1. 100DP3T1B1M1QEH Substitution Conclusion From the perspective of core electrical specifications, mounting dimensions, and basic performance, the 100DP3T1B1M1QEH can serve as a substitute for the original part number. The primary deviation lies in the actuator (toggle lever): the original part features a flat, anti-rotation head with a length of 11.43 mm, whereas this substitute part employs a standard round head with a length of 10.41 mm. Consequently, substitution will alter the tactile feel and visual profile of the switch panel from a "flat, anti-rotation" style to a "traditional round" style. Additionally, the lever's protrusion above the panel surface will be reduced by approximately 1 mm. This dimensional difference must be evaluated in applications requiring precise actuation feel or specific height alignment with other panel components. If the focus is solely on electrical connectivity and basic switching functionality, this variance is generally acceptable. However, the specific meaning of the "B1" code—which may relate to actuator color or finish details—should be confirmed with the manufacturer.