G9KJ-1A DC12

## **G9KJ** 

## **PCB Power Relays** 

## **1,500 VDC Precharge Power Relay** 

- Compact relay optimized for precharge for use in 1,500 VDC systems (L 37.2 x W 17.0 x H 25.5 mm) 

- Applicable to precharge circuits with making current up to 25 A 

- Min. 14 mm of clearance and Min. 25 mm of creepage (between coil and contacts) 

- High sensitivity of 530 mW coil consumption 

**Refer to the** _**Precautions**_ **on page 4.** 

## **Model Number Legend** 

## **G9KJ-** @@@ 

**1 2 3** 

## **Application Examples** 

   - Energy Storage System 

   - V2X (V2H, V2B, etc.) 

   - EV Charger 

**1. Number of Poles 2. Contact Form 3. Enclosure rating** 1: 1-pole A: SPST-NO (a) None: Flux protection 

## **Ordering Information** 

|**Contact type**|**Enclosure rating**|**Terminal Shape**|**Model**|**Rated coil voltage**<br>**(V)**|**Minimum packing**<br>**unit**|
|---|---|---|---|---|---|
|SPST-NO(1a)|Flux protection|PCB terminals|**G9KJ-1A**|12, 24 VDC|40 pcs/box|



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

Example: G9KJ-1A DC12 

Rated coil voltage 

However, the notation of the coil voltage on the product case as well as on the packing will be marked as  VDC. 

## **Ratings** 

## **Coil** 

|**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|44.1|272|75% max.|5% min.|110%|Approx. 530|
|24 VDC|22.1|1,087|||||



**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. 

## **Contacts** 

|**Contacts**||
|---|---|
|**Contact type**|Single|
|**Contact material**|Ag alloy (Cd free)|
|**Rated load (resistive)**|1,500 VDC making 25 A, carrying 5 A, breaking 0 A<br>40 VDC  5A|
|**Rated carry current**|5 A|
|**Max. switching voltage (making/breaking)**|Making 1,500 VDC, breaking 40 VDC|
|**Max. switching current(making/breaking)**|Making25 A, breaking5 A|



**1** 

**G9KJ** 

## **Characteristics** 

|**Item**<br>**Model**|**Item**<br>**Model**|**G9KJ-1A**|
|---|---|---|
|**Contact resistance*1**||100 mΩ max.|
|**Operate time**||15 ms max.|
|**Release time**||5 ms max.|
|**Insulation resistance*2**||1,000 MΩ min.|
|**Dielectric**<br>**strength**|**Between coil and**<br>**contacts**|6,000 V|
||**Between contacts of the**<br>**same polarity**|2,000 V|
|**Impulse withstand voltage (Between coil**<br>**and contacts)**||13 kV|
|**Vibration**<br>**resistance**|**Destruction**|10 to 55 to 10 Hz, 0.75 mm single amplitude (1.5 mm double amplitude)|
||**Malfunction**|10 to 55 to 10 Hz, 0.75 mm single amplitude (1.5 mm double amplitude)|
|**Shock**<br>**resistance**|**Destruction**|1,000 m/s2|
||**Malfunction**|100 m/s2|
|**Durability**|**Mechanical**|500,000 operations min. (at 18,000 operations/h)|
||**Electrical (Resistive)**|1,500 VDC making 25 A, carrying 5 A, breaking 0 A, 120,000 operations<br>40 VDC, 5 A, 6,000 operations<br>(Switching frequency: 1 second ON - 9 seconds OFF)|
|**Use**<br>**conditions**|**Ambient operating**<br>**temperature**|-40°C to +85°C (with no icing or condensation)|
||**Ambient operating**<br>**humidity**|5% to 85% RH|
|**Weight**||Approx. 16 g|



*1. Measurement conditions: with 5 VDC, 1 A, voltage drop method. 

*2. Measurement conditions: measured at the same point as the withstand voltage with a 1,000 VDC insulation resistance tester. 

