Standard delivery
£8 ex VAT · free over £200UK 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.
P1MB4PD50 – MINIATURE CIRCUIT BREAKER 4P CURVE D 50A
Lovato P1MB4PD50 four-pole miniature circuit breaker with a 50 A rated current, Type D tripping characteristic and 10 kA short circuit breaking capacity for industrial and commercial circuit protection.
£92.97
Why Choose the Lovato P1MB4PD50 Miniature Circuit Breaker?
The Lovato P1MB4PD50 is a robust 4-pole miniature circuit breaker (MCB) designed to protect electrical circuits against overloads and short circuits in industrial, commercial and OEM installations. As part of the established Lovato P1MB modular protection range, it combines dependable thermal-magnetic operation with a compact DIN rail mounted design for integration into electrical distribution boards and control panels.
Featuring a 50 A rated current, a D tripping characteristic and a 10 kA short circuit breaking capacity, the P1MB4PD50 is particularly suitable for circuits supplying equipment with high starting or inrush currents. This makes it a practical protection device for appropriately designed motor, transformer, solenoid and inductive-load circuits where brief current surges may occur during energisation.
With a 4-pole configuration, 230/400 V AC rated operational voltage and compact four-module construction, the P1MB4PD50 provides simultaneous switching and protection across four conductors. Its durable construction and recognised international conformity make it suitable for machinery, automation systems and demanding low-voltage distribution applications.
Key Advantages
- Dependable 4-pole protection against overloads and short circuits.
- 50 A rated current for higher-load industrial and commercial circuits.
- D tripping characteristic suited to equipment with high inrush currents.
- 10 kA short circuit breaking capacity for reliable fault interruption.
- Compact four-module DIN rail format for efficient panel installation.
- Resettable thermal-magnetic operation helps reduce maintenance after electrical faults.
Key Features
- Lovato P1MB series miniature circuit breaker.
- 4 poles (4P).
- 50 A rated current.
- Type D thermal-magnetic tripping characteristic.
- 10 kA IEC short circuit rating.
- 230/400 V AC rated operational voltage.
- 440 V rated insulation voltage.
- 4 kV rated impulse withstand voltage.
- 50/60 Hz rated frequency.
- Compact four DIN module construction.
Reliable Protection for High-Inrush Electrical Loads
Miniature circuit breakers automatically disconnect an electrical circuit when excessive current is detected. This helps protect cables, control equipment and connected loads against damage caused by sustained overloads or short circuit faults.
The D tripping characteristic allows the P1MB4PD50 to tolerate higher instantaneous starting currents than equivalent Type B or Type C breakers. This makes it suitable for correctly designed circuits supplying motors, transformers and industrial equipment that may draw a brief surge of current when energised.
Typical Applications
- Industrial machinery and automation panels.
- Motor circuits with high starting currents.
- Transformer primary and auxiliary circuits.
- Solenoids and other inductive electrical loads.
- Commercial electrical distribution boards.
- OEM machinery and control systems.
Technical Specifications
Tick the specs you need, then view products that match.
| Current | 50 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 4-pole | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | Lovato Electric | |
| Series | P1MB | |
| Model | P1MB4PD50 | |
| Product type | Miniature circuit breaker (MCB) | |
| Number of poles | 4P | |
| Number of DIN modules | 4 | |
| Rated current | 50 A | |
| Tripping characteristic | D | |
| Short circuit breaking capacity | 10 kA | |
| Current-limiting class | 3 | |
| Rated operational voltage | 230/400 V AC | |
| Maximum rated AC voltage | 400 V AC | |
| Rated insulation voltage (Ui) | 440 V | |
| Rated impulse withstand voltage (Uimp) | 4 kV | |
| Rated frequency | 50 / 60 Hz | |
| Tripping mechanism | Thermal magnetic | |
| Mounting type | 35 mm DIN rail | |
| Terminal type | Screw terminals | |
| Protection rating | IP20 | |
| Electrical life | 10,000 operating cycles | |
| Approximate dimensions (H × W × D) | 86.5 × 80 × 80 mm | |
| Approximate weight | 490 g | |
| Applicable standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 and CSA C22.2 No. 235 | |
| HS Code | 85362010 |
Frequently Asked Questions
What is the Lovato P1MB4PD50 used for?
The P1MB4PD50 protects four-pole electrical circuits against overloads and short circuits, particularly where connected equipment produces high starting or inrush currents.
What is the rated current of the P1MB4PD50?
This miniature circuit breaker has a 50 A rated current.
What does the D tripping characteristic mean?
A Type D characteristic permits relatively high instantaneous inrush currents, making the breaker suitable for correctly designed circuits supplying motors, transformers and other inductive loads.
What is the short circuit breaking capacity?
The Lovato P1MB4PD50 has a 10 kA short circuit breaking capacity.
How is the Lovato P1MB4PD50 installed?
The breaker occupies four DIN modules and mounts onto a standard 35 mm DIN rail inside a compatible electrical enclosure or distribution board.
Trusted by Electrical Professionals Worldwide
Lovato Electric miniature circuit breakers are specified by panel builders, machine manufacturers and electrical contractors for dependable protection, compact installation and consistent performance in industrial electrical systems.
