Lauritz Knudsen DY125U, MCCB, 4 Pole, 415V AC, 10kA Breaking Capacity, 125A | Thermal-Magnetic Release | Long Electrical & Mechanical Life | with Spreader Terminals
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Lauritz Knudsen DY125U, MCCB, 4 Pole, 415V AC, 10kA Breaking Capacity, 125A | Thermal-Magnetic Release | Long Electrical & Mechanical Life | with Spreader Terminals
- Description
- Specifications
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- Warranty
- Reviews
Description
About the Product
The Lauritz Knudsen EM90984OOLO from the DY125U series is a compact & economical 4 Pole Moulded Case Circuit Breaker (MCCB) designed to provide dependable circuit protection & complete circuit isolation for residential, commercial, & light industrial electrical applications. Rated at 125A & 415V AC, this MCCB safeguards electrical circuits, wiring systems, & connected equipment against overloads & short-circuit faults while ensuring reliable operation & enhanced electrical safety.
The breaker incorporates an advanced thermal-magnetic trip mechanism that provides dual protection against electrical abnormalities. The thermal protection element offers time-delayed tripping during overload conditions, helping prevent overheating, insulation degradation, & damage to cables & connected devices caused by prolonged overcurrent situations. The magnetic protection element responds instantaneously to short-circuit faults, rapidly disconnecting the affected circuit & minimizing damage to electrical systems & equipment.
The 4 Pole configuration includes a dedicated neutral pole, enabling simultaneous isolation of all three phases & the neutral conductor. This feature enhances operational safety during maintenance procedures, fault isolation, servicing activities, & emergency shutdowns. Complete phase & neutral isolation is especially valuable in installations where full circuit disconnection is essential for personnel & equipment safety.
With a breaking capacity of 10kA, the DY125U MCCB is specifically designed for installations with low fault levels. This interruption capability makes it an ideal solution for power distribution systems where dependable protection & economical operation are required without the need for higher interruption ratings.
A key advantage of this variant is the inclusion of spreader terminals, which improve cable management & installation flexibility. Spreader terminals allow easier termination of larger or multiple conductors, improve current distribution, & ensure secure electrical connections. This feature enhances installation efficiency, simplifies wiring, & improves long-term electrical reliability, especially within compact switchgear & distribution panels.
Designed for operation at 50/60 Hz, the MCCB ensures compatibility with standard electrical networks worldwide. Its compact & durable construction allows easy integration into distribution boards, switchgear panels, & control systems while maximizing available installation space.
This 125A 4 Pole MCCB with spreader terminals is an excellent choice for applications requiring maximum current capacity within the entry-level range, complete phase & neutral isolation, enhanced connectivity, dependable protection, & cost-effective performance.
How the Mechanism Works
The product functions by:
• Continuously monitoring electrical current flowing through all poles
• Detecting overload conditions using a thermal trip mechanism
• Providing delayed tripping during sustained overcurrent conditions
• Detecting short-circuit faults using a magnetic trip system
• Instantly disconnecting the circuit during fault conditions
• Protecting cables, conductors, & connected equipment from damage
• Isolating all three phases & neutral simultaneously
• Preventing overheating caused by excessive current flow
• Supporting safe & reliable power distribution
• Enhancing wiring flexibility through spreader terminals
It serves as a dependable protection & isolation device for residential, commercial, & light industrial electrical systems.
