KH-A42002-2X7A Wire-to-Board Connector: 4.2mm Pitch and 2×7P Pin Design

In electronic equipment, industrial control systems, power systems, and various wiring applications, wire-to-board connectors provide electrical connections between wires and PCBs. For applications requiring relatively high current capacity, high withstand voltage, and reliable mechanical connections, connector pitch, pin count, electrical specifications, and material properties all need to be considered comprehensively.

The KH-A42002-2X7A from Kinghelm is a wire-to-board connector featuring a 2×7P pin configuration, 4.2mm pitch, and through-hole mounting. With a rated current of up to 7A, it can be used for a variety of wire-to-PCB connection applications.

Kinghelm KH-A42002-2X7A Product Image

1. Features of the KH-A42002-2X7A

The KH-A42002-2X7A features a through-hole design with pins arranged in two rows, providing a total of 14 positions, or 2×7P. The connector has a 4.2mm pitch. Compared with connectors featuring smaller pitches, the larger spacing between adjacent pins provides more installation and wiring space while supporting multiple power or signal connections.

The connector is rated for 7A AC/DC and 600V AC/DC, making it suitable for certain power connection and industrial electronic applications. The housing/wafer is made of PA66 with a UL94V-2 flame-retardant rating, while the pins are made of brass with tin plating. This construction provides suitable electrical conductivity while also supporting soldering and connection reliability.

In terms of mounting, the KH-A42002-2X7A adopts a through-hole mounting structure and can be directly installed on a PCB. It can be used with a compatible wire-side connector to form a complete wire-to-board connection solution. The connector features a transparent housing, providing a simple appearance and making it convenient to visually identify the connector structure during assembly.

2. Main Electrical and Material Specifications

According to the product specifications, the main parameters of the KH-A42002-2X7A are as follows:

• Model: KH-A42002-2X7A
• Brand: Kinghelm
• Type: Wire-to-board connector
• Configuration: 2×7P pin header
• Number of Positions: 14 Pin
• Pitch: 4.2mm
• Mounting Method: Through-hole / THT
• Rated Current: 7A AC/DC
• Rated Voltage: 600V AC/DC
• Operating Temperature: -25°C to +85°C
• Contact Resistance: ≤20mΩ
• Insulation Resistance: ≥1000MΩ
• Withstand Voltage: 1500V AC/minute
• Wafer Material: PA66
• Flammability Rating: UL94V-2
• Pin Material: Brass
• Pin Finish: Tin-plated
• Packaging: Bag

These specifications provide basic reference information for connector selection. In actual applications, the PCB layout, operating environment, wire specifications, and mating connector structure should also be considered.

3. Why Is Matching Connector Pitch and Pin Count Important?

When selecting a wire-to-board connector, pitch and pin count are two important structural parameters.

Connector pitch generally refers to the center-to-center distance between adjacent pins. For example, the KH-A42002-2X7A has a 4.2mm pitch, meaning that the center distance between adjacent positions is 4.2mm. Pitch not only affects the physical dimensions of the connector but also directly affects PCB pad layout and available wiring space.

Pin count determines the number of independent electrical connection points provided by the connector. The KH-A42002-2X7A uses a 2×7P configuration, consisting of two rows with seven pins per row, for a total of 14 pins. For equipment requiring multiple power, control, or signal connections, a multi-position connector can help integrate several circuits into a single connector interface and simplify wiring.

Therefore, when selecting a wire-to-board connector, both the required number of pins and the distance between adjacent pins should be confirmed.

For example, if the PCB is designed for a 4.2mm pitch, the selected connector should have a corresponding 4.2mm pitch. If the circuit requires 14 connection points, a 2×7P configuration can be considered, provided that the other mechanical dimensions and electrical requirements are also compatible.

It is important to note that the same pin count does not necessarily mean that two connectors are directly interchangeable. Even if two connectors are both 14-pin products, differences in pitch, row spacing, pin arrangement, mounting direction, or mating connector design may prevent them from being properly assembled.

Therefore, connector selection should generally consider pitch + row configuration + pin count + connector structure together.

4. What Applications Are Suitable for a 4.2mm-Pitch Connector?

A 4.2mm pitch is a commonly used medium-size connector pitch and can provide a balance between installation space, electrical spacing, and connection requirements.

Similar wire-to-board connectors may be used in industrial control equipment, power control boards, LED lighting equipment, household appliances, automation equipment, and certain motor control systems.

For applications involving multiple power or control circuits, the 2×7P, 14-pin configuration of the KH-A42002-2X7A can provide multiple connection points within a relatively compact PCB area.

For current-carrying applications, the rated current and actual operating current should be carefully considered. Although the KH-A42002-2X7A has a rated current of 7A, the connector rating should not be considered in isolation. Wire gauge, PCB copper trace width, temperature rise, ambient conditions, and continuous operating time should also be taken into account during product design.

Kinghelm KH-A42002-2X7A Datasheet

5. What Else Should Be Considered During Connector Selection?

In addition to pitch and pin count, wire-to-board connector selection should also take into account the mounting method, mating connector, operating temperature, voltage rating, and current rating.

The KH-A42002-2X7A uses a through-hole mounting structure and is suitable for corresponding PCB through-hole assembly processes. If the PCB is designed for surface-mount technology (SMT), it is necessary to confirm whether the connector structure is compatible with the intended manufacturing process.

The mating connector should also be verified to ensure that the pin header and wire-side connector are properly matched in terms of mechanical dimensions and electrical configuration.

In terms of electrical performance, the KH-A42002-2X7A features a 600V AC/DC rated voltage, 1500V AC/minute withstand voltage, and ≥1000MΩ insulation resistance, which can serve as reference specifications for connector selection in relevant equipment designs.

The specified operating temperature range is -25°C to +85°C. If the actual application environment exceeds this range, a connector specifically designed for the required temperature conditions should be selected.

6. Conclusion

Overall, the Kinghelm KH-A42002-2X7A features a 4.2mm pitch and 2×7P dual-row, 14-pin configuration, providing multiple connection points while maintaining relatively generous pin spacing. With a rated current of 7A, it can be used in a variety of wire-to-PCB connection applications.

During the connector selection process, it is important to verify the pitch, pin count, row configuration, mounting method, mating structure, and electrical specifications. Ensuring that the connector is properly matched with the PCB and wire-side connector can help improve assembly efficiency and connection reliability.

About Kinghelm

Kinghelm (www.kinghelm.net) specializes in the design, manufacturing, sales, and technical services of wireless signal transmission and reception products, electronic signal connectors, and interconnection system products.

Under the “kinghelm” brand, the company offers a wide range of products, including Type-C connectors, SMA connectors, IPEX connectors, MCX connectors, HDMI connectors, automotive wiring harnesses, adapter cables, pin headers, terminals, RF cables, antennas, GPS antennas, RF coaxial connectors, WiFi antennas, BeiDou antennas, embedded antennas, 4G antennas, ceramic antennas, RF connectors, electronic components, sensors, millimeter-wave products, headphone jacks, DC jacks, FPC connectors, USB connectors, waterproof USB connectors, tactile switches, Type-A receptacles, Type-C interfaces, and other related products.

These products are continuously supplied to customers through both online and offline sales channels.

KH-A42002-2X7AView Product Details