G9KD-1A DC24

## **G9KD** 

## **PCB Power Relays** 

## **High-Capacity Power Relay Capable of Switching up to 1,500 VDC, 150 A*** 

- 150 A breaking up to a maximum of 1,000 VDC 

- Max. switching voltage 1,500 VDC, 

- rated carry/max. breaking current 150 A (at 70°C)/100 A (at 85°C) 

- Capable of 12 kV high withstand voltage (between coil and contact) 

- Contact gap: 6.0 mm minimum 

- Low initial contact resistance ≤4 m Ω 

- Auxiliary contact option conformed to mirror contact structure defined in IEC/EN60947-4-1 

**Refer to the** _**Precautions**_ **on page 6.** 

## **Model Number Legend** 

## **G9KD-** @@@ 

**1 2 3** 

## **Application Examples** 

   - Energy Storage System 

   - V2X (V2H, V2B, etc.) 

   - EV Charging Station 

**1. Number of Poles 2. Main Contact Form 3. Auxiliary Contact Form** 1: 1-pole A: SPST-NO (1a) 1B: SPST-NC (1b) None: No Auxiliary contact 

## **Ordering Information** 

|**Type**|**Contact form**|**Enclosure rating**|**Terminal Shape**|**Model**|**Rated coil**<br>**voltage (V)**|**Minimum**<br>**packing unit**|
|---|---|---|---|---|---|---|
|Standard|SPST-NO (1a)|Flux protection|PCB terminals|G9KD-1A|12 VDC<br>24 VDC|36pcs/box|
||SPST-NO + SPST-NC (1a1b)|||G9KD-1A1B|||



**Note:** When ordering, add the rated coil voltage to the model number. 

Example: G9KD-1A DC12 

Rated coil voltage 

Both the coil voltage on the product case and the packing will be marked as  VDC. 

## **Ratings** 

##  **Coil** 

|**Item**<br>**Rated voltage (V)**|**Rated current**<br>**(mA)**|**Coil resistance**<br>**(Ω)**|**Must operate**<br>**voltage (V)**|**Must release**<br>**voltage (V)**|**Max. voltage (V)**|**Power**<br>**consumption (mW)**|
|---|---|---|---|---|---|---|
||||**% of rated voltage**||||
|12 VDC|Approx. 417|28.8|75% max. *1|5% min.|110%|Approx. 5,000<br>Approx. 613 *1|
|24 VDC|Approx. 208|115|||||



**Note: 1.** The rated current and resistance are measured at a coil temperature of 23°C with a tolerance of ±10%. 

- **Note: 2.** The operation characteristic are measured at a coil temperature of 23°C. 

**Note: 3.** The maximum permissible voltage is the maximum value of the fluctuation range of the relay coil operating power supply and was measured at an ambient temperature of 23°C. 

- **Note: 4.** Be sure to use this relay at holding voltage. 

- *1. Coil consumption when holding voltage is used is approximately 613 mW (at 35% holding voltage). For details, please refer to _Coil Voltage Reduction (Holding Voltage) after Relay Operation_ on page 6. 

**1** 

**G9KD** 

##  **Contacts** 

|**Item**||**G9KD-1A**|**G9KD-1A1B**|
|---|---|---|---|
|**Contact type**|**Main contact**|Double break||
||**Auxiliary contact**|―|Single|
|**Contact material**|**Main contact**|Ag Alloy (Cd free)||
||**Auxiliary contact**|―|Ag + Au plating|
|**Rated load**<br>**(resistive load)**|**Main contact**|1,000 VDC 50 A/1,000 VDC 100 A/1,500 VDC 40 A (at 85°C)<br>1,000 VDC 150 A (breaking only) (at 70°C)||
||**Auxiliary contact**|―|30 VDC 1 A|
|**Rated carry current**|**Main contact**|100 A (at 85°C)/150 A (at 70°C)||
||**Auxiliary contact**|―|1A|
|**Max. switching**<br>**voltage**|**Main contact**|1,500 VDC||
||**Auxiliary contact**|―|30 VDC|
|**Max. switching**<br>**current**|**Main contact**|150 A||
||**Auxiliary contact**|―|1A|



