9-Position SMD Rotary Switch | TM-1901AS

The TM-1901AS 9-Position SMD Rotary Switch is a high-performance surface mount rotary switch engineered for applications that require precise position selection,reliable operation,and efficient PCB integration.Designed with a compact footprint and robust mechanical construction,this 9-position rotary switch provides accurate function selection while supporting high-volume automated manufacturing processes.

Whether used in smart home products,medical equipment,industrial control systems,or portable electronic devices,the TM-1901AS delivers exceptional durability,stable electrical performance,and a premium tactile user experience.

As electronic devices become smaller and more intelligent,designers require compact input solutions that provide both reliability and precise control.The TM-1901AS addresses these needs through a durable SMD rotary selector switch design featuring nine fixed positions with 40°rotational increments.

Unlike conventional push-button interfaces that may require multiple keys for navigation,this multi-position rotary switch allows users to quickly select functions,operating modes,channels,or settings using a single control component.

The switch features gold-plated internal contacts that ensure stable conductivity and low contact resistance,helping maintain signal integrity in sensitive electronic applications.Its surface-mount construction also supports automated pick-and-place assembly,making it an excellent choice for modern PCB manufacturing.

With an operating life of up to 50,000 cycles and a wide temperature range from-40°C to+85°C,the TM-1901AS is built to perform reliably in demanding environments.

Key Features

9 Fixed Positions

The switch offers nine clearly defined positions with 40-degree detents between each step,allowing accurate and repeatable selection.

Compact SMD Design

The SMD rotary switch structure minimizes PCB space requirements while supporting automated assembly and reflow soldering processes.

Absolute Position Selection

Unlike incremental input devices,this rotary selector switch provides direct position output,eliminating the need for software counting or recalibration.

Crisp Tactile Feedback

An integrated detent mechanism creates a clear tactile response at each position,enhancing user confidence and operational accuracy.

Long Mechanical Life

Designed for up to 50,000 operating cycles,the TM-1901AS delivers dependable performance over extended periods of use.

Stable Electrical Performance

Gold-plated contacts help maintain low contact resistance and reliable signal transmission throughout the product lifecycle.

How the TM-1901AS Works

The TM-1901AS operates using a mechanical contact system that connects a common terminal to one of nine output positions.

When the actuator shaft is rotated:

1. An internal conductive wiper moves across a set of stationary contacts.

2. Each detent position aligns the wiper with a specific contact.

3. The selected contact completes an electrical circuit.

4. The system immediately identifies the selected function,mode,or channel.

Because each position corresponds to a unique output,the switch provides direct and reliable position indication without requiring complex software interpretation.

This operating principle makes the 9-position SMD rotary switch particularly suitable for applications where quick and accurate mode selection is essential.

Advantages of the TM-1901AS

Space-Saving Integration

The compact surface mount rotary switch design helps engineers maximize PCB space without sacrificing functionality.

Simplified User Interface

A single switch can replace multiple buttons,reducing interface complexity while improving usability.

Reliable Signal Switching

Gold-plated contacts provide consistent electrical performance and minimize signal degradation.

Easy Manufacturing

The SMD package supports automated assembly processes,reducing production costs and improving manufacturing efficiency.

Enhanced User Experience

Distinct tactile feedback ensures users can feel each position change,reducing operating errors.

Reduced Maintenance Requirements

The durable mechanical design supports long-term operation with minimal maintenance.

Applications

The TM-1901AS electronic rotary switch is suitable for a wide range of industries and products.

Smart Home Systems

Used in smart thermostats,lighting controllers,and home automation panels for menu navigation and function selection.

Portable Electronic Equipment

Ideal for handheld recorders,communication devices,testing instruments,and measurement equipment.

Medical Devices

Suitable for infusion pumps,patient monitoring systems,and diagnostic equipment requiring reliable parameter selection.

Industrial Control Panels

Allows operators to switch operating modes,machine functions,or system configurations quickly and accurately.

Consumer Electronics

Frequently integrated into audio equipment,multimedia systems,and compact electronic control interfaces.

Embedded Systems

Provides a reliable human-machine interface solution for IoT devices and microcontroller-based products.

Why Choose the TM-1901AS?

The TM-1901AS combines the reliability of a traditional mechanical rotary switch with the manufacturing advantages of modern surface-mount technology.Its compact design,long service life,precise position control,and excellent tactile feedback make it an ideal solution for engineers seeking a dependable PCB mount rotary switch.

Whether you're designing industrial equipment,smart home products,medical electronics,or portable devices,the TM-1901AS offers the performance,durability,and flexibility required for today's advanced electronic systems.

KKG Electronics, each part of the use of temperature-resistant materials, high-temperature testing equipment 260 ℃ for 5 minutes, the appearance of the product does not change!   

We ensure high production efficiency and ship your order within 7 days after payment.

What is a 9-position SMD rotary switch?

A 9-position SMD rotary switch is a surface-mount mechanical switch that allows users to select one of nine discrete positions,with each position corresponding to a specific electrical output.

What are the advantages of a surface mount rotary switch?

Surface mount switches support automated PCB assembly,reduce manufacturing costs,save board space,and improve production efficiency.

Does the TM-1901AS provide absolute position output?

Yes.Each position corresponds to a unique electrical connection,providing direct position identification without software counting or recalibration.

What is the operating life of the TM-1901AS?

The switch is rated for up to 50,000 operating cycles,ensuring long-term reliability in demanding applications.

Which industries commonly use this rotary switch?

The TM-1901AS is widely used in smart home systems,industrial automation,medical equipment,portable instrumentation,consumer electronics,and embedded control systems.

Is the TM-1901AS suitable for automated PCB assembly?

Yes.Its SMD rotary selector switch design is optimized for automated pick-and-place assembly and standard reflow soldering processes.