Precision and High Reliability Thermostats
Table of Contents
Subject
DESCRIPTION
NOMENCLATURE
DEFINITION OF TERMS, NOTES
PRECISION THERMOSTATS
3001/3004 Series Non-Hermetic
3150 Series Low Profile Hermetic
3156 Series Low Level/Low Profile Hermetic
3100 Series Hermetic
3106 Series Low Level Hermetic
009048
Datasheet
Page
Number
1
2
3
4-5
6-7
8-9
10-11
12-13
14-15
Issue 3
DESCRIPTION
3800 Series Industrial Grade for Severe Duty
HIGH RELIABILITY MILITARY AND AEROSPACE
THERMOSTATS
Performance Qualifications, Applications
3153 Series Low Profile
3500 Series Military
3000 Series Custom Packaged
3MS1 QPL Series Military
3200 Series High Reliability
MOUNTING HARDWARE
Brackets, studs and terminations
REDI-TEMP THERMOSTATS
3100U REDI-TEMP Series
Thermostats can provide either temperature control or over-
temperature protection by breaking electrical contact when a
specified temperature is reached.
Honeywell manufactures a wide range of thermostats for a
variety of potential applications:
• Precision non-hermetic and hermetically-sealed
versions designed to serve infotech, transportation,
telecom, industrial, aircraft, medical equipment, radar,
communications, and electronic control systems needs.
• High reliability military and aerospace versions that meet
the unique needs of the military, aerospace and aviation
industries.
Honeywell can also integrate these thermostats in higher-
value cable assemblies, incorporating wire harness and
connectors.
Also available is a selection of pre-configured REDI-TEMP
Thermostats.
16
17-18
19-20
21
22-23
24
26-30
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Precision and High-Reliability Thermostats
NOMENCLATURE
The nomenclature given in Figures 1 and 2 is provided for reference only.
Figure 1. Precision Thermostat Nomenclature
XXXXXXX
Series
*
3100
3106
3150
3800
3000
3001
3004
3100U
3106U
3150U
3001U
3100UX
3106UX
3150UX
XXXX
XXXX
Customer-Specific Features
Temperatures
Differentials
Epoxy
Tolerances
Contacts
Leads
Terminal/Bracket Configuration
Approvals
*
:
U = UL
UX = UL 240 Vac
*Some series may be UL/CSA approved even if there is no separate catalog listing. See series
pages for individual product information.
Figure 2. High Reliability Military and Aerospace Thermostat Nomenclature
XXXX
Series
1
3200
3MS1
3500
3153
3000
Basic Construction
EM = Engineer Model
(Applies to 3200 Series only)
XX - XXXX
XXXX
Customer-Specific Features
Temperatures
Differentials
Epoxy
Tolerances
Contacts
Leads
Terminal/Bracket Configuration
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Precision and High Reliability Thermostats
DEFINITION OF TERMS
•
•
•
•
•
•
Automatic Reset:
A type of thermostat that will automatically reset at a specific temperature (i.e. a thermostat operates at
65,5°C [150°F] and resets at 48,89°C [120°F]).
Bimetal:
Two dissimilar metals bonded together to form the material for manufacturing thermally-sensitive discs which
actuate the thermostat.
Close on Rise (COR):
Refers to operation of the contacts. When the temperature rises to its set point, the contacts close or
make contact and complete the circuit.
Contact Resistance:
The value of resistance measured between the terminals.
Dielectric Strength:
The value of insulation between two electrically conducting parts. It may be tested by the application of a
predetermined overvoltage for a specified time.
Differential:
The temperature difference between the operate and reset set points, also known as operate and reset.
-
Nominal:
The temperature difference between nominal set points regardless of tolerance.
-
Maximum:
The temperature difference between the operate and reset points.
-
Minimum:
Minimum number of degrees between actual open and closing set points.
Exposure Temperature:
Thermal environment of a device during application operation.
FLA (Full Load Amps):
Current taken from the line by the motor when the motor is yielding the rated hp at the rated voltage
and frequency.
Life Cycles:
The endurance rating of the thermostat expressed in number of operations with stated electrical load applied.
Temperature limit application = open or rise.
LRA (Locked Rotor Amps):
The amount of current the motor can be expected to draw under starting conditions when full
voltage is applied, also known as starting inrush current.
Manual Reset:
A bimetal thermostat with a reset button that must be pressed to reset the contacts.
Open on Rise (OOR):
Refers to the operation of contacts. When the temperature rises to its set point the contacts open,
terminating the circuit.
Overmold:
Encapsulation with an insulating material.
Phenolic:
Thermoset plastic used for the insulating body of the thermostat.
Set Point:
The nominal temperature at which the thermostat operates.
SPST (Single Pole/Single Throw):
A switch with one current path which can be either open or closed.
Tolerance:
The allowable range above and below the set point temperature.
Operate:
Change of state when the thermostat reaches its set point.
Reset:
Change of state when the thermostat returns to its original condition prior to operation.
•
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NOTES
•
Standard Temperature Characteristics Tables:
-
Temperatures:
Please consult applications engineering for temperature ranges, tolerances and differentials not noted.
The operating temperature ranges include tolerances.
-
Tolerances:
The ± tolerances given have been established after review of many thermostat applications. Attempts should
be made to establish the widest acceptable tolerance possible.
UL and CSA Approvals:
12,7 mm [0.5 in] thermostats are available with multiple agency approval for incorporation into
equipment.
Fan control applications:
Require thermostat set points to be derated by 20°C from the equivalent temperature limit
application. They also close on rise.
