Circuit Design
Circuit Design, Inc. is a privately held Japanese manufacturer of industrial-grade low-power radio modules — including narrowband UHF transceivers, LoRa modems, telecommand units, and audio modules — sold globally through a network of ~25 authorized distributors to OEMs in infrastructure monitoring, industrial telemetry, and remote-control applications.
- Company typePrivate
- Founded1974
- HeadquartersNagano, Japan
- Headcount51–100
- GTM typeB2B
- OfferingHardware or Manufacturing
What Circuit Design does
Circuit Design, Inc. is a privately held Japanese manufacturer of industrial-grade low-power radio modules, founded in 1974 and headquartered in Nagano, Japan, with a wholly-owned German subsidiary (Circuit Design GmbH) serving Europe. The company designs and produces a portfolio of narrowband UHF data transceivers (STD, LMD series), transmitters and receivers (CDP series), radio modems with proprietary command protocols (MU-4 series) and LoRa-enabled long-range modems (SLR-434M, SLR-429M), telecommand modules (CDT, NK-2.4Y, KST/KSR 2.4 GHz), audio modules (WA series), and supporting accessories including antennas, cables, and power amplifiers (PA-TR3). Core technologies span narrowband FM/MSK modulation, frequency hopping spread spectrum, true and antenna diversity receiver architectures, and Semtech LoRa wireless RFIC integration, with products certified across Japan (ARIB), EU (CE/RED), UK (UKCA), USA (FCC), Canada (ISED), China (CCC), and Korea (KCC).
The company sells exclusively through a global authorized distributor network covering ~25 channel partners across 20+ European countries plus Japan, India, Vietnam, Australia, the United States, and Israel. It does not publish pricing and does not sell direct to end customers. Target use cases span industrial infrastructure monitoring (sewage systems, dams, rivers, tunnels, bridges), telemetry and telecontrol (machine condition monitoring, security alarms, agricultural remote control), industrial telecommand (ON/OFF switching, emergency warning systems), and audio transmission (museum guides, tour systems, wireless microphones). Named end customers are limited in public disclosure, with Hokuyo Construction Co. Ltd. cited for a solar-powered mudflow/landslide warning deployment in Japan.
Revenue is undisclosed, ownership appears to be founder/management controlled with no external funding rounds identified, and the headcount sits in the 51–100 range. The company is led by Chairman Kazuo Maruyama and President Yukinaga Koike, and continues to release new products such as the February 2026 STD-504 true-diversity 2.4 GHz transceiver.
Circuit Design firmographics
Firmographics- Name
- Circuit Design
- Legal name
- Circuit Design, Inc.
- Website
- https://cdt21.com
- Company type
- Private
- Founded year
- 1974
- Operating status
- Operating
- Headcount range
- 51–100 employees
- Short description
- Circuit Design, Inc. is a privately held Japanese manufacturer of industrial-grade low-power radio modules — including narrowband UHF transceivers, LoRa modems, telecommand units, and audio modules — sold globally through a network of ~25 authorized distributors to OEMs in infrastructure monitoring, industrial telemetry, and remote-control applications.
- Ownership category
- akta.pro rank
Circuit Design industry classification
Industry- Product category
- Industrial RF Modules
- NAICS
- Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing (334220), Other Communications Equipment Manufacturing (334290), Communications Equipment Manufacturing (3342)
- SIC
- Radio & Tv Broadcasting & Communications Equipment (3663), Communications Equipment, Nec (3669)
- akta.pro primary industry
- RF & Wireless Components/Modules (RF front-end, antennas, industrial wireless modules) (IMAGAJAG)
- akta.pro secondary industries
- RF Front-End Modules (FEMs) & Integrated RF Modules (HDAHAMAA), RF Transceivers & RFIC SoCs (Cellular/Wi‑Fi/Bluetooth) (HDAHAMAE)
Keywords
Where Circuit Design is headquartered
LocationHeadquarters
- HQ city
- Nagano
- HQ country
- Japan
- HQ region
- Asia
Offices2 records
Markets served
Circuit Design business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Technology or R&D, Personnel, Operations, Infrastructure
Revenue model
- Radio Module Sales: Circuit Design generates revenue through the sale of proprietary radio modules and transceivers for industrial applications. Products include data transmitters/receivers, transceivers, radio modems, telecommand modules, and audio modules along with accessories such as antennas and cables.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels6 records
Circuit Design product offering
Product offeringCore offering
Circuit Design designs and manufactures industrial-grade low-power radio modules — including narrowband data transceivers, transmitters and receivers, radio modems, and telecommand modules — for OEM integration into telemetry, telecontrol, infrastructure monitoring, and wireless audio applications. The company also produces supporting RF accessories such as power amplifiers, antennas, and coaxial cables, and sells exclusively through a global network of authorized distributors across more than 20 countries.
