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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
1 Completely sealed switching
chamber
1 Step-design case provides added
space between terminals to help
prevent shorting
1 1, 2 or 4-pole circuitry
1 Standard and pull to unlock levers.
1 2 or 3 positions, maintained and
momentary action
1 Spring-loaded actuating mechanism
provides excellent tactile feedback
1 High impact strength, non-tracking
case enhances electrical stability
1 Temperature range: –40 to 71°C
(–40 to 160°F)
1 UL recognized, File E12252, Vol. 1,
Section 44
1 CSA certified, File LR4442
1 CE approved
CONSTRUCTION
GENERAL INFORMATION
MICRO SWITCH NT Series toggle switches meet severe environment application
needs for a rugged, cost-effective toggle
switch. Quality construction features include a molded-in elastomer seal between 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.
UL AND CSA ELECTRICAL RATINGS
Rating Code*
Electrical Rating
L192
10 amps, 125, 250, 277 VAC; 1⁄4 Hp, 125 VAC; 1⁄2 Hp, 250, 277 VAC; 3 amps,
125 VAC ‘‘L’’
L191
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
Ind.
Res.
1
2
3
4
5
6
12
10
15
10
12
10
20
15
20
18
20
18
28 Volts DC
115 Volts AC
60 & 400 Hz
115 VDC
250 VDC
Lamp
Res.
Res.
Ind.
Res.
Lamp
230 VAC
Res.
5
4
7
5
5
4
0.75
0.75
0.75
0.75
0.75
0.75
0.5
0.5
0.5
0.5
0.5
0.5
10
7
15
8
15
8
15
15
15
11
15
11
3
2
4
2
4
2
6
6
6
6
6
6
Complete sealing of the switching chamber enables NT toggles to comply with UL
508, paragraph 13.3 hosedown test.
These switches can be used where panels are subjected to periodic splash and
washdowns, such as are common to food
and beverage equipment. They will also
withstand exposure to heavy accumulations of early morning dew that may condense on the control panel in cabs of
vehicles left outdoors overnight.
PULL-TO-UNLOCK LEVERS
Pull-to-unlock toggle levers prevent accidental toggle movement. The knobbed
toggle lever must be pulled out approximately .09 in. (2,3 mm) to change positions. Thirteen different locking configurations are available. This lever style also
has a non-glare matte nickel finish.
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 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
Manual Switches
Sealed Toggle Switches
NT Series
NT 2-POSITION ORDER GUIDE
Circuits Made With Toggle At:
No.
of
Poles
1
2
4
Elect.
Rating
Code
Standard Lever
Pull-To-Unlock
Lever (Add suffix
to Standard Lever
Listing)
Keyway
Position
Opposite
Keyway
UL
Rating
Code
OFF
1-2
OFF*
1-2*
1-2*
2-3
2-3
2-3
OFF
2-3
L191
L191
L192
L192
L192
1
1
2
2
2
1NT1-2
1NT1-3
1NT1-4
1NT1-6
1NT1-8
11NT1-2
11NT1-3
11NT1-4
11NT1-6
11NT1-8
1NT91-2
1NT91-3
1NT91-4
1NT91-6
1NT91-8
D, F, G
D, F, G
F
F
F
OFF
1-2, 4-5
OFF*
1-2, 4-5 *
1-2, 4-5 *
2-3, 5-6
2-3, 5-6
2-3, 5-6
OFF
2-3, 5-6
L191
L191
L192
L192
L192
3
3
4
4
4
2NT1-2
2NT1-3
2NT1-4
2NT1-6
2NT1-8
12NT1-2
12NT1-3
12NT1-4
12NT1-6
12NT1-8
2NT91-2
2NT91-3
2NT91-4
2NT91-6
2NT91-8
D, F, G
F
F
D, F, G
F
OFF
1-2, 4-5, 7-8, 10-11
OFF*
1-2, 4-5, 7-8, 10-11 *
1-2, 4-5, 7-8, 10-11 *
2-3, 5-6, 8-9, 11-12
2-3, 5-6, 8-9, 11-12
2-3, 5-6, 8-9, 11-12
OFF
2-3, 5-6, 8-9, 11-12
L191
L191
L192
L192
L192
5
5
6
6
6
4NT1-2
4NT1-3
4NT1-4
4NT1-6
4NT1-8
14NT1-2
14NT1-3
14NT1-4
14NT1-6
14NT1-8
4NT91-2
4NT91-3
4NT91-4
4NT91-6
4NT91-8
D, F, G
F
F
D, F, G
F
Termination Style
Solder
Q-C
Screw
NT 3-POSITION ORDER GUIDE
Circuits Made With Toggle At:
No.
