1NT
|
SERIES
Introduction
FIXED TEMPERATURE THERMOSTATS
Single throw, snap-action, fixed temperature thermostat suitable for a variety of Industrial and commercial applications. 1NT is recognized by agencies
around the world and depending on its configuration and application, is widely used as a regulating thermal switch, over-temperature control or pilot
duty control switch.
Features
• ISO9001: 2000 certification
• Ambient temperature rating from -40ºC to 240ºC (-40ºF to 464ºF)
• 1NT base provides:
- Low cost
- High temperature capability
- Clean processing
- High impact strength
- Low static generation
• Many termination and mounting configurations available
• Switch actions:
- Automatic reset: Available with both normally open and normally
closed switch logic
- Manual reset: Mechanical reset device
- Trip free manual reset: UL M2 class rating that resists consumer
tampering
- One shot: meets agency requirements for single operation device
Applications
• Power Distribution
• Automation
• Power Supplies
• Heating Systems
• HVAC
• Gas and Electric Furnace
• Boilers
• Espresso Machines
• Refrigeration
• Electric motors
• Heating Elements
• Laboratory Equipment
• Medical Equipment
• Automotive & HVOR
• Panel Heaters
Page 1
Copyright © 2018 Sensata Technologies, Inc.
www.sensata.com
STANDARD CONSTRUCTIONS
All dimensions mm (in.)
Options shown: 90° – 1/4” Q.C. terminals with
Surface mount flange
ø3.72
(.147)
Ref.
High Profile Construction
Low Profile Construction
4 Post Options shown: 45°– 1/4” Q.C. terminals
with 4 post and flat Al cup
30.0
(1.181)
Max.
Manual Reset Construction
Options shown: Flat 1/4” Q.C. terminals with
Airstream mount cup
23.8
(.937) Ref.
2.6
(.102)
Max.
ø16.0
(.630) Max.
30.2
(1.189)
Max.
23.8
(.937) Ref.
16.6 Max.
(.654)
ø19.4
(.764) Max.
6.5
(.256)
Max.
ø14.7
(.579)
Max.
22.1
(.870)
Max.
12.52
(.493)
Max.
6.65
(.262)
Min.
ø14.7
(.579) Max.
34.2 (1.346) Max.
ø14.6
(.575) Max.
ø16.0
(.630)
Max.
ø14.7
(.579)
Max.
ø3.7 (.146) Ref.
5.6
(.220) Max.
12.5
(.492) Max.
12.9
(.508)
Max.
ø16.0
(.630)
Max.
4.4
(.173)
Max.
4.3
(.170)
Max.
30.4
(1.197)
Max.
12.5
(.492)
max.
20.8
(.819)
Max.
Part Types by Construction
1NT01 Auto Reset / Silver Contacts
1NT11 Auto Reset / Gold Contacts
1NT09 One Shot: -35°C (-31°F) Reset
1NT10 One Shot: 0°C (32°F) Reset
1NT02 Auto Reset / Silver Contacts
1NT02TL Low Profile / One Shot
1NT20 Auto Reset / Gold Contacts
1NT08 Manual Reset / Silver Contacts
1NT12 Manual Reset / Gold Contacts
1NT15 Trip Free MR / Silver Contacts
1NT19 Trip Free MR / Gold Contacts
STANDARD TEMPERATURES, TOLERANCES AND DIFFERENTIAL
Manual Reset and One-Shot Thermostats
Nominal Top
Temperature
C
<60
61 TO 160
161 TO 204
F
<140
141 to 320
321 to 399
Open
Tolerances
C
±4.0
±5.0
±6.0
F
±7.5
±9.0
±11.0
MOVABLE
ARM
CUP
BIMETALLIC
DISC
KAPTON
INSULATOR
SPRING
METAL TO METAL
TERMINAL JOINT
THERMOPLASTIC BASE
Page 2
Copyright © 2018 Sensata Technologies, Inc.
