The Trane 57T02-001 Time Delay Relay (also known as RLY03081 or 5001 0989) is a factory original component designed for HVAC systems requiring a specific power-on and shut-down timing protocol. It features a 2-second ON delay and a 45-second OFF delay, ensuring smooth blower fan operation and reducing wear on other system components. This reliable OEM relay helps prevent short cycling and allows the system to properly dissipate residual heat. Key Features OEM Trane time delay relay for precise HVAC control Delays fan start by 2 seconds after signal Keeps fan running 45 seconds after system shutoff Enhances system efficiency and component longevity Plug-in installation for Trane compatible units Compact, durable build for residential or light commercial systems Specifications Part Numbers: 57T02-001, RLY03081, 5001 0989 Function: Time Delay Relay (2 Sec ON / 45 Sec OFF) Voltage: 24 VAC Mounting: Plug-in Control Type: SPST or circuit-compatible timing relay Use Case: Blower control in HVAC systems Compatible Models 4TCC3036A1000AA 4WCC3018A1000AA 4WCX3048A4000BA 4TCC3060A4000AA 4TCX3036A4000AA 4WCC3036A1000AA 4TCC3048A3000BA 4WCX3060A3000BA 4TCC3030A1000AB 4TCC3042B1000AA Why Choose This Item Trust the Trane 57T02-001 relay to maintain consistent airflow and prevent premature component failure. Its built-in timing logic is critical for proper furnace or A/C fan sequencing, contributing to optimal comfort, energy savings, and equipment protection. Ideal for direct replacements in a broad range of Trane units, it's a must-have for professionals maintaining high-efficiency HVAC systems.