ABB MCB-20B contact block, a rear mounting auxiliary contact block with two normally open silver contacts for ABB modular pilot devices and industrial control systems.
£12.54
The ABB 1SFA611610R2002 MCB-20B is a reliable auxiliary contact block designed for ABB modular plastic pilot devices, providing dependable switching performance for industrial control and signalling applications. As part of the ABB modular plastic range, it offers flexible configuration, high mechanical durability and reliable operation for machine builders and automation engineers.
This contact block features a non-illuminated design with rear mounting capability and silver contacts, allowing straightforward integration into ABB push buttons, selector switches and operator control assemblies. Its self-cleaning contact design supports reliable operation while helping reduce maintenance requirements in industrial environments.
With a configuration of 2 normally open (NO) contacts, the ABB MCB-20B provides additional switching capability for control circuits. Its rated insulation voltage of 690 V and compact construction make it suitable for a wide range of industrial automation and machine control applications.
Auxiliary contact blocks provide additional switching functions within industrial control circuits, allowing operators and automation systems to monitor and control equipment status. The ABB MCB-20B is engineered to deliver reliable electrical performance and long service life in industrial environments.
The ABB modular plastic range provides flexible operator interface solutions for OEM machine builders and panel manufacturers. The MCB-20B contact block enables efficient integration with compatible ABB pilot devices while maintaining dependable switching performance.
| Manufacturer | ABB |
|---|---|
| Series | Modular Plastic Range |
| Model | MCB-20B |
| Product code | 1SFA611610R2002 |
| Product type | Auxiliary contact block |
| Function | Non-illuminated double contact block |
| Contact material | Silver (Ag) |
| Mounting type | Rear mounting |
| Number of NO contacts | 2 |
| Rated insulation voltage | 690 V |
| Rated impulse withstand voltage | 6 kV |
| Rated frequency | 50 / 60 Hz |
| Rated operational current AC-15 | 6 A at 230 V AC |
| Rated operational current DC-13 | 5 A at 24 V; 0.55 A at 125 V |
| Protection rating | IP20 (terminals) |
| Pollution degree | 3 |
| Mechanical durability | 10 million operations |
| Power loss | Maximum 5 W |
| Terminal type | Screw terminals |
| Tightening torque | 0.9 N·m |
| Dimensions (W × H × D) | 20 × 44 × 28 mm |
| Weight | approx. 0.04 kg |
| Ambient operating temperature | -25 to +70 °C |
The ABB MCB-20B is an auxiliary contact block used with ABB modular plastic pilot devices to provide additional switching contacts in industrial control applications.
The MCB-20B has 2 normally open (NO) contacts and no normally closed contacts.
The MCB-20B uses silver (Ag) contacts for reliable switching performance.
The MCB-20B has a rated insulation voltage of 690 V.
The contact block is designed for rear mounting with screw terminal connections.
ABB modular contact blocks are widely used in industrial automation and machine control applications where reliable switching, flexible configuration and long service life are required.{ "@context": "https://schema.org/", "@type": "Product", "name": "ABB MCB-20B Contact Block 1SFA611610R2002", "sku": "1SFA611610R2002", "mpn": "1SFA611610R2002", "brand": { "@type": "Brand", "name": "ABB" }, "category": "Auxiliary Contact Blocks", "description": "ABB MCB-20B contact block, a rear mounting auxiliary contact block with two normally open silver contacts for ABB modular pilot devices and industrial control systems.", "additionalProperty": [ { "@type": "PropertyValue", "name": "Contact configuration", "value": "2 NO + 0 NC" }, { "@type": "PropertyValue", "name": "Contact material", "value": "Silver (Ag)" }, { "@type": "PropertyValue", "name": "Rated insulation voltage", "value": "690 V" }, { "@type": "PropertyValue", "name": "Mounting type", "value": "Rear mounting" }, { "@type": "PropertyValue", "name": "Mechanical durability", "value": "10 million operations" } ] } { "@context": "https://schema.org", "@type": "FAQPage", "inLanguage": "en-GB", "mainEntity": [ { "@type": "Question", "name": "What is the ABB MCB-20B used for?", "acceptedAnswer": { "@type": "Answer", "text": "The ABB MCB-20B is an auxiliary contact block used with ABB modular plastic pilot devices to provide additional switching contacts in industrial control applications." } }, { "@type": "Question", "name": "How many contacts does the MCB-20B have?", "acceptedAnswer": { "@type": "Answer", "text": "The MCB-20B has 2 normally open (NO) contacts and no normally closed contacts." } }, { "@type": "Question", "name": "What type of contacts are used in the ABB MCB-20B?", "acceptedAnswer": { "@type": "Answer", "text": "The MCB-20B uses silver (Ag) contacts for reliable switching performance." } }, { "@type": "Question", "name": "What voltage rating does the ABB MCB-20B support?", "acceptedAnswer": { "@type": "Answer", "text": "The MCB-20B has a rated insulation voltage of 690 V." } }, { "@type": "Question", "name": "How is the ABB MCB-20B installed?", "acceptedAnswer": { "@type": "Answer", "text": "The contact block is designed for rear mounting with screw terminal connections." } } ] }
● Service Agreements
Credit Accounts
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.
● frequently asked questions
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.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...