Key Switch/Power Lock

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Momentary Switch

  • 16mm Stainless Steel Push Button Switch
    16mm Stainless Steel Push Button Switch
    16mm Stainless Steel Push Button Switch
    16mm Stainless Steel Push Button Switch
    16mm Stainless Steel Push Button Switch
    16mm Stainless Steel Push Button Switch
    16mm Stainless Steel Push Button Switch
    16mm Stainless Steel Push Button Switch

    Product Overview
    This 16 mm stainless steel push-button switch blends compact size with durable build — the 16 mm diameter makes it ideal for tight panel spaces, while the stainless steel body ensures corrosion resistance and premium texture. It offers optional socket-wired connections for reliable contact, self-locking action for stable operation, and a new internal design to resist welding deformation under frequent use. It is suited for industrial panels, control boxes, and outdoor equipment.

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  • 19mm 7Pin/5Pin Metal Push Button Switch
    19mm 7Pin/5Pin Metal Push Button Switch
    19mm 7Pin/5Pin Metal Push Button Switch
    19mm 7Pin/5Pin Metal Push Button Switch
    19mm 7Pin/5Pin Metal Push Button Switch
    19mm 7Pin/5Pin Metal Push Button Switch
    19mm 7Pin/5Pin Metal Push Button Switch
    19mm 7Pin/5Pin Metal Push Button Switch

    Product Overview
    This 19 mm metal push button switch features either 7-pin or 5-pin configurations, offering flexibility for complex circuits where multiple connections or logic signals are required. The larger 19 mm diameter affords a more tactile actuation feel, combined with a self-locking mechanism for latching operation. Robust metal construction delivers an elegant appearance and strong resistance to mechanical wear. IP65 waterproofing ensures dust and water resistance; mechanical endurance reaches up to 1,000,000 cycles.

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  • 22mm Two/Three Color Metal Push Button Switch
    22mm Two/Three Color Metal Push Button Switch
    22mm Two/Three Color Metal Push Button Switch
    22mm Two/Three Color Metal Push Button Switch

    Product Overview
    The 22-mm two-/three-color metal push button switch elevates visual feedback with multi-color illumination. The larger 22 mm face allows broader, more vibrant LED zones for dual- or tri-color lighting. Built with premium metal texture, self-locking design, and optional wired socket connections ensures both user comfort and contact stability. Use in safety panels, control stations, marine equipment, or any setting where visual differentiation is important.

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  • 19mm 12/24/48/220V Waterproof Metal Push Button Switch
    19mm 12/24/48/220V Waterproof Metal Push Button Switch
    19mm 12/24/48/220V Waterproof Metal Push Button Switch
    19mm 12/24/48/220V Waterproof Metal Push Button Switch
    19mm 12/24/48/220V Waterproof Metal Push Button Switch
    19mm 12/24/48/220V Waterproof Metal Push Button Switch
    19mm 12/24/48/220V Waterproof Metal Push Button Switch
    19mm 12/24/48/220V Waterproof Metal Push Button Switch

    Product Overview
    This 19 mm waterproof metal push button switch is designed for variable voltage applications, supporting common industrial and automotive voltages (12, 24, 48, 220V). Its construction ensures safety and reliability under diverse power conditions. The robust metal housing, enlarged actuation diameter, and self-locking structure provide a stable tactile operation, while a new internal design reduces welding deformation at the contacts. Waterproof performance is certified at IP65 and can be upgraded to IP67/IP68, making it suitable for outdoor or moisture-exposed installations.

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  • 22mm Momentary Latching Metal Push Button Switch
    22mm Momentary Latching Metal Push Button Switch
    22mm Momentary Latching Metal Push Button Switch
    22mm Momentary Latching Metal Push Button Switch

    Product Overview
    The 22 mm Momentary Latching Metal Push Button Switch combines the advantages of momentary actuation with a latch-type locking mechanism, enabling a press to trigger an action and remain engaged until pressed again. Its robust stainless steel body delivers excellent resistance to corrosion and mechanical wear, while gold-plated contacts ensure strong resistance to oxidation and very low contact resistance. The large button diameter enhances user comfort and reduces mis-pressing risk.

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  • 25mm 1NO1NC Self-Locking Push Button Switch
    25mm 1NO1NC Self-Locking Push Button Switch
    25mm 1NO1NC Self-Locking Push Button Switch
    25mm 1NO1NC Self-Locking Push Button Switch

    Product Overview
    This 25 mm 1NO/1NC Self-Locking Push Button Switch offers dual contact outputs—one normally open, one normally closed—allowing both make and break functions in a single device. Its self-locking mechanism retains the button’s state until manually released, making it ideal for control circuits needing persistent feedback. The durable metal texture and thickened silver contact points improve electrical life, and the housing is designed to resist welding deformation under high load.

