fixed switching frequency enables compact designs, while advanced EMI management and robust protection features ensure reliable operation even in demanding environments.
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.
The CX Series connector system from HIROSE conforms to the USB standard USB Type-C™, this standard is being widely adopted as a standard interface on many devices found in consumer, industrial and automotive markets.
KYOCERA AVX’s has expanded its 3dB 90° hybrid couplers – the DB0402 adds a miniature 0402 size package to the family which already includes the DB0603, and DB0805 series – engineered to meet the growing demands of high-frequency wireless systems across industrial, automotive, telecommunications, and telemetry sectors.