EMAS B101AA30 Key Selector Switch 2NO (II-0-I) 60° Stay Put 22mm Control Unit
The EMAS B101AA30 is a B Series plastic key-operated selector switch control unit designed for industrial
automation, machinery control panels, and electrical control applications. Featuring a 2NO contact configuration,
II-0-I three-position selector operation, a 60° stay-put maintained mechanism, and key-operated
locking functionality, this 22mm selector switch provides secure operator control and helps prevent unauthorised switching.
Manufactured by EMAS, the B101AA30 uses durable B Series plastic construction and is designed for reliable industrial
performance. The selector features key operation with removal at the 0 position, making it suitable for applications where
controlled access and secure switching are required.
Product Features
Brand: EMAS
Model: B101AA30
Product Type: Key Operated Selector Switch Control Unit
Series: B Series Plastic
Contact Configuration: 2NO (2 Normally Open)
Selector Positions: II-0-I
Switching Angle: 60°
Operation: Stay Put / Maintained
Key Operation: Yes
Key Removal Position: 0 Position
Mounting Diameter: 22mm
Protection Rating: IP50
Rated Current: 4A at 250V AC
Mechanical Life: Minimum 500,000 operations
Electrical Life: Minimum 100,000 operations
Applications
The EMAS B101AA30 key selector switch is suitable for industrial control panels, machine safety applications,
automation systems, electrical cabinets, motor control panels, and installations requiring restricted access switching.
Why Choose EMAS B101AA30?
Key-operated security to help prevent accidental switching
Three-position II-0-I selector functionality
Maintained stay-put operation
Dual normally open contact configuration
Standard 22mm industrial panel mounting design
Reliable solution for industrial automation and control systems
Technical Specifications
Specification Details Manufacturer
EMAS
Part Number
B101AA30
Product Series
B Series Plastic
Switch Type
Key Operated Selector Switch
Selector Type
Stay Put
Selector Position
II-0-I
Switching Angle
60°
Contact Configuration
2NO
Contact Material
AgNi
Rated Current
4A at 250V AC
Usage Category
AC-15
Insulation Voltage
300V
Impulse Withstand Voltage
2.5kV
Operating Temperature
-15°C to +80°C
Protection Degree
IP50
Mounting Size
Ø22mm
Cable Section
1.5-2.5mm²
Short Circuit Breaking Capacity
Ics 1kA
Standards
IEC 60947-5-1, TS EN 60947-5-1, UL 508, VDE 0660
Frequently Asked Questions
What is the EMAS B101AA30?
The EMAS B101AA30 is a 22mm B Series plastic key-operated selector switch with 2NO contacts and II-0-I maintained
selector operation.
Is the EMAS B101AA30 a maintained selector switch?
Yes. The B101AA30 uses a stay-put mechanism, allowing the selected position to remain fixed until manually changed.
How many contacts does the EMAS B101AA30 have?
The EMAS B101AA30 features two normally open (2NO) contacts.
When can the key be removed from the EMAS B101AA30?
The key can be removed in the 0 position, helping provide controlled access and secure operation.
Specification Details Manufacturer
EMAS
Part Number
B101AA30
Product Series
B Series Plastic
Switch Type
Key Operated Selector Switch
Selector Type
Stay Put
Selector Position
II-0-I
Switching Angle
60°
Contact Configuration
2NO
Contact Material
AgNi
Rated Current
4A at 250V AC
Usage Category
AC-15
Insulation Voltage
300V
Impulse Withstand Voltage
2.5kV
Operating Temperature
-15°C to +80°C
Protection Degree
IP50
Mounting Size
Ø22mm
Cable Section
1.5-2.5mm²
Short Circuit Breaking Capacity
Ics 1kA
Standards
IEC 60947-5-1, TS EN 60947-5-1, UL 508, VDE 0660
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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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...