of
Poles
1
2
4
Center
Position
Opposite
Keyway
1-2
1-2*
1-2*
NONE**
NONE**
NONE**
1-2*
OFF
OFF
OFF
OFF
1-2
1-2
OFF
2-3
2-3
2-3*
2-3
2-3
2-3*
NONE**
L191
L192
L192
L191
L191
L192
L192
1
2
2
1
1
2
2
1NT1-1
1NT1-5
1NT1-7
1NT1-21
1NT1-31
1NT1-51
1NT1-61
11NT1-1
11NT1-5
11NT1-7
11NT1-21
11NT1-31
11NT1-51
11NT1-61
1NT91-1
1NT91-5
1NT91-7
1NT91-21
1NT91-31
1NT91-51
1NT91-61
ALL TYPES
E, F, K, L, M, N
E, L, N
E, F, K, M
E, F, K, M
E
E
1-2, 4-5
1-2, 4-5 *
1-2, 4-5 *
NONE*
NONE**
NONE**
1-2, 4-5 *
1-2, 4-5
1-2, 4-5
1-2, 4-5 *
1-2, 4-5 *
OFF
OFF
OFF
OFF
1-2, 4-5
1-2, 4-5
OFF
2-3, 4-5
1-2, 5-6
1-2, 5-6
1-2, 5-6
2-3, 5-6
2-3, 5-6
2-3, 5-6*
2-3, 5-6
2-3, 5-6
2-3, 5-6*
NONE**
2-3, 5-6
2-3, 5-6
2-3, 5-6
2-3, 5-6*
L191
L192
L192
L191
L191
L192
L192
L191
L191
L192
L192
3
4
4
3
3
4
4
3
3
4
4
2NT1-1
2NT1-5
2NT1-7
2NT1-21
2NT1-31
2NT1-51
2NT1-61
2NT1-12
2NT1-10
2NT1-50
2NT1-70
12NT1-1
12NT1-5
12NT1-7
12NT1-21
12NT1-31
12NT1-51
12NT1-61
12NT1-12
12NT1-10
12NT1-50
12NT1-70
2NT91-1
2NT91-5
2NT91-7
2NT91-21
2NT91-31
2NT91-51
2NT91-61
2NT91-12
2NT91-10
2NT91-50
2NT91-70
ALL TYPES
E, F, K, L, M, N
E, L, N
E, F, K, M
E, F, K, M
E
E
ALL TYPES
ALL TYPES
L, F, K, L, M, N
E, L, N
1-2, 4-5, 7-8,
10-11
1-2, 4-5, 7-8,
10-11*
1-2, 4-5, 7-8,
10-11*
NONE*
OFF
L191
5
4NT1-1
14NT1-1
4NT91-1
ALL TYPES
L192
6
4NT1-5
14NT1-5
4NT91-5
E, F, K, L, M, N
L192
6
4NT1-7
14NT1-7
4NT91-7
E, L, N
L191
5
4NT1-21
14NT1-21 4NT91-21
E, F, K, M
NONE**
1-2, 4-5, 7-8,
10-11
1-2, 4-5, 7-8,
10-11
OFF
2-3, 5-6, 8-9,
11-12
2-3, 5-6, 8-9,
11-12
2-3, 5-6, 8-9,
11-12*
2-3, 5-6, 8-9,
11-12
2-3, 5-6, 8-9,
11-12
2-3, 5-6, 8-9,
11-12*
NONE**
L191
5
4NT1-31
14NT1-31 4NT91-31
E, F, K, M
L192
6
4NT1-51
14NT1-51 4NT91-51
E
L192
6
4NT1-61
14NT1-61 4NT91-61
E
2-3, 5-6, 8-9,
11-12
2-3, 5-6
8-9, 11-12
2-3, 5-6, 8-9,
11-12
2-3, 5-6, 8-9,
11-12*
L191
5
4NT1-12
14NT1-12 4NT91-12
ALL TYPES
L191
5
4NT1-10
14NT1-10 4NT91-10
ALL TYPES
L192
6
4NT1-50
14NT1-50 4NT91-50
E, F, K, L, M, N
L192
6
4NT1-70
14NT1-70 4NT91-70
E, L, N
NONE**
1-2, 4-5, 7-8,
10-11*
1-2, 4-5, 7-8,
10-11
1-2, 4-5
7-8, 10-11
1-2, 4-5, 7-8,
10-11 *
1-2, 4-5, 7-8,
10-11*
OFF
OFF
2-3, 4-5, 7-8,
11-12
2-3, 4-5
2-3, 4-5, 7-8,
11-12
2-3, 4-5
Standard Lever
Termination Style
Screw
Solder
Q-C
Toggle/Rockers
Keyway
Position
OFF
Elect.