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  • 2-3 Position Selector Metal Rotary Push Button

    Product Overview
    The 2-3 Position Selector Metal Rotary Push Button is a rotary selector combining push-button action with multi-position switching (2 or 3 positions), providing versatile control for multi‐mode equipment. Fabricated with precision metal construction, it ensures a tactile, stable rotary action plus a push-to-select or push-to-release actuation, depending on configuration. Gold-plated pins enhance oxidation resistance, while thick silver dots at the contact interface improve electrical life.

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  • Stainless Steel Metal Knob Key Switch with Light

    Product Overview
    The Stainless Steel Metal Knob Key Switch with Light integrates security, illumination, and durable design into one component. Featuring a keyed knob, it allows access control while preventing unauthorized activation. Embedded lighting (single or multicolor) around the knob gives visual indication of status, aiding usability in low-light conditions or as signal feedback. The stainless steel finish delivers high-end aesthetics, excellent corrosion resistance, and a tactile feel.

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  • 22mm 2NO2NC Stainless Steel Push Button Switch
    22mm 2NO2NC Stainless Steel Push Button Switch
    22mm 2NO2NC Stainless Steel Push Button Switch
    22mm 2NO2NC Stainless Steel Push Button Switch

    Product Overview
    The 22 mm 2NO2NC Stainless Steel Push Button Switch features dual pairs of contacts—two normally open and two normally closed—offering flexible wiring options for multiple circuits in one device. Thickened silver contact points and gold-plated interfaces ensure long electrical life and stable switching. Designed to withstand over a million mechanical actuations, the switch offers reliable performance in safety circuits, interlocks, or situations where redundant or multiple output signals are required.

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  • 12mm Short Stroke Waterproof Momentary Metal Button Switch
    12mm Short Stroke Waterproof Momentary Metal Button Switch
    12mm Short Stroke Waterproof Momentary Metal Button Switch
    12mm Short Stroke Waterproof Momentary Metal Button Switch
    12mm Short Stroke Waterproof Momentary Metal Button Switch
    12mm Short Stroke Waterproof Momentary Metal Button Switch

    Product Overview
    This 12 mm short-stroke waterproof momentary metal button switch combines compact precision with industrial-grade durability. Designed for applications with limited panel space, it features an ultra-short actuation distance (typically ≤ 0.5 mm to ~2.5 mm depending on version) for swift, tactile feedback. The metal body—often stainless steel or plated alloy—ensures resilience to mechanical wear, while sealed construction gives protection according to IP65–IP67 ratings.

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  • 16mm Waterproof Short-travel Metal Button Switch
    16mm Waterproof Short-travel Metal Button Switch
    16mm Waterproof Short-travel Metal Button Switch
    16mm Waterproof Short-travel Metal Button Switch
    16mm Waterproof Short-travel Metal Button Switch
    16mm Waterproof Short-travel Metal Button Switch
    16mm Waterproof Short-travel Metal Button Switch
    16mm Waterproof Short-travel Metal Button Switch

    Product Overview
    The 16 mm waterproof short-travel metal button switch delivers a generous button diameter for improved ergonomics, paired with precise actuation in harsh environments. With a travel distance slightly greater than ultra-short types (commonly ~2.5-3 mm), it offers a more substantial feel while still being responsive. Its waterproof sealing achieves IP65 or IP67 protection, safeguarding internal components from moisture and dust.

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  • 12mm IP67 Metal Push Button for 220V/250V Control
    12mm IP67 Metal Push Button for 220V/250V Control
    12mm IP67 Metal Push Button for 220V/250V Control
    12mm IP67 Metal Push Button for 220V/250V Control
    12mm IP67 Metal Push Button for 220V/250V Control
    12mm IP67 Metal Push Button for 220V/250V Control
    12mm IP67 Metal Push Button for 220V/250V Control
    12mm IP67 Metal Push Button for 220V/250V Control

    Product Overview
    This 12 mm metal push button is engineered for 220-250 V AC control circuits, delivering reliable switching in harsh environments. The robust metal housing, paired with an IP67 rating, ensures full protection against dust ingress and immersion up to 1 meter, making it ideal for outdoor or industrial panels. Featuring high-voltage contact components with gold-plated pins to reduce oxidation and improve conductivity, it is designed for both safety and longevity.

