EMAS A21B1K10 Rocker Switch Black Body Red Button 1NO Non Illuminated Terminal 0-I Marked
The EMAS A21B1K10 is a compact industrial rocker switch designed for reliable ON/OFF control applications in electrical panels, machinery, and automation equipment. Featuring a 30x11mm black body design, red actuator, and 1NO (1 Normally Open) contact configuration, this A21 Series rocker switch delivers dependable switching performance for industrial applications.
Manufactured by EMAS, the A21B1K10 features a 0-I marked red button, non-illuminated operation, and terminal connection. It is rated at 16A at 250V AC with a mechanical and electrical life of 50,000 operations, making it suitable for control panels, OEM machinery, and general-purpose switching applications.
Product Features
Manufacturer: EMAS
Part Number: A21B1K10
Series: A21 Series Rocker Switch
Type: Rocker Switch
Body Colour: Black
Button Colour: Red
Size: 30 x 11mm
Contact Configuration: 1NO (1 Normally Open)
Marking: 0-I ON/OFF
Illumination: Without Illumination
Connection Type: Terminal
Rated Current: 16A
Rated Voltage: 250V AC
Contact Material: AgNi
Protection Rating: IP20
Operating Temperature: -25°C to +80°C
Applications
The EMAS A21B1K10 rocker switch is suitable for industrial automation panels, machinery controls, electrical cabinets, control stations, and OEM equipment requiring a compact red actuator ON/OFF switch.
Why Choose the EMAS A21B1K10?
Compact 30x11mm mounting size for space-saving installations
Reliable 1NO switching operation
High 16A / 250V AC switching capacity
Red actuator for easy visual identification
Secure terminal connection design
Long mechanical and electrical service life
Technical Specifications
Specification Details Product Type
Rocker Switch
Model
A21B1K10
Series
A21
Contact Type
1NO
Illumination
None
Body Colour
Black
Button Colour
Red
Connection Type
Terminal
Electrical Rating
16A / 250V AC
Usage Category
AC15
Mechanical Life
50,000 operations
Electrical Life
50,000 operations
Insulation Voltage
300V
Impulse Withstand Voltage
2.5kV
Frequently Asked Questions
What is the EMAS A21B1K10?
The EMAS A21B1K10 is a black body rocker switch with a red button, 1NO contact configuration, terminal connection, and 0-I marking.
Is the EMAS A21B1K10 illuminated?
No, the A21B1K10 is a non-illuminated rocker switch.
What is the current rating of the A21B1K10?
The EMAS A21B1K10 is rated at 16A at 250V AC.
Where can the A21B1K10 be used?
It is commonly used in industrial control panels, automation equipment, machinery, and electrical control systems.
Specification Details Product Type
Rocker Switch
Model
A21B1K10
Series
A21
Contact Type
1NO
Illumination
None
Body Colour
Black
Button Colour
Red
Connection Type
Terminal
Electrical Rating
16A / 250V AC
Usage Category
AC15
Mechanical Life
50,000 operations
Electrical Life
50,000 operations
Insulation Voltage
300V
Impulse Withstand Voltage
2.5kV
No documents available for this product.
Delivery
We offer fast UK delivery on all stocked items. Orders placed before 3pm Monday to Friday are eligible for next-day delivery.
Standard delivery: 2–3 working days
Next-day delivery: available on in-stock items when ordered before 3pm
Express options available — contact us for details
Returns
If you need to return an item, please contact our sales team within 30 days of receipt. Items must be returned unused in their original packaging.
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.
Priority sourcing and supply support
Flexible payment terms for qualifying organisations
Support for engineering, maintenance, and operations
500 +
Stock lines ready to ship
1,000 +
Same day dispatches
3500 +
Customers supported
28
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Common questions about our products and support
At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
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We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...