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2
Amp Series  |
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MQT
2
Amp - MQT8K, MQT8H, MQT8KT, MQT8HT, MQT11H, MQT8H
(DS)
These thermostats were developed as
a small, inexpensive, high performance bimetal thermostat
which can be used as a controller. These thermostats
use a sharp, semipermanent, snap spring with a flat
non-distorting bimetal. Two bimetals are used for
increased sensitivity.
Applications
Freeze Protection, Medical Applications, Food Warming,
Fan Control, Heating Blankets, Thermo-Electric Heaters,
LCD Displays
•
See Technical Information
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| 2
amp. Series
(AC125V/2A, AC250V/1.3A, DC12V/2A, DC24V/1.3A) -10°C~110°C
Each model is available in a double
sealed construction. |
Features:
1.) Representative model of the 2Amp. series.
2.) Epoch making low price for a long life and small
differential thermostat.
3.) It can be mounted with only one screw. It is
most suitable for outside air
temperature detection.
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Regarding
the lead;
AWM1015/AWG22 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG22 gray 150mm length is the
standard for 76°C or higher
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Features:
1.) It is suitable for insertion into heater pads,
etc.
2.) The internal structure is the same as MQT8K.
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Regarding
the lead;
AWM1015/AWG22 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG22 gray 150mm length is the
standard for 76°C or higher
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Features:
1.) MQT8K with a tab terminal.
2.) Install a lead of your desired length into the
receptacle and use it by inserting the thermostat.
3.) We have the receptacle available.
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The
terminal is #110, Faston
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Features:
The usage is the same as MQT8KT.
The only difference is that it has no mounting hole.
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The
terminal is #110, Faston
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Features:
1.) Cases of MQT8K and 8H are widened and temperature
fuse is connected in series inside the case for
dual safety.
2.) Standard specifications for the fuse temperature
is 76°C/108°C/115°C/133°C/145°C.
3.) As for the fuse temperature, select the one
with a temperature 25°C or more higher than
the preset temperature of the thermostat.
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Regarding
the lead;
AWM1015/AWG22 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG22 gray 150mm length is the
standard for 76°C or higher
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Features:
1.) While a near complete sealing is achieved by double
sealing (DS), moisture intrusion by capillary action
at the tip of the lead cannot be avoided. Be careful
not to have water splash on the lead tip. |
Regarding
the lead;
AWM1015/AWG22 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG22 gray 150mm length is the
standard for 76°C or higher
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Ratings
and Characteristics:
Tolerance of Setting Temperature
and Differential vs. Setting Temperature
| Setting
Temp. |
-10°C~
-1°C |
0°C~50°C |
51°C~59°C |
60°C~65°C |
66°C~75°C |
76°C~110°C |
| Diff
\ Cont. Config. |
X |
Y |
X |
Y |
X |
Y |
X |
Y |
X |
Y |
X |
Y |
| A
(2°C~5°C) |
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±3 |
±3 |
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| B
(3°C~6°C) |
±4 |
±4 |
±3 |
±3 |
±4 |
±4 |
±4 |
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| C
(5°C~8°C) |
±4 |
±4 |
±3 |
±3 |
±4 |
±4 |
±4 |
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±5 |
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| D
(8°C~12°C) |
±4 |
±4 |
±4 |
±4 |
±4 |
±4 |
±4 |
±4 |
±5 |
±5 |
±5 |
±5 |
Note:
1. Above list shows the standard tolerance.
2. Special tolerance such as ±1.5 or ±2 will
be available.
Table
of contact capacity by voltage used and by DIFF. ranking
(100,000 times life as standard)
| Voltage |
Current |
Standard
contact |
Crossbar
contact (For micro current) |
| Diffential
rank |
Current
(unit power factor 1) |
Differential
rank |
Current
(unit power factor 1) |
– |
DC
48V |
A |
50mA
~ 0.3A |
A |
1mA
~ 100mA |
B |
50mA
~ 0.3A |
B |
| C |
50mA
~ 0.3A |
C |
D |
50mA
~ 0.6A |
D |
AC250V |
DC
24V |
A |
50mA
~ 0.6A |
A |
1mA
~ 100mA |
B |
50mA
~ 0.9A |
B |
| C |
50mA
~ 1.3A |
C |
D |
50mA
~ 1.3A |
D |
AC
125 V |
DC
12V |
A |
50mA
~ 1A |
A |
1mA
~ 100mA |
B |
50mA
~ 1.5A |
B |
| C |
50mA
~ 2A |
C |
D |
50mA
~ 2A |
D |
NOTE
:
1.“2 Ampere series” represents the standard
maximum current at AC125V.
2. A fluctuation by the unit power factor a half of
the current at unit power factor by 0.75 power factor,
1/5 of the current at unit power factor by 0.4 power
factor.
3. The spark killer might be required for a load in
direct voltage. |
| Maximum
operating voltage: |
AC250V
max., DC48V max. |
| Temperature
setting range: |
-10°C-110°C
(tolerance/differential will change in the higher temp.)(see
the above table) |
| Differential:
|
rank
A …… 3.5 ± 1.5 (2~5)°C
rank B ……4.5 ± 1.5 (3~6)°C
rank C ……6.5 ± 1.5 (5~8)°C
rank D ……10 ± 2 (8~12)°C |
| Contact
configuration: |
1b
(X), or 1a (Y) |
| Operating
temperature range: |
-30°C~85°C
(standard),-30°C~125°C(special) (no icing, no
condensing)(use within 60° above the set temperature.) |
| Insulation
resistance: |
100MΩ
or more |
| Contact
resistance: |
70mΩ
or less including lead wire resistance) |
| Withstanding
Voltage: |
AC2000V
for 2sec. (600V for 1minute between contacts) |
| Vibration
tolerance: |
Selected
from JIS·C·0911-1984
Constant vibration; 50Hz fixed/0.2mm fixed (1G)
Sweep vibration; 10~55Hz/0.35mm fixed ( 0.1~2.2G)
Withstands 2 hours each in directions X, Y and Z. |
| Impact
resistance: |
No
damage when dropped three times from the height of 40cm
onto a concrete floor (about 70G).
No damage for double sealed model when dropped three
times from the height of 1m onto a concrete floor (about
240G).
Withstands substantial impact after being put in a package
or mounted in equipment. |
| Life:
|
2
million mechanical operations, 100,000 electrical operations
at rated load. |
| Handling
precautions: |
The
thermostat withstands vibration and impact applied
along Y and Z axis,
but does not tolerate impact from X direction. It
is recommended that
the thermostats be installed to minimize stresses
applied along the X axis.
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Tab
terminal series (improvement in water
resistance and impact resistance increased)
A #110 tab comes out from the thermostat main body, and
a dedicated receptacle of a double pole combined type
is prepared as the corresponding receptacle.
Because the conventional type with a lead could not adapt
itself to lead length cases different from the standard
lead length (150mm), we changed it so that the customer
can freely select the lead length, which is a big improvement.
*It
is expected that the customer will make the connection
of the lead, with the length required by the customer,
and the female housing.
NOTE: Because No.110 tab · in connector comes in
a reel, connection by an automated machine is possible.
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Control
Thermostats
Canadian Thermostats & Control Devices Ltd.