www.sensata.com
Automatic Reset Thermostats
Nominal Top
Temperature
˚C
18 to 27
28 to 80
and
81 to 93
(1)
94 to 121
(1)
˚F
65 to 80
81 to 176
and
177 to 199
200 to 249
(1)
Min. Bottom
Temperature
˚C
-33
-33
50
˚F
-26
-26
122
Differential
˚C
11 to 16
17 to 21
22 to 33
11 to 13
14 to 16
17 to 33
11 to 16
17 to 21
22 to 33
34 to 55
14 to 21
21 to 33
34 to 55
22 to 33
34 to 44
45 to 55
22 to 33*
34 to 44
45 to 55
˚F
20 to 29
30 to 38
39 to 59
20 to 23
24 to 29
30 to 59
20 to 29
30 to 38
39 to 59
60 to 99
24 to 38
39 to 59
60 to 99
39 to 59
60 to 79
80 to 99
39 to 59
60 to 79
80 to 99
˚C
Standard Tolerances
Open
˚F
±5.5
±5.5
±5.5
±5.5
±5.5
±5.5
±6.5
±6.5
±6.5
±10.0
±7.5
±7.5
±10.0
±9.0
±10.0
±10.0
±9.0
±10.0
±10.0
˚C
±4.0
±4.5
±5.5
±4.0
±4.5
±5.0
±4.5
±5.5
±6.5
±11.0
±5.5
±8.0
±11.0
±9.0
±11.0
±11.0
±9.0
±11.0
±11.0
±3.0
±3.0
±3.0
±3.0
±3.0
±3.0
±3.5
±3.5
±3.5
±5.5
±4.0
±4.0
±5.5
±5.0
±5.5
±5.5
±5.0
±5.5
±5.5
Close
˚F
±7.5
±8.5
±10.0
±7.5
±8.5
±9.0
±8.5
±10.0
±12.0
±20.0
±10.0
±14.5
±20.0
±16.5
±20.0
±20.0
±16.5
±20.0
±20.0
50
122
122 to 149
250 to 300
50
122
150 to 177
301 to 350
50
122
178-204
(1)
(2)
(2)
351 to 399
50
122
Not valid for Fan Devices
Top Temp for Fan Devices cannot exceed 380°F (193°C)
ACCESSORIES AND OPTIONS
Flanges
Fixed Rotation Surface
Mount Flange 57336
Loose Ear Surface Mount
Flange 27183
Material: Aluminum
Available mounting rotation relative
to terminals - 90 ˚ with Aluminum
-0 ˚, 90˚ / or 57˚, 127˚, 135˚ CCW
with Nickel Plated Steel
Wide Eared – Fixed Rotation
Mounting Flange 57337
Material: Nickel Plated Steel
Available mounting rotation
relative to terminals - 45˚ CCW
Bolt On Assembly 73972
Thread
Specs:
Metric:
M4 x 0.7 - 6G
M5 x 0.8 - 6G
6.15, 7.00, 8.00,
9.00 (with M4)
8.00 (with M5)
English:
6 x 32 - 1/2“ Long
8 x 32 - 1/4” Long
Zinc Plated Steel
Aluminum
13.74
(.541) Max.
Stud
Length:
6.5
(.256) Max.
19.4
(.764)
Max.
23.8
(.937)
Ref.
ø3.72
(.147)
Ref.
6.5
(.256) Max.
ø 14.9 Hole
(.587) Ref.
19.4
(.764)
Max.
22.5
(.886) Max.
2.95
(.116)
Ref.
Metric:
Material:
31.75
(1.250) Ref.
4.75.
(.187)
Max.
Stud:
Cap:
18.4
(.724) Max.
23.8 (.937)
Ref.
18.4
(.724)
Max.
3.81
(.150)
Max.
3.72
(.146) Ref.
43.28 (1.704) Max.
18.4 (.724) Max.
0.38
(.015) Ref.
Lgth. Varies
3.81(.150)
Max.
15.90
(.626) Max.
0.38
(.015) Ref.
3.51
(.139) Max.
0.38
(.015) Ref.
Page 3
Copyright © 2018 Sensata Technologies, Inc.
www.sensata.com
Cup Styles
Airstream Mount Integral Cup
57611
Flat Cup 73926
Materials: Aluminum,
Stainless Steel or Copper
3NT Flange Cup 57366
Material: Aluminum
Available mounting rotation relative
to terminals – O or 90 Closed Bottom
Only
ø3.7
(.146) Ref.
23.8
(.937) Ref.
Material: Aluminum or Copper
Closed Bottom Only
Airstream Mount Integral Cup 27185
Material: Stainless Steel
Available mounting rotation relative to
terminals
0˚, 45˚ or 90˚ with Closed Bottom
0˚ or 90˚ with Open Bottom
See Note:.
23.8
(.937) Ref.
16.26
(.640) Max.
19.7
(.776)
Max.
5.5
(.217)
Max.
20.8
(.819)
Max.
30.2
(1.189) Max.
0.34 (.013) Ref.
0.30
(.012) Ref.
3.94
(.155) Max.
20.8
(.819)
Max.
30.2
(1.189) Max.
Hole
Optional
16.0
(.630)
Max.
16.0
(.630)
Max.
4.5
(.177) Max.
0.5 (.020)
Ref.
0.25 (.010) Ref.
16.5
(.650)
Max.
4.4 (.173) Max.