Rating
Code
Pull-To-Unlock
Lever (Add suffix
to Standard
Lever Listing)
UL
Rating
Code
* These positions are momentary. All others are maintained.
** Toggle lever is blocked from these products. Toggle becomes 2-position, with center being one extreme position.
Honeywell 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
109
Manual Switches
Sealed Toggle Switches
NT Series
PULL-TO-UNLOCK OPTION
When ordering pull-to-unlock toggle listings, add the suffix letter shown in the
chart below to the standard toggle listing
and the MS number. For example, to or-
der a INTI-1 pull-to-unlock toggle switch
with the lever locked in the center position, add the letter E; i.e., INTI-1E.
LOCKING CONFIGURATIONS
A
B
D
Locked In
Three Positions
Locked In
Center and
Extreme Position
(Keyway Side)
Locked Out
Of Center
Position
E
F
G
H
Locked In
Center Position
Locked In
Extreme Position
(Opposite Keyway)
Locked In
Extreme Position
(Keyway Side)
Locked Out Of
Center And
Extreme Position
(Keyway Side)
J
K
L
M
N
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)
Key:
0,0 = mm
0.00 = inches
Panel cutout
With locking ring
1-pole
2 & 4-pole
Without locking ring
Note:
0 1,4/.06 MIN DEEP TO ACCOMMODATE LOCKING
RING. 15PA87 PANEL SEAL REQUIRES BLIND HOLE
TO INSURE SEAL INTEGRITY
DIM ‘‘A’’
29,5/1.16
34,4/1.35
NOTES:
1. Pull-to-unlock levers have 10,7/42 dia. knob
2. Locking ring, lockwasher, 2 hexnuts and terminal screws are
furnished unassembled.
Terminal Circuit Identification
Solder Terminals
Quick Connect Terminals
110
Bushing mounting
torque is 10–15
in./lbs.
Terminal screw
mounting torque is 5
in./lbs. max.
Honeywell 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
This page intentionally left blank.
Toggle/Rockers
Honeywell 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
111
NT Series
Manual Switches
Flat Base Sealed Toggles and Rockers
FEATURES
1 Sealed switching chamber
1 1 or 2-pole circuitry
1 2 or 3 position maintained and
momentary action
1 Flat base with quick-connect
terminals – mating connectors are
available
1 Spring-loaded actuating mechanism
provides tactile feedback
1 High impact strength, non-tracking
case enhances electrical stability
1 Temperature range: –40 to 71°C (–40
to 160°F)
1 UL Recognized, File E12252, vol. 1,
section 44
1 CSA Certified, File LR4442
1 CE approved
UL AND CSA ELECTRICAL RATINGS
Rating Code*
Electrical Rating
L192
10 amps, 125, 250, 277 VAC; 1⁄4 Hp, 125 VAC; 1⁄2 Hp, 250, 277 VAC; 3 amps,
125 VAC ‘‘L’’
L191
15 amps, 125, 250, 277 VAC; 1⁄2 Hp, 125 VAC; 1 Hp, 250, 277 VAC; 5 amps,
125 VAC ‘‘L’’
ELECTRICAL RATINGS
In Amperes
28 Volts DC
Rating
Code
Ind.
Res.
1
2
3
4
12
10
15
10
20
15
20
18
115 Volts AC
60 & 400 Hz
115 VDC
250 VDC
Lamp
Res.
Res.
Ind.
Res.
Lamp
230 VAC
Res.
5
4
7
5
0.75
0.75
0.75
0.75
0.5
0.5
0.5
0.5
10
7
15
8
15
15
15
11
3
2
4
2
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.
112
GENERAL INFORMATION
MICRO SWITCH NT Series toggle switches
are designed to meet severe environment
application needs for rugged, cost-effective
manual switches. These flat base style
products are identical to the stepped
base style in construction and features.
