1. Substitution Conclusion for 100DP3T6B11M1QE The 100DP3T6B11M1QE is generally compatible with the original part 7203P3YZQE in terms of electrical and mechanical specifications. It matches the DPDT circuit configuration, On-Off-On function, 5A/120V rating, solder lug termination, 6.35mm panel cutout, and 1/4-40 bushing. Therefore, it is a functionally viable drop-in replacement. Key deviations are noted. The actuator length is increased from the original 11.43mm to 12.29mm, a difference of approximately 0.86mm. This results in greater actuator protrusion after panel mounting, which may affect panel aesthetics, tactile feel, or compatibility with an enclosure. Applications with tight dimensional constraints should re-evaluate the mounting design. Furthermore, the manufacturer has changed from C&K to E-Switch. While the specifications are identical, this introduces potential differences in the supply chain or quality control processes. Long-term reliability should be validated in the actual application. In summary, this part is suitable as a direct substitute provided the slight increase in actuator length is acceptable within the application's design.