Product Details Portlet

Delay OFF Rocker Switch A8GS-T

Minimum size class in the industry Remote Reset Rocker Switch with Delay OFF Function

  • Rocker switch with Delay OFF Function. Switch is kept to turn ON, even if button is operated to turn OFF, and Switch is turned OFF by external signal.
  • Zero standby power with Reset function, switching OFF by external signal.
  • Preventing from application trouble such as a data lost or circuit damage by forced power OFF.
  • Timing control of main power switch turn OFF for safety application design with Delay OFF function.
  • Contact gap of 3 mm minimum.
  • UL and cUL standard approved, Conforming to EN standards.
RoHS Compliant
Model 2D/3D CAD ECAD(Download symbol,FootPrint,3DCAD)
* External site (Ultra Librarian) opens in a new window.
A8GS-T1115K Download Download
A8GS-T1185K Download Download
A8GS-T1215K Download Download
A8GS-T1285K Download Download
A8GS-T1315K Download Download
A8GS-T1385K Download Download
(*) Ultra Librarian uniquely created ECAD data based on the information provided by OMRON. Please note that OMRON does not guarantee the accuracy, concurrence or completeness of ECAD data.
Note: This web page provides an excerpt from a datasheet. Refer to Product Datasheet and other applicable documents for more information.
List of Models
Contact Form
1 to 4: Power contact terminal
a, b: Signal contact terminal
+, −: Coil terminal
Signal Contact Terminal: SPST + Power Contact Terminal: DPST Quantity per box
Signal Contact Terminal × 1 + Power Contact Terminal × 2
Terminals Signal Contact Terminal:
CT Connector
Power Contact Terminal:
Quick-connect terminals #187(t=0.8)
Signal Contact Terminal:
CT Connector
Power Contact Terminal:
Solder terminals
Marking on caps Marking on caps A8GS-T1185K A8GS-T1115K 50
A8GS-T1285K A8GS-T1215K
A8GS-T1385K A8GS-T1315K
Note: 1. This is not general 3 pole switch.
(1) Signal contact terminal is only for detecting button ON/OFF.
(2) Power contact terminal is for turning ON/OFF of circuit. Switch is turned OFF by external signal only, after turning OFF of button.

Contact Ratings
  Rated voltage Rated current (Resistive load)
Power Contact Terminal 125 VAC 16 A
250 VAC 10 A
Signal Contact Terminal 5 VDC 0.2 A
Note: 1. The above ratings were tested under the following conditions:
(1) Ambient temperature : 20±2°C
(2) Ambient humidity :65±5%
(3) Switching frequency :7times/min

Reset Coil Ratings
Rated voltage, current Operating voltage range Rated usage cycle Coil resistance
(Coil temperature : 20±2°C)
5VDC 455mA 4.5 to 5.5 VDC ON: 50 to 100 ms
OFF: Min 5 sec
Note: 1. Voltage for coil should be set within operating voltage range and applied time should be within rated usage cycle. Otherwise the performance of the coil may be deteriorated.
Note: 2. In case of applying voltage within the range from 5.5 to 24 VDC to the coil, contact your OMRON sales representative.

Contact specifications
  Signal contact Power contact
Material Gold alloy Silver alloy
Contact gap 3mm 3mm
Minimum applicable load (Reference value) * 3 VDC 1 mA 5 VDC 200 mA
* Please refer to "Using Micro loads" in "Precautions" for more information on the minimum applicable load.
Permissible operating frequency Mechanical Switch operation: 20 times/min max, Coil operation: 7 times/min max
Electrical 7 times/min max
Insulation resistance 100MΩmin
(at 500 VDC with insulation tester)
Contact resistance (initial value) Power contact terminal 100 mΩ max (6 VDC to 8 V, 1 A Voltage drop method)
Signal contact terminal 100 mΩ max (6 VDC to 8 V, 0.1 A Voltage drop method)
Dielectric strength Between terminals of the same polarity 2,000 VAC 50/60 Hz 1 min
Between terminals of the different polarity 2,000 VAC 50/60 Hz 1 min
Between each terminals of the switch and terminals of coil 4,000 VAC 50/60 Hz 1 min
Between each terminals of switch and ground 4,000 VAC 50/60 Hz 1 min
Vibration resistance * Malfunction 10 to 55 Hz 1.5 mm double amplitude (Malfunction 1 ms max)
Shock resistance * Malfunction 300m/s2 min (Malfunction 1 ms max)
Destruction 1000 m/s2 max
Ambient operating temperature −10 to +55 °C (with no icing or condensation, 60 % RH max)
Ambient operating humidity 90 % RH max (+5 to 35 °C with no icing or condensation)
Durability Mechanical Switch operation: 30,000 operations min, Coil operation: 10,000 operations min
Electrical Switch operation: 10,000 operations min, Coil operation: 10,000 operations min
Degree of protection IEC IP40
Contact release time ** 100 ms max
Weight A8GS-TxxxxK: Around 15 g
Note: 1. Above specification values are initial values.
* For the testing condition in individual specification, contact your OMRON sales representative.
** Time from voltage applied to reset coil to actual contacts opening.
(Unit: mm)
A8GS-T1□ 85K