Electrical Configuration
• Product Type: Moulded Case Circuit Breaker (MCCB)
• Model: EM90984OOLO
• Series: DY125U
• Pole Configuration: 4 Pole
• Rated Current: 125A
• Rated Voltage: 415V AC
• Frequency: 50/60 Hz
• Breaking Capacity: 10kA
• Trip Unit Type: Thermal Magnetic
• Neutral Pole: Included
• Terminal Type: Spreader Terminals Included
• Mounting Type: Panel Mounted
• Primary Function: Overload, Short-Circuit Protection & Circuit Isolation
• Application: Electrical Distribution & Equipment Protection
Construction & Design
Designed for durability & dependable operation:
• Compact MCCB construction
• High-strength moulded insulating enclosure
• Precision-engineered operating mechanism
• Thermal-magnetic trip technology
• Four-pole switching architecture
• Integrated neutral pole design
• Durable contact system
• Efficient arc interruption chamber
• Integrated spreader terminals
• Long operational service life
Safety & Protection
• Reliable overload protection
• Instantaneous short-circuit protection
• Complete phase & neutral isolation
• 10kA fault interruption capability
• Enhanced electrical safety
• Improved protection for connected equipment
• Reduced risk of electrical damage
• Better cable management & connectivity
• Stable & dependable operation
• Cost-effective protection solution
Mounting & Durability
• Easy installation in electrical panels
• Suitable for distribution boards & switchgear systems
• Compact footprint for panel integration
• Secure mounting arrangement
• Durable & robust construction
• Designed for continuous-duty operation
• Reliable performance in everyday applications
• Enhanced wiring flexibility with spreader terminals
• Long operational lifespan
• Minimal maintenance requirements
Application Domains
• Residential & Commercial Electrical Distribution Panels
• Light Industrial Systems
• Switchgear & Control Panels
• Systems Requiring Full Isolation (Phase + Neutral)
• Installations Requiring Flexible Cable Termination
• Medium-Load Power Distribution Systems
• Utility Electrical Installations
• Equipment Protection Systems
• Three-Phase Electrical Systems with Neutral
• General Power Distribution Applications
Key Features
• Rated current of 125A
• 4 Pole configuration (three-phase + neutral)
• Rated voltage of 415V AC
• Breaking capacity of 10kA
• Thermal-magnetic protection for overload & short circuit
• Neutral pole for complete circuit isolation
• Supplied with spreader terminals for enhanced connectivity
• Improved cable termination & current distribution
• Suitable for 50/60 Hz operation
• Compact & durable construction
• Cost-effective protection solution
• Reliable performance in low fault-level systems
Applications
• Residential & commercial electrical distribution panels
• Light industrial systems
• Switchgear & control panels
• Systems requiring full isolation (phase + neutral)
• Installations requiring flexible cable termination
• Medium-load power distribution systems
• Distribution boards & panel assemblies
• Utility electrical systems
• Equipment & machinery protection
• Three-phase power distribution networks
FAQs
1. What is the purpose of a 4 Pole MCCB?
Ans: It protects all three phases & includes a neutral pole, enabling complete circuit isolation for improved safety & maintenance.
2. What is the advantage of spreader terminals?
Ans: Spreader terminals allow easier connection of multiple or larger cables, improving installation flexibility, current distribution, & electrical reliability.
3. What is the current rating of this MCCB?
Ans: The MCCB has a rated current of 125A.
4. What type of protection does it provide?
Ans: It provides thermal protection against overload conditions & magnetic protection against short-circuit faults.
5. What is the breaking capacity of this MCCB?
Ans: The breaker has a breaking capacity of 10kA, suitable for low fault-level applications.
6. Where is this MCCB typically used?
Ans: It is commonly used in residential, commercial, & light industrial systems requiring complete phase & neutral isolation along with flexible cable connection capabilities.
7. Why is neutral isolation important?
Ans: Neutral isolation ensures complete circuit disconnection during maintenance, servicing, & emergency shutdowns, improving overall electrical safety.
8. How does this differ from a standard DY125U MCCB?
Ans: This variant includes spreader terminals, providing enhanced cable connection flexibility, easier installation, improved cable management, & better current distribution compared to standard terminal configurations.
Overview
| Rated Operational Current (A) | 125A |
|---|---|
| No. of Poles | 4P |
| Rated Operational voltage (Ue) | 415V AC |
| Rated Insulation Voltage Ui (V) | 800 V |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Operational Frequency (Hz) | 50/60 Hz |
| Release Type | Thermal Magnetic |
| Rated Short Circuit Breaking capacity Icu(kA) | 10kA |
| Rated Sevice circuit breaking capacity (Ics as % of Icu) @415VAC | 100% |
| Ambient temperature | -5°C to 55°C |
| Conformance to Standards | IS 60947-2, IEC 60947-2 & EN 60947-2 |
| Suitable for isolation | Yes |
| Load-line bias | No |
| Electrical Life (Operating Cycles) | 5000 |
| Mechanical Life (Operating Cycles) | 30000 |
| IP Protection | IP40 |
| Pollution Degree | III |
| Width(mm) | 100 |
| Height(mm) | 130 |
| Depth(mm) | 60 |
| Discount Percentage | Between 0-10 % |
Warranty
- All products listed in the price list are covered by a warranty against manufacturing defects for a period of 18* months from the date of purchase.
- For Lauritz Knudsen MCBs & Isolators mounted inside Lauritz Knudsen Distribution Boards, an extended warranty of 5 years is provided.
- In the event of a defect due to faulty workmanship or other associated reasons, the manufacturer will, at its discretion, remedy the defect or replace the faulty parts or the entire product as soon as possible, free of cost.
- This warranty is subject to proper usage and efficient maintenance and does not cover defects arising from fire, accidents, inefficient maintenance, faulty operation, or deliberate or accidental damage.
- The warranty does not cover damage to power electronic components such as thyristors & IGBTs, which primarily fail due to over-temperature or over-voltage. Users must take adequate precautions to eliminate such conditions.
