DIP & SIP Switches

DIP and SIP switches are small, manually operated electronic switches designed to be mounted directly onto a printed circuit board (PCB). A DIP switch, short for dual in line switch, packages multiple individual switches into a single housing with two parallel rows of terminals, allowing engineers to control the flow of electricity around a circuit board through simple on-off settings. A SIP switch (single in-line package) is a compact, single-row variant of the DIP switch, offering similar configuration functionality in a narrower footprint suited to space-constrained board layouts. These switches provide a convenient, permanent means of configuring hardware behaviour without the need for software, retaining their settings even when power is removed.

RS Hong Kong offers an extensive range of DIP and SIP switches across through-hole and surface mount formats, with varying numbers of positions, actuator styles, and contact ratings to suit virtually any PCB configuration requirement.

Types of DIP Switches

DIP switches are available in several formats, differentiated by their mounting method, actuator style, and switching action, with the right type determined by the assembly process and the configuration requirements of the application.

Through-Hole DIP Switches

The through hole DIP switch is the traditional mounting format, with terminal leads inserted through holes in the PCB and soldered on the reverse side to provide a strong mechanical and electrical connection. This robust construction makes through-hole switches well suited to prototyping, low-volume production, and applications subject to vibration or mechanical stress. Their compatibility with manual soldering and breadboard testing also makes them a popular choice in development and educational settings.

Surface Mount DIP Switches

The surface mount DIP switch is designed for surface-mount technology (SMT) assembly, with terminals soldered directly onto pads on the board surface rather than through drilled holes. This format is optimised for automated pick-and-place assembly and high-volume production, and supports the compact, high-density board designs found in modern electronics. Many SMT variants are supplied in tape-and-reel packaging and feature sealed housings to withstand reflow soldering and automated cleaning processes.

Piano-Type DIP Switches

Piano-type DIP switches feature raised, individually hinged actuators that resemble piano keys, making them easy to operate by hand without the need for a tool. The larger actuator surface provides clear tactile and visual feedback on switch state, reducing the risk of configuration errors during manual setup. This style is commonly chosen where settings need to be adjusted frequently or by operators in the field.

Rotary DIP Switches

Rotary DIP switches use a dial-style actuator that selects between multiple positions, typically providing hexadecimal or decimal addressing within a single compact component. By rotating the dial to a numbered position, users can quickly assign device addresses or select operating modes without setting multiple individual switches. This makes rotary types particularly useful for node addressing in networked and multi-device installations.

Standard Flat DIP Switches

Standard flat DIP switches are low-profile devices with recessed or flush slide actuators, offering a basic, space-efficient solution for general-purpose PCB configuration. The low profile helps protect against accidental switching and suits enclosed assemblies where board height is constrained. These switches are typically adjusted with a small tool such as a screwdriver or stylus, making them well suited to set-and-forget configuration tasks.

SIP Switches

A SIP switch packages its contacts in a single in-line row rather than the two parallel rows of a dual in-line switch, producing a slimmer component that conserves valuable board space. SIP switches are suited to designers working with compact or high-density PCB layouts who still require manual, hardware-level configuration. They are commonly used in the same addressing and mode-selection roles as DIP switches where a narrower footprint is needed.

Common Applications of DIP Switches

DIP switches are used across a wide range of electronic and industrial systems throughout Hong Kong wherever simple, reliable hardware configuration is required.

Electronics and Embedded Systems

In Hong Kong's electronics design and embedded systems sector, DIP switches are widely used for address selection, feature configuration, and setting operating parameters directly on the circuit board. Engineers rely on through hole DIP switch and surface mount DIP switch formats during both prototyping and production to define hardware behaviour without committing settings to firmware. This hardware-level configurability is valued for its simplicity, reliability, and ability to retain settings without power.

Industrial Control and Automation

DIP switches are commonly found in Hong Kong's industrial control and automation equipment, where they are used to set device IDs, configure operating modes, and define communication parameters in PLC modules and fieldbus devices. Setting a unique address via a dual in-line switch or rotary DIP switch allows multiple devices to coexist on a shared network or bus without conflict. Their robustness and resistance to electrical noise make them well suited to demanding factory and process environments.

Telecommunications Equipment

In telecommunications hardware deployed across Hong Kong, DIP switches serve as configuration controls within network routers, switches, and signalling equipment. They allow technicians to set hardware options such as line termination, addressing, and operating modes during installation and commissioning. The ability to verify and adjust configuration physically, without specialist software, simplifies field servicing and reduces setup time.

Buy DIP and SIP Switches from RS Hong Kong

RS Hong Kong is a trusted DIP switch supplier stocking an extensive range of DIP and SIP switches from leading manufacturers including TE Connectivity, Nidec Components, Omron and our very own RS PRO. We carry through-hole and surface mount formats across a wide selection of switch positions, actuator styles, and contact ratings.

DIP switch price varies by switch type, number of positions, and mounting format, and RS Hong Kong offers options across a broad range to suit both prototyping requirements and high-volume production runs.

As a one-stop procurement source, RS also carries complementary products including rotary switches, pushwheel switches as well as limit switches for complete switching solutions in a single order. Browse the full range and buy DIP switches online at RS today. For more information on our delivery fees and delivery options across Hong Kong, visit our delivery information page.