ILLUMINATED & SEALED PUSHBUTTONS
ILLUMINATED
PUSHBUTTONS
LP3
56 OTTO Full Line Catalog Specifications Subject To Change Without Notice
MOMENTARY ACTION COMMERCIAL GRADE LED ILLUMINATED & SEALED
The LP3 offers rugged, sealed construction with the added
benefit of reliable LED illumination.
The LP3 is a precision snap-action switch designed for use in off-
highway, material handling, industrial controls, marine, medical
and demanding commercial applications. Choose from the
standard mounting styles and electrical ratings, or contact us for
custom configurations.
On sealed models, a silicone boot operating on our patented
“rolling sleeve” principle protects the contact area against
contamination at the button area. This boot provides long life and
smooth operation over a wide temperature range. Sealed
terminals protect the contact area from hostile environments and
solder flux on both sealed and unsealed models.
High contact pressure, amazingly low (25mΩmax, standard)
contact resistance and extremely low contact bounce are all
the result of the OTTO patented snap-action mechanism. Extra
long electrical life and precise trip point offer added value and
precision operation.
Features:
• Watertight to IP68S; moistureproof & dusttight to IP64
• LED lighted with the ability to accommodate 2, 6, 12 &
24VDC power & includes reverse voltage protection
• Tall & dome style buttons in translucent white,
red & amber permitting sublimated & pad
printed legends
• Less than 25mΩcontact resistance
• Quick disconnect terminals
• 15/32" & 5/8" thread, press fit & dome case
styles available
Raised Dome
Front Mount
Standard Characteristics/Ratings:
ELECTRICAL RATINGS:
Load Sea Level @ 28VDC or 115VAC, 60/400Hz
Resistive 5A
Inductive 3A
Lamp 1A
Motor 3A
DWV 1050Vrms
Low Level 10mA @ 30mV
Electrical Life: 25,000 cycles
LIGHTING:
Light Source Voltage (DC) Actual Voltage Nominal (DC) Voltage Max (DC)
222.6
678
12 13.5 14.5
24 28 28.6
Mechanical Life: 250,000 cycles @ +85°C
25,000 cycles @ -55°C
Seal: IP64 or IP68S
Operating Temp Range: -55°C to +85°C
Operating Force: 2.5 +/- 1.5 lbs. or 5.0 +/- 1.0 lb.
Total Travel: 0.080 inches max
Overtravel: 0.010 inches min
MATERIALS:
Case: Anodized aluminum alloy
Button: Thermoplastic
Terminals: Standard silver plate with optional gold plating
for low level applications
Mounting Hardware: Hex nut, lockwasher and panel gasket when applicable
Case Style Circuit Rating Light Source Type*
w/ Rev. Pol Protection
Seal Level Operating Force Case Color Button Color Legend Style
E. Exposed Dome
F. Flush Dome
R. Raised Dome
1. Press Fit Mount
3. 5/8” Thread
Front Mount
4. 15/32” Thread
Rear Mount
6. 5/8” Thread
Rear Mount
1. SPST N.O./Std.
2. SPST N.C./Std.
3. SPST 2 Circuit/Std.
4. SPST N.O./Low Level
5. SPST N.C./Low Level
6. SPST 2 Circuit/Low Level
A. 2V Red LED
B. 2V Green LED
C. 2V Amber LED
D. 6V Red LED
E. 6V Green LED
F. 6V Amber LED
G. 12V Red LED
H. 12V Green LED
J. 12V Amber LED
K. 24V Red LED
L. 24V Green LED
M.24V Amber LED
1. Unsealed
2. Dusttight
3. Watertight
2. 2.5 lbs.
5. 5.0 lbs.
1. Silver
2. Black
A. Amber, Translucent
(use Amber LED)
R. Red, Translucent
(use Red LED)
W.White, Translucent
Refer to Legend Table
for legend codes in
Appendix. Legends
will be printed in
white on amber and
red buttons and in
black on white buttons.
LP3 PART NUMBER CODE
LP3 – X X X X X X X – XX
* For super bright LEDs, contact factory.
S
ST
TO
OP
P
H
HE
ER
RE
Efor
illuminated switches
without legends.
