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Flashers
Littelfuse Flashers meet D.O.T., S.A.E. and all applicable state
and federal requirements.
Pin Configuration Key
X = Battery
L = Lamp
P = Pilot Light
-
+
THERMAL FLASHERS
Variable For Import Cars/Domestic Trucks
• Replaces most 12 volt, three terminal
flashers.
• Capacity
– Turn Signals: Flashes two to three 32 C.P.
standard or long-life lamps.
– Hazard Warning: Flashes two to six lamps.
• Separate pilot circuit and durable, heavy
duty thermal flashing mechanism for
increased reliability.
• Quality construction ensures continued
operation even under harsh temperature
and humidity environmental factors.
VOLTS
TERMINALS
LAMPS
BOXED CARDED
MATERIAL
#
CATALOG
#
MATERIAL
#
CATALOG
#
NEW PACKAGING
MATERIAL #
12
2 2-6 0FLR536/552
FLR536/552
0FLR536/552P
FLR536/552BP
0FLR536/552PA
TYPE OF LOAD
Variable: Variable load flashers will handle
a range of lamps as needed up to the total
specified.
Exact: Exact load flashers will flash only
the number of lamps for which it is rated.
These are typically for OEM replacement
applications.
LAMP CAPACITY
The total number of lamps energized in the
circuit.
TERMINAL COUNT
Two or three terminals — always match
the terminal configuration being replaced.
DESIGN
Thermal: Thermal (Bi-Metal) flashers are
a mechanical device that operate through
the heating and cooling of a
bi-metal strip, opening and closing the
contacts, causing the lamps to “flash”.
Electronic: Electronic flashers are
comprised of an electro-mechanical relay
with an opposing A and B coil. A capacitor
prevents one coil from pulling in relay
contacts until it is fully charged. The
charging and discharging of the capacitor
along with a resistor determine the flash
rate and set duty cycle (on/off time).
In some cases you can replace a Thermal
Flasher with an Electronic Flasher but
never replace an Electronic Flasher with a
Thermal Flasher.
Universal Variable For Domestic Cars
• Universal design replaces most popular
part numbers 536 and 552.
• Replaces 12-volt, two terminal flashers.
• Capacity
– Turn Signals: Flashes two to three 32
C.P. standard or long-life lamps.
– Hazard Warning: Flashes two to six
lamps.
• Features durable, heavy duty thermal
flashing mechanism for increased
reliability.
• Quality construction ensures continued
operation even under harsh temperature
and humidity environmental factors.
VOLTS
TERMINALS
LAMPS
BOXED CARDED
MATERIAL
#
CATALOG
#
MATERIAL
#
CATALOG
#
NEW PACKAGING
MATERIAL #
12
3 2-6 0FLR0550X
FLR550
0FLR0550XP
FLR550BP
0FLR0550XPA
