Why Choose the Lovato BFX5303 Mechanical Interlock?
The Lovato BFX5303 is a compact and reliable mechanical interlock accessory designed for use with Lovato BF series contactors in industrial motor control and automation applications. It provides a secure mechanical locking function that prevents two contactors from being energised simultaneously, making it ideal for reversing starters and changeover contactor assemblies.
Designed as a front-mounted mechanical interlock for compatible BF40, BF50, BF65, BF80 and BF94 contactors, the BFX5303 enables safe and reliable contactor pairing without additional electrical control wiring. Its compact construction allows efficient installation within industrial control panels.
With its lightweight design and dedicated compatibility with Lovato BF contactors, the BFX5303 provides a dependable solution for motor reversing circuits, transfer switching systems and industrial automation equipment requiring reliable mechanical contactor coordination.
Key Advantages
Reliable mechanical interlock accessory for Lovato BF contactors.
Front-mounted design for straightforward installation on compatible contactors.
Prevents simultaneous operation of paired contactors.
Suitable for BF40, BF50, BF65, BF80 and BF94 contactors.
Ideal for reversing motor starters and contactor changeover systems.
Compact and lightweight industrial construction with a weight of approximately 20 g.
Key Features
Lovato BFX5303 mechanical interlock.
Front mounting configuration.
Compatible with BF40 to BF94 contactors.
Designed for mechanical locking between two contactors.
Suitable for motor reversing and changeover assemblies.
Compact design for industrial control panels.
Supports reliable contactor coordination in automation systems.
Reliable Contactor Interlocking for Industrial Control
Mechanical interlocks such as the Lovato BFX5303 provide an essential protection function in electrical control systems by physically preventing incompatible contactors from closing at the same time. This is particularly important in reversing motor starter applications where simultaneous contactor operation could cause electrical faults.
The BFX5303 is designed for panel builders, automation engineers and electrical installers requiring dependable accessories for Lovato BF series contactors in industrial machinery and control systems.
Typical Applications
Motor reversing starter assemblies.
Industrial contactor changeover systems.
Automation control panels.
Machine control equipment.
Motor control centres.
Industrial electrical switchboards.
Technical Specifications
HS Code
85365080
Manufacturer
Lovato Electric
Series
BF Series Contactor Accessories
Model
BFX5303
Product type
Mechanical interlock accessory
Accessory type
Mechanical interlock
Mounting type
Front mount
Compatible contactors
BF40, BF50, BF65, BF80, BF94
Weight
approx. 20 g
Package quantity
5 pieces
Standards compliance
IEC/EN 60947-1, IEC/EN 60947-4-1
Certifications
cULus
Frequently Asked Questions
What is the Lovato BFX5303 used for?
The Lovato BFX5303 is used to mechanically interlock compatible BF series contactors and prevent simultaneous operation.
Which contactors are compatible with the BFX5303?
The BFX5303 is designed for use with BF40, BF50, BF65, BF80 and BF94 contactors.
How is the BFX5303 mounted?
The accessory uses a front-mounted installation format on compatible Lovato BF contactors.
What applications require a mechanical interlock?
Mechanical interlocks are commonly used in reversing starters, changeover systems and industrial contactor assemblies.
Does the BFX5303 require electrical wiring?
No. The BFX5303 provides mechanical interlocking between contactors without requiring additional electrical connections.
Trusted by Industrial Engineers Worldwide
Lovato contactor accessories are widely used by automation engineers and panel builders to create safe, reliable and efficient industrial switching systems.
HS Code
85365080
Manufacturer
Lovato Electric
Series
BF Series Contactor Accessories
Model
BFX5303
Product type
Mechanical interlock accessory
Accessory type
Mechanical interlock
Mounting type
Front mount
Compatible contactors
BF40, BF50, BF65, BF80, BF94
Weight
approx. 20 g
Package quantity
5 pieces
Standards compliance
IEC/EN 60947-1, IEC/EN 60947-4-1
Certifications
cULus
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.
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Customers supported
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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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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...