JST connectors are among the most widely used electrical connectors in electronics manufacturing. These compact, high-quality connectors ensure reliable wire-to-board connections, making them essential for circuit boards, power supply systems, and consumer electronics. They are known for their durability, precision, and ability to handle various voltage and current requirements.
With a wide range of JST connection types available, selecting the right one is critical for ensuring electrical efficiency, signal integrity, and long-term reliability. The wrong choice could lead to poor connections, signal loss, or device failure. Engineers, product managers, and procurement teams need to understand the differences between JST plug types to choose the best option for their application.
In this guide, we’ll explain 10 common JST connectors, their key features, applications, and how they compare. Whether you’re working on PCB assemblies, power distribution, or signal transmission, this breakdown will help you find the most suitable cable connection type for your needs.
1. JST ZH Connector
What Is It?
The JST ZH series is a wire-to-board connector designed for compact electronic applications requiring a low-profile connection.
Key Features
- Pin Spacing: 1.5mm
- Current Rating: Up to 1A per contact
- Attributes: Compact, reliable, and designed for high-density PCB layouts
Common Applications
ZH connectors are commonly used in PCB connectors for industrial control systems, consumer electronics, and medical devices where space-saving and durability are key.
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What Is It?
The EH series is a lightweight, small-pitch JST plug type designed for low-power signal transmission in compact electronic systems. It offers a reliable connection while maintaining a small footprint, making it suitable for space-constrained designs.
Key Features
- Pin Spacing: 2.5mm
- Current Rating: 3A per contact
- Attributes: Friction-lock mechanism, secure contact design, easy mating and unmating
Common Applications
EH connectors are widely used in electrical connectors for LED lighting, home appliances, and automotive electronics. Their secure locking mechanism ensures stable connections in applications requiring frequent plugging and unplugging, preventing accidental disconnections.
3. JST SM Connector
What Is It?
The JST SM series is a widely used crimp connector known for its strong locking mechanism and durability in high-vibration environments. It is a wire-to-wire connector, making it ideal for applications where secure cable connections are required.
Key Features
- Pin Spacing: 2.5mm
- Current Rating: 3A per contact
- Attributes: Snap-lock design, polarised housing to prevent misalignment, robust plastic casing
Common Applications
SM connectors are commonly used in battery packs, drones, LED strips, and RC vehicles. Their secure locking system prevents accidental disconnections, making them ideal for portable and high-movement applications where a stable electrical connection is critical.
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What Is It?
The JST PH series is a compact, low-profile JST connection type designed for wire-to-board applications requiring a reliable yet space-saving solution. It offers a balance of durability and electrical efficiency, making it ideal for low-power circuits.
Key Features
- Pin Spacing: 2.0mm
- Current Rating: 2A per contact
- Attributes: Secure retention force, friction-lock mechanism, lightweight design
Common Applications
PH connectors are widely used in PCB connectors for small electronic devices, robotics, and embedded systems. Their compact design makes them ideal for applications with limited space, such as IoT devices, wearables, and industrial automation equipment. Their secure mating structure ensures reliable power and signal transmission even in environments with moderate vibrations.
5. JST PA/XA Connector
What Is It?
The JST PA and XA series are durable wire-to-board connectors designed for high-reliability applications. They feature a secure locking mechanism, ensuring strong retention in industrial and automotive environments.
Key Features
- Pin Spacing: 2.0mm (PA) / 2.5mm (XA)
- Current Rating: 3A per contact
- Attributes: Positive locking system, high retention force, robust housing
Common Applications
PA and XA connectors are commonly used in power distribution circuits, control panels, and automotive electronics. Their secure lock prevents accidental disconnections, making them ideal for applications exposed to movement, vibration, or frequent maintenance.
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What Is It?
The JST RCY series is a wire-to-wire crimp connector designed for high-current applications. It features a polarised housing that ensures proper alignment and a snap-lock mechanism for secure connections.
Key Features
- Pin Spacing: Varies depending on the configuration
- Current Rating: 3A+ per contact
- Attributes: Secure snap-lock, durable plastic housing, easy crimp termination
Common Applications
RCY connectors are widely used in RC vehicles, drones, battery packs, and power distribution systems. Their strong locking mechanism prevents accidental disconnections, making them reliable for applications where vibrations or movement are common.
7. JST GH Connector
What Is It?
The JST GH series is a precision JST plug type designed for microelectronics and sensor applications requiring accurate data transmission.
Key Features
- Pin Spacing: 1.25mm
- Current Rating: 1A per contact
- Attributes: Secure latch, compact footprint
Common Applications
GH connectors are ideal for drones, cameras, and industrial automation systems that need compact yet reliable cable connection types.
8. JST VH Connector
What Is It?
VH connectors are high-power JST connection types designed for applications requiring robust current-handling capacity.
Key Features
- Pin Spacing: 3.96mm
- Current Rating: 10A per contact
- Attributes: High-retention force, strong housing
Common Applications
VH connectors are widely used in power supply units, industrial machinery, and high-power battery applications where reliable connections are essential.
9. JST SHD Connector
What Is It?
SHD connectors offer high-density wire-to-board connector solutions with enhanced durability for rugged applications.
Key Features
- Pin Spacing: 1.0mm
- Current Rating: 1A per contact
- Attributes: Compact, vibration-resistant design
Common Applications
Common in medical devices, automotive electronics, and miniaturised industrial equipment, SHD connectors provide stable, secure electrical connections in compact spaces.
10. JST XH Connector
What Is It?
XH connectors are one of the most versatile JST plug types and are used in a wide range of electronic systems.
Key Features
- Pin Spacing: 2.5mm
- Current Rating: 3A per contact
- Attributes: Secure friction-lock, high durability
Common Applications
XH connectors are frequently found in consumer electronics, power distribution circuits, and PCB connectors, offering reliable connections for power and signal transmission.
Selecting the right JST connection type is essential for ensuring electrical connectors meet the requirements of different applications. Factors like pin spacing, current rating, and locking mechanisms are important aspects in performance, durability, and compatibility.
For compact and low-power designs, options like ZH, PH, or GH connectors work well, while high-current applications benefit from VH or RCY connectors. Engineers and procurement teams should evaluate their specific needs to choose the most suitable wire-to-board connector for their projects.
If you’re sourcing JST plug types for your next project, explore Altimex’s range of high-quality cable connection types. Contact our team for expert guidance on finding the best solution for your application.
