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Sensing and Control
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Sensing and Control
Honeywell Inc.
11 West Spring Street
Freeport, IL 61032
www.honeywell.com/sensing
Manual Switches
Sealed Toggle Switches
NT Series
FEATURES
Completely sealed switching
chamber
Step-design case provides added
space between terminals to help
prevent shorting
1, 2 or 4-pole circuitry
Standard and pull to unlock levers.
2 or 3 positions, maintained and
momentary action
Spring-loaded actuating mechanism
provides excellent tactile feedback
High impact strength, non-tracking
case enhances electrical stability
Temperature range: –40 to 71°C
(–40 to 160°F)
UL recognized, File E12252, Vol. 1,
Section 44
CSA certified, File LR4442
CE approved
GENERAL INFORMATION
MICRO SWITCH NT Series toggle switch-
es meet severe environment application
needs for a rugged, cost-effective toggle
switch. Quality construction features in-
clude a molded-in elastomer seal be-
tween the toggle lever and bushing, and
between the cover and case. In addition,
the terminal inserts are molded into the
high impact strength thermoplastic case.
Complete sealing of the switching cham-
ber enables NT toggles to comply with UL
508, paragraph 13.3 hosedown test.
These switches can be used where pan-
els are subjected to periodic splash and
washdowns, such as are common to food
and beverage equipment. They will also
withstand exposure to heavy accumula-
tions of early morning dew that may con-
dense on the control panel in cabs of
vehicles left outdoors overnight.
PULL-TO-UNLOCK LEVERS
Pull-to-unlock toggle levers prevent acci-
dental toggle movement. The knobbed
toggle lever must be pulled out approxi-
mately .09 in. (2,3 mm) to change posi-
tions. Thirteen different locking configu-
rations are available. This lever style also
has a non-glare matte nickel finish.
CONSTRUCTION
UL AND CSA ELECTRICAL RATINGS
Rating Code*
L192
L191
Electrical Rating
10 amps, 125, 250, 277 VAC;
1
⁄
4
Hp, 125 VAC;
1
⁄
2
Hp, 250, 277 VAC; 3 amps,
125 VAC ‘‘L’’
15 amps, 125, 250, 277 VAC;
1
⁄
2
Hp, 125 VAC; 1 Hp, 250, 277 VAC; 5 amps,
125 VAC ‘‘L’’
* Referred to in order guides.
ELECTRICAL RATINGS
In Amperes
Elect.
Rating
Code
1
2
3
4
5
6
28 Volts DC
Ind.
12
10
15
10
12
10
Res.
20
15
20
18
20
18
Lamp
5
4
7
5
5
4
115 VDC
Res.
0.75
0.75
0.75
0.75
0.75
0.75
250 VDC
Res.
0.5
0.5
0.5
0.5
0.5
0.5
10
7
15
8
15
8
115 Volts AC
60 & 400 Hz
Ind.
Res.
15
15
15
11
15
11
Lamp
3
2
4
2
4
2
230 VAC
Res.
6
6
6
6
6
6
Application Note:
Honeywell MICRO SWITCH does
not
recommend the use of
silver cadmium oxide switch contacts in non-arcing loads. Non-arcing loads are
generally loads less than 12 volts and/or 0.5 amp. NT switches use silver cadmium
oxide contacts. For other options, contact the MICRO SWITCH Application Center at
1-800-537-6945.
108
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
1-815-235-6847 International 1-800-737-3360 Canada
Manual Switches
Sealed Toggle Switches
PULL-TO-UNLOCK OPTION
When ordering pull-to-unlock toggle list-
ings, add the suffix letter shown in the
chart below to the standard toggle listing
and the MS number. For example, to or-
LOCKING CONFIGURATIONS
A
B
D
E
F
G
NT Series
der a INTI-1 pull-to-unlock toggle switch
with the lever locked in the center posi-
tion, add the letter
E;
i.e., INTI-1E.
H
Locked In
Three Positions
J
Locked In
Center and
Extreme Position
(Keyway Side)
K
Locked Out
Of Center
Position
L
Locked In
Center Position
Locked In
Extreme Position
(Opposite Keyway)
M
Locked In
Extreme Position
(Keyway Side)
N
Locked Out Of
Center And
Extreme Position
(Keyway Side)
P
Locked Out Of
Center And
Extreme Position
(Opposite Keyway)
Locked In
Center And
Extreme Position
(Opposite Keyway)
Locked Out Of
Extreme Position
(Keyway Side)
Locked Out Of
And Into
Extreme Position
(Opposite Keyway)
Locked Out Of
Extreme Position
(Opposite Keyway)
Locked Out Of
And Into
Extreme Position
(Keyway Side)
MOUNTING DIMENSIONS:
(For reference only)
Panel cutout
Key:
0,0
=
mm
0.00
=
inches
With locking ring
Without locking ring
1-pole
2 & 4-pole
DIM ‘‘A’’
29,5/1.16
34,4/1.35
Note:
0
1,4/.06 MIN DEEP TO ACCOMMODATE LOCKING
RING. 15PA87 PANEL SEAL REQUIRES BLIND HOLE
TO INSURE SEAL INTEGRITY
NOTES:
1. Pull-to-unlock levers have 10,7/42 dia. knob
2. Locking ring, lockwasher, 2 hexnuts and terminal screws are
furnished unassembled.
Solder Terminals
Terminal Circuit Identification
Quick Connect Terminals
Bushing mounting
torque is 10–15
in./lbs.
Terminal screw
mounting torque is 5
in./lbs. max.
110
Honeywell MICRO SWITCH Sensing and Control 1-800-537-6945 USA
1-815-235-6847 International 1-800-737-3360 Canada
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