Solenoid Valve Connector Types How You Should Choose!


Solenoid connectors connect solenoid valves to a variety of other system components, including power supplies, control devices, sensors, and transducers. Its basic design is divided into three types: Type A, Type B and Type C according to DIN EN 175301-803. The construction of these three connector types is briefly described below, along with an overview of the circuit functions that work with the solenoid connector. By reading our review article, you will be able to learn more about solenoid valves.


Solenoid Connector Type

Solenoid valve connectors come in three basic types: Type A, Type B, and Type C. This section describes the general properties of each type. These connectors are governed by DIN standards:

DIN EN 175301-803 Form A

DIN EN 175301-803 Type B

DIN EN 175301-803 Form C

These standards were formerly known as DIN 43650 Form A, Form B or Form C. DIN standards ensure that users in various industries can be sure that products comply with a high level of integrity.


Solenoid Valve Connector with Circuit Function

A solenoid valve connector with proper circuit functionality plays a vital role in protecting the solenoid valve from damage caused by electrical surges. There are several circuit functions in solenoid valve connectors that play beneficial and vital roles. When considering the circuit function of a connector, note whether AC, DC, or both can be used.


Solenoid Valve Connector with LED

Solenoid connector with LED is a solenoid connector with integrated LED (Light Emitting Diode) indicator light. This connector adds LED indication function on the basis of the traditional connector, which can display the working status of the solenoid valve or other information through the change of light. LED colors and blinking patterns can be configured according to different application needs.

The main advantage of this connector is that it can provide a more intuitive working status display, which is convenient for the operator to understand the operation of the solenoid valve in a long-distance or dark environment. The color change and blinking pattern of the LED can communicate different information like on, off, fault etc.

It should be noted that the solenoid valve connector with LED still needs to follow the normal operation steps and precautions of the connector when installing and using it. The addition of LEDs will introduce electronic components, so when using them, make sure that the connector's protection level and environmental adaptability still meet the application requirements.


Pole Protection and Freewheeling Diodes

Freewheeling diode and pole protection circuit functions protect switching DC power supplies from transient voltage spikes. This circuit function eliminates arcing on the switch when the power is turned off. This is accomplished by freewheeling diodes to redirect the current through the coil, ensuring correct polarity.



A rectifier converts alternating current to direct current. DC solenoids are valued for their quieter operation, ability to operate from batteries, and lack of inrush current. Solenoid valve connectors typically use full wave rectifiers. This means that 90% of the AC voltage is converted to DC voltage.



The varistor protects the solenoid valve connector, its power supply, and the solenoid valve from power supply spikes. Since it protects the solenoid, which can be expensive to replace, it seems almost necessary to include that circuit function. It can operate using both AC and DC.


Solenoid Valve Connector Selection Criteria

Solenoid valve connectors have general attributes to choose from. However, properties may vary between different manufacturers.

Electrical Requirements: Different types of connectors have the following voltage and current characteristics, but these vary by manufacturer:

Type A: rated voltage up to 250V, rated current up to 16A

Type B: rated voltage up to 125V, rated current up to 10A

Type C: rated voltage up to 125V, rated current up to 6A

Environment: To determine the withstand capability of the connector in its operating environment:

Temperature: Generally, Type A, B, and C connectors have an operating temperature range of -40 °C (-40 °F) to 125 °C (257 °F). The range varies by manufacturer.

Humidity: Standard connectors are designed to operate in typical indoor environments. For extremely wet environments, choose connectors with better sealing and moisture resistance.

Ingress Protection Rating: The Ingress Protection Rating (IP Rating) determines how well a connector protects against solid particles such as dust or water. Common IP ratings for connectors are IP 65, IP 67 and IP 69K. These ratings vary by manufacturer.

Current: Whether a connector operates on AC, DC, or both depends on its circuit function (as described above). When looking for a connector, determine if it has a circuit function and how much current it can supply.

Size and Dimensions: When determining where a connector will fit in a system, consider the size of the connector. The dimensions of the different types of connectors are discussed above. Type A is the largest and Type C is the smallest.

Thread Type: Different connectors have different thread types for solenoid valve connector wiring:

Type A: PG 9, PG 11, M16, and NPT 1/2 in.

Type B: PG 9 and NPT 1/2 in.

Type C: PG 7


Which Type of Solenoid Valve Connector Should You Choose?

When choosing the basic type of solenoid valve connector to purchase (Type A, Type B, and Type C), there are several factors to consider, including your application needs, how you connect them, and the characteristics of your equipment. Here are some guidelines for selection:


Type A Solenoid Connector:

Applicable scenarios: Type A connectors are often used to connect solenoid valves to controllers, control panels, or other equipment.

