G9KA PCB Power Relays

High Power and Temperature
Type Power Relay with
800 VAC 260 A / 1,000 VAC 300 A
Breaking and Ultra-Low Contact
Resistance

Ambient temperature 85°C
High impulse withstand voltage, 10 kV
Contact gap ≥4.0 mm (Conformed to VDE0126)
Low initial contact resistance ≤0.2 mΩ
Rises in board temperatures are suppressed
by a low heat generation and high dissipation structure.
Auxiliary contact option (High-capacity model) conformed to mirror
contact structure defined in IEC/EN60947-4-1 Annex F7.2
High Contact Reliability (Min. 5 VDC, 1 mA, reference value) by
Bifurcated contacts

＊Please check ”Precautions” before using G9KA.

【More Details】What is the Technology to Realize “Ultra Contact Resistance”

【Video】
Whole Explanation of G9KA

【Engineer Interview】“Extreme Low Heat Generation” Challenge to 0.2mΩ

【Quality Manager Interview】 Maintain “No Quality Defects are a Matter of Course“

When using the G9KA series, please observe the following precautions and use it safely.

Do not use a relay that has fallen, the relay may not work properly.
Do not use clips or sockets to connect to the relay alone, and do not mount it outside the recommended soldering conditions. Insufficient connection may cause abnormal heat generation.
Use a protection circuit together so that the current stops when the relay fails. When the relay fails, there is a risk of abnormal heat generation.
When using relays with no load switching (so-called dry switching), please be sure to contact our sales representative for support.
Dry switching does not provide the arc-cleaning effect on the contacts, which may cause contact resistance to increase.
We do not recommend dry switching unless measures are taken to counteract this increase in contact resistance.

In addition to the above, please be sure to check the precautions on the data sheet G9KA when using.

DOWNLOAD

This web page provides an excerpt from a datasheet. Refer to Product Datasheet and other applicable documents for more information. Models for which CAD data is available can be checked from the "Model list".

Catalog

Data type	File name	Date of update
Data sheet	Data sheet G9KA	2025/11/13
Precautions	Safety Precautions for All PCB Relays	2025/10/30
Selection Guide	Electrical Mechanical Relay Selection Guide	2025/04/01
Technical information	Troubleshooting case studies [Mechanical PCB Relay Edition] Membership Only	2025/03/12

Whitepaper

Data type	File name	Date of update
White Paper	The G9KA series 800 VAC 260 A / 1000 VAC 300 A PCB Relay with ultra-low contact resistance feature	2025/10/01

MODEL LIST

Relevant information for each model is listed. CAD data can be downloaded after logging in or registering as a member.

Model	Ultra Librarian 3D/ECAD^*2	OMRON 2D/3D CAD^*3	RoHS Certification^*4	Product Status
G9KA-1A	Login/Register	Login/Register	Download	In production
G9KA-1A-E	Login/Register	Login/Register	Download	In production
G9KA-1A1B-E	Login/Register	Login/Register	Download	In production

^*1External site (SamacSys) opens in a new window.
SamacSys uniquely created 3D CAD and ECAD data based on the information provided by OMRON. Please note that OMRON does not guarantee the accuracy, concurrence or completeness of 3D CAD and ECAD data.
^*2External site (Ultra Librarian) opens in a new window.
Ultra Librarian uniquely created 3D CAD and ECAD data based on the information provided by OMRON. Please note that OMRON does not guarantee the accuracy, concurrence or completeness of 3D CAD and ECAD data.
^*3See here for 2D,3D CAD data specifications.
^*4Rohs Certificate may not be listed.
Please contact us or distributors for products that are not listed.