## **Characteristics** 

|**Item**|**Item**|**G9KD-1A, G9KD-1A1B**|
|---|---|---|
|**Contact resistance *1**||Main contact:<br>4 mΩmax. (refer to Engineering Data on page 3)<br>Auxiliary contact:100 mΩmax.|
|**Operate time *2**||50 ms max.|
|**Release time *2**||30 ms max.|
|**Insulation resistance *3**||1,000 MΩmin.|
|**Dielectric strength**|**Between coil and**<br>**contacts**|Main contact:<br>5,500 VAC, 50/60 Hz for 1 min<br>Auxiliary contact: 2,000 VAC, 50/60 Hz for 1 min|
||**Between contacts**<br>**of the same**<br>**polarity**|Main contact:<br>2,000 VAC, 50/60 Hz for 1 min<br>Auxiliary contact: 1,000 VAC, 50/60 Hz for 1 min|
||**Between contacts**<br>**of different polarity**|Between main contact and auxiliary contact: 5,500 VAC, 50/60 Hz for 1 min|
|**Impulse withstand**<br>**voltage**|**Between coil and**<br>**contacts**|Main contact:<br>12 kV (1.2 × 50μs)<br>Auxiliary contact: 2.5 kV (1.2 × 50μs)|
|**Vibration**<br>**resistance**|**Destruction**|10 to 55 to 10 Hz, 0.5 mm single amplitude (1.0 mm double amplitude)|
||**Malfunction**|10 to 55 to 10 Hz, 0.15 mm single amplitude (0.3 mm double amplitude)|
|**Shock resistance**|**Destruction**|735 m/s2|
||**Malfunction**|25 m/s2|
|**Durability**|**Mechanical**|G9KD-1A:<br>500,000 operations min. (at 10,800 operations/h)<br>G9KD-1A1B: 100,000 operations min. (at 10,800 operations/h)|
||**Electrical**<br>**(Resistive)**|Main contact:<br>1,000 VDC 50 A at 85°C; 6,000 operations<br>1,000VDC100 Aat 85°C;20 operations<br>1,500 VDC 40 A at 85°C; 1 operation<br>1,000 VDC 150 A at 70°C (breaking only); 1 operation<br>Auxiliary contact: 30 VDC 1 A at 85°C; 100,000 operations<br>(Switching frequency: 1 second ON - 9 seconds OFF)|
|**Failure rate (M level) (Reference value) *4**||Main contact:<br>24 VDC 100 mA<br>Auxiliary contact: 5 VDC 10 mA|
|**Use conditions**|**Coil holding**<br>**voltage *5**|35% to 50% of rated coil voltage|
||**Ambient operating**<br>**temperature**|-40°C to +85°C (with no icing or condensation)|
||**Ambient operating**<br>**humidity**|5% to 85%|
|**Weight**||Approx. 265 g|



**Note:** The values given above are initial values at 23°C. (Except Electrical Durability) 

- *1. Measurement conditions: Main contact 40 A at 5 VDC (after 3 minutes) using the voltage drop method. Auxiliary contact 1 A at 5 VDC using the voltage drop method. 

- *2. Measurement conditions: Applied rated coil voltage, no contact bouncing. 

- *3. Measurement conditions: Measured with a 1,000 VDC megohmmeter for main contact or a 500 VDC megohmmeter for auxiliary contact at the same point as the dielectric strength was measured. 

- *4. The value was measured at a switching frequency of 180 operations/ minute. 

- *5. For the detail regarding holding voltage usage, please refer to  _Coil Voltage Reduction (Holding Voltage) after Relay Operation_ on page 6. 

**2** 

**G9KD** 

**Engineering Data** 

##  **Contact resistance** 

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18<br>16<br>14<br>12<br>10<br>8<br>6<br>4<br>2<br>0<br>0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0<br>Contact resistance (mΩ)<br>Frequency of contact<br>**----- End of picture text -----**<br>


##  **Shock Malfunction G9KD-1A** 

## **G9KD-1A1B** 

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Z- De- Z- De-<br>800 energized 800 energized<br>600 Energized 600 Energized<br>Y+ 400 X+ Y+ 400 X+<br>200 200<br>0 0<br>X- Y- X- Y-<br>Z+ Z+<br>**----- End of picture text -----**<br>


Measurement :Measure the value of contact malfunction happening by applying 3 axes with 6 directions 3 times each. The energized voltage is within the range of the rated holding voltage. 