Advantages: Type A connectors are more common and suitable for common connection needs. The design of the header pins can be customized for specific applications.

Considerations: If you need to connect a solenoid valve to a control system or panel, Type A connectors may be the more common choice.


Type B Solenoid Connector:

Applicable scenarios: B-type connectors are usually used in the solenoid valve itself to connect with piping systems or other equipment.

Advantages: The B-type connector can ensure the safety of the external connection of the solenoid valve and prevent misoperation.

Considerations: If you need to make a connection between the solenoid valve and the piping system, type B connectors may be better suited as they provide additional protection and robustness.


Type C Solenoid Connector:

Applicable scenarios: C-type connector is a combination connector, which is suitable for ensuring the correct correspondence between the plug and the socket, as well as the stability of the connection.

Pros: The Type-C connector ensures that the plug and receptacle are properly mated, avoiding the problem of plugging in the wrong pin.

Considerations: Type-C connectors can be a valuable option if you want to ensure proper mating when connecting, as well as prevent misconnection problems.

To sum up, the type of solenoid valve connector should be selected according to the specific application. You need to consider factors such as the type of equipment connected, environmental conditions, whether the degree of protection is required, the matching of plugs and sockets, and so on. Further consultation with the connector supplier or manufacturer is recommended prior to purchase to ensure you have selected the connector type that best suits your application needs.


Frequently Asked Questions


Q: What should I do if the solenoid valve connector does not work properly?

A: If the solenoid valve connector does not work properly, first check whether the power supply is normally supplied, and ensure that the connector plug is properly connected to the socket. Also check that the control signals are in place, you may need to use a test tool to confirm that the signal transmission is normal. If that still doesn't fix the problem, it may be time to check the solenoid valve itself for a fault.


Q: Why does the solenoid valve connector get hot?

A: The heating of the connector may be caused by overload, bad contact, improper wire material and other reasons. Overloading can cause excessive current flow, which may cause excessive heat generation in the connector. Poor contact will result in increased resistance, which will also generate heat. Make sure that the current and voltage are within the rated range of the connector, and the connection is good, which can reduce the heat problem of the connector.


Q: What should I do if the solenoid valve connector is oxidized or corroded?

A: Oxidation or corrosion of the connector will affect the electrical connection. It is recommended to cut off the power first, and then gently wipe the connector plug and socket with detergent and a soft cloth. If corrosion is severe, specialized cleaners or lubricants may be required. Regular maintenance can help prevent oxidation and corrosion problems.


Q: How to ensure the waterproof performance of the solenoid valve connector?

A: To ensure the waterproof performance of the connector, you should first choose a connector that meets the requirements of the protection level. During installation, make sure that the seal between the connector plug and the socket is good, and you can use a sealant or gasket to increase the waterproof effect. Regularly check the sealing performance of the connector to prevent the waterproof performance from being reduced due to damage or aging.


Q: What to do with the solenoid valve connector harness after it is tangled?

A: Tangling in the connector harness may result in damaged wires or loose connections. To avoid tangles in the wire harness, use wire guides, wire clips, and other securing devices to organize the wire harness. Make sure the connector wires have enough slack and don't overstretch them. If the wiring harness has been twisted, it needs to be unwound carefully to avoid damage to the connectors and wires.


Q: How to protect the solenoid valve connector when exposed to harsh environments?

A: When using connectors in harsh environments, you can choose connectors with high protection levels to prevent dust, moisture, etc. from entering the inside of the connector. In addition, external protective devices such as protective sleeves and protective covers can be used to reduce the impact of the external environment on the connector. Regular maintenance and cleaning are also important to prevent damage to connectors from environmental factors.


Q: How to replace the solenoid valve connector harness after it is damaged?

A: If the connector harness is damaged, the entire connector or harness usually needs to be replaced. After power failure, first remove the original connector harness, and then reinsert the new connector harness according to the connector type. Make sure the plug and socket are aligned correctly and the connection is secure. When replacing a connector harness, follow the manufacturer's installation guidelines.



When selecting a solenoid valve connector, we recommend that you consider the BRS brand of solenoid valve connectors. As an industry-leading manufacturer, BRS is focused on providing high-quality, highly reliable connectivity solutions to meet a variety of application needs. BRS solenoid valve connectors not only comply with international standards, but also have advanced circuit functions, protection performance, and precise matching of plugs and sockets. Whether your application is industrial automation, fluid control, or other areas, BRS's solenoid valve connectors can provide you with excellent performance and reliability. When choosing a connector, choosing BRS is your best choice to ensure stable system operation and equipment safety protection. Don't hesitate to choose BRS to bring a more efficient and smarter connection experience to your application. If you have any questions, welcome to contact us!

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