PBS-33B 1A 250VAC / 3A 125VAC 12mm Mini Round Momentary Push Button Switch

The PBS-33B is a compact 12mm mini round momentary push button switch designed for control panels, instruments, and compact electronic assemblies. Rated for 1A at 250VAC and 3A at 125VAC, it provides a balance of low-voltage precision control and higher-current capability for AC circuits within those limits. The momentary (spring-return) action ensures the switch completes its circuit only while depressed, making it suitable for momentary user inputs such as reset, test, or momentary control commands.Its small 12mm diameter housing allows installation in tight panel spaces and densely populated front panels where larger actuators would be impractical. The round actuator form offers a familiar ergonomic interface for operators and can be incorporated into layouts that require uniform button geometry across multiple controls. The PBS-33B's electrical ratings are printed in the model name and should be observed to ensure safe operation within specified limits.When selecting this switch, designers should confirm compatibility with panel cutout dimensions, mounting depth, and connector/terminal style of their application, and verify that the switching current and voltage ratings match the intended circuit. The momentary characteristic and rated AC currents make this type of switch well suited to control and signaling functions where a temporary contact is required.