Product overview
Circuit Design is a manufacturer of industrial-grade RF (radio frequency) modules for data transmission, telecommand, and audio applications. Their product portfolio centers on narrowband radio transceivers, transmitters, receivers, and radio modems operating across various frequency bands including 400 MHz, 800 MHz, 900 MHz, 1.2 GHz, and 2.4 GHz. The core products include the STD series transceivers (LMD-401, STD-302Z, STD-502-R, STD-503, STD-504, STD-601, STD-602-429) offering serial data communication with transparent interfaces; CDP series transmitters and receivers (CDP-TX/RX-02E, 02F, 07M, 07MP) for simpler point-to-point data links; MU-4 and SLR-434M radio modems with command protocols and LoRa technology respectively; CDT and NK/KST series telecommand modules for ON/OFF signal transmission and remote control; WA-TX/RX-03S audio modules for wireless audio; plus supporting accessories including antennas, coaxial cables, and power amplifiers. Products are certified for global markets including Japan (ARIB), EU (RED/EN300 220), UK, US (FCC), Canada (ISED), China (CCC), and Korea (KCC).
Differentiator
Problem solved
Functional benefit
Products and services
- LMD-401 Narrowband UHF transceiver module operating at 458-462.5 MHz with PLL interface, programmable channels, and data rates up to 4,800 bps for industrial serial data transmission applications.
- STD-302Z UHF narrow band radio transceiver for industrial applications supporting multiple frequency bands (419/429/434/447/458/869/1216/1252 MHz) with Category 1 receiver performance.
- STD-502-R 2.4 GHz transceiver with dual antenna diversity reception, supporting data rates up to 19,200 bps and 77 channels for industrial applications.
- STD-503 2.4 GHz transceiver with diversity receiver and channel step option, supporting 19,200 bps data rate and 77 channels for industrial applications.
- STD-504 2.4 GHz transceiver with true diversity receiver and transmitter diversity, supporting 19,200 bps and 75 channels for congested industrial environments.
- STD-601 Multi-band transceiver available in 400 MHz (429/434/447/458 MHz) and 434 MHz versions, supporting data rates from 1,200 to 19,200 bps with up to 137 channels.
- STD-602-429 Pre-certified narrowband transceiver for the Japan 429 MHz band with a compact design for telemetry and remote control industrial applications.
- CDP-TX-02E / CDP-RX-02E 434 MHz transmitter and receiver pair with DIP switch frequency setting, 32 channels, and 4,800 bps data rate for serial data transmission in industrial applications.
- CDP-TX-02F / CDP-RX-02F 434 MHz transmitter and receiver with 128 channels and 4,800 bps data rate, featuring a compact design for industrial serial data communication.
- CDP-TX-07M / CDP-RX-07M Multi-channel transmitter and receiver (4 channels) available in 434 MHz and 869 MHz versions with solder jumper frequency setting and 4,800 bps data rate.
- CDP-TX-07MP / CDP-RX-07MP Re-programmable version of the CDP-TX-07M with 2-pin external frequency setting connectors, available in 434 MHz and 869 MHz versions.
