ABB Aux.Contact 1+1 SF 40A OA4B1C

Q: What contact configuration does the OA4B1C have?

The OA4B1C features a 1 C/O changeover contact configuration with one normally open and one normally closed contact.

Q: What current rating does the OA4B1C support?

The OA4B1C supports a rated current of 16 A for auxiliary switching applications.

ABB OA4B1C auxiliary contact block with one changeover contact designed for OS Mini switch disconnectors in industrial control applications.

SKU: OA4B1CAlt SKU: OA4B1CMPN: 1SCA022193R0150

List Price £18.13 ex VAT

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£18.13

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Why Choose the ABB OA4B1C Auxiliary Contact Block?

The ABB OA4B1C is a compact and reliable auxiliary contact block designed to provide additional switching and status indication capability for ABB OS Mini switch disconnectors and switch fuses. It enables electrical monitoring, signalling and control integration within industrial power distribution and automation systems.

This auxiliary contact mechanism features a changeover contact arrangement, allowing both normally open and normally closed switching functions from a single auxiliary device. The OA4B1C is mounted directly to the switch mechanism and is designed for use with compatible ABB OS Mini switch disconnectors.

With a 1 C/O changeover contact configuration, 16 A current rating and compatibility with ABB OS Mini switch disconnectors, the OA4B1C provides dependable auxiliary signalling for industrial control panels and electrical distribution applications.

Key Advantages

Compact auxiliary contact mechanism for ABB switch disconnectors.
1 changeover contact (C/O) for flexible monitoring and control.
16 A current rating for reliable auxiliary switching applications.
Designed for ABB OS Mini switch disconnectors.
Direct mounting to the switch mechanism for easy installation.
Supports electrical indication, interlocking and automation feedback functions.

Key Features

ABB OA4B1C auxiliary contact series.
1 C/O (SPDT) auxiliary contact.
1 NO and 1 NC contact arrangement.
16 A rated current.
Mounting to switch mechanism design.
Screw terminal connection.
Suitable for ABB OS Mini switch disconnectors.
Compact accessory design for industrial control applications.

Reliable Switch Monitoring for Industrial Systems

Auxiliary contact blocks such as the ABB OA4B1C allow switch disconnectors and fuse switches to provide electrical feedback to control systems. This enables improved monitoring, interlocking and automation functionality in industrial installations.

The OA series is designed for electrical engineers and panel builders requiring dependable accessories that integrate seamlessly with ABB switching equipment and provide additional control flexibility.

Typical Applications

Industrial control panels.
ABB OS Mini switch disconnectors.
Motor isolation and control systems.
Electrical distribution equipment.
Automation and monitoring circuits.
OEM machinery control systems.

Technical Specifications

Manufacturer	ABB
Series	OA Auxiliary Contacts
Model	OA4B1C
Product type	Auxiliary contact block
Contact configuration	1 C/O changeover contact
Auxiliary contacts	1 NO + 1 NC
Rated current	16 A
Mounting type	Switch mechanism mounting
Terminal connection	Screw terminals
Suitable for	ABB OS Mini switch disconnectors
Compatible range	OS16, OS20, OS25, OS30, OS32, OS40
Protection rating	IP20
ABB product ID	1SCA022193R0150
Weight	approx. 0.03 kg
Device Type	Auxiliary contact block
Auxiliary Contacts	1NO + 1NC

Frequently Asked Questions

What is the ABB OA4B1C used for?

The ABB OA4B1C is an auxiliary contact block used to provide additional switching feedback and control capability for ABB OS Mini switch disconnectors.

What contact configuration does the OA4B1C have?

The OA4B1C features a 1 C/O changeover contact configuration with one normally open and one normally closed contact.

Which ABB switches is the OA4B1C compatible with?

The OA4B1C is designed for use with compatible ABB OS Mini switch disconnectors and switch fuse products.

How is the OA4B1C installed?

The auxiliary contact is mounted directly to the switch mechanism using a compact integrated installation design.

What current rating does the OA4B1C support?

The OA4B1C supports a rated current of 16 A for auxiliary switching applications.

Trusted by Industrial Control Engineers

ABB OA auxiliary contact blocks provide reliable switching feedback and control solutions for industrial electrical systems, automation panels and power distribution equipment.

UK delivery

Delivery options

Free UK delivery on orders over £200 ex VAT. Order in-stock items before 2pm Monday to Friday for next-day delivery.

This product In stock

Available for immediate delivery. Order before 2pm Monday to Friday for next-day delivery.

Standard delivery

£8 ex VAT · free over £200

UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.

Heavier items may be charged at a weight-based or pallet rate, shown at checkout.

Next-day delivery

Order before 2pm

Available on in-stock items ordered before 2pm, Monday to Friday.

Parcels are sent with DHL, FedEx or DX.

Saturday delivery

+£25

Saturday morning delivery is available on in-stock parcels ordered on a Friday.

Not available for pallet deliveries.

Collect from our showroom

Mon–Fri, 8am–5pm

Order and pay online, then collect from our showroom.

Please allow 15–30 minutes after ordering for us to prepare your order.

Northern Ireland, ROI & export

Priced at checkout

We deliver to Northern Ireland, the Republic of Ireland and overseas.

Delivery is calculated at checkout based on your destination.

Orders with mixed availability

Shipped complete

If part of your order is on a lead time, we hold it and send everything together.

Need the in-stock items sooner? Ask us and we can split the delivery.

Business customer returns

Returns & order support

Need to return an item? Find the guidance for your order below, then contact our team before sending anything back.

Stocked items

Request within 30 days

Changed your mind or ordered the wrong item? Request a return within 30 days of receipt. There is no restocking charge.

Items must be unused, in resalable condition and in their original packaging, and returns need our approval first. Return carriage is at your cost, and the original delivery charge is not refunded.

Faulty or damaged items

Tell us as soon as possible

Faulty, damaged on delivery or the wrong product supplied? Contact our team as soon as possible with the details.

We will review the issue and arrange an appropriate resolution under our terms and conditions and your statutory rights.

Made-to-order items

Manufacturer approval needed

Manufactured, configured and special-order products can only be returned with the manufacturer’s approval. Any handling charge is agreed with you when you request the return.

This does not affect claims for faulty goods or items that do not meet the agreed specification.

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Let’s get your return sorted.

Send your order number, product details and reason for return. For faults or delivery damage, include photographs if available. We will confirm the next steps.

Email returns team 01706 242050

The 30-day return request period applies to change-of-mind returns for stocked items. It does not limit your statutory rights for faulty or non-conforming goods.

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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.

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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 Trusted Manfacturers

● frequently asked questions

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.

What product ranges do you supply

We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.

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