Note:
Available Diameter Mounting Holes
with open bottom: 3.7 (.146)
with closed bottom: 3.7(.146) / 4.2(.165) or none
16.0
(.630) Max.
Airstream Mount Integral
Cup (slotted mounting holes)
57367
Wide-Eared Integral Cup
57608
Material: Stainless Steel
Available mounting rotation
relative to terminals - 0˚ or 90˚
Closed Bottom Only
43.28
(1.704) Max.
“Tear-Drop” Integral Cup
57609
Material: Stainless Steel
Available mounting rotation
relative to terminals - 0˚ or 90˚
Closed Bottom Only
15.87
(.625)
Ref.
22.50
(.886)
Max.
Large Oval Integral Cup
59122
Material: Aluminum
Available mounting rotation relative
to terminals - 0˚ or 90˚ Closed
Bottom Only
4.5
(.177)
Ref.
24.5
(.965) Ref.
20.15
(.793)
Max.
3.4
(.134)
Ref.
Material: Aluminum
Available mounting rotation
relative to terminals
0˚, 45˚ or 90˚ with Closed Bottom
0˚ or 90˚ with Open Bottom
1.57
(.062) Ref.
38.3
(1.508)
Max.
HOLE
OPT.
39.67
(1.562) Ref.
22.50
(.886)
Max.
31.75
(1.250) Ref.
ø.475
(.187)
Ref.
32.15
(1.266)
Max.
.475
(.187)
Ref.
0.25
(.010) Ref.
21.72
(.855)
Max.
11.3
(.445)
Max.
0.5
(.020)
Ref.
16.5
(.650)
Max.
5.5
(.217) Max.
0.25
(.010) Ref.
16.0
(.630)
Max.
4.6 (.181)
Max.
Note:
4.6
o mounting option is also available
(.181)
90
with 57612 teardrop shaped stiffening
Max.
flange upon customer request.
16.0
(.630)
Max.
.438
(.173)
Ref.
51.1
(2.010) Max.
. 0.33
(.013) Max.
.33
(.013)
Ref.
16.0
(.630)
Max. 5.3 (.209) Max.
Page 4
Copyright © 2018 Sensata Technologies, Inc.
www.sensata.com
Standard Terminal
Solder Terminal 27182*
Material: Tin Plated Brass
Crimp Terminal 27184*
Material: Tin Plated Brass
27132 27162* 27163
Thickness (A): 0.8(.031) 0.5(.020) 0.8(.031)
Width (B): 6.3(.250) 4.8(.187) 4.8(.187)
Materials: Brass - Solid, Ni, Ag, or Tin Plated
Steel - Nickel Plated
15.62
(.615)
Max.
Quick Connects
5.7
(.224)
Max.
2.8
(.110) Ref.
3.5
(.138)
Ref.
2.6
(.102)
Ref.
“B”
ø 3.22 (.127) Ref.
Positions
90o
0.50
(.020)
Ref.
0.50
(.020)
Ref.
Flat
45o
“A”
Screw Terminal 57200
Material: Nickel Plated Steel
M3 x 0.5 Class 6H Thread
Weld Terminal 57201
Material: Nickel Plated Steel
Weld Terminal 57312*
Material: Nickel Plated Steel
Narrow
Tab
4.45
(.175) Max.
.396
(.156) Ref. Wide
Tab
3.55
(.140) Ref.
5.6
(.220) Ref.
0.8
(.032)
Ref.
6.42
(.253) Max.
.254
(.100)
Ref.
6.35
(.250)
Ref.
.071
(.028)
Ref.
0.50
(.020) Ref.
5.6
(.220) Max.
0.50
(.020) Ref.
*10A Max. on all terminals 0.51 (.020 thick
All dimensions mm (in.)
ORDERING OPTIONS
The Temperature Code is required to set up or choose the unique part
number for your application requirements.
Temperature Code
EXAMPLE
Family
See Standard Construction Table
Special Processing
A
- Wire Lead Assy
E
- Exposed Disc
Switch Type
L
-
Limit
(3)
switch opens on temperature rise
F
-Fan
(4)
switch closes on temperature rise
ID Number
Unique Number Designated by the factory to indicate all other attributes including
Temperatures, Terminals or connectors, Mounting Options, Special Markings, and
other special customer requested requirements.
(3)
(4)
1NTXX
E
L
XXXX
EXAMPLE
Operating Temperature
L
- Limit
F
- Fan
Operating Temperature
Nominal Open
Temperature
Temp. Code
C
- Celsius
F
- Fahrenheit
Differential
## Nom. Open to Nom. Close
MR Manual Reset
L
150
F
30
Limit switch opens on temperature rise
Fan switch closes on temperature rise
Page 5
Copyright © 2018 Sensata Technologies, Inc.
www.sensata.com
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