G2R-1-SND-DC12(S) Omron, G2R-1-SND-DC12(S) Datasheet - Page 22

• Manufacturer Part Number: G2R-1-SND-DC12(S)
• Description: RELAY SPDT 12VDC PLUG-IN W/LED
• Manufacturer: Omron
• Series: G2RSr

Specifications of G2R-1-SND-DC12(S)

• Relay Type: General Purpose
• Contact Form: SPDT (1 Form C)
• Contact Rating (current): 10A
• Switching Voltage: 440VAC, 125VDC - Max
• Coil Type: Standard
• Coil Current: 43.2mA
• Coil Voltage: 12VDC
• Turn On Voltage (max): 8.4 VDC
• Turn Off Voltage (min): 1.8 VDC
• Mounting Type: Socket
• Termination Style: Quick Connect - .187" (4.7mm)
• Circuit: SPDT (1 Form C)
• Contact Rating @ Voltage: 10A @ 250VAC
• Control On Voltage (max): 8.4 VDC
• Control Off Voltage (min): 1.8 VDC
• Coil Voltage Vdc Nom: 12V
• Contact Current Max: 10A
• Contact Voltage Ac Nom: 250V
• Contact Voltage Dc Nom: 30V
• Coil Resistance: 278ohm
• Contact Configuration: SPDT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: G2R-1-SNDDC12(S); G2R-1-SNDDC12(S); G2R1SNDDC12S; Z2952

Notes on Correct Use
■ Driving by Transistor
When a transistor is used to drive the relay, be sure to ground the emitter of the transistor.
When the transistor is used in emitter-follower configuration (i.e., the collector is grounded), give adequate consideration to the voltage across the
collector and emitter. The required voltage must be applied to the relay.
NPN transistor
Advice on selecting a transistor for driving the relay
1. From the relay catalog or data sheet, ascertain the following coil
2. Determine the lower- and upper-limit values of the pickup voltage
3. By determining the component for suppressing surge, obtain the dielectric strength of the transistor for driving the relay.
4. Determine collector current l
5. Select the transistor that satisfies the conditions determined in
6. After selecting the transistor, observe the l
22
characteristics:
Rated voltage ________ VDC
Rated current ________ mA
Coil resistance _______ Ω
from the rated voltage.
Lower-limit pickup voltage _____V
Upper-limit pickup voltage _____V
(If surge is contained in the rated voltage, obtain the maximum
value including the surge.)
In the case of diode
(Upper-limit of pickup voltage + 0.6) x 2* ≅ V
In the case of diode and zener diode
(Upper-limit of pickup voltage + 0.6 + breakdown voltage**) x 2* ≅ V
In the case of varistor
(Upper-limit pickup voltage + varistor voltage***) x 2* ≅ V
In the case of RC
(Upper-limit pickup voltage + surge voltage****) x 2* ≅ V
l
steps 3 and 4.
of the transistor indicated in its ratings.
The characteristic curve illustrates the relation between collector
current l
From this graph, obtain collector-emitter voltage V
l
l
by the driver stage.
Thus, Collector-emitter voltage V
Use the transistor in its switching (saturation) area. An adequate
base current is required.
C
C
B
= Upper-limit pickup voltage/Coil resistance x 2*
= Maximum value of must operate voltage/Coil resistance
= Base current of the switching transistor which is determined
C
and collector-emitter voltage V
Electromechanical Relays
C
.
CE
= V
C
CE
vs. V
CEO
at base current l
Technical Information
≅ V
CE
CE
characteristics
CBO
where,
= ___V
CEO
CEO
≅ V
≅ V
CBO
CBO
B
.
= ___V
CEO
= ___V
≅ V
PNP transistor
Note:
* This safety factor must be determined by the user.
** The breakdown voltage differs depending on the compo-
*** The varistor voltage differs depending on the component. In
****The surge voltage differs depending on the type and rating
CBO
nent. If multiple zener diodes are to be used, use their max-
imum breakdown voltage.
addition, the varistor voltage of a single varistor may vary
depending on the current. Consult the manufacturer of the
varistor to be used to determine the varistor voltage.
of the relay, and the constants of C and R of the circuit in
which the relay is used. Positively determine the surge volt-
age by experiment.
= ___V