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Types of JST Connectors

JST connectors, known for their reliability and versatility, are used in a wide range of electrical applications. They play a crucial role in bridging electrical connections and transmitting signals across various devices. Given their widespread use, it is important to understand the different types of JST connectors, especially when working on specific projects or requiring replacements.

JST connectors come in various families, each designed for specific applications and characterized by their pitch, which is the distance from the center of one contact to the center of the next. Here are some of the most commonly used JST connector families:

JST XH Series

Pitch: 2.5 mm

Applications: The XH series is widely used in connecting rechargeable battery packs, especially in consumer electronics. This series is favored for its compact size and reliability, making it suitable for small electronic devices like remote-controlled cars, drones, and various DIY electronics projects.

Specifications: The XH series connectors typically handle moderate current and voltage, suitable for most small-scale applications.

JST SH Series

Pitch: 1.0 mm

Applications: The SH series connectors are badly compact, making them ideal for applications where space is limited. These connectors are often found in miniaturized electronics, such as micro drones, wearable devices, and other compact gadgets.

Specifications: Due to their small size, SH connectors handle lower currents and are designed for precise, low-power applications.

JST PH Series

Pitch: 2.0 mm

Applications: The PH series connectors are commonly used in battery connections for small electronics and in various internal wiring applications within devices. Their moderate size makes them a good balance between the space-saving SH series and the slightly larger XH series.

Specifications: PH connectors are designed to handle moderate currents, suitable for internal connections in devices like cameras, portable audio players, and other handheld electronics.

JST EH Series

Pitch: 2.5 mm

Applications: Similar to the XH series, the EH series connectors are used in applications where a reliable connection is needed in a relatively compact form. They are often found in electronic control units, circuit boards, and various consumer electronics.

Specifications: The EH series is built to handle moderate to high current and voltage levels, providing a robust connection for medium-sized electronic assemblies.

JST RCY Series

Pitch: 2.5 mm

Applications: The RCY series is particularly popular in radio-controlled (RC) applications, including RC cars, planes, and boats. They are designed to provide secure and reliable connections in environments where vibrations and physical stresses are common.

Specifications: RCY connectors are built to handle higher currents and are known for their durability in demanding conditions.

JST GH Series

Pitch: 1.25 mm

Applications: The GH series connectors are used in applications requiring high pin density in a small footprint. They are suitable for drones, robotics, and other compact electronic assemblies where space and weight are critical factors.

Specifications: GH connectors are designed for moderate current and voltage levels, providing a reliable connection in tight spaces.

Choosing the Right JST Connector

When selecting a JST connector for your project, several factors need to be considered:

Pitch: Ensure the pitch matches the requirements of your application. Mismatched pitches can lead to connectivity issues and may not fit the intended space.

Current and Voltage Ratings: Choose a connector that can handle the electrical demands of your project. Exceeding the current or voltage ratings can result in overheating or failure.

Wire Size: Ensure the connector is compatible with the wire gauge you are using. Using incorrect wire sizes can lead to poor connections and potential safety hazards.

Environmental Conditions: Consider the operating environment. Some connectors are designed to withstand vibrations, moisture, or bad temperatures, which might be necessary for your application.