- MU-4 Low power radio transceiver modem with command protocol for easy control, supporting relay and ACK functions, 127 channels, and data rates up to 4,800 bps in 429/434 MHz bands.
- SLR-434M LoRa-enabled low power RF modem with Semtech LoRa wireless RFIC, supporting switchable FSK and LoRa modes for extremely long range communication at 10 mW in the 434 MHz ISM band.
- CDT-TX-02M / CDT-RX-03M Multi-channel telecommand transmitter and receiver for ON/OFF signal transmission with 6 switching inputs/outputs, MSK modulation, and 500-1,000 m line-of-sight range.
- NK-2.4Y 2.4 GHz telecommand module with frequency hopping, CRC-16 error detection, Hamming distance 6, supporting 20 hopping channels and 1:1 communication for remote control applications.
- KST2.4S / KSR2.4 2.4 GHz telecommand unit with 6 inputs (KST2.4S) and 6 relay outputs (KSR2.4), frequency hopping, CRC-16 error detection, and 100 m line-of-sight communication range.
- WA-TX-03S / WA-RX-03S Wireless audio transmitter and receiver for the European 863-865 MHz band, 15 channels, compander noise reduction, and 50 Hz to 13 kHz audio response for clear analog audio transmission (discontinued model).
- PA-TR3-400M / PA-TR3-800M UHF power amplifier modules for 400 MHz and 800 MHz bands, providing up to 26 dBm output power with adjustable gain up to 17 dB, designed to boost Circuit Design RF module output power.
Companies that use Circuit Design
Customer profileNamed customers1 record
Segments4 records
Ideal customer profiles1 record
Circuit Design technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature6 records
Circuit Design partnerships and signals
Strategic signalPartnerships
Ten partnerships are on record, tiered core.
- Semtech CorporationcoreCircuit Design incorporates Semtech's LoRa wireless RFIC in the SLR-434M and SLR-429M modem products, enabling long-range LoRa modulation capability in addition to conventional FSK mode. This is a key component supply relationship for the company's LoRa-enabled product line.
- Reimesch Kommunikationssysteme GmbHcoreAuthorized distributor for Germany and Austria, providing local sales and technical support for Circuit Design products in the German-speaking European market.
- MICRORISC s.r.o.coreAuthorized distributor for Czech Republic, Poland, and Slovak Republic, providing local sales and support for Circuit Design products in Central and Eastern European markets.
- IDVISION bvbacoreAuthorized distributor for Belgium, Luxembourg, and Netherlands, providing local sales and support for Circuit Design products in the Benelux region.
- Acal BFi Nordic ABcoreAuthorized distributor for Denmark, Finland, Norway, and Sweden, providing local sales and support for Circuit Design products in the Nordic region.
- Saelig Company, Inc.coreAuthorized distributor for USA, providing local sales and technical support for Circuit Design products in the North American market.
- Adiv Techno Services Inc.coreAuthorized distributor for India, providing local sales and support for Circuit Design products in the Indian market.
- THANG LONG TECH CO., LTD.coreAuthorized distributor for Vietnam, providing local sales and support for Circuit Design products in the Vietnamese market.
- Telelink CommunicationscoreAuthorized distributor for Australia, providing local sales and support for Circuit Design products in the Australian and Oceania markets.
- Low Power Radio Solutions Ltd.coreAuthorized distributor for United Kingdom, providing local sales and support for Circuit Design products in the UK market.
Scale indicators2 records
Recent moves6 records
Expansion highlights5 records
Circuit Design competitors and assessment
Company assessmentBroad incumbents
- Advantech: Taiwanese industrial IoT and embedded computing company offering wireless communication modules and gateways for industrial applications. Adjacent competitor serving the same industrial OEM customer base with broader system-level offerings.
- Texas Instruments: Global semiconductor leader with the SimpleLink sub-GHz and 2.4 GHz RF transceiver families, widely used in industrial wireless applications. Competes at the silicon and module level with Circuit Design's industrial OEM customers.