- The manufacturer shall not be responsible or liable for any special, incidental, social, or consequential losses (including loss of profits), punitive damages, injury, or damages of any kind solely attributable to defect or failure of its products.
- The manufacturer shall not be liable in any manner for issues related to or failure in the performance of any other equipment to which the product is connected.
Reviews
Description
About the Product
The Lauritz Knudsen EM90984OOLO from the DY125U series is a compact & economical 4 Pole Moulded Case Circuit Breaker (MCCB) designed to provide dependable circuit protection & complete circuit isolation for residential, commercial, & light industrial electrical applications. Rated at 125A & 415V AC, this MCCB safeguards electrical circuits, wiring systems, & connected equipment against overloads & short-circuit faults while ensuring reliable operation & enhanced electrical safety.
The breaker incorporates an advanced thermal-magnetic trip mechanism that provides dual protection against electrical abnormalities. The thermal protection element offers time-delayed tripping during overload conditions, helping prevent overheating, insulation degradation, & damage to cables & connected devices caused by prolonged overcurrent situations. The magnetic protection element responds instantaneously to short-circuit faults, rapidly disconnecting the affected circuit & minimizing damage to electrical systems & equipment.
The 4 Pole configuration includes a dedicated neutral pole, enabling simultaneous isolation of all three phases & the neutral conductor. This feature enhances operational safety during maintenance procedures, fault isolation, servicing activities, & emergency shutdowns. Complete phase & neutral isolation is especially valuable in installations where full circuit disconnection is essential for personnel & equipment safety.
With a breaking capacity of 10kA, the DY125U MCCB is specifically designed for installations with low fault levels. This interruption capability makes it an ideal solution for power distribution systems where dependable protection & economical operation are required without the need for higher interruption ratings.
A key advantage of this variant is the inclusion of spreader terminals, which improve cable management & installation flexibility. Spreader terminals allow easier termination of larger or multiple conductors, improve current distribution, & ensure secure electrical connections. This feature enhances installation efficiency, simplifies wiring, & improves long-term electrical reliability, especially within compact switchgear & distribution panels.
Designed for operation at 50/60 Hz, the MCCB ensures compatibility with standard electrical networks worldwide. Its compact & durable construction allows easy integration into distribution boards, switchgear panels, & control systems while maximizing available installation space.
This 125A 4 Pole MCCB with spreader terminals is an excellent choice for applications requiring maximum current capacity within the entry-level range, complete phase & neutral isolation, enhanced connectivity, dependable protection, & cost-effective performance.
How the Mechanism Works
The product functions by:
• Continuously monitoring electrical current flowing through all poles
• Detecting overload conditions using a thermal trip mechanism
• Providing delayed tripping during sustained overcurrent conditions
• Detecting short-circuit faults using a magnetic trip system
• Instantly disconnecting the circuit during fault conditions
• Protecting cables, conductors, & connected equipment from damage
• Isolating all three phases & neutral simultaneously
• Preventing overheating caused by excessive current flow
• Supporting safe & reliable power distribution
• Enhancing wiring flexibility through spreader terminals
It serves as a dependable protection & isolation device for residential, commercial, & light industrial electrical systems.
Electrical Configuration
• Product Type: Moulded Case Circuit Breaker (MCCB)
• Model: EM90984OOLO
• Series: DY125U
• Pole Configuration: 4 Pole
• Rated Current: 125A
• Rated Voltage: 415V AC
• Frequency: 50/60 Hz
• Breaking Capacity: 10kA
• Trip Unit Type: Thermal Magnetic
• Neutral Pole: Included
• Terminal Type: Spreader Terminals Included
• Mounting Type: Panel Mounted
• Primary Function: Overload, Short-Circuit Protection & Circuit Isolation
• Application: Electrical Distribution & Equipment Protection
Construction & Design
Designed for durability & dependable operation:
• Compact MCCB construction
• High-strength moulded insulating enclosure
• Precision-engineered operating mechanism
• Thermal-magnetic trip technology
• Four-pole switching architecture
• Integrated neutral pole design
• Durable contact system
• Efficient arc interruption chamber
• Integrated spreader terminals
• Long operational service life
Safety & Protection
• Reliable overload protection
• Instantaneous short-circuit protection
• Complete phase & neutral isolation
• 10kA fault interruption capability
• Enhanced electrical safety
• Improved protection for connected equipment
• Reduced risk of electrical damage
• Better cable management & connectivity
• Stable & dependable operation
• Cost-effective protection solution
Mounting & Durability
• Easy installation in electrical panels
• Suitable for distribution boards & switchgear systems
• Compact footprint for panel integration
• Secure mounting arrangement
• Durable & robust construction
• Designed for continuous-duty operation
• Reliable performance in everyday applications
• Enhanced wiring flexibility with spreader terminals
• Long operational lifespan
• Minimal maintenance requirements
Application Domains
• Residential & Commercial Electrical Distribution Panels
• Light Industrial Systems
• Switchgear & Control Panels
• Systems Requiring Full Isolation (Phase + Neutral)
• Installations Requiring Flexible Cable Termination
• Medium-Load Power Distribution Systems
• Utility Electrical Installations
• Equipment Protection Systems
• Three-Phase Electrical Systems with Neutral
• General Power Distribution Applications
Key Features
• Rated current of 125A
• 4 Pole configuration (three-phase + neutral)
• Rated voltage of 415V AC
• Breaking capacity of 10kA
• Thermal-magnetic protection for overload & short circuit
• Neutral pole for complete circuit isolation
• Supplied with spreader terminals for enhanced connectivity
• Improved cable termination & current distribution
• Suitable for 50/60 Hz operation
• Compact & durable construction
• Cost-effective protection solution
• Reliable performance in low fault-level systems
Applications
• Residential & commercial electrical distribution panels
• Light industrial systems
• Switchgear & control panels
• Systems requiring full isolation (phase + neutral)