Standard value:Excitation 25 m/s[2] 

## **Shock direction** 

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Z-<br>Y+ X+<br>X-<br>Y-<br>Z+ Contact terminal<br>Coil terminal<br>**----- End of picture text -----**<br>


**3** 

**G9KD Dimensions** 

> CAD Data marked products, 2D drawings and 3D CAD models are available. For CAD information, please visit our website, which is noted on the last page. 

**(Unit: mm)** 

## **G9KD-1A** 

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43.5 MAX. 60.5 MAX.<br>Terminal Arrangement/<br>(43)* (60)* Internal Connections<br>(BOTTOM VIEW)<br>1 2<br>56.5 MAX.<br>(56)*<br>4 3<br>6-4<br>4-1.5<br>hed El<br>PCB Mounting Holes<br>(BOTTOM VIEW)<br>Dimensional tolerance is ±0.1 mm.<br>(2.4)* 21.9 2-1 21.9 2-3.5<br>2-9.1<br>2-8 2-2.5<br>eo el<br>28.8 24.2<br>28.8 24.2<br>T a a 8-0.5 dia. | =e<br>4-0.5 2-3 aa 8-0.5 dia.<br>or * Average value CAD Data<br>**----- End of picture text -----**<br>


**G9KD-1A1B** 

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43.5 MAX. 60.5 MAX.<br>Terminal Arrangement/<br>(43)* (60)* Internal Connections<br>(BOTTOM VIEW)<br>1 2<br>6<br>56.5 MAX.<br>(56)*<br>5<br>4 3<br>6-4<br>4-1.5<br>PCB Mounting Holes<br>(BOTTOM VIEW)<br>Dimensional tolerance is ±0.1 mm.<br>(2.4)* 21.9 4-1 21.9 2-3.5<br>2-9.1<br>2-8 4-2.5<br>28.8 24.2 14.6<br>28.8 24.2 14.6<br>16-0.5 dia.<br>4-0.5 2-3 i 8-0.5 dia. e<br>* Average value<br>**----- End of picture text -----**<br>


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Ga CAD Data<br>**----- End of picture text -----**<br>


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**G9KD** 

## **Approval Standard** 

## The approval rating values for overseas standards are different from the performance values determined individually confirm the values before use. **UL/C-UL Certificated: (File No.E41515)** 

|**Model**|**Contact form**|**Coil ratings**|**Contact ratings**|**Number of test operations**|
|---|---|---|---|---|
|**G9KD-1A**<br>**G9KD-1A1B**|SPST-NO(1a)|12 VDC, 24 VDC *|1,000 VDC 50 A (Resistive) at 85°C|6,000|
||||1,000 VDC100 A (Resistive) at 85°C|20|
||||1,000 VDC 150 A (Resistive) at 70°C (breaking only)|1|
||||1,500 VDC 40 A (Resistive) at 85°C|1|
||SPST-NC(1b)|12 VDC, 24 VDC *|30 VDC 1 A(Resistive)at 85°C|100,000|



* Holding voltage of 35% (after applying rated voltage to coil for 0.1 seconds) 

**EN/IEC, TÜV Certificated: (Certificate No.R 50699445)** 

|**Model**|**Contact form**|**Coil ratings**|**Contact ratings**|**Number of test operations**|
|---|---|---|---|---|
|**G9KD-1A**<br>**G9KD-1A1B**|SPST-NO(1a)|12 VDC, 24 VDC *|1,000 VDC 50 A (Resistive) at 85°C|6,000|
||||1,000 VDC 100 A (Resistive) at 85°C|20|
||||1,000 VDC 150 A (Resistive) at 70°C (breaking only)|1|
||||1,500 VDC 40 A (Resistive) at 85°C|1|
||SPST-NC(1b)|12 VDC, 24 VDC *|30 VDC 1 A(Resistive)at 85°C|100,000|



