1. 7203SH3ZQE Substitution Conclusion The 7203SH3ZQE can serve as a direct drop-in replacement for the original part number 100DP3T1B1M1CE in terms of electrical performance, mounting compatibility, and core functionality. Both switches share identical specifications: DPDT construction, On-Off-On switching function, electrical ratings (5A/120V AC, 28V DC), panel cutout (6.35mm), thread size (1/4-40), terminal type (solder lug), and sealing characteristics (epoxy-sealed). The only notable variation lies in the actuator length—10.16mm for the C&K part versus 10.41mm for the E-Switch part. This 0.25mm difference may result in a slight variation in the actuator protrusion height after panel mounting, but it does not affect electrical safety or mechanical operation. Provided that the application does not impose strict requirements on visual flushness, the two parts can be considered functionally interchangeable substitutes.