DL1BKB4 - 

Flashing Protected® LEDs, Red Color, 24 VAC/VDC Voltage Rating

PROTECTED LED® is an integrated light module offering special control and protection circuits, which negate the effects of electrostatic discharge, capacitive coupling and electromagnetic radiation. In addition, these protective circuits inhibit LED illumination due to proximity switch or PLC I/O module leakage currents. The protection device prevents spurious LED illumination by absorbing any interference, such as the energy resulting from coil de-energization.

BA 15d Base Lamp Is Actually a Vertical PCB Incorporating 8 to 12 LEDs

Overvoltage and Reverse Polarity Protection

Flashing LEDs for Use with XVP Lens Units Only