* Holding voltage of 35% (after applying rated voltage to coil for 0.1 seconds) 

**CQC Certificated: (Certificate No.CQC25002490047)** 

|**Model**|**Contact form**|**Coil ratings**|**Contact ratings**|**Number of test operations**|
|---|---|---|---|---|
|**G9KD-1A**<br>**G9KD-1A1B**|SPST-NO(1a)|12 VDC, 24 VDC *|1,000 VDC 50 A (Resistive) at 85°C|6,000|
||||1,000 VDC 100 A (Resistive) at 85°C|20|
||||1,000 VDC 150 A (Resistive) at 70°C (breaking only)|1|
||||1,500 VDC 40 A (Resistive) at 85°C|1|
||SPST-NC(1b)|12 VDC, 24 VDC *|30 VDC 1 A (Resistive) at 85°C|100,000|



* Holding voltage of 35% (after applying rated voltage to coil for 0.1 seconds) 

|Insulation data|Insulation data|Insulation data||
|---|---|---|---|
|Creepage distance|||25 mm min.|
||- between coil and main contact|||
||- between main contact and auxiliary contact||25 mm min.|
|Clearance|||14 mm min.|
||- between coil and main contact|||
||- between main contact and auxiliary contact||14 mm min.|
|Type of insulation|||Basic insulation|
||- between coil and main contact|||
||- between main contact and auxiliary contact||Basic insulation|
||- between coil and auxiliary contact||Functional insulation|
|Type of interruption|||Micro disconnection|
|Conditions of insulation data||||
|Material group of insulation|||IIIa|
|Pollution degree (external environment of the relay)|||3|
|Rated insulation voltage||Main contact|1,500 V (DC only)|
|||Auxiliary contact|30 V|
|Overvoltage category||Altitude up to 2,000 m|III|
|Other data||||
|Category of protection (IEC61810-1)|||RTII|
|Flammability class (UL94)|||V-0|
|Coil insulation system (UL1446)|||Class F|



**5** 

## **G9KD** 

## **Precautions** 

## **Please refer to "Safety Precautions for All PCB Relays" for correct use.** 

## **Warning** 

As this relay is a high-voltage and high-current type, there is a risk of abnormal heat generation, smoke generation or fire if you use the relay with a contact voltage, current, or for a number of times beyond the specified range. Use only within the specified ranges. 

##  **Coil Voltage Reduction (Holding Voltage) after Relay Operation** 

- Use this relay with coil voltage reduction. 

- Apply the rated voltage for 0.1 to 3 seconds to the coil first. 

- The range of coil rated voltage must be set as 100 to 110%, and holding voltage must be 35 to 50%. Do not exceed the ranges due to the change of coil voltage change and so on. 

If the power is switched on when the connections are insufficient, there is a risk of abnormal heat generation. Do not connect and use clips and sockets on individual relays. 

If the power is switched on when the connections are insufficient, there is a risk of abnormal heat generation. Please install and use relays under recommended conditions. 

## Precautions for Safe Use 

##  **Drop** 

- Do not use relays that have been dropped as they may not function properly. 

## Precautions for Correct Use 

##  **Mounting Direction** 

- The relay is limited for mounting direction due to the 

- specification of operation voltage and electrical durability. Do not use in any other direction except as indicated in below chart. There is a risk of reduced operational lifetime for failure to observe this warning. 

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Main contact terminal Coil terminal<br>(a) (c)<br>Upper side<br>ll —_— |<br>Coil terminal<br>(b) tf Main contact terminal (d) t<br>a<br>(e)<br>**----- End of picture text -----**<br>


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100 to 110%<br>(Rated voltage)<br>35 to 50%<br>(Holding voltage)<br>0.1 to 3 seconds<br>Applied coil  Coil resistance  * Coil power<br>voltage consumption<br>Rated<br>100 to 110% Approx. 5 to 6 W<br>voltage 28.8 Ω (12 VDC)<br>Holding  35 to 50% 115 Ω (24 VDC) Approx. 0.6 to 1.3 W<br>voltage<br>**----- End of picture text -----**<br>


- The coil resistances were measured at a coil temperature of 23°C with tolerances of ± 10%. 

