Federal Signal's Pulsator® 551 Plus features a state-of-the-art power supply for improved light output and warning effectiveness. This high-profile strobe combines advanced dome optics with a high-performance power supply to produce a brilliant flash that meets SAE Class 2 requirements.

Pulsator 551 Plus strobes are exceptionally durable. The power supply is moisture and vibration resistant and protected against reverse polarity, voltage spikes and RFI. The patented base design and O-ring gasket combine to seal out moisture and contaminants. All models feature modular construction that provides quick access to internal components. The impact-resistant, polycarbonate, dome and base provide added durability in heavy-duty applications.

Heavy Duty models feature a gel-filled base that completely encases the power supply for extra protection against vibration and moisture. The encased power supply allows superior performance in extreme high-vibration environments.

Pulsator 551 Plus models are available in 10-joule (double & quad-flash) and 8-joule (double-flash), 12-48 VDC versions and 115 Volt (5-joule/single & double-flash) AC versions. All models use a helical strobe tube that is easily replaceable. All models include the necessary mounting hardware.


Approvals 8 and 10-joule - SAE J1318 Class 2
Flash Rate Double Flash - 80 FPM
Quad Flash - 75 FPM
AC Model - 70 FPM
Voltage 12-48 VDC
115 VAC
Joules Double Flash - 8J
Quad Flash - 10J
AC Model - 5J
Power 8-joule Double Flash - 10.7 watts
10-joule Double Flash - 13.3 watts
Quad Flash - 12.5 watts
AC Model - 5.8 watts
Current Draw 8-joule Double and Quad Flash - 0.9 Amps @ 12V to 0.25 Amps @ 48V
10-joule Double and Quad Flash - 1.2 Amps @ 12V to 0.3 Amps @ 48V
AC Model - 0.1 Amps
Dim. (D x H) 6.5 in x 6.0 in (165 mm x 152 mm)
Ship Weight 1.5 lbs (0.7 kg)