## **Engineering Data** 

## **●Carry Current vs Energizing Time** 

**==> picture [174 x 143] intentionally omitted <==**

**----- Start of picture text -----**<br>
1,000<br>85°C 0.5sq<br>100<br>10<br>1 10 100<br>Carrying current value (A)<br>s<br>Energizing time (    )<br>**----- End of picture text -----**<br>


**2** 

**G9KJ** 

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

**(Unit: mm)** 

## **G9KJ-1A** 

~~37.2 MAX. 17 MAX.~~ 25.5 MAX. 0.65 ~~Tad E~~ 3.85 ~~JEU LT~~ 0.4 0.4 0.4 1 1 **PCB Mounting Holes Terminal Arrangement/** (BOTTOM VIEW) **Internal Connections** Dimensional tolerance is ±0.1 mm. (BOTTOM VIEW) 2-1 dia. ~~28~~ 2-1.3 dia. 1 2 7.5 4 3 ~~hoo~~ 4.7 2.9 ~~31.5~~ 

=: CAD Data 

## **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 (CSA) Recognized** Wks **(File No.E549211)** 

|**Model**<br>**Coil ratings**|||**Contact ratings**|**Number of test**<br>**operations**|
|---|---|---|---|---|
|**G9KJ-1A**<br>12 VDC, 24 VDC<br>~~=~~|Making 25 A, carrying 5 A, breaking 0 A, 1500 VDC (Resistive) 85°C<br>40 VDC 5 A(Resistive)85°C|||120,000<br>6,000|
|**TÜV Certified for EN/IEC Standards**<br>**(Certification No.R 50690600)**<br>**Model**<br>**Coil ratings**<br>**Contact ratings**<br>**Number of test**<br>**operations**<br>**G9KJ-1A**<br>12 VDC, 24 VDC<br>Making 25 A, carrying 5 A, breaking 0 A, 1500 VDC (Resistive) 85°C<br>120,000<br>40 VDC 5 A(Resistive)85°C<br>6,000<br>~~re~~|||||
|**CQC Certified**<br>**(Certification No.CQC25002483924)**|||||
|**Model**<br>**Coil ratings**|||**Contact ratings**|**Number of test**<br>**operations**|
|**G9KJ-1A**<br>12 VDC, 24 VDC|Making 25 A, carrying 5 A, breaking 0 A, 1500 VDC (Resistive) 85°C<br>40 VDC 5 A(Resistive)85°C|||120,000<br>6,000|
||||||
|**Insulation data**|||||
|**Creepage distance**<br>**- between coil and contact**||25 mm min.|||
|**Clearance**<br>**- between coil and contact**||14 mm min.|||
|**Type of insulation**<br>**- between coil and contact**||Basic 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**||1,500V (DC only)|||
|**Overvoltage category**<br>**Altitude up to 2,000 m**<br>**Altitude up to 4,000 m**<br>~~Po~~<br>~~Po~~||III<br>II|||
|**Other data**|||||
|**Category of protection (IEC61810-1)**||RTII|||
|**Flammability class (UL94)**||V-0|||
|**Coil insulation system (UL1446)**||Class B|||



**3** omRON ~~a~~ 

## **G9KJ** 

## **Precautions** 

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

## **Warning** 

Since this relay is intended for inrush current protection circuits, breaking load that exceeds the rated range may cause abnormal heat generation, smoking, or ignition. Use with Max. load of 40 VDC and 5 A for breaking. 

As this relay is a high-voltage 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. 

## **Precautions for Safe Use** 

##  **Drop** 

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

## **Precautions for Correct Use** 

##  **Handling** 

- This product is flux protection type. Therefore, do not perform immersible cleaning. 

##  **Relay Service Life** 

- Do not use these relays outside of the specified ratings and service life, or for any application other than high DC voltages. Implement safety circuits and other measures to minimize the risk in case of the unlikely event of a failure. 

- The electrical durability of these relays is specified as the number of load switching operations under a resistive load and OMRONspecified standard testing conditions. 

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. 

**4** 

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

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

## **Regional Contact** 

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

**Cat. No. K361-E1-01** 1025 (1025)