AJH250E High Voltage DC Contactor
AJH250E
High Voltage DC Contactor

Features

1、Sealed with high-strength epoxy resin, no risk of arc leakage, ensuring no fire or explosion within the service life.

2、Potting with mainly nitrogen inert gas improves arc extinguishing performance and effectively prevents contact oxidation and burnout. The contact resistance is low and stable, and the contact part can meet the IP67 protection grade.

3、250A 85ºC long time current carrying capacity.

4、The insulation resistance reaches 100MΩ (1,000VDC), and the withstand voltage between the contact and the coil is 3.5kV. 

5、Compliant with IEC 60664-1, GB/T14048.1 and GB/T14048.4 requirements.

6、Comply with RoHs (2015/863/EU), REACH (1907/2006/EC), ANSI/UL 60947-4-1-2014 requirements.

7、Safety certificate: CE, CCC, RoHS.

Application Areas

30A-600A, 12-1500VDC, the main contact form has one set of normally open, two sets of normally open, one set of normally closed and two sets of normally closed, can be with auxiliary contacts, IP67 waterproof grade, small heat, low power consumption, high life. Used in new energy vehicles, DC charging pile, charger, PDU high voltage control box, ESS energy storage, battery pack field;

Product Certification

· Complies with RoHs (2002/95/EC);

Main Contact Specification

Contact Arrangement

1K(1NO)

Contact Polarity

Non-polarity

Contact Resistance

≤0.5mΩ(at 250A)

Max. Switching Voltage

1000VDC

Max. Breaking Current

2000A (320VDC) 1次(Ops)

Electrical Endurance (Resistive Load)

3,000次(Ops) (1,000VDC, 250A)

5,000次(Ops) (750VDC, 250A)

8,000次(Ops) (750VDC, 250A)

Mechanical Endurance

300,000次(Ops)

Withstand Current

250A, Continuous

400A, 60min

500A, 5min

1500A, 1s

Temperature Rise

Main Contact Temperature Rise≤55K(70mm²,250A Continuous)



Performance Parameter(at23℃)

Pickup Voltage

See Coil Parameter Tables

Dropout Voltage

See Coil Parameter Tables

Pickup Time

≤30ms

Contact Bounce Period

≤5ms

Dropout Time

≤10ms

Dielectric Strength

Between Main Contacts

10,000VDC 1min

Between Main Contact and Coil

3500VDC 1min

Insulation Resistance

Initial State

100MΩ 1min

After Electrical Life

50MΩ 1min

Shock

Stability

20g (Power On)

Strength

50g

Vibration

10g, 10~500Hz, 1/2 Sine Wave (Power On)

Relative Humidity

5%~95%RH

Temperature

-40℃~85℃

Load Terminal

M8 External Thread

Weight

约About 480g

Dimension

80x65.5x72.5mm



Auxiliary Contact Parameter

Aux. Contact Arrangement

FK/FB/FZ (1NO/1NC/1CO)

Aux. Contact Rated Current

5A

Aux. Contact Max. Breaking Voltage

120VDC


AJH250E Coil Parameter

Coil Voltage

Pickup Voltage VDC

Dropout Voltage VDC

Coil Resistance

Starting Power

Holding Power

9-36V

9-36V

5-7V

3.3Ω±10%

25W±10%

3.0W±10%



Model Coding

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Outline Installation Dimension Drawing

Without Auxiliary Switch

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With Auxiliary Switch

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Wiring Diagram

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Product Packaging Specifications

Product

Model

Packaging

Min. QTY of

Inner Packaging

Carton Size

(LxWxH cm)

Net Weight/PCS

(Max.) g

Total QTY

(pcs)

Net Weight

(Max.) kg

Gross Weight

(Max.) kg 

AJH250E

Pearl Cotton+Carton

10 PCS/Layer53.5x23x20

490

209.810.6

Note:

1、Multiple typical packaging specifications for each product category are only listed as examples for reference.

2、The actual weight of the packaging may fluctuate with environmental temperature and humidity. For specific batch weights, please contact your dedicated sales representative.



Usage Cautions

1、Regarding the application of this product, please select the matching product according to your specific use conditions and environmental requirements when selecting the product. If the requirements are not clearly specified, please contact AOKAI to obtain more technical support.

2、When installing and using this product, regardless of wiring or fixed installation, it is required to use anti-loose spring washers

3、The torque for installing fasteners should be within the standard range required by this specification. It may cause the unstable installation or damaging the product if the torque is lower than the minimum torque or higher than the maximum torque.

4、Do not install the contactor in places with strong magnetic fields (such as transformers or strong magnets), or close to objects with thermal radiation. It is recommended to use it with a cooling fan.

5、It is forbidden to use the product in an environment with oil pollution, especially before wiring, it will seriously affect the main terminals conductivity if they are polluted by oil pollution, and affect the product life.

6、It is forbidden to use the product beyond the rated electrical life. When the rated electrical life is reached, although the product can continue to work, there is a risk of failure, explosion, and burning because of non-breaking.

7、When the main circuit voltage is ≥48V, if the H suffix appears on the product label, it means that the main circuit wiring has the current direction, and the "+" terminal or the terminal with red paint must be connected to the positive pole of the power supply (battery).

8、This product cannot be used as a protector, and the circuit must be connected with a protector in series when using.

9、AOKAI only does the resistive electrical life verification and quality assurance. When the product is used in an environment with inductive load or capacitive load, it is recommended that the circuit should be connected in parallel with a surge protection device.

10、After continuous work, restart immediately after disconnection, the pickup voltage will be affected due to the heating state of the product, and it is reasonable that the pickup voltage will increase.

11、It is strictly prohibited to wiring when power on

12、In principle, please do not use the contactor when it has dropped (height≥30cm).

13、AOKAI reserves the right to change the product. Customers should confirm the content of this specification before the first order, and can ask our company to provide a new specification if necessary.

If you would like to learn more Contactor relevant information.
Aokai Electric's technical team always welcomes inquiries.