1. 2M1-DP3-T1-B1-M1GE Substitution Conclusion Based on a comparison of core electrical specifications, mechanical mounting interfaces, and ingress protection ratings, the Carling Technologies 2M1-DP3-T1-B1-M1GE can serve as a direct, fully functional replacement for the Grayhill 34BWDP31B1M1QT. The two parts demonstrate high alignment across all critical parameters: both utilize a DPDT On-Off-On circuit configuration, share identical current and voltage ratings of 5A/125V AC and 28V DC, and feature the same 6.35mm panel cutout and 1/4-40 threaded bushing mounting dimensions. Furthermore, both achieve equivalent protection and reliability through IP67-rated sealing and epoxy-encapsulated terminals. The only minor deviation is in actuator length (Carling: 10.39mm, Grayhill: 10.60mm), resulting in a negligible 0.21mm difference. This variance is imperceptible in practical panel installation and operation and does not impact functional performance or mechanical compatibility. Overall, the substitute part meets all requirements for direct replacement in terms of electrical performance, mechanical fit, and environmental durability.