The flat base allows for PC board or connector use for easy wiring/connection.
The flat base NT toggle switches are
provided with quick-connect (spade)
termination. Mating connectors are
available.
TERMINAL CIRCUIT IDENTIFICATION
Terminal identifications are referenced in
the order guides to indicate which circuits
are made in each toggle position (e.g.
‘‘1-2’’ refers to circuit closure through terminals 1 and 2).
Honeywell 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
Manual Switches
Flat Base Sealed Toggles
NT Series
NT 2-POSITION ORDER GUIDE
Circuits Made At:
No. of
Poles
1
2
Keyway
Position
Opposite
Keyway
UL Rating
Code
Electrical
Rating Code
Catalog
Listing
Toggle Q-C
OFF
1-2
OFF**
1-2**
1-2**
2-3
2-3
2-3
OFF
2-3
L191
L191
L192
L192
L192
1
1
2
2
2
31NT91-2
31NT91-3
31NT91-4
31NT91-6
31NT91-8
OFF
1-2, 4-5
OFF**
1-2, 4-5**
1-2, 4-5**
2-3, 5-6
2-3, 5-6
2-3, 4-6
OFF
2-3, 4-6
L191
L191
L192
L192
L192
3
3
4
4
4
32NT91-2
32NT91-3
32NT91-4
32NT91-6
32NT91-8
NT 3-POSITION ORDER GUIDE
Circuits Made At:
No. of
Poles
1
2
Keyway
Position
Center
Position
Opposite
Keyway
UL Rating
Code
Electrical
Rating
Code
Catalog
Listing
Toggle Q-C
1-2
1-2**
1-2**
NONE***
NONE***
NONE***
1-2**
OFF
OFF
OFF
OFF
1-2
1-2
OFF
2-3
2-3
2-3**
2-3
2-3
2-3**
NONE***
L191
L192
L192
L191
L191
L192
L192
1
2
2
1
1
2
2
31NT91-1
31NT91-5
31NT91-7
31NT91-21
31NT91-31
31NT91-51
31NT91-61
1-2, 4-5
1-2, 4-5**
1-2, 4-5**
NONE***
NONE***
NONE***
1-2, 4-5**
1-2, 4-5
1-2, 4-5
1-2, 4-5**
1-2, 4-5**
OFF
OFF
OFF
OFF
1-2, 4-5
1-2, 4-5
OFF
2-3, 4-5
1-2, 5-6
1-2, 5-6
1-2, 5-6
2-3, 5-6
2-3, 5-6
2-3, 5-6**
2-3, 5-6
2-3, 5-6
2-3, 5-6**
NONE***
2-3, 5-6
2-3, 5-6
2-3, 5-6
2-3, 5-6**
L191
L192
L192
L191
L191
L192
L192
L191
L191
L192
L192
3
4
4
3
3
4
4
3
3
4
4
32NT91-1
32NT91-5
32NT91-7
32NT91-21
32NT91-31
32NT91-51
32NT91-61
32NT91-12
32NT91-10
32NT91-50
32NT91-70
** These positions are momentary. All others are maintained.
*** Toggle lever is blocked from these positions. Toggle becomes 2-position, with center being one extreme
position.
MATING CONNECTORS ORDER GUIDE
Description
Catalog Listing
2-pole connector
19PA168-NT
1-pole connector, same package size as 2-pole connector
19PA169-NT
LOCKING CONFIGURATIONS
B
D
Locked In
Three Positions
Locked In
Center and
Extreme Position
(Keyway Side)
Locked Out
Of Center
Position
E
F
G
H
Locked In
Center Position
Locked In
Extreme Position
(Opposite Keyway)
Locked In
Extreme Position
(Keyway Side)
Locked Out Of
Center And
Extreme Position
(Keyway Side)
J
K
L
M
N
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)
Honeywell 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
113
Toggle/Rockers
A
This page intentionally left blank.
114
Honeywell 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
Manual Switches
Flat Base Sealed Toggles and Rockers
NT Series
MOUNTING DIMENSIONS (For reference only)
Toggle Switches
Honeywell 1 MICRO SWITCH Sensing and Control 1 1-800-537-6945 USA 1 F1-815-235-6847 International 1 1-800-737-3360 Canada
Toggle/Rockers
Bushing mounting torque is 10–15 in./lbs.
115
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