US-Made Components, Powering Critical Infrastructure.
We source genuine electrical and power components through authorized US channels — for the builders behind AI data centers, semiconductor fabs, battery plants, and the expanding grid.
The right part, from an authorized source, on schedule.
Three decades bridging US manufacturing and the world's power builders.
The authorized source for US-made electrical components — genuine, documented, and traceable, from quote to delivery.
The lines behind the world's power.
Leading US manufacturer lines across protection, circuit protection, power quality, controls, and switchgear components — sourced only through authorized channels.
Manufacturer names and marks belong to their respective owners; official brand logos are placed at launch.
What each line brings
Capacitors, instrument transformers, terminal blocks, and test switches — GE grid components for transmission and distribution.
Relays, instrument transformers, and electrification components across LV and MV.
High-voltage products and grid automation for transmission networks.
Fuses, circuit protection, and surge arresters — Eaton, the Bussmann series, and Cooper Power.
Schweitzer Engineering Laboratories protective relays, automation, and engineering services.
Protective relays, controls, and distribution components for industrial power.
Energy management and distribution equipment across LV and MV.
Rotary switches, lock-out relays, and control switches for utility and industrial control.
STATES-series test switches and measurement products for relay and meter testing.
Heavy-duty industrial relays and controls, built on a century of US manufacturing.
Surge protective devices (SPD) for AC, DC, photovoltaic, and data-line applications.
Looking for another line?
We source beyond our core lines when a project calls for it. Send the part number — we'll find it.
Ask KOMASAThe infrastructure our components power.
For three decades we've supplied components into a broad range of power projects and applications. Recent job sites by segment:
AI & Data Centers
- AI supercomputer campusTennessee
- Cloud data centersUS
- Colocation campusKorea
- Data center campusVirginia
Semiconductors & Display
- Semiconductor fabTaylor, Texas
- Semiconductor fabIndiana
- Display fabKorea
- Semiconductor fabBastrop, Texas
Battery, EV & Storage
- Battery gigafactoryMichigan
- Grid-scale battery storageCalifornia
- Battery plantTennessee
- EV battery joint ventureGeorgia
Solar & Renewables
- Solar cell manufacturingUS
- Biomass power plantKorea
- Utility-scale solar PVNevada
- Hydroelectric stationPennsylvania
LNG, Oil & Gas
- LNG export projectTexas
- Gas field developmentSaudi Arabia
- Midstream pipelineNebraska
- RefineryKorea
Nuclear & Generation
- Nuclear new buildKorea
- Nuclear units 7 & 8Bulgaria
- Nuclear unit 3UAE
- Combined-cycle power plantKorea
Utilities & Grids
- National utilityQatar
- Island utilityGuam
- National utilityKorea
- Rail traction powerKorea
Industrial
- Polysilicon plantMalaysia
- Shipyard power systemsKorea
- Launch facilitiesTexas
- Airport power systemsNevada
From part number to delivered.
One RFQ starts a tracked path from our sourcing desk to your site — the same five steps, every time.
Submit RFQ
Send manufacturer, part number, quantity, and the date you need it.
We Source
We confirm availability and pricing through authorized US channels.
Formal Quote
You receive pricing with lead time and freight options.
Order & Production
On your PO, we place the order, confirm the O/A, and track factory dates.
Delivery
Documented, tracked delivery to your site — COCs and test reports included.
A part number is all it takes.
Tell us the manufacturer, part number, and quantity. We'll reply with pricing and lead time through authorized US channels.
RFQ received.
Thank you — our team will reply with a quote shortly, from either our California or Korea office.
← Back to topTwo offices, always within reach.
Reach us from either side of the Pacific — our US headquarters and Korea branch cover your working day, whichever time zone you're in.
San Francisco Bay Area
Songdo, Incheon
One team across both offices — sourcing, quoting, and order support in your working day.
sales@komasa.usFor everything else, there's one address.
Partnerships, supplier relations, general questions — send a note and the right person gets back to you.
For quotes, use the RFQ form — it's faster.