KH-PB-22E08 Self-Locking Push Button Switch: A Practical Choice for Compact Through-Hole Applications

In consumer electronics, industrial control modules, instrumentation, and other electronic applications, push button switches are among the most fundamental components for human-machine interaction. A reliable, compact self-locking push button switch provides stable state retention and control for electronic products. The KH-PB-22E08, launched by Kinghelm, is an 8 × 8 mm self-locking push button switch designed for general-purpose applications and featuring through-hole mounting. With its mature structural design and reliable electrical performance, it is well suited to a wide range of electronic designs that require the switch to maintain its on/off state.

Kinghelm KH-PB-22E08 Product Image

The most noticeable feature of the KH-PB-22E08 is its compact size. The switch base measures 8 mm × 8 mm, and the overall height is 17 mm, helping save valuable PCB space in devices with limited internal room. It features a through-hole, plug-in package with standard PC terminals. Its mature soldering process makes it suitable for automated wave soldering as well as manual soldering and debugging, making it convenient for both mass-production manufacturers and electronics DIY enthusiasts. The product is supplied in bags, with a gross weight of just 0.855 g per unit. Its lightweight design adds virtually no extra burden to mechanical assembly.

In terms of electrical configuration, this switch features six terminals and a double-pole, double-throw (DPDT) circuit structure. The six pins are arranged according to a standard PCB pad layout, with clearly defined schematic symbols and footprints. This configuration allows two independent circuits to be controlled simultaneously.

Unlike momentary tactile switches that return to their original position as soon as the button is released, the KH-PB-22E08 uses a self-locking mechanism: press once to latch the switch in the ON position, then press again to release it and return to the OFF position. This means users do not need to keep the button pressed to maintain the selected state. The switch is therefore suitable for power switching, operating mode selection, and function activation or deactivation.

The button features a rectangular plunger design with a blue-and-white color scheme, offering good visual recognition and a distinct tactile response. Its clear actuation feel provides users with positive feedback during operation.

Regarding materials and manufacturing processes, the switch components are selected to balance durability and electrical performance. The knob is made of blue POM (polyoxymethylene), a wear-resistant, dimensionally stable engineering plastic that helps resist cracking and surface whitening during repeated operation. The base housing is made of PBT with a copper strip structure and a nickel-plated surface, providing good insulation and mechanical strength.

The contact spring uses CS210R-EH copper material, while the contacts feature a silver composite plating layer. These materials provide good electrical conductivity and help maintain stable contact resistance, reducing oxidation-related issues and signal transmission losses. The internal spring is made of stainless steel wire, offering good fatigue resistance to help maintain consistent actuation performance over repeated operations.

The mechanical structure also distinguishes between the latching travel and the total travel. Critical dimensions and tolerances are strictly controlled to help maintain consistent tactile feedback across mass-produced units and minimize quality variations between individual switches.

From a product selection perspective, the KH-PB-22E08 is a non-illuminated, self-locking switch without an integrated LED indicator. Its simplified structure makes it suitable for applications that require mechanical latching but do not need illuminated status indication.

Typical applications include compact instrument control panels, small household appliance control boards, industrial control boxes, security alarm systems, test fixtures, chassis-mounted power switches, and peripheral function-switching modules.

Compared with surface-mount self-locking switches, its through-hole design provides stronger mechanical anchoring and better resistance to vibration. This can help reduce the risk of solder joint failures under vibration, making it a practical option for industrial equipment and automotive peripheral devices, subject to the requirements of the specific application.

Kinghelm KH-PB-22E08 Datasheet

As part of Kinghelm's push button switch product portfolio, the KH-PB-22E08 is supported by standardized mechanical drawings and specifications. PCB footprints, pin assignments, travel parameters, and bill-of-materials information are standardized, allowing engineers to refer to the datasheet when designing schematics and PCBs and reducing preliminary component verification efforts.

The 8 × 8 × 17H mm form factor is widely used in the industry, offering good compatibility with established supply chains and making alternative component selection more convenient.

However, several limitations should be considered during component selection. First, this is a self-locking switch and should not be used as a substitute for a momentary, self-resetting tactile switch. Second, it does not include an indicator light; applications requiring illuminated status indication should use a suitable illuminated self-locking switch instead. Finally, the through-hole package occupies space on the underside of the PCB, so sufficient clearance must be reserved for the pins and solder joints, particularly in high-density board designs.

Overall, the KH-PB-22E08 is a well-balanced, general-purpose, six-terminal self-locking push button switch. Its compact 8 × 8 mm base, DPDT circuit configuration, reliable latching mechanism, durable materials, and mature through-hole mounting design make it suitable for both ease of mass production and long-term operational reliability.

For electronic R&D engineers and hardware solution providers, the KH-PB-22E08 is a practical and cost-effective component choice when a compact push button switch is needed to provide latching control for two signal circuits.

About Kinghelm

Kinghelm (www.kinghelm.net) specializes in a wide range of connector and switch products, including headphone jacks, DC power jacks, FPC connectors, USB connectors, waterproof USB connectors, detection switches, vertical detection switches, through-hole detection switches, surface-mount coding switches, limit switches, rotary coding switches, tactile push buttons, Type-C receptacles, Type-C interfaces, joystick switches, five-way switches, rotary wheel switches, and surface-mount detection switches.

Key models in Kinghelm's KH series include KH-6X6X6H-STM, KH-IPEX-K501-29, KH-6X6X5H-STM, KH-6X6X5H-Z2J, KH-3216-H0209, KH-VH-PT3.96, and KH-SMA-P-8029.

These products complement the electronic components offered by Slkor (www.slkoric.com), including sensors, TVS diodes, power devices, clock chips, and other semiconductor products. Together, the two companies provide a comprehensive product portfolio and professional technical support to tens of thousands of customers worldwide.

KH-PB-22E08View Product Details