• Installations requiring flexible cable termination
• Medium-load power distribution systems
• Distribution boards & panel assemblies
• Utility electrical systems
• Equipment & machinery protection
• Three-phase power distribution networks
FAQs
1. What is the purpose of a 4 Pole MCCB?
Ans: It protects all three phases & includes a neutral pole, enabling complete circuit isolation for improved safety & maintenance.
2. What is the advantage of spreader terminals?
Ans: Spreader terminals allow easier connection of multiple or larger cables, improving installation flexibility, current distribution, & electrical reliability.
3. What is the current rating of this MCCB?
Ans: The MCCB has a rated current of 125A.
4. What type of protection does it provide?
Ans: It provides thermal protection against overload conditions & magnetic protection against short-circuit faults.
5. What is the breaking capacity of this MCCB?
Ans: The breaker has a breaking capacity of 10kA, suitable for low fault-level applications.
6. Where is this MCCB typically used?
Ans: It is commonly used in residential, commercial, & light industrial systems requiring complete phase & neutral isolation along with flexible cable connection capabilities.
7. Why is neutral isolation important?
Ans: Neutral isolation ensures complete circuit disconnection during maintenance, servicing, & emergency shutdowns, improving overall electrical safety.
8. How does this differ from a standard DY125U MCCB?
Ans: This variant includes spreader terminals, providing enhanced cable connection flexibility, easier installation, improved cable management, & better current distribution compared to standard terminal configurations.
Overview
| Rated Operational Current (A) | 125A |
|---|---|
| No. of Poles | 4P |
| Rated Operational voltage (Ue) | 415V AC |
| Rated Insulation Voltage Ui (V) | 800 V |
| Rated impulse withstand voltage (Uimp) | 8 kV |
| Operational Frequency (Hz) | 50/60 Hz |
| Release Type | Thermal Magnetic |
| Rated Short Circuit Breaking capacity Icu(kA) | 10kA |
| Rated Sevice circuit breaking capacity (Ics as % of Icu) @415VAC | 100% |
| Ambient temperature | -5°C to 55°C |
| Conformance to Standards | IS 60947-2, IEC 60947-2 & EN 60947-2 |
| Suitable for isolation | Yes |
| Load-line bias | No |
| Electrical Life (Operating Cycles) | 5000 |
| Mechanical Life (Operating Cycles) | 30000 |
| IP Protection | IP40 |
| Pollution Degree | III |
| Width(mm) | 100 |
| Height(mm) | 130 |
| Depth(mm) | 60 |
| Discount Percentage | Between 0-10 % |
Warranty
- All products listed in the price list are covered by a warranty against manufacturing defects for a period of 18* months from the date of purchase.
- For Lauritz Knudsen MCBs & Isolators mounted inside Lauritz Knudsen Distribution Boards, an extended warranty of 5 years is provided.
- In the event of a defect due to faulty workmanship or other associated reasons, the manufacturer will, at its discretion, remedy the defect or replace the faulty parts or the entire product as soon as possible, free of cost.
- This warranty is subject to proper usage and efficient maintenance and does not cover defects arising from fire, accidents, inefficient maintenance, faulty operation, or deliberate or accidental damage.
- The warranty does not cover damage to power electronic components such as thyristors & IGBTs, which primarily fail due to over-temperature or over-voltage. Users must take adequate precautions to eliminate such conditions.
- The manufacturer shall not be responsible or liable for any special, incidental, social, or consequential losses (including loss of profits), punitive damages, injury, or damages of any kind solely attributable to defect or failure of its products.
- The manufacturer shall not be liable in any manner for issues related to or failure in the performance of any other equipment to which the product is connected.