Operating Characteristics
Operating force (OF) 1.8± 1.4N
Note: 1. Unless otherwise specified, a tolerance of ± 0.4 mm applies to all dimensions.
Note: 2. At initial operation or operation after reset, operating force is increased, due to switch structure.
Note: 3. Solder terminals model has different hole shape, comparing with Quick-connect terminals. Outline and characteristics are same.
Note: 4. No models of switch without delay off function (without coil), due to product design.

Panel Cutout
Panel thickness: 0.8 to 2.3 mm
Panel cutout design is for prevention of false insertion.
Please be careful about the direction of the protrusion.
The rollover of the panel shall be on the front face.
And panel back side shall be Edge shape by processing.
Note: 1. Recommendation panel material is "SPCC", however, in case of soft material or Panel back side shape is not edge, mounting strength may down. Please check and try by actual mounting panel and set the Panel thickness and hole dimension.


Do not wire the switch or touch any terminal of the Switch while power is being supplied. Or it may result in electric shock.


▪Use the switch within the rated voltage and current ranges, otherwise the switch may have deteriorated durability radiate heat, or burn out. This particularly applies to the instantaneous voltages and currents when switching.

Caution of usage


▪Easy to mount by snap fitting.
▪Do not impose excessive force on switch at the time of panel mounting.
▪Do not detach the switch after installed. Otherwise, the holding strength may be loose.
▪Apply the force to housing when installing to panel. Do not apply the force to the button (rocker) part when installing to the panel.


▪Confirm the size of the receptacles and be sure to connect them firmly.
▪Use an appropriate wire allowable to carry current.
▪Be sure that there is no mechanical stress on terminals and coil terminals. Otherwise, the switch may malfunction and/or damaged.
(Example: Too strong wiring)

▪Take appropriate insulation distance between switch terminal and other metal parts after wiring.
▪Coil has polarity, please confirm polarity when wiring.
▪Do not apply continuous voltage more than 10 seconds at any time. Otherwise, insulation deterioration may occur by heat of coil. Please consider the circuit design.
▪Reverse voltage may cause of accurate discrete semiconductor devices. In case of controlling by accurate discrete semiconductor devices, Please consider the circuit design. (Example : add the surge absorbing circuit)
▪In case of manual soldering, soldering time is max 4 sec by soldering iron (Max 350 °C at the iron tip) and do not add the stress to terminals.
▪In case of touching the soldering iron to the root of terminals, it may cause Housing parts melt.


▪Do not apply excessive operating force to the switch.
▪Do not drop or apply the excessive shock.
Otherwise the switch may be damaged or deformed.
▪Do not impose force to operating part from an angle, Otherwise the switch may be damaged or deformed.

Environment for storage and use

▪To prevent the terminals color change and others while storage, Do not keep for a long term in the following conditions.
(1) High temperature, high humid environment
(2) Corrosive gas
(3) The place where the direct rays of the sun
(4) The place where the sea breeze
(5) Environmental with a sudden temperature change This switch is not sealed to prevent from entering dust and liquid. Do not use under dust and liquid condition.
▪Switch shall not be icing or condensation.
▪Strong magnetic field may cause malfunction. Check function is recommended under practical use conditions.

Using Micro Loads

In case of using the switch under the micro loads, please refer the Minimum applicable load and set the load more than minimum applicable load.

Even when using micro load within the operating range, if inrush current occurs, it may increase contact wear and so deteriorate durability. Therefore, insert a contact protection circuit where necessary.

The minimum applicable load is the L-level reference value. This value indicates the malfunction reference level for the reliability level of 60 %. (λ 60)

The equation, λ 60 = 0.5 × 10-6 /operations indicates that the estimated malfunction rate is less than 1/2,000,000 operations with a reliability level of 60 %.

RoHS Compliant

The "RoHS Compliant" designation indicates that the listed models do not contain the six hazardous substances covered by the RoHS Directive.
Reference: The following standards are used to determine compliance for the six substances.
Lead : 1,000 ppm max.
Mercury : 1,000 ppm max.
Cadmium : 100 ppm max.
Hexavalent chromium : 1,000 ppm max.
PBB : 1,000 ppm max.
PBDE : 1,000 ppm max.