Download cd-79f-2-series narrow differential thermostats

CD-79F-2-SERIES NARROW DIFFERENTIAL THERMOSTATS
Description
This device is a thermostat, providing temperature control for hearings applications. A thermally sensitive bimetal
snap-element switches when it reaches a pre-set response temperature or a fixed current level, opening the circuit.
Current flows through the bimetal element, giving a combination of temperature and current protection. Heat transfer
occurs from all sides through convection or radiation.
Features
1)
2)
3)
4)
5)
6)
7)
Tight differential, excellent temperature control
Current and temperature sensitivity for maximum design flexibility
Wide selection of leads and insulating sleeves
Same side or opposite side terminations
Miniature size
Positive make and break with snap-action disc
Reliable temperature performance over life of thermostat
Applications
1)
2)
3)
4)
5)
6)
7)
Automotive seat heaters
Electric heaters
Water heaters
Anti-freeze sensors
Blanket heaters
Defrost heaters
Display cases
Technical Data
VOLTAGE
120 V AC
contact arrangement
normally closed
Standard contact resistance
Standard response temperature range
Standard tolerance
Approvals received / applied for
CURRENT RATING
Life expectancy (switching cycles)
(cosψ = 1.0, resistive loads)
5A
100.000
--------------o---------------o--------------<50 mΩ
+50°C to +185C°
+/-3 °C
+/-5 °C
UL / VDE
+/-7 °C
+/-10°C
Phone: (330) 966-3796
Fax: (330) 244-0190
5758 Foxboro Ave. NW
Canton, Ohio 44718
[email protected]
www.calcoelectric.com
CD-79F-2-SERIES NARROW DIFFERENTIAL THERMOSTATS
Installation Notes
When installing the thermostat, good heat transfer must be insured. The heat sensitive side of the switch (the base)
should be positioned on the heat source. Heat-conducting paste or lacquer improves heat transfer.
Please note that in the standard version the thermostat has an electrically live housing, and that when electrically
insulated, the thermal protector's effective switching temperature can be affected by reduced heat transfer through
the insulation. This should be kept in mind when selecting the appropriate temperature setting.
Temperature Set-Points / Tolerance
Temperatures graduated in 5C° increments
Tolerance, see “technical data”
Switching hysteresis 2C° to 10C° differential
Other differentials available, contact a sales engineer
Rate of temperature change from 0.1C° min. to max. 1.0C° /min.
Insulation decreases the thermal protector’s response time
Special response and reset temperatures available on request
Leads
The temperature rating of the connecting leads covers the nominal response temperature of the cutout as a minimum.
It also corresponds to the appropriate insulation class and dielectric strength. Leads or solid wires are available in
various lengths, cross-sections and qualities.
Phone: (330) 966-3796
Fax: (330) 244-0190
5758 Foxboro Ave. NW
Canton, Ohio 44718
[email protected]
www.calcoelectric.com
CD-79F-2-SERIES NARROW DIFFERENTIAL THERMOSTATS
CD-79F-2-SERIES NARROW DIFFERENTIAL THERMOSTATS
CD-79F-2-SERIES NARROW DIFFERENTIAL THERMOSTATS
Product Marking
Part Number Description
Example
CD
1
79
2
Definition of Part Number
1.
CD
=
2.
79
=
3.
F
=
F
=
4.
XXX
=
5.
A
=
=
6.
B
=
7.
5
=
F
3
XXX
4
A
5
B
6
5
7
Product Group
Type
Bimetal Internal Resistance Code
30 ohm/cir mil feet electrical resistivity of bimetal
Temperature rating consists of three digits from 000 up to 185** C
Construction Code
Code Terminals
Insulation
Leads
A
both one end no
no
B
opposite ends no
no
G
both one end yes
yes
H
opposite ends yes
yes
Auxiliary accessory code, additional letters A-Z or numerals 1-9 can be used.
Optional for final defined construction then assigned by maker, including insulating
sleeve and type of lead wire and length. Blank means single TP device without and
accessory including insulating sleeve. The numberal 2 designates the narrow differen
tial option.
Tolerance Code
5
Device is calibrated within +/- 5°C tolerance
7
Device is calibrated within +/- 7°C tolerance
10
Device is calibrated within +/- 10°C tolerance
Phone: (330) 966-3796
Fax: (330) 244-0190
5758 Foxboro Ave. NW
Canton, Ohio 44718
[email protected]
www.calcoelectric.com