Specifications Subject To Change Without Notice www.ottoexcellence.com 108
The P1 offers a mechanical life that is well beyond the 50,000
cycles required by MIL-PRF-8805. The double break switching
mechanism has an incredibly fast transfer time, reducing arcing
and increasing contact life. The inherent wiping action breaks
welds and scrubs the contacts clean on every actuation.
The P1 switch offers vastly improved life under extreme
conditions found in most military environments. Moistureproofing
is accomplished in two ways. The pushbutton is sealed with
a silicone boot operating on our patented “rolling sleeve,”
providing longer life and smoother operation over a wide
temperature range. Epoxy seals protect the contacts and
terminals from hostile environments and solder flux.
Watertight sealing to Commercial (IP68S) and Military (MIL-
PRF-8805 Design 3) standards are available. This watertight
design is also available in commercial construction as the
P3 series (add “W” to your part number).
High contact force (120g/4.2 oz), low contact resistance
(25mΩ max) and short contact bounce result from our snap-
action mechanism. These characteristics guarantee exceptional
current carrying capabilities over the life of the switch. With the
optional low level (gold plate) configuration, the P1 is well suited
to interface directly to computers and other solid state devices.
The P1 switch is a quality precision snap-action switch
designed for use in panel boards, control grips, computers,
instruments, pressure switches and other hand or machine
operated applications where sealed pushbutton switches are
required. Its precision permits the P1 to be used as a limit switch
with unique size, high electrical ratings and a wide choice of
mounting styles.
Features:
• Buttonsealedwithpatented“rollingsleeve”principle
• Contactareasealedatbutton&terminals
• Lessthan25mΩcontactresistance
• Idealforlowlevelswitchingaswellasupto
10ampduty
• Positivetactilefeedback
• Varietyofmountingstyles
• Engravedbuttons&bezelsavailable
• ULrecognized&CSAcertified
• WatertighttoIP68Savailable
• RoHS/WEEE/Reachcompliant
Style P1-1
Style P1-3
Style P1-6
Style P1-7
Style
P1-5
Style P1-2
StandardCharacteristics/Ratings:
ELECTRICALRATINGS:
Load SeaLevel@28VDC 50,000feet@28VDC
or115VAC,60/400Hz or115VAC,60/400Hz
Resistive 10A N/A
Inductive 5A 5A
Lamp 3A N/A
Motor 3A N/A
Center Contact 3A max N/A
DWV 1050Vrms 400Vrms
Low Level 10mA @ 30mV max DC or peak AC
ElectricalLife: 25,000 cycles
MechanicalLife: 50,000 cycles, circuit forms 3, 4, & 5
250,000 cycles, circuit forms 1, 2 & 6
Seal: MIL-PRF-8805 Design 2 or
Watertight per IP68S or MIL-PRF-8805 Design 3
OperatingTempRange: -55°C to +85°C
OperatingForce: 2.5 lbs. or 4.0 lbs.
ResetForce: 0.75 lb. or 1.0 lb.
TotalTravel: 0.085 +/- 0.015 inches
Overtravel: 0.012 inches min
MovementDifferential: 0.015 inches min
MATERIALS:
Case: Black anodized aluminum alloy
Button: Thermoplastic
Terminals: Brass with silver plate, gold plate for low level
TerminalHardware: Screws, lockwasher and solder lugs for screw terminal option
MountingHardware: Hex nut and lockwasher, panel seal on watertight switches
Style P1-8
PUSHBUTTONS PER MIL-PRF-8805/3 (MS25089) MILITARY
PUSHBUTTONS
P1
MOMENTARY ACTION, SEALED, SNAP-ACTION, DOUBLE BREAK
PUSHBUTTONS