##  **Diode Connection for Operating Coil** 

- Connect diode and zener diode to the coil (refer to the picture below). 

- Diode is for coil surge absorption. Ensure to include zener diode as there is a possibility of any influence for switching capability when only using diodes. 

- Coil has no polarity. Connect the diodes in the reverse polarity of the voltage applied to the coil. 

- The recommended zener diode voltage is 3 times that of the rated coil voltage. 

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Diode<br>Relay coil<br>Zenner diode<br>**----- End of picture text -----**<br>


##  **PCB Terminal Soldering** 

- Perform soldering under the following conditions. 

- Preheat at 120°C for 60 seconds and dip in solder bath at 290°C for up to 20 seconds. 

- It is not possible to wash relay as this is not fully sealed type. 

##  **Assembly** 

- To reduce the risk of specification deterioration, assemble relays in a dust free, low humidity and non-corrosive gas environment. 

- Using the relay under high temperature, high humidity, or harmful gas may deteriorate its performance characteristics due to condensation or corrosive materials, resulting in failure or burn damage to the relay. 

##  **Relay Service Life** 

- These relays must be used for high DC voltages. The final failure mode is failure to break the circuit. In a worst-case 

- This product weight is about 265 g. Be careful of the strength of PCB. To reduce soldering crack due to heat stress, use both sides through hole PCB. scenario, burning may extend to surrounding components. Do not use these relays outside of the specified ratings and 

**6** 

**G9KD** 

service life, or for any application other than high DC voltages. Implement safety circuits and other safety measures to minimize the risk in case of the unlikely event of a failure. 

- In a low-humidity or low-temperature (negative) environment, the life cycle may vary as a result of high voltage and largecurrent opening and closing. Therefore, be sure to check on the actual machine. 

- The coil drive circuit, ambient environment, switching frequency, or load conditions (e.g., inductive load or capacitor load) may reduce the service life and possibly lead to failure to break. Always confirm the service life in the actual equipment. 

##  **Micro load** 

- This is a power relay for high power switching. Do not use for micro loads such as signal switching. 

##  **Mounting interval** 

- A mounting interval of 30 mm minimum is recommended for this relay. This is based on OMRON’s evaluation results and serves as a guideline for ensuring stable product operation. In environments where sufficient cooling is ensured (e.g., by fans), more flexible placement may be possible. Additionally, mutual magnetic interference may cause changes in the relay’s characteristics. In actual design, be sure to verify performance using the actual equipment before use. 

##  **The Effects of Magnetic Fields from Permanent Magnets** 

- This product contains permanent magnets, which may generate magnetic fields that can interfere with nearby electronic components or sensors. When designing, pay close attention to the distance and placement relative to magnetically sensitive components (e.g., current sensors, magnetic sensors etc.). 

Due to the effects of magnetic fields varying depending on the operating environment and characteristics of surrounding components, ensure to perform thorough evaluations beforehand. 

##  **Field wiring connections** 

- For field wiring connections, select the cross-sectional area according to the load current. 

As a standard, use cables, wires, or busbars at least the size of the cross-sectional areas shown in the following table. Insufficient it may cause burning due to abnormal heating of the wire. 

|**Max Current**<br>**[A]**|**AWG**<br>**Size**|**Cross-sectional area**<br>**[mm2]**|
|---|---|---|
|32|10|5.3|
|50|8|8.4|
|65|6|13.3|
|85|4|21.2|
|115|2|33.6|
|130|1|42.4|
|150|1/0|53.5|



**7** 

Please check each region's Terms & Conditions by region website. 

## **OMRON Corporation Device & Module Solutions Company** 

## **Regional Contact** 

**Americas Europe** https://components.omron.com/us https://components.omron.com/eu **Asia-Pacific China** https://components.omron.com/ap https://components.omron.com.cn **Korea Japan** https://components.omron.com/kr https://components.omron.com/jp 

© OMRON Corporation 2025  All Rights Reserved. In the interest of product improvement, specifications are subject to change without notice. 

**Cat. No. K360-E1-01** 1225 (1225)