1. Substitution Conclusion for 100DP3T6B11M1QEH A detailed comparison confirms that the E-Switch 100DP3T6B11M1QEH is a technically viable substitute for the C&K 7203P3HZGE. The two parts are identical in their core electrical parameters (DPDT circuitry, On-Off-On function, 5A/120V current/voltage rating), key mechanical interfaces (1/4-40 mounting thread, 6.35mm panel cutout diameter, solder lug terminals, and epoxy seal), and base mechanical life (40,000 cycles). This ensures functional and mounting compatibility for the vast majority of applications. The primary identifiable difference lies in the actuator (lever) length. The E-Switch part measures 12.29mm, approximately 0.86mm longer than the 11.43mm lever of the C&K part. As a result, post-substitution, the switch lever will protrude slightly more from the panel. This may affect the final product's cosmetic uniformity or pose an interference risk in extremely tight spaces, but it typically does not impact electrical performance or basic operation. Therefore, this substitution is valid provided the assembly allows for the minor spatial difference and the slight cosmetic variation is acceptable. It is recommended to obtain samples for final verification of appearance and tactile feel before committing to a full production changeover.