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Back to Control Thermostats |
5
Amp Series 
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M3
5
Amp - M3, M3(Z), M2, M2F, MQT5S/MQT5S(Z)
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See Technical Information
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Applications
Freeze Protection, Medical Applications, Food Warming,
Fan Control, Heating Blankets, Thermo-Electric Heaters,
LCD Displays |
| 5
amp. Series
(AC125V/5A, AC250V/3A, DC12V/5A, DC24V/3A) -10°C~110°C
Each model is available in a double
sealed construction. |
Features:
1) 5 Amp. capacity in a compact body.
2) Long life and small differential thermostat.
3) SPST Contacts
X=NC, Y=NO
Contacts set on rise in temp.
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Regarding
the lead;
AWM1015/AWG20 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG20 gray 150mm length is the
standard for 76°C or higher
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Features:
1.) 5 Amp. capacity (main contact) as specified
in part number.
2.) Back contact capacity: 60% of main contact capacity.
3.) Long life and small differential thermostat.
4.) Main contact lead is black, movable contact
is white and back contact is red as standard.
5.) Standard "C" type contact (SPDT)
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Regarding
the lead;
AWM1015/AWG20 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG20 gray 150mm length is the
standard for 76°C or higher
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Features:
1.) It is a thin 5 Amp. version and has no back
contact.
2.) Only D rank DIFF. available.
3.) Other specifications are the same as the M3
Model.
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Regarding
the lead;
AWM1015/AWG20 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG20 gray 150mm length is the
standard for 76°C or higher
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Features:
1.) A fuse connected in series with the M2 Model
to insure safety.
2.) Other specifications are the same as the M2
Model.
3.) For fuse operating temperature, consult us.
4.) Choose a fuse temperature of 25 higher than
the thermostat set temperature.
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Regarding
the lead;
AWM1015/AWG20 black 150mm length is the
standard for 75°C or lower
AWM3271/AWG20 gray 150mm length is the
standard for 76°C or higher
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Features:
1.) While a near complete seal 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 to the lead tip.
2.) Back contact capacity: 60% of main contact capacity.
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Standard
lead wires are SVHF, 500mm long.
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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~65°C |
66°C~75°C |
76°C~110°C |
| Diff
\ Cont. Config. |
X |
Y |
X |
Y |
X |
Y |
X |
Y |
X |
Y |
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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 |
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C
(5°C~8°C) |
±4 |
±4 |
±3 |
±3 |
±4 |
±4 |
±5 |
±5 |
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D
(8°C~12°C) |
±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 cycle life is standard)
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Voltage |
Current |
M3/M3Z/5S/5SZ |
M2/M2F |
| Diffential
rank |
Current
(unit power factor 1) |
Differential
rank |
Current
(unit power factor 1) |
– |
DC
48V |
A |
0.1A
~ 0.3A |
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B |
0.1A
~ 0.5A |
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| C |
0.1A
~ 0.8A |
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D |
0.1A
~ 0.8A |
D |
0.1A
~ 0.8A |
AC250V |
DC
24V |
A |
0.5A
~ 1.5A |
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B |
0.5A
~ 2A |
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| C |
0.5A
~ 3A |
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D |
0.5A
~ 3A |
D |
0.5A
~ 3A |
AC
125 V |
DC
12V |
A |
0.5A
~ 3A |
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B |
0.5A
~ 4A |
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| C |
0.5A
~ 5A |
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D |
0.5A
~ 5A |
D |
0.5A
~ 5A |
NOTE
:
1.“5 Ampere Series” represents the standard
maximum current of M3 Model at AC 125V.
2.Maximum current is limited slightly lower for M3 and
5S Models due to heat generated inside the switches.
3.Crossbar contact is not available for the 5 Ampere
Series.
4.In the case of DC voltage, spark quenching will be
required between contacts depending on the load level. |
| Maximum
operating voltage: |
AC250V
max., DC48V max. |
| Temperature
setting range: |
-10°C-110°C
(tolerance/differential will change at higher temps.)(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) N Closed, or 1a (Y) N Open
1c (XZ or YZ) for M3(Z) /5S(Z). "C" Contact
SPDT |
| Operating
temperature range: |
-30°C~105°C
(standard),-30°C~125°C(special) (no icing, non
condensing)(use within 60 degrees 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
tolerance: |
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:
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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.
(see the illustration below.) It is recommended that
the thermostats be installed to minimize stresses applied
along the X axis. |
Double
Sealed Construction (improvement in water
and impact resistance increased)
1.
Increased Resistance to Water
Covering a thermostat with a plastic case and sealing
its lead wires with a plastic sealant is a
widely accepted approach to achieve a dust-proof and water-resistant
structure. Our
thermostats, such as the MQT series in this catalogue,
are of this design. Repeated material
expansion and contraction, and internal air pressure changes
caused by thermal cycle may
lead to wear of plastic case and sealant, which consequently
deteriorates sealing
performance. Our double sealed design, using a vinyl tube,
withstands severe environmental conditions for long periods
of time.
NOTES:
1.The soft vinyl tube must be taken care of to avoid damage.
2.Do not expose vinyl tube to the direct sunlight.
2. Increased impact resistance
Electrical
components such as relays and motors are not very resistant
against shocks. Dropping electrical components usually
results in damage and subsequent malfunction. Products
in the MQT Series are no exception. MQT Series products
are fragile to impacts in X direction and more resistive
to Y and Z direction impact. However, with the double
sealing method using soft vinyl tubes, impact resistance
is guaranteed for regular usage.
Impact resistance: 240G
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Model designation method |
For 5
Amp. Series with a back contact, a model name will
be, for example, M3 70XZB, where Z means contact
with the back contact. |
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Control
Thermostats
Canadian Thermostats & Control Devices Ltd.