Solderable, board-mount replacement for traditional contactors saves space and eases assembly
Hoofddorp, The Netherlands, 8 October 2025. OMRON Electronic Components Europe has introduced a 300A 1000V relay with auxiliary contact, delivering a PCB-mount alternative to high-current electromagnetic contactors in systems for power conversion and control. With a footprint of 56.7mm x 61.0mm, and 58.4mm high, the G9KA-1A1B-E announced today has a compact outline and permits easy, solderable assembly.
Relays in the 30A-300A range are becoming more widely chosen in preference to conventional contactors in industrial automation and electrification projects. Designers are opting for their compact dimensions and fast, efficient on-board assembly with soldered connections, to deliver systems that are more affordable, usable, and reliable.
The G9KA-1A1B-E from OMRON is among the first high-current relays in the market to provide an auxiliary connection, commonly provided in contactors. The auxiliary mirrors the main contact to fulfil roles such as a safety indicator, interlock controller, sequencing trigger, or logic signal for interacting with external systems. With these features, the G9KA-1A1B-E is suited to safety and control switching in industrial, utility, and general power-conversion markets. Applications include industrial inverters, inverters for solar generators and energy storage systems (ESS), fast chargers for electric vehicles (EVs), power supply units (PSUs), and uninterruptible power supplies (UPS).
The single-pole single-throw (SPST) relay main contact is normally open (NO). The 1A/30V auxiliary contact is normally closed (NC) and opens when the main contact is activated. The main switch has initial resistance below 0.2mΩ, helping preserve system efficiency and minimizing internal heat generation. Also featuring a high-dissipation internal structure, the G9KA-1A1B-E ensures outstanding reliability and minimal PCB temperature rise in sustained high-power operation.
Designed with a contact gap of at least 4.0mm, the G9KA-1A1B-E meets the German industry standard for automatic grid-disconnection devices in photovoltaic installations, specified in VDE 0126. The auxiliary contact meets the international safety standard IEC/EN 60947-4-1 and ensures high reliability, with bifurcated terminals and minimum rated lifetime of 100,000 operations.
The G9KA-1A1B-E expands OMRON’s family of high-power board-mount relays that now includes a total of eight variants spanning ratings from 40A to 300A, 250V to 1000V. With maximum current and voltage of 300A and 1000V, the G9KA-1A1B-E has the highest rating, equivalent to the G9KA-1A-E single-channel relay, and is the first in the family above 50A to feature the auxiliary contact.
For more information: G9KA | PCB Power Relays | OMRON Device ＆ Module Solutions – Europe
Web: https://components.omron.com/eu-en
LinkedIn page: https://www.linkedin.com/company/omron-electronic-components-europe-b-v-/
About OMRON Electronic Components Europe
On 1 April 2022, OMRON Corporation announced that its’ Electromechanical Components (EMC) division was renamed as OMRON Device and Module Solutions (DMS) in line with the global long-term vision ” Shaping the Future 2030.”
OMRON Electronic Components Europe is the European subsidiary of the Device and Module Solutions division. The revised division name reflects a new focus on delivering solutions to customers globally and in Europe. Society is facing new social and environmental changes, and OMRON recognises and is responding to that. The company aims to offer its’ customers solutions that help them address these universal challenges. In accordance with the long-term strategy, OMRON intends to contribute further to the roll-out of new energy sources and of high-speed communications by enabling the creation of sturdier, advanced and more efficient devices. These devices will make people’s lives easier and better, in particular by achieving carbon neutrality, realizing a digital society and extending healthy life expectancy.
OMRON Electronic Components Europe strongly supports its customers in Western and Eastern Europe through 8 regional offices, a network of local offices and partnerships with specialist, local, regional and global distributors.
About OMRON Corporation
OMRON Corporation is a leading automation company with its core competencies in Sensing & Control + Think technology, and is engaged in a wide range of businesses including industrial automation, healthcare, social systems, and electronic components. Established in 1933, OMRON has about 30,000 employees worldwide, working to provide products and services in more than 130 countries and regions. For more information, please visit www.omron.com/global/en/
For further information please contact:
Marketing Support Group
OMRON Electronic Components Europe B.V.
Wegalaan 57, 2132 JD, Hoofddorp, The Netherlands
Tel: +31 235 681 296, Fax: +31 235 681 222
Email: info-components-eu@omron.com
Web: https://components.omron.com/eu-en
LinkedIn page: https://www.linkedin.com/company/omron-electronic-components-europe-b-v-/