P1MB3PB20 - MINIATURE CIRCUIT BREAKER 3P CURVE B 20A

P1MB3PB20 – MINIATURE CIRCUIT BREAKER 3P CURVE B 20A

Lovato P1MB3PB20 three-pole miniature circuit breaker with a 20 A rated current, B tripping curve and 10 kA breaking capacity for industrial and commercial circuit protection.

SKU: P1MB3PB20MPN: P1MB3PB20
Price
List Price £84.25 ex VAT
Your Price (ex VAT)
£84.25
Manufacturer Lead Time Please contact us for a delivery time before you order
Get the best trade prices Trade exclusive

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

SUBTOTAL (EX VAT) £84.25
Trade pricing is personalised to your account

Manufacturer Lead Time

£84.25

Why Choose the Lovato P1MB3PB20 Miniature Circuit Breaker?

The Lovato P1MB3PB20 is a high-quality three-pole miniature circuit breaker (MCB) designed to provide dependable protection against overloads and short circuits in industrial and commercial electrical installations. Part of the reliable Lovato P1MB modular protection range, it combines compact dimensions with excellent electrical performance, making it ideal for switchboards, distribution panels and OEM machinery.

With a 20 A rated current, B tripping characteristic and a 10 kA short-circuit breaking capacity, the P1MB3PB20 delivers rapid fault protection for circuits with relatively low inrush currents. Its three-pole design allows simultaneous isolation of all phases, helping improve both safety and system reliability.

Designed for use on 230/400 V AC systems, this compact breaker occupies just three DIN modules and mounts directly onto a standard 35 mm DIN rail. Its robust construction and compliance with recognised international standards make it suitable for demanding industrial environments.

Key Advantages

  • Reliable 3-pole miniature circuit breaker for three-phase installations.
  • 20 A rated current suitable for industrial and commercial circuits.
  • B tripping characteristic for circuits with low inrush currents.
  • 10 kA breaking capacity provides dependable fault protection.
  • Compact 3 DIN module design saves enclosure space.
  • Simple installation onto a standard 35 mm DIN rail.
  • Long mechanical and electrical operating life.
  • Manufactured by trusted automation specialist Lovato Electric.

Key Features

  • Lovato P1MB miniature circuit breaker series.
  • 3 poles (3P).
  • 20 A rated current.
  • B tripping curve.
  • 10 kA short-circuit breaking capacity.
  • 230/400 V AC rated operational voltage.
  • 440 V insulation voltage (Ui).
  • 4 kV impulse withstand voltage (Uimp).
  • Current limiting class 3.
  • Thermal and magnetic trip mechanism.
  • 35 mm DIN rail mounting.
  • IP20 frontal protection.

Reliable Circuit Protection for Industrial Installations

Miniature circuit breakers automatically disconnect electrical circuits whenever overload or short-circuit conditions occur, helping protect wiring, electrical equipment and connected machinery. Combining thermal overload protection with instantaneous magnetic tripping provides dependable circuit protection under normal operating conditions.

The Lovato P1MB3PB20 is engineered for industrial automation systems, OEM machinery, switchboards and commercial electrical installations where reliable overcurrent protection, compact dimensions and long operating life are essential.

Typical Applications

  • Industrial control panels.
  • Three-phase distribution boards.
  • OEM machinery.
  • Automation systems.
  • Commercial electrical installations.
  • Building services.
  • Production equipment.
  • General electrical protection circuits.

Technical Specifications

Current 20 A
Phase Three Phase
Manufacturer Lovato Electric
Series P1MB
Model P1MB3PB20
Product type Miniature circuit breaker
Number of poles 3P
Rated current 20 A
Tripping characteristic B
Breaking capacity 10 kA
Rated operational voltage 230/400 V AC
Rated insulation voltage (Ui) 440 V
Rated impulse withstand voltage (Uimp) 4 kV
Frequency 50 / 60 Hz
Current limiting class 3
DIN modules 3
Mounting type 35 mm DIN rail
Mechanical life 20,000 operations
Electrical life 10,000 operations
Operating temperature -40°C to +70°C
Storage temperature -40°C to +80°C
Maximum altitude 2,000 m
Terminal capacity 1 to 35 mm²
Terminal tightening torque 1.8 to 2 Nm
Protection rating IP20
Weight Approx. 345 g
HS Code 85362010
Poles 3-pole
Device Type MCB
Trip Curve B curve
Breaking Capacity 10 kA

Frequently Asked Questions

What is the Lovato P1MB3PB20 used for?

It protects three-phase electrical circuits against overloads and short circuits in industrial, commercial and OEM applications.

What is the rated current?

The P1MB3PB20 has a 20 A rated current.

What tripping characteristic does this breaker use?

This model features a B tripping curve, making it suitable for circuits with relatively low inrush currents.

What is the breaking capacity?

The breaker provides a 10 kA short-circuit breaking capacity.

How is the breaker installed?

The P1MB3PB20 mounts directly onto a standard 35 mm DIN rail and occupies three DIN modules.

Trusted by Electrical Professionals Worldwide

Lovato miniature circuit breakers are trusted by panel builders, OEM manufacturers and electrical contractors for dependable circuit protection, long operating life and reliable performance across industrial and commercial electrical installations.

● 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…

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

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

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...