1. 7203P3YZGE Substitution Conclusion Based on comparative analysis, the C&K 7203P3YZGE can serve as a direct substitute for the E-Switch 100DP3T6B11M1QE. Both switches are fully compatible in terms of core electrical specifications (DPDT On-Off-On circuit, 5A/120V AC & 28V DC rating, epoxy-sealed terminals), mechanical mounting dimensions (6.35mm panel cutout, 1/4-40 threaded bushing), and key performance (40,000-cycle electrical life). The sole technical deviation lies in the actuator length: the original part measures 12.29mm, while the substitute is 11.43mm, a difference of approximately 0.86mm. This results in a slightly lower profile of the switch lever above the panel surface for the substitute. While this variation typically does not affect electrical functionality or panel mounting, it may introduce a subtle visual difference in the final product’s appearance. In extremely compact designs or applications with strict actuator protrusion limits, this dimension should be verified. For the vast majority of use cases, however, the difference falls within acceptable tolerances and does not preclude direct substitution.