Overview
The Miyama Electric MS-197 is a heavy-duty DPDT pushbutton switch designed for reliable switching in industrial and electronic equipment. With a rated capacity of 3A @ 125VAC and ON-ON operation mode, this vintage switch delivers consistent contact closure suitable for control circuits, signal switching, and equipment bypass applications. Built to exacting Japanese manufacturing standards, the MS-197 has been a proven workhorse in audio equipment, test instrumentation, and general industrial control systems.
Key Features
- Double Pole, Double Throw (DPDT) switching configuration
- ON-ON momentary operation for two-way switching
- Heavy-duty construction with reliable mechanical contacts
- Black pushbutton actuator with standard plunger design
- Compact form factor suitable for panel and chassis mounting
- Long operational life with consistent contact force
Technical Specifications
- Manufacturer: Miyama Electric (Japan)
- Part Number: MS-197
- Configuration: DPDT (Double Pole, Double Throw)
- Operation: ON-ON momentary pushbutton
- Contact Rating (AC): 3A @ 125VAC
- Contact Configuration: 6 total contacts (3 per pole)
- Actuator Color: Black
- Actuator Type: Plunger pushbutton
- Terminal Style: Solder lugs
- Condition: New, no original packaging
Typical Applications
The MS-197 is commonly found in:
- Audio equipment and guitar effects pedal true-bypass switching
- Test and measurement instrumentation
- Industrial process control circuits
- Equipment selector and mode switching
- Signal routing and logic control circuits
- Retro electronics restoration and repair
Compatibility & Replacements
As a vintage Japanese component, the MS-197 is not directly superseded by a single modern equivalent, but functionally similar DPDT pushbutton switches are available from contemporary manufacturers including APEM, Crouzet, and others. When sourcing replacements, ensure that voltage and current ratings (minimum 3A @ 125VAC), contact configuration, and physical mounting dimensions match the original application. The MS-197’s solder-lug terminals may require adaption for modern PCB designs using through-hole or surface-mount footprints. Original Miyama switches remain in demand by vintage audio equipment restorers and hobbyists seeking authentic component restoration.
