Call Us Today
01706 242050
Trade Portal
1SAH100003R9900 ABB MCRA040ATJ Mini Contactor Relay 4NO Control Relay

1SAH100003R9900 ABB MCRA040ATJ Mini Contactor Relay 4NO Control Relay

ABB 1SAH100003R9900 MCRA040ATJ mini contactor relay with 4 normally open contacts, 110–115 V AC coil and 6 A switching capacity for industrial control applications.

SKU: 1SAH100003R9900Alt SKU: MCRA040ATJMPN: 1SAH100003R9900
Price
List Price £38.18 ex VAT
Your Price (ex VAT)
£38.18
Manufacturer Lead Time Estimated Delivery 7 weeks
Get the best trade prices Trade exclusive

Create a trade account to unlock exclusive pricing, special offers and more.

Sign up for a trade account Quick & easy setup
SUBTOTAL (EX VAT) £38.18
Trade pricing is personalised to your account

Manufacturer Lead Time

£38.18

Why Choose the ABB 1SAH100003R9900 MCRA040ATJ Mini Contactor Relay?

The ABB 1SAH100003R9900 is a compact and reliable mini contactor relay designed for switching control signals and auxiliary loads in residential, commercial and industrial automation applications. Part of the ABB M mini contactor relay series, it provides dependable switching performance where space-saving installation and reliable control are required.

This four-pole auxiliary contactor relay features a compact design with screw terminals, making it suitable for installation in control panels, electrical enclosures and DIN rail mounted applications. Its AC coil operation and multiple normally open contacts provide flexible solutions for control circuits, signalling and automation systems.

With a 110–115 V AC coil at 50 Hz, 4 normally open auxiliary contacts and switching capability up to 6 A / 240 V AC-15, the ABB 1SAH100003R9900 is ideal for industrial control systems, building automation and electrical switching applications where compact contactor relay functionality is required.

Key Advantages

  • Compact mini contactor relay for industrial control applications.
  • Four normally open auxiliary contacts for flexible signalling and switching.
  • 110–115 V AC coil voltage for control circuit integration.
  • Space-saving design for compact electrical panels.
  • Screw terminal connections for secure and reliable wiring.
  • Suitable for residential, commercial and industrial automation systems.

Key Features

  • ABB MCRA040ATJ mini contactor relay.
  • 4NO auxiliary contacts.
  • 110–115 V AC coil at 50 Hz.
  • 110–120 V AC coil at 60 Hz.
  • 6 A rated operational current.
  • 4 A operational current at 400 V.
  • Screw terminal connection technology.
  • Suitable for wall or DIN rail mounting.

Reliable Control Switching for Automation Systems

Mini contactor relays such as the ABB 1SAH100003R9900 provide reliable switching of control signals and auxiliary circuits in electrical automation systems. Their compact construction allows engineers to add dependable switching functionality while reducing panel space requirements.

The ABB M mini contactor relay range is designed for applications requiring reliable auxiliary switching, including industrial control panels, building automation systems and electrical installations where efficient control circuit management is essential.

Typical Applications

  • Industrial automation control panels.
  • Building automation systems.
  • Control signal switching applications.
  • Electrical distribution boards.
  • Machine control systems.
  • OEM equipment and industrial installations.

Technical Specifications

Coil Voltage Range 100–130 V
Manufacturer ABB
Series M Mini Contactors
Model 1SAH100003R9900 / MCRA040ATJ
Product type Mini contactor relay
Number of poles 4
Auxiliary contacts 4 normally open (NO)
Coil / Supply Voltage 110–115 V AC (50 Hz)
Rated operational current 6 A
Rated operational current at 400 V 4 A
Rated insulation voltage 690 V AC
Mounting type DIN rail or wall mounting
Connection type Screw terminals
Protection rating IP20
Dimensions (H × W × D) approx. 48 × 45 × 56 mm
Weight approx. 0.17 kg
Poles 4-pole
Coil / Supply Voltage 110 V AC, 115 V AC
Device Type Contactor relay
Auxiliary Contacts 4NO
Coil Type AC

Frequently Asked Questions

What is the ABB 1SAH100003R9900 used for?

The ABB 1SAH100003R9900 is a mini contactor relay used for switching control signals and auxiliary loads in automation and electrical control applications.

What coil voltage does the ABB 1SAH100003R9900 require?

The contactor relay operates with a 110–115 V AC coil at 50 Hz and 110–120 V AC at 60 Hz.

How many contacts does this mini contactor relay have?

The ABB 1SAH100003R9900 features four normally open auxiliary contacts.

What current can the ABB MCRA040ATJ switch?

The relay provides a rated operational current of 6 A and up to 4 A at 400 V.

Where is this contactor relay installed?

The device is typically installed inside electrical control panels, automation systems and DIN rail mounted enclosures.

Trusted by Automation Professionals Worldwide

ABB mini contactor relays provide compact and reliable switching solutions for industrial control, building automation and electrical system applications.

● 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.

 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 

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. 

Can you help specify the correct part?

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.

Do you have stock for urgent orders?

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.

What are your delivery times and costs?

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.

What about warranties, returns and faulty items?

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

Discover  our latest insights and
expert advice

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

by | Aug 11, 2026 |

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.

LED Controls: Danfoss Drives Authorised Partner

LED Controls: Danfoss Drives Authorised Partner

by | Jan 17, 2026 |

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...

LED Controls: Your Complete Control Panel Solution

LED Controls: Your Complete Control Panel Solution

by | Jan 17, 2026 |

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...