Connectors serve in a wide range of electrical and electronic systems, but not all connectors support the same type of connection. Two common configurations are wire-to-wire and wire-to-board.
The main difference is simple: wire-to-wire connectors connect two wires or cable assemblies, while wire-to-board connectors connect a wire or cable to a PCB. Understanding this difference can help engineers identify the right connector configuration for a specific application.
What Is a Wire-to-Wire Connector?
A wire-to-wire connector creates an electrical connection between two separate wires or cable assemblies.
Wire → Connector → Connector → Wire
This configuration does not require a PCB, making it useful when power or signals need to be transferred directly between cables.
Common applications include:
- Battery connections
- Power cables
- Portable equipment
- Industrial equipment
- Cable harnesses
Wire-to-wire connections can also provide greater flexibility when cables need to be connected, disconnected, or routed independently from a circuit board.
What Is a Wire-to-Board Connector?
A wire-to-board connector connects an external wire or cable to a printed circuit board (PCB).
Wire → Connector → PCB
This configuration is commonly used when power or signals need to enter or leave a PCB. One side of the connection is typically mounted to the board, while the other side accepts a wire or cable.
Typical applications include:
- Power supplies
- PCB power connections
- Control equipment
- Power distribution boards
- Industrial control systems
Wire-to-board connectors are particularly useful when a PCB is the central part of the electrical system.
Wire-to-Wire vs Wire-to-Board: Side-by-Side Comparison
| Feature | Wire-to-Wire | Wire-to-Board |
| Connection | Wire to Wire | Wire to PCB |
| PCB Required | No | Yes |
| Installation | Cable Assembly | Cable + PCB |
| Typical Use | Battery & Power Cables | PCB Power Connections |
| Flexibility | Higher | PCB-Dependent |
| Common Applications | Portable Equipment | Control Equipment |
The key difference is therefore not necessarily the connector’s size or electrical rating, but where the connection is made.
Where Are Their Common Applications?
Wire-to-Wire
Wire-to-wire connectors are a practical choice for directly connecting two cable assemblies.
They are often found in:
- Battery packs
- Power cables
- Portable equipment
- Industrial systems
Without a PCB connection, engineers can often position the cable assembly more freely within the equipment.
Wire-to-Board
Wire-to-board connectors are designed for systems where wiring must connect directly to a PCB.
They commonly serve in:
- Power supplies
- PCB power connections
- Control equipment
- Power distribution boards
This configuration can simplify the connection between external wiring and the electronic circuitry mounted on the PCB.
One Connector Family, Different Connection Configurations
Some modular connector systems can support both wire-to-wire and wire-to-board configurations by using different contacts, housings, and mounting options.
The Powerpole® 15-45 connector family is one example of a modular power connector system that can be configured for different power connection requirements. Depending on the selected configuration, the same connector family supports both cable-to-cable and PCB connections.
This flexibility benefits industrial equipment that requires different connection configurations within the same power system.
Frequently Asked Questions
1. What is the difference between wire-to-wire and wire-to-board connectors?
Wire-to-wire connectors connect two wires or cable assemblies directly, while wire-to-board connectors connect a wire or cable to a printed circuit board (PCB). The main difference lies in where the electrical connection occurs.
2. Do wire-to-wire connectors require a PCB?
No. Wire-to-wire connectors do not require a PCB. They connect two separate wires or cable assemblies and commonly serve in battery connections, power cables, and industrial equipment.
3. What are wire-to-board connectors used for?
Wire-to-board connectors connect external wires or cables directly to a PCB. Common applications include power supplies, control equipment, power distribution boards, and industrial control systems.
4. How do I choose between a wire-to-wire and wire-to-board connector?
Start by identifying where you need to make the connection. If you need to connect two wires or cable assemblies directly, choose a wire-to-wire connector. If a wire or cable needs to connect to a PCB, a wire-to-board connector is the better choice.
Conclusion
Wire-to-wire and wire-to-board connectors serve different connection requirements.
Wire-to-wire connectors connect cables or wires directly, making them suitable for battery packs, power cables, and portable or industrial equipment.
Wire-to-board connectors provide a connection between external wiring and a PCB, making them common in power supplies, control equipment, and PCB-based power distribution systems.
Choosing between the two starts with identifying the connection structure: wire to wire, or wire to PCB.
Find the Right Connector at LCSC
LCSC offers a wide selection of connectors for industrial equipment, power systems, control equipment, PCB assemblies, battery packs, and other electrical connection applications. Compare products by key specifications such as connector type, contact configuration, current rating, voltage rating, mounting method, contact material, and number of positions to find a suitable solution for your application. Explore our wire-to-wire and wire-to-board connector selection to compare available configurations, specifications, and product options.