- Murata Manufacturing: Large Japanese electronics company offering a broad range of wireless modules (LoRa, Wi-Fi, Bluetooth) for industrial IoT. Overlaps with Circuit Design in sub-GHz and ISM band RF modules but operates at much greater scale with a much wider product portfolio.
- Silicon Laboratories (Silicon Labs): Major US semiconductor company offering RF transceivers, wireless SoCs, and certified modules for industrial IoT. Competes broadly in the sub-GHz and 2.4 GHz industrial wireless module space with greater R&D scale.
Direct peers
- Radiometrix Ltd: UK-based specialist in low-power radio modules for industrial telemetry, telecommand, and data transmission. Highly comparable in product positioning, frequency band coverage, and target OEM customer profile.
- InnoComm Mobile Technology: Taiwanese provider of wireless connectivity modules for IoT and industrial applications, including Bluetooth, Wi-Fi, and proprietary RF solutions. Comparable in serving embedded OEM customers with wireless module products.
- Ezurio (formerly Laird Connectivity): Global manufacturer of industrial-grade wireless modules and antennas (formerly Laird), with strong presence in Bluetooth, Wi-Fi, and proprietary RF modules for industrial OEMs. Direct competitor in the certified industrial wireless module market.
- Radiocrafts AS: Norwegian manufacturer of low-power RF modules and transceivers for industrial IoT applications, with similar narrowband and proprietary protocol offerings. Directly competes in the same industrial embedded wireless module category as Circuit Design.
- Hope Microelectronics (HopeRF): Chinese manufacturer of low-cost RF transceiver modules (HM-TRP, HM-RP) operating in sub-GHz ISM bands for industrial applications. Competes on price-performance in the same industrial embedded wireless category.
- Adeunis: French IoT/M2M wireless module manufacturer focused on industrial telemetry, smart metering, and infrastructure monitoring. Directly competes with Circuit Design in industrial wireless data transmission use cases.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
Circuit Design social profiles
Digital presenceCircuit Design compliance and trust
Trust signalCompliance6 records
Circuit Design financial estimates
Financial estimateRevenue estimate
Valuation estimate
Circuit Design leadership team
Management profileNumber of profiles
Profiles2 records
Circuit Design subsidiaries and ownership
Company hierarchySubsidiaries1 record
Circuit Design funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Circuit Design M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Circuit Design
What does Circuit Design do?
Circuit Design designs and manufactures industrial-grade low-power radio modules — including narrowband data transceivers, transmitters and receivers, radio modems, and telecommand modules — for OEM integration into telemetry, telecontrol, infrastructure monitoring, and wireless audio applications. The company also produces supporting RF accessories such as power amplifiers, antennas, and coaxial cables, and sells exclusively through a global network of authorized distributors across more than 20 countries.
Is Circuit Design a public or private company?
Circuit Design is a private company. It is classified as founder individual operated bootstrapped and is currently operating.
When was Circuit Design founded?
Circuit Design was founded in 1974. It employs 51 to 100 people.
Where is Circuit Design based?
Circuit Design is headquartered in Nagano, Japan, in the Asia region.
How does Circuit Design make money?
One revenue line is on record: radio Module Sales.
Who are Circuit Design's main competitors?
Broad incumbents on record are Advantech, Texas Instruments, Murata Manufacturing and Silicon Laboratories (Silicon Labs). Direct peers are Radiometrix Ltd, InnoComm Mobile Technology, Ezurio (formerly Laird Connectivity), Radiocrafts AS, Hope Microelectronics (HopeRF) and Adeunis.
Does Circuit Design have an API?
No public API is recorded for Circuit Design.
What industry is Circuit Design in?
Circuit Design's product category is Industrial RF Modules. Its primary akta.pro industry code is IMAGAJAG, RF & Wireless Components/Modules (RF front-end, antennas, industrial wireless modules), with a secondary code of HDAHAMAA, RF Front-End Modules (FEMs) & Integrated RF Modules. Its NAICS code is 334220 and its SIC code is 3663.