1. 100DP3T1B1M1QEH Substitution Conclusion From the perspective of key electrical parameters and mechanical compatibility, the 100DP3T1B1M1QEH can serve as a substitute for the original part number. However, potential design redundancy due to differences in electrical specifications should be noted. Compared to the original, this variant features significantly higher current/voltage ratings (5A 120V AC vs. 0.4VA 20V). For low-power signal switching applications, performance is fully adequate with substantial margin. However, if used in the original low-voltage, low-current circuit design, its higher specifications may lead to increased cost. Additionally, the actuator type has changed from "flat anti-rotation" to "standard round," which may affect the panel tactile feel and anti-snag characteristics. It is necessary to verify whether the operational experience after panel mounting meets expectations. Other mechanical dimensions (mounting hole diameter, thread) and lifetime parameters are identical, ensuring direct installation compatibility.