P1MBUH1PD12 Lovato MCB 1P D12 277V 10KA UL489

P1MBUH1PD12 Lovato MCB 1P D12 277V 10KA UL489

Lovato P1MBUH1PD12 is a single-pole 12 A Curve D UL489 miniature circuit breaker rated at 277 V AC under UL with a 10 kA short-circuit rating for industrial branch circuit protection.

SKU: P1MBUH1PD12
Price
List Price £58.22 ex VAT
Your Price (ex VAT)
£58.22
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) £58.22
Trade pricing is personalised to your account

Manufacturer Lead Time

£58.22

Why Choose the Lovato P1MBUH1PD12 Miniature Circuit Breaker?

The Lovato P1MBUH1PD12 is a compact single-pole miniature circuit breaker (MCB) designed to provide thermal-magnetic overcurrent and short-circuit protection in industrial control and electrical distribution applications. As part of the Lovato P1 MB miniature circuit breaker series, it combines a 12 A rated current with Curve D tripping characteristics and UL489 compliance for branch circuit protection.

The P1MBUH1PD12 features a Curve D tripping characteristic, making it particularly suitable for circuits and equipment that can experience relatively high transient inrush currents. This characteristic makes the breaker a practical choice for industrial loads such as transformers, solenoids, power supplies and other equipment where higher starting currents may occur.

With a rated current of 12 A, a UL rated operational voltage of 277 V AC and a short-circuit rating of 10 kA, the P1MBUH1PD12 provides dependable protection for industrial installations. Its single-pole modular construction enables straightforward installation on a standard 35 mm DIN rail.

Key Advantages

  • Compact single-pole miniature circuit breaker for industrial circuit protection.
  • 12 A rated current for electrical and control circuits.
  • Curve D tripping characteristic suitable for loads with higher transient inrush currents.
  • 277 V AC UL rated operational voltage.
  • 10 kA short-circuit rating for robust fault protection.
  • UL489 compliant for branch circuit protection applications.

Key Features

  • Lovato P1 MB miniature circuit breaker series.
  • 1-pole configuration.
  • 12 A rated current.
  • Curve D tripping characteristic.
  • 277 V AC operational voltage under UL.
  • 10 kA short-circuit rating.
  • 440 V rated insulation voltage Ui.
  • 4 kV rated impulse withstand voltage Uimp.
  • Thermal-magnetic overload and short-circuit protection.
  • Standard 35 mm DIN rail mounting.

Reliable UL489 Branch Circuit Protection

Miniature circuit breakers such as the Lovato P1MBUH1PD12 automatically interrupt a circuit when excessive current results from an overload or short circuit. The thermal-magnetic operating mechanism combines thermal overload protection with rapid magnetic operation during severe fault-current conditions, helping protect conductors and connected electrical equipment.

The P1MBUH1PD12 combines UL489 branch circuit protection with a Curve D characteristic, making it particularly useful for loads with elevated starting or transient currents. Its 12 A rating, 277 V AC UL operational voltage and 10 kA short-circuit rating make it a practical protection device for industrial machinery, automation and control systems.

Typical Applications

  • Industrial electrical control panels.
  • UL489 branch circuit protection.
  • Industrial machinery and automation equipment.
  • Transformer and power supply circuits.
  • Loads with higher transient inrush currents.
  • OEM electrical control and distribution systems.

Technical Specifications

Phase Single Phase
HS Code 85362010
Manufacturer Lovato Electric
Series P1 MB
Model P1MBUH1PD12
Product type Miniature circuit breaker (MCB)
Number of poles 1P
Number of DIN modules 1
Rated current In 12 A
Tripping curve D
Rated operational voltage AC (UL) 277 V AC
Rated operational voltage AC (IEC) 230/400 V AC
Rated operational voltage DC 60 V DC
Rated frequency 50/60 Hz
Rated insulation voltage Ui 440 V
Rated impulse withstand voltage Uimp 4 kV
Short-circuit rating 10 kA
Electrical life 10,000 cycles
Mechanical life 20,000 cycles
Operating temperature -40 to +70 °C
Storage temperature -40 to +80 °C
Maximum altitude 2000 m
Conductor section 1–35 mm²
Conductor size 14–6 AWG
Terminal tightening torque 1.8–2 Nm
Terminal tool PZ2
Protection rating IP20 from front
Pollution degree 2
Mounting type 35 mm DIN rail
Compliance UL489
Poles 1-pole
Device Type MCB
Trip Curve D curve

Frequently Asked Questions

What is the Lovato P1MBUH1PD12 used for?

The P1MBUH1PD12 is a single-pole miniature circuit breaker designed to provide thermal-magnetic overload and short-circuit protection for industrial electrical circuits, including UL489 branch circuit applications.

What is the current rating of the P1MBUH1PD12?

The Lovato P1MBUH1PD12 has a rated current of 12 A.

What voltage is the Lovato P1MBUH1PD12 rated for?

The P1MBUH1PD12 has a UL rated operational voltage of 277 V AC and is designed for industrial branch circuit protection applications.

What is the breaking capacity of the Lovato P1MBUH1PD12?

The P1MBUH1PD12 has a short-circuit rating of 10 kA, providing robust protection under high fault-current conditions.

What does the Curve D characteristic of the P1MBUH1PD12 mean?

The Curve D tripping characteristic is suited to circuits with relatively high transient inrush currents, such as certain transformers, solenoids and power supplies, while maintaining effective overload and short-circuit protection.

Reliable Protection for Industrial Electrical Systems

Lovato P1 MB miniature circuit breakers provide compact thermal-magnetic protection for industrial electrical systems, combining dependable overload and short-circuit protection with straightforward DIN rail installation and recognised UL compliance.

● 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...