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Our Metal Pushbutton Switches are made for industrial applications. Constructed from high-quality materials such as zinc alloy, stainless steel, or brass, these switches offer robust performance in harsh environments. Available in sizes ranging from 12mm to 25mm, they are suitable for panel mounting and are designed to withstand mechanical stresses. These switches typically feature a mechanical life of up to 1,000,000 cycles and an electrical life of up to 100,000 cycles. With options for momentary or latching actions, they provide versatility to meet diverse operational needs. Protection ratings such as IP65 or IP67 ensure resistance against dust and water ingress, making them ideal for outdoor and industrial settings.

About Us
Zhejiang Wandu Electric Co., Ltd.

Zhejiang Wandu Electric Co., Ltd. is a professional enterprise that integrates research and development, production, and sales, focusing on providing customers with high-quality electrical products. As a China Metal Pushbutton Switches suppliers and Metal Pushbutton Switches factory, it has a strong R&D team, as well as well-established departments for mold development, design and development, and technical engineering.


Wandu Electric mainly produces various switch products such as metal button switches, metal indicator lights, metal emergency stop switches, knobs, keys, buzzers, etc. lts switch products have the characteristics of waterproof and dustproof, and are the only ones in the industry that have independently passed the airtightness test for metal button switches, ensuring the reliability of the product in various environments. The company provides switches and indicator lights with various installation diameters, including conventional series, high current series, waterproof series, and can be customized and developed according to customer needs.

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Metal Pushbutton Switches Industry knowledge

How Does a Key Switch Control Authorized Power Access?

A Key Switch, often referred to as a Power Lock, is designed to limit who can enable or disable a system. Unlike standard pushbuttons, it requires a physical key to change its position, adding a layer of control that is independent of software or passwords.

In practice, key switches are commonly used to prevent unauthorized startup, accidental energizing during maintenance, or unintended changes to machine states. For example, in production equipment, a power lock may be used to allow only supervisors or technicians to activate the main control circuit. Once the key is removed, the switch remains mechanically locked in position.

There are different configurations, such as maintained positions (key stays in ON or OFF) or spring-return types (key must be held and then returns automatically). Selecting the correct type depends on whether the operation should persist after release. Electrical contact arrangements also matter: some applications require separate contacts for control signals and interlocks. From a practical standpoint, users should also consider key management, as lost or duplicated keys can reduce the intended level of control.

Why Is a Momentary Switch Used for Temporary Actions?

A Momentary Switch is defined by its operating principle: it only changes state while being physically actuated. Once released, it returns to its original position automatically. This behavior makes it suitable for commands that should not remain active without continuous user input.

Common examples include jog controls, reset buttons, or manual overrides. In these cases, the system should respond only while the operator is intentionally pressing the switch. This reduces the chance of unintended continuous motion or repeated actions after the operator steps away.

From a circuit design perspective, momentary switches are often paired with relays, timers, or programmable controllers that interpret short signals. Contact type selection—normally open or normally closed—depends on whether the action initiates or interrupts a process. Mechanical life and actuation force also play a role, especially in applications with frequent use. Choosing a momentary switch without considering usage frequency can cause premature wear or inconsistent feedback for the operator.

What Is the Role of a Selector Switch or Mode Selector?

A Selector Switch, also called a Mode Selector, allows users to choose between predefined operating states. Unlike momentary switches, selector switches usually have maintained positions, meaning the selected mode stays active until deliberately changed.

Typical applications include selecting automatic or manual operation, choosing speed ranges, or switching between process stages. The switch positions are often labeled clearly on the panel to avoid ambiguity, and mechanical detents help provide tactile confirmation of each selection.

One important consideration is the number of positions and contact combinations. A multi-position mode selector may control several circuits simultaneously, depending on its internal cam structure. This makes it possible to coordinate multiple signals with a single user action. However, improper wiring or unclear labeling can cause confusion, especially during troubleshooting.

Another factor is whether the selector includes a key mechanism. In some systems, a key-operated mode selector restricts access to certain modes, such as maintenance or setup, adding functional overlap with power lock concepts while still focusing on mode control rather than power isolation.

How Should These Switches Work Together in Practice?

Each of these switch types addresses a different question: who can operate the system, how long an action should last, and which mode the system should follow. Using them together creates a structured interface where authority, intent, and system behavior are clearly separated.

For example, a key switch may enable the control circuit, a selector switch defines the operating mode, and a momentary switch triggers specific actions within that mode. This layered approach reduces operator error and simplifies training, as each control has a clearly defined purpose.

Practical Takeaways for System Designers and Users

Viewed as a group, these switches are less about hardware variety and more about human interaction with machines. Key Switch/Power Lock devices manage permission, Momentary Switches manage intent, and Selector Switch/Mode Selector units manage system state. When each is selected based on function rather than habit, control panels become easier to understand and safer to use. Over time, this clarity supports smoother operation, quicker fault diagnosis, and more predictable machine behavior without adding unnecessary complexity.