®
Specifications Subject To Change Without Notice www.ottoexcellence.com 57
PUSHBUTTONS
NORMALLY OPEN
TERMINALS
NORMALLY CLOSED
TERMINALS
.380 REF.
.020 (TYP)
Ø .570 .110 (TYP)
2.150 MAX.
1.838 MAX.
.250 .25
1.408 REF. .312
REF.
LED ANODE (+)
LED CATHODE (-) Ø .500
Ø .375
Ø .624 ±.001
LP3-1
Momentary, Press Fit Mount
NOTE:
For indicator light only, see LP5 series.
NORMALLY OPEN
TERMINALS
NORMALLY CLOSED
TERMINALS
.380 REF.
Ø .570
LED ANODE (+)
LED CATHODE (-)
.020 (TYP)
Ø 1.046
Ø .730
.062
.44
.442
REF.
.110 (TYP)
1.677 MAX.
2.120 MAX.
.625-24 UNEF-2A THD. TO
WITHIN .062 OF FLANGE
1.247 REF.
LP3-E
Momentary, Exposed Dome Button
NORMALLY OPEN
TERMINALS
NORMALLY CLOSED
TERMINALS
LED ANODE (+) LED CATHODE (-)
Ø .570
.110 (TYP)
.020 (TYP)
1.197 REF.
2.120 MAX.
1.627 MAX. .492
REF
Ø .730
Ø 1.046
.380 REF.
.625-24 UNEF-2A THD. TO
WITHIN .062 OF FLANGE
NORMALLY OPEN
TERMINALS
NORMALLY CLOSED
TERMINALS
LED ANODE (+) LED CATHODE (-)
Ø .570
.110 (TYP)
.020 (TYP)
.44
2.120 MAX.
1.607 MAX.
1.177 REF.
.512
REF
Ø .730
Ø 1.046
.380 REF.
.625-24 UNEF-2A THD. TO
WITHIN .062 OF FLANGE
LP3-R
Momentary, Raised Dome Button
LP3-F
Momentary, Flush Dome Button
ILLUMINATED & SEALED PUSHBUTTONS ILLUMINATED
PUSHBUTTONS
LP3
MOMENTARY ACTION COMMERCIAL GRADE LED ILLUMINATED & SEALED
58 OTTO Full Line Catalog Specifications Subject To Change Without Notice
ILLUMINATED & SEALED PUSHBUTTONS
ILLUMINATED
PUSHBUTTONS
LP3
MOMENTARY ACTION COMMERCIAL GRADE LED ILLUMINATED & SEALED
NORMALLY OPEN
TERMINALS NORMALLY CLOSED
TERMINALS
LED ANODE (+)
LED CATHODE (-)
Ø .570 .110 (TYP)
.020 (TYP)
1.033 REF. .687 REF.
2.150 MAX.
1.463 MAX. .375
Ø .375
.25
Ø .875
Ø .500
.380 REF.
.625-24 UNEF-2A THD. TO
WITHIN .062 OF FLANGE
LP3-6
Momentary, 5/8” Threaded Rear Mount
NOTE:
For indicator light only, see LP5 series.
NORMALLY OPEN
TERMINALS
NORMALLY CLOSED
TERMINALS
Ø .570
LED ANODE (+)
LED CATHODE (-)
.110 (TYP)
.020 (TYP)
1.283 REF.
1.713 MAX. .187 Ø .375
Ø .875
Ø .500
2.150 MAX.
.437
REF.
.310
.25
.380 REF.
.625-24 UNEF-2A THD. TO
WITHIN .062 OF FLANGE
NORMALLY OPEN
TERMINALS
NORMALLY CLOSED
TERMINALS
LED ANODE (+)
LED CATHODE (-)
.110 (TYP)
.020 (TYP)
1.130 REF.
2.150 MAX.
1.560 MAX.
Ø .375
.34
.25
Ø .570
.380 REF.
.469-32 UNS-2A THD. TO
WITHIN .062 OF FLANGE
LP3-3
Momentary, 5/8” Threaded Front Mount
LP3-4
Momentary, 15/32” Threaded Rear Mount
