G2R-1-DC24 Omron, G2R-1-DC24 Datasheet - Page 17

• Manufacturer Part Number: G2R-1-DC24
• Description: RELAY PWR SPDT 10A 24VDC PCB
• Manufacturer: Omron
• Series: G2Rr

Specifications of G2R-1-DC24

• Relay Type: General Purpose
• Contact Form: SPDT (1 Form C)
• Contact Rating (current): 10A
• Switching Voltage: 380VAC, 125VDC - Max
• Coil Type: Standard
• Coil Current: 21.8mA
• Coil Voltage: 24VDC
• Turn On Voltage (max): 16.8 VDC
• Turn Off Voltage (min): 3.6 VDC
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Circuit: SPDT (1 Form C)
• Contact Rating @ Voltage: 10A @ 250VAC
• Control On Voltage (max): 16.8 VDC
• Control Off Voltage (min): 3.6 VDC
• Coil Voltage Vdc Nom: 24V
• Contact Current Max: 10A
• Contact Voltage Ac Nom: 250V
• Contact Voltage Dc Nom: 30V
• Coil Resistance: 1100ohm
• Contact Configuration: SPDT
• Current, Rating: 10 A
• Dielectric Rating: 5000 VAC @ 50⁄60 Hz (For 1 Minute Between Coil and Contacts)
• Dimensions: 1.14 in. L x 0.51 in. W x 1.40 in. H
• Function: Power
• Number Of Pins: 5
• Power, Rating: 2500⁄300 VA⁄W
• Resistance, Coil: 253 Ohms
• Standards: UL, CSA, VDE, CE
• Temperature, Operating, Maximum: 70 °C
• Temperature, Operating, Minimum: -40 °C
• Termination: Through Hole
• Voltage, Control: 24 VDC
• Voltage, Rating: 380 VAC
• Contact Rating: 10 A
• Contact Termination: Solder Pin
• Mounting Style: Through Hole
• Power Consumption: 530 mW
• Contact Material: Silver Alloy
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: G2R-1-DC24; G2R1DC24; Z2840

■ Conductor Width and Thickness
The following thickness of copper foil are standard: 35 μm and
70 μm. The conductor width is determined by the current flow and
allowable temperature rise. Refer to the chart below.
■ Conductor Pitch
The conductor pitch on a PCB is determined according to the insula-
tion resistance between conductors and the environmental condi-
tions under which the PCB is to be placed. The following graph
shows the general relationship between the voltage between conduc-
tors and the conductor pitch on a PCB. However, if the PCB must
conform to safety organization standards (such as UL, CSA, VDE,
etc.), priority must be given to fulfilling their requirements.
A = w/o coating at altitude of 3,000 m max.
B = w/o coating at altitude of 3,000 m
C = w/coating at altitude of 3,000 m max.
D = w/coating at altitude of 3,000 m or higher
Conductor Width and Carry Current
(according to IEC Pub326-3)
or higher but lower than 15,000 m
Voltage between Conductors vs.
Conductor Pitch
0.03 0.05 0.07 0.1
Conductor pitch (mm)
305 g/m
35 mm
0.3
2
610 g/m
70 mm
0.5 0.7
100°C
75°C
50°C
40°C
30°C
20°C
10°C
2
A
B
C
D
Sectional area
(mm )
Electromechanical Relays
2
■ Temperature and Humidity
PCBs expand or contract with changes in temperature. Should
expansion occur with a relay mounted on the PCB, the internal com-
ponents of the relay may be shifted out of operational tolerance. As a
result, the relay may not be able to operate with its normal character-
istics.
PCB materials have “directionality,” which means that a PCB gener-
ally has expansion and contraction coefficients 1/10 to 1/2 higher in
the vertical direction than in the horizontal direction. Conversely, its
warp in the vertical direction is 1/10 to 1/2 less than in the horizontal
direction. Therefore, take adequate counter-measures against
humidity by coating the PCB. Should heat or humidity be entirely too
high, the relay’s physical characteristics will likewise be affected. For
example, as the heat rises the PCB’s insulation resistance degrades.
Mechanically, PCB parts will continue to expand as heat is applied,
eventually passing the elastic limit, which will permanently warp com-
ponents.
Moreover, if the relay is used in an extremely humid environment, sil-
ver migration may take place.
■ Gas
Exposure to gases containing substances such as sulfuric acid, nitric
acid, or ammonia can cause malfunctions such as faulty contacting
in relays. They can also cause the copper film of a PCB to corrode, or
prevent positive contacts between the PCB’s connectors. Of the
gases mentioned, nitric acid is particularly damaging as it tends to
accelerate the silver migration. As a counter-measure against gas
exposure damage, the following processes on the relay and PCB
have proved useful.
■ Vibration and Shock
Although the PCB itself is not usually a source of vibration or shock, it
may simplify or prolong the vibration by sympathetically vibrating with
external vibrations or shocks. Securely fix the PCB, paying attention
to the following points.
Outer Casing,
housing
Relay
PCB, Copper Film
Connector
Rack Mounting
Screw Mounting
Mounting Method
Item
Technical Information
No gap between rack’s guide & PCB
Securely tighten screw. Place heavy compo-
nents such as relays on part of PCB near
screws.
Attach rubber washers to screws when mount-
ing components that are affected by shock
(such as audio devices.)
Sealed construction by using packing, etc.
Use of simplified hermetically sealed type re-
lay, DIP relay
Coating
Gold-plating, rhodium-plating process
Remarks
Process
17