J3‑53 Circuit Assembly TCD12A Bus Air‑Conditioner Complete Electrical Circuit Assembly

J3‑53 TCD12A Circuit Assembly is complete pre‑assembled electrical control unit for new‑energy bus air‑conditioning system. Integrated inverter module, DC contactors, relays and complete wiring harness mounted on metal base plate. Factory pre‑wired assembly reduces field wiring work and installation error risks. Metal base plate provides good heat dissipation and vibration resistance, adapts to complex onboard operating conditions. Complete assembly for direct replacement, widely used for city bus and tourist coach air‑conditioning system overhaul and maintenance.