•
•
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Precision and High-Reliability Thermostats
3001/3004 Series Non-Hermetic Thermostats
The 3001/3004 Series is a factory pre-set, single-pole, single-throw thermal switch
available to open and close on temperature rise. The 3001 has a low-profile that
allows it to be used in most applications where a non-hermetic precision thermostat
is required for tight tolerances and the 3004 has a metal sleeve rivet construction.
A metal closure makes the phenolic base dustproof and also provides thermal and
electrical isolation for the silver contacts.
Table 1. 3001/3004 Series Standard Operating Temperature Characteristics*
Operating
Temperature
Range
Tolerance
Open
°C [°F]
±3,9 [±7]
±3,3 [±6]
±3,3 [±6]
±2,8 [±5]
±2,8 [±5]
±2,8 [±5]
±2,8 [±5]
26,7°C to 93,3°C
[80°F to 200°F]
±2,8 [±5]
±2,8 [±5]
–
±2,2 [±4]
-
±3,9 [±7]
±3,9 [±7]
93,9°C to 148,9°C
[201°F to 300°F]
±3,3 [±6]
±3,9 [±7]
–
±3,3 [±6]
–
±5,6 [±10]
±5,6 [±10]
149,4°C to 168,3°C
[301°F to 335°F]
±4,4 [±8]
±5,6 [±10]
–
±4,4 [±8]
–
Close
°C [°F]
±5,0 [±9]
±3,9 [±7]
±4,4 [±8]
±3,9 [±7]
±2,8 [±5]
±3,9 [±7]
±3,3 [±6]
±2,8 [±5]
–
±2,8 [±5]
–
±2,2 [±4]
±4,4 [±8]
±3,9 [±7]
±3,9 [±7]
–
±3,9 [±7]
–
±3,3 [±6]
±6,7 [±12]
±5,6 [±10]
±5,6 [±10]
–
±5,6 [±10]
–
±4,4 [±8]
Standard Mean
Differential
°C [°F]
16,7 to 33,3 [30 to 60]
8,3 to 16,1 [15 to 29]
16,7 to 33,3 [30 to 60]
8,3 to 16,1 [15 to 29]
5,6 to 7,8 [10 to 14]
16,7 to 33,3 [30 to 60]
8,3 to 16,1 [15 to 29]
5,6 to 7,8 [10 to 14]
–
–
–
–
16,7 to 44,4 [30 to 80]
13,9 to 16,1 [25 to 29]
11,1 to 13,3 [20 to 24]
–
–
–
–
22,2 to 44,5 [40 to 80]
19,5 to 21,7 [35 to 39]
13,9 to 16,1 [30 to 34]
–
–
–
–
Optional Max.
Differential
°C [°F]
–
–
–
–
–
–
–
–
5,6 [10]
5,6 [10]
4,4 [8]
4,4 [8]
–
–
–
8,3 [15]
8,3 [15]
6,7 [12]
6,7 [12]
–
–
–
11,1 [20]
11,1 [20]
10,0 [18]
10,0 [18]
H
G
F
E
I
J
A
-17,8°C to 0°C
[0°F to 31°F]
0°C to 26,1°C
[32°F to 79°F]
D
A
Contacts
B
Bimetal disc
C
Ceramic transfer pin
D
Metal closure
E
Phenolic insulator
C
B
F
Contact arm
G
Metal sleeve (3004 only)
H
Phenolic base
I
Rivet (3004 only)
J
Terminal
3001: Not UL/CSA approved.
3001U Vac only: UL/CSA approved.
3004 Vac and hp only: UL/CSA approved.
Potential applications:
• Computers
• Office equipment
• Blood analyzers
*Operating temperatures are available in 5°C [8°F] increments between 40°C to 120°C [104°F to
248°F].
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Precision and High Reliability Thermostats
Table 2. 3001/3004 Series Specifications
Characteristic
Switch type
Reset type
Amperage
Voltage
Operating temperature range
Parameter
SPST
automatic
see Tables 3, 4, 5
120 Vac
-17,8°C to 150°C [0°F to 302°F]
MIL-STD-202 Method 301
3001: 1500 Vac 60 Hz, terminal to case
3004: 2000 Vac 60 Hz, terminal to case
MIL-STD-202 Method 302 Cond. B – 500 MOhm, 500 Vdc applied
MIL-STD-202 Method 307 – 50 mOhm
phenolic
silver alloy
plated brass or steel
aluminum, stainless steel or brass
stainless steel or brass
UL File E36103, CSA File LR21048
4 g [0.14 oz] (brackets and wire leads not included)
Environmental exposure range -17,8°C to 177°C [0°F to 350°F]
Dielectric strength
Insulation resistance
Contact resistance
Material:
base
contacts
terminals
closure
brackets
Approvals
Weight
Table 3. 3001 Contact Ratings
Life Cycles
5,000
10,000
25,000
50,000
100,000
30 Vac/dc
7A
6.5 A
6A
5.5 A
5A
120 Vac
6A
5A
4A
3.3 A
2A
240 Vac
3A
2.5 A
2A
1.5 A
1A
Table 4. 3001U Contact Ratings
Life Cycles
6,000
6,000
100,000
1
120 Vac
6A
1/10 hp
3A
240 Vac
1.5 A
1
–
–
250 Vac
1.5 A
1
–
–
CSA Rating
Table 5. 3004 Contact Ratings
Life Cycles
6,000
6,000
100,000
1
2
120 Vac
8 A
1,2
1/10 hp
1
4.0 A
1
250 Vac
4.0 A
1,2
–
2 A
1
UL Rating
CSA Rating
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