- Carry current
The value of the current
which can be continuously applied to the relay contacts without opening
or closing them and within the permissible temperature rise limit.
- Dielectric strength
The critical value
at which a dielectric can withstand without rupturing when a high
tension voltage is applied for 1 minute between the same points as those
in the measurement of insulation resistance.
 Electrical service life
The life of a relay when it is
switched at the rated operating frequency with the rated load applied to
its contacts.
The electrical service life of the relay can be
determined from the service life curve based on the I1 (See
maximum switching capacity). For instance, the electrical service life
at the maximum operating current of 2 A is slightly over 300,000
operations ... *2. With a DC load, it may become difficult to break the
circuit of 48 V or more due to arcing. Be sure to check this using the
actual relay. Correlation between the contact ratings is as shown in the
figure in maximum switching capacity.- Impulse withstand voltage
The critical
value indicating the durability of a relay against momentary voltage
surges caused by lightning or generated when an inductive load is
switched.
- Insulation resistance
The resistance
offered by an insulating material when a voltage is applied between an
electric circuit such as a relay contact or coil and a grounded
non-current-carrying metallic part such as an iron core or core frame,
or between contacts.
- Maximum operating current
A current
which serves as a reference in determining the performance of the relay
contacts. When using a relay, be careful not to exceed this value.
- Maximum operating voltage
A voltage
which serves as a reference in determining the performance of the relay
contacts. When using a relay, be careful not to exceed this value.
 Maximum switching capacity
The maximum value of the load
capacity which can be practically switched without any problem. When
using a relay, be careful not to exceed this value. For example, when
operating voltage V1 is known, maximum operating current I1
can be obtained at the point of intersection on the characteristic curve
of maximum switching capacity below. Conversely, maximum operating
voltage V1 can be obtained if I1 is known.
Maximum
operating current (I1) =
Maximum
switching capacity [W(VA)]
Operating
voltage(V1)
Maximum operating voltage (V1)
=
Maximum
switching capacity [W(VA)]
Operating
current (I1)
For instance, if operating voltage =
40 V then the maximum operating current = 2 A ... *1- Maximum switch capacity
- Maximum voltage
The maximum value of
permissible voltage fluctuations in the operating power supply of the
relay coil.
- Mechanical service life
The life of a
relay in terms of its mechanical functions when it is operated at the
maximum mechanical operating frequency without applying any load to its
contacts.
- Minimum permissible load
The value
indicated as a standard to show the limit of the switching capability of
a relay at minute load levels such as microelectronic circuits. This
value may vary depending on the operating frequency, ambient conditions,
expected reliability level, etc. of the relay. It is recommended to
double-check this under the actual load condition.
In this catalog
the minimum permissible load of each relay is indicated as a reference
value. It indicates failure level at a reliability level of 60% (l60).
(l60)=0.1
X 106/operation means that one failure is presumed to occur
per 10,000,000 operations at the reliability level of 60%.
- Must dropout voltage
The value of a
voltage at which a relay releases when the rated input voltage applied
to the relay coil in the operating state is decreased gradually.
- Must operate voltage
The value of a
voltage at which a relay operates when the input voltage applied to the
relay coil in the reset state is increased gradually.
- Operating frequency
The switching
frequency at which a relay operates and releases continuously, the
maximum operating frequency of a relay must satisfy its electrical or
mechanical life.
- Power consumption
The power
consumption of a relay is indicated as the value of the power (rated
voltage X rated current) to be consumed by the relay coil when the rated
voltage is applied to the coil. With AC operated relays, their power
consumption values are at the power frequency of 60 Hz.
- Rated load
The value which serves as a
reference in determining the performance of the relay contacts and is
indicated by a combination of operating voltage and operating current.
- Rated voltage
A voltage which serves
as a reference for control input.
- Shock
The shock resistance of a relay
is divided into two categories: "Mechanical durability" which
regulates the characteristic changes of, or damage to, the relay due to
considerably large shocks which may develop during the transportation or
mounting of the relay and "Malfunction durability" which
regulates the malfunction of the relay while it is in operation.
- Vibration
The vibration resistance of
a relay is divided into two categories: "Mechanical durability"
which regulates the characteristic changes of, or damage to, the relay
due to considerably large vibrations which may develop during the
transportation or mounting of the relay and "Malfunction durability"
which regulates malfunction of the relay due to vibration while it is in
operation.
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a = 0.002 f2A |
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a :
f :
A : |
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Acceleration of vibration
Frequency
Double amplitude |
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16475
Canyon Hills Road #3