Aharon 12V 30A Time Delay Relay (10-Second Delay-On) – 5-Pin SPDT Automotive Relay for HID, LED Light Bars, Fuel Pumps, and Accessories

The Aharon Time Delay Relay is a specialized 12V 30A solution designed to solve "hard start" issues, voltage surges, and signal chatter. By introducing a consistent 10-second delay upon receiving power, it ensures your power source stabilizes and the engine finishes cranking before downstream accessories engage.Key Technical Insights:"Delay-On" Logic: The 12V trigger signal (Pin 86) must remain constant for the full 10 seconds before power switches to Pin 87. If power is removed, the timer resets immediately.Size & Fit: This relay is taller than standard automotive relays. Please check your fuse box clearance before installation.Polarity Sensitive: Due to the internal electronic timer, Pin 85 MUST go to Ground and Pin 86 to the 12V Trigger. Swapping them will prevent operation.Wiring Configuration:Pin 30: Constant 12V (Battery)Pin 85: Ground (Negative)Pin 86: 12V Switched TriggerPin 87: Delayed 12V Output (Normally Open)Pin 87a: Immediate 12V Output (Cuts off after 10s delay)Common Applications:Automotive: Protects HID/Xenon systems from startup surges and prevents LED light bars from flickering during engine cranking.Heavy Machinery: Delays high-capacity radiator fans on forklifts during ignition, reducing initial starter motor load.Fluid Management: Eliminates solenoid "chatter" and rapid cycling on Reverse Osmosis (RO) water filters caused by water ripples across float switches.Diesel & Marine: Delays fuel pumps or compressors so glow plugs can warm up without battery drain, and silences marine oil pressure alarms during startup.

• Automatic 10-Second Delay-On: Prevents high-draw accessories from engaging until the engine has finished cranking. Ideal for protecting sensitive electronics from voltage surges, battery strain, and power fluctuations during startup.
• True SPDT Functionality: Features both Normally Open (87) and Normally Closed (87a) pins. Use it to delay a circuit from turning on or to have a circuit turn off automatically after 10 seconds.
• Heavy-Duty 30A Rating: Rated for up to 30A switching. Note: For high-continuous loads (over 15-20A) or sensitive applications, it is recommended to use this as a trigger for a secondary high-amp power relay.
• Broad Compatibility: A "drop-in" replacement for standard 5-pin automotive relays. Versatile enough for vehicles, heavy machinery, marine equipment, and specialized fluid or electrical systems.
• Polarity Sensitive: Unlike standard mechanical relays, this unit contains an internal solid-state timer. Pin 85 must be connected to Ground and Pin 86 to the 12V Trigger for the timer to function.