The "F" denotes an internal transient suppression Diode (also commonly referenced as a Flyback or Clamping Diode) instead of a resistor. On diode-suppressed relays, Pin 86 is traditionally wired to the +12V positive trigger. Pin 85 must go to the ground circuit.
CORE PARAMETERS:
• Coil Voltage: 12V DC (Nominal)
• Contact Form: 1 Form C / SPDT (Single Pole Double Throw)
• Pin Count: 5-Pin Quick Connect / Plugin Layout
• Current Rating: 30A (Standard for MC2 series)
• Target Systems: Air Conditioning, Headlights, Radiator Fans
PIN LOGIC (1 Form C Layout):
• Pin 30: Common (Power Input)
• Pin 85: Coil (Ground/Control)
• Pin 86: Coil (Trigger/Control)
• Pin 87: Normally Open (NO) - Main accessory power
• Pin 87a: Normally Closed (NC) - Alternating accessory power