The APEM Inc. part 12157X778 is a high-performance toggle switch designed for reliable and efficient operation. It features a 3PDT (Triple Pole Double Throw) configuration, allowing for versatile switching options. The switch has a "Mom-Off-Mom" function, meaning it maintains its position when released, making it ideal for applications requiring momentary on-off-on functionality.With a maximum current rating of 4A at 125 VAC and 28 VDC, this toggle switch is capable of handling high-power loads while maintaining exceptional performance. The switch also features standard actuator design, ensuring compatibility with various applications and user-friendly operation.Designed for easy installation, the switch comes with solder lug terminals, allowing for a secure and reliable connection. Whether used in industrial machinery, electronic devices, or other applications, the APEM Inc. 12157X778 toggle switch provides exceptional reliability and performance for all your switching needs.