Product Overview
Matsushita OU40K1 40 kHz Ultrasonic Transducer Element NOS
Condition
Unused new old stock (NOS). Stamped base marking reads: OU40K1 with Matsushita emblem. Through-hole pin terminals are clean and straight with no solder residue. Stored in dry conditions; mesh screen and can casing are intact with no dents or corrosion.
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Product Overview
Matsushita OU40K1 is an open-structure 40 kHz piezoelectric ceramic ultrasonic transducer element in a cylindrical metal can with an integral wire mesh protective screen. Originally produced as part of Matsushita's EFR40K2 series for ultrasonic sensing, distance gauging, and proximity detection systems, this 2-pin radial component serves as a direct replacement in legacy electronic hardware, robotics platforms, and acoustic ranging assemblies.
Key Features
- 40 kHz resonant operating frequency for standard ultrasonic detection circuits
- 2-pin through-hole radial leads for PCB or point-to-point mounting
- Cylindrical aluminum housing with protective wire mesh front face
- Phenolic resin base header with stamped manufacturer identity
- Passive piezoelectric ceramic construction requiring external drive circuitry
Applications
- Solder directly into robotic navigation boards for obstacle clearance detection
- Replace aged or damaged transducers in legacy ultrasonic distance-measuring tools
- Benchtop acoustic sensing experiments, microcontroller pulse timing, and sonar breadboarding
Frequently Asked Questions
Does this transducer require external driver circuitry?
Yes. This is an unamplified passive piezoelectric transducer element. Operating it requires external signal generation at 40 kHz for transmission or matching analog front-end amplification for reception.
What is the pin configuration?
The unit features two straight through-hole wire pins extending from the rear resin base for standard circuit board through-hole soldering.
How does the stamped OU40K1 marking relate to the EFR40K2 catalog designation?
Matsushita cataloged the complete ultrasonic assembly under the EFR40K2 series line, while individual transducer cans within that line received the factory body stamp OU40K1.
A classic mesh-front 40 kHz acoustic transducer from an era before integrated digital rangefinders did all the thinking for you. Wire up a clean driver circuit and let the pings fly.
