Telecom relay 4078(OMRON G5V-2) 3V~48V , contact form 2C
20*9.9*12.2mm
Description:
A simple electromagnetic relay consists of a coil of wire wrapped
around a soft iron core (a solenoid), an iron yoke which provides a
low reluctance path for magnetic flux, a movable iron armature, and
one or more sets of contacts. The armature is hinged to the yoke
and mechanically linked to one or more sets of moving contacts. The
armature is held in place by a spring so that when the relay is
de-energized there is an air gap in the magnetic circuit. In this
condition, one of the two sets of contacts is closed, and the other
set is open. Other relays may have more or fewer sets of contacts
depending on their function. The relay also has a wire connecting
the armature to the yoke. This ensures continuity of the circuit
between the moving contacts on the armature, and the circuit track
on the printed circuit board (PCB) via the yoke, which is soldered
to the PCB.
When an electric current is passed through the coil it generates a
magnetic field that activates the armature, and the consequent
movement of the movable contact(s) either makes or breaks
(depending upon construction) a connection with a fixed contact. If
the set of contacts was closed when the relay was de-energized,
then the movement opens the contacts and breaks the connection, and
vice versa if the contacts were open. When the current to the coil
is switched off, the armature is returned by a force, approximately
half as strong as the magnetic force, to its relaxed position.
Usually this force is provided by a spring, but gravity is also
used commonly in industrial motor starters. Most relays are
manufactured to operate quickly. In a low-voltage application this
reduces noise; in a high voltage or current application it reduces
arcing.
Applications:
Relays are used wherever it is necessary to control a high power or
high voltage circuit with a low power circuit, especially when
galvanic isolation is desirable. The first application of relays
was in long telegraph lines, where the weak signal received at an
intermediate station could control a contact, regenerating the
signal for further transmission. High-voltage or high-current
devices can be controlled with small, low voltage wiring and pilots
switches. Operators can be isolated from the high voltage circuit.
Low power devices such as microprocessors can drive relays to
control electrical loads beyond their direct drive capability. In
an automobile, a starter relay allows the high current of the
cranking motor to be controlled with small wiring and contacts in
the ignition key.
General data:
| Contact form | 2C |
| Insulation resistance | 100MΩMin at500VDC |
| Dielectric strength between open contacts | 500VAC 50-60HZ(1 minute) |
| Dielectric strength between contacts and coil | 1000VAC 50-60HZ(1 minute) |
| Operate time | 6ms max. |
| Release time | 4ms max. |
| Ambient temperature | -30°C ~ +70°C |
| Shock resistance-Malfuction | 10G |
| Shock resistance-Destruction | 15G |
| Vibration resistance | 10-55Hz,1.5mm double amplitude |
| Ambient humidity | 40-85% RH |
| Weight | Approx 5g |
| Safety standard | UL,CE,CQC |
Coil data (@20°C)
Rated voltage (VDC) | Coil Resistance Ω(±10%) | Max Operate Voltage (VDC) | Min Release Voltage (VDC) | Max Applied Voltage (VDC) |
| 0.15W | 0.2W | 0.36W | 0.45W |
| 3 | 60 | 45 | 25 | 20 | 2.25 | 0.15 | 3.9 |
| 5 | 167 | 125 | 70 | 50 | 3.75 | 0.25 | 6.5 |
| 6 | 240 | 180 | 100 | 80 | 4.5 | 0.3 | 7.8 |
| 9 | 540 | 405 | 225 | 180 | 6.75 | 0.45 | 11.7 |
| 12 | 960 | 720 | 400 | 320 | 9 | 0.6 | 15.6 |
| 24 | 3840 | 2800 | 1600 | 1280 | 18 | 1.2 | 31.2 |
| 48 | - | 11520 | 6400 | 5100 | 36 | 2.4 | 62.4 |
Outline dimension(mm):
PCB board layout and Wiring diagram:
