A momentary push button changes its contacts only while you hold it; a spring returns it when you let go. A latching (or maintained) push button stays in its actuated state after release until you operate it again. Either type can use normally open (NO) or normally closed (NC) contacts—the button’s action and its contact arrangement are separate choices.
What do momentary and maintained mean?
Momentary: spring return
Pressing a momentary button changes its contact state for as long as the actuator is held. Releasing it lets the spring return the actuator, and the contacts return to their resting state. This action suits inputs that should be brief or require someone to keep pressing, such as start, jog, reset and hold-to-run controls.
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Latching: retained action
A latching button stays actuated when released. It remains that way until it is operated again. This maintained action can suit an on/off control or mode selection where the button’s physical position should continue to show the selected state.
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1Repair Windows errors before they cause bigger problems2Scan for outdated or missing drivers - takes under a minute3Clear out junk files and repair common Windows errorsWhat do NO and NC contacts mean?
Normally open and normally closed describe the contact pair when the button is at rest, not whether the button is momentary or latching. Schneider Electric USA defines NO contacts as open when not actuated and closed when actuated; NC contacts are closed when not actuated and open when actuated. Read Schneider Electric USA’s NO and NC definitions.
#1 Best Overall
- This momentary button switch is made of durable stainless steel and aluminum alloy structure, with IP66 waterproof rating and IK09 resistance to damage, suitable for harsh environments.
- Momentary push button switch rated for 2A 12/24VDC and 1A 250VAC, ensuring reliable performance.
- Pre-wired with 20cm cables for quick and hassle-free installation in automotive, marine, or appliance applications.
- Rugged design withstands 100,000 electrical cycles, offering long-lasting durability and consistent operation.
- Normally open contact type with 0-250V operating range, ideal for industrial and commercial control systems.
- NO: open at rest; closes when actuated.
- NC: closed at rest; opens when actuated.
Both momentary and latching switches can be made with NO or NC contacts. Check the terminal markings and the manufacturer’s diagram for the exact switch; neither the button’s color nor its mechanical action tells you how its contacts are arranged.
How the two actions compare
| Question | Momentary | Latching / maintained |
|---|---|---|
| What happens when you release it? | A spring returns the actuator and contacts to their resting state. | The actuator and contact state remain changed until the button is operated again. |
| Typical control use | Start, jog, reset or hold-to-run input. | On/off control or mode selection. |
| Contact choice | Can be NO or NC. | Can be NO or NC. |
| What to consider after power loss | The released button does not determine what the whole control circuit does when power returns. | The button may remain latched while power is off; circuit design determines whether a command is re-energized when power returns. |
How to choose the right switch
- Decide whether the input should be temporary or retained. Choose momentary for an action that lasts only while pressed, or maintained when the selected state should persist after release.
- Select the contact state independently. Choose NO or NC based on the circuit’s requirements, then verify the exact terminals and contact diagram in the product documentation.
- Check how the whole control behaves. Consider power loss and restoration. A button alone does not establish whether a machine or load will restart; the control circuit determines that behavior.
- Verify the exact model’s specifications. Check its electrical switching ratings, number and type of contacts, mounting dimensions or panel cut-out, actuator style, illumination and required environmental protection. Options vary by product series, so do not generalize one model’s specifications to every push button.
- Confirm component compatibility. Some industrial product lines combine heads and contact blocks, but compatibility is model-specific. Confirm that the selected head and contact block are intended to work together.
Important safety distinction
A generic maintained push button is not automatically a safety-rated emergency-stop device. Emergency-stop equipment and the surrounding control system have requirements beyond the momentary-versus-latching distinction. Select and design safety controls for the applicable machine and local requirements; the simple action labels do not establish that a device is suitable for a safety function.
Quick Recap
Best Value
- [Momentary Switch]: Push Button & Hold - ON, Release Button - OFF.
- [Pre-wired Cable]: 20 Inch Pre-Wired Momentary Push Button Switch.
- [Double-Sided Tape]: No drilling required, paste installation.
- [What's In The Box]: 1*Momentary Switch + 2*Quick Connectors
- [What You Get]: We specialize in different kinds of trouble-free installation surface mount momentary switches for your need.
Rank #4
- Specifications: 12mm Momentary push button switch without Led(5PCS).
- How to use: The button switch operation type of this product is Momentary, keep pressing and holding the button = ON, hand off the button = OFF).
- Mounting hole size: 0.5"/12mm, please check the size carefully before purchasing.
- This switch can be used for: cars, ships, trucks, homes, coffee machines, industrial equipment, medical equipment, etc.
- Waterproof: As the product has IP65 Waterproof, it is very suitable for use in marine applications such as ships.
Rank #3
- Heavy Duty 50A Capacity:The Push Button Starter Switch is rated at 12V and 50A, ensuring reliable performance for heavy-duty applications such as engine starting and horn activation
- Weatherproof and Dustproof Design:Featuring a robust weatherproof and dustproof rubber cover, this switch is built to withstand harsh environments, preventing dirt, moisture, and dust from interfering with its functionality
- High-Quality Materials:Constructed with diecast aluminum housing and pure copper contacts, the switch is designed for durability and long-lasting use. The brass, nickel-plated screw terminals provide secure and stable connections
- Easy Installation with Mounting Plate:The switch requires a standard 5/8" (0.625") mounting hole and can be easily installed on panels up to 3/8" thick. It includes an additional iron plate for secure and easy installation, making it suitable for various DIY and professional applications
- Versatile Applications:Ideal for use in cars, trucks, boats, RVs, and ATVs, this push button starter switch is perfect for a wide range of applications, including engine starting, horn activation, and other electrical equipment
Rank #2
- Package contains 12pcs 7mm Prewired momentary mini push button,6 colours (red, yellow, blue, green, black, white),each colour 2pcs.
- Operation Type: Momentary; Contact Type: SPST; Rating Voltage: 3V-6V-12V-24V-230V/ 1A; 2 Pin, Nomal Open NO/NC.
- Momentary ON/OFF button (button is "on" only when the button is held down).
- Easy Installation: Pre-wired design,Nice soldering,easy to install,save your time to connect wire to the switches.
- The push button is used in industrial controlling circuits for controlling in electromagnetic starter, Contactor, Relay, electrified railway and power grid wire insulation protection.
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