Lauritz Knudsen DY125U, MCCB, 3 Pole, 415V AC, 10kA Breaking Capacity, 40A | Thermal-Magnetic Release | Long Electrical & Mechanical Life
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Lauritz Knudsen DY125U, MCCB, 3 Pole, 415V AC, 10kA Breaking Capacity, 40A | Thermal-Magnetic Release | Long Electrical & Mechanical Life
- Description
- Specifications
- Documents
- Warranty
- Reviews
Description
About the Product
The Lauritz Knudsen EM90983OOFO from the DY125U series is a compact & economical 3 Pole Moulded Case Circuit Breaker (MCCB) designed to provide dependable circuit protection for residential, small commercial, & light-duty electrical applications. Rated at 40A & 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.
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 small-scale power distribution systems where high fault current interruption ratings are not required. The breaker delivers a practical combination of affordability, safety, & protection performance for everyday electrical installations.
The 3 Pole configuration is intended for three-phase electrical systems commonly used in residential distribution boards, small commercial establishments, utility rooms, workshops, & light-duty electrical installations. Designed for operation at 50/60 Hz, it ensures compatibility with standard electrical networks worldwide.
Manufactured with a compact & lightweight design, the MCCB enables easy installation in electrical panels, distribution boards, switchgear assemblies, & confined spaces where installation flexibility is important. Despite its space-saving construction, the breaker delivers dependable performance & consistent protection for low-load electrical circuits.
The DY125U series is recognized as an economical protection solution, making it particularly suitable for users seeking reliable circuit protection in applications with lower fault levels & limited installation space.
This 40A MCCB is an excellent choice for applications requiring moderate low-current protection, compact installation, dependable safety, & cost-effective operation.
How the Mechanism Works
The product functions by:
• Continuously monitoring electrical current flowing through the circuit
• 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
• Preventing overheating caused by excessive current flow
• Supporting safe & reliable power distribution
• Improving electrical safety in low-load installations
• Reducing the risk of equipment failure & downtime
It serves as a dependable protection device for residential, commercial, & light-duty electrical systems.
Electrical Configuration
• Product Type: Moulded Case Circuit Breaker (MCCB)
• Model: EM90983OOFO
• Series: DY125U
• Pole Configuration: 3 Pole
• Rated Current: 40A
• Rated Voltage: 415V AC
• Frequency: 50/60 Hz
• Breaking Capacity: 10kA
• Trip Unit Type: Thermal Magnetic
• Mounting Type: Panel Mounted
• Primary Function: Overload & Short-Circuit Protection
• Application: Electrical Distribution & Equipment Protection
Construction & Design
Designed for durability & dependable operation:
• Compact MCCB construction
• Lightweight design for easy handling
• High-strength moulded insulating enclosure
• Precision-engineered operating mechanism
• Thermal-magnetic trip technology
• Durable contact system
• Efficient arc interruption chamber
• Secure terminal connection arrangement
• Space-saving panel design
• Long operational service life
Safety & Protection
• Reliable overload protection
• Instantaneous short-circuit protection
• 10kA fault interruption capability
• Enhanced electrical safety
• Improved protection for connected equipment
• Reduced risk of electrical damage
• Stable & dependable operation
• Consistent power distribution performance
• Economical protection solution
• Reduced maintenance requirements
Mounting & Durability
• Easy installation in compact electrical panels
• Suitable for distribution boards & control panels
• Space-saving footprint for panel integration
• Secure mounting arrangement
• Lightweight & durable construction
• Designed for continuous-duty operation
• Reliable performance in everyday applications
• Resistant to normal electrical stresses
• Long operational lifespan
• Minimal maintenance requirements
Application Domains
• Residential Distribution Panels
• Small Commercial Installations
• Light-Duty Electrical Systems
• Control Panels & Small Equipment
• Low-Load Power Distribution Networks
• Compact Electrical Enclosures
• Utility Electrical Systems
• Small Workshops & Facilities
• Three-Phase Electrical Installations
• General Electrical Protection Applications
Key Features
• Rated current of 40A
• 3 Pole configuration for three-phase systems
• Rated voltage of 415V AC
• Breaking capacity of 10kA
• Thermal-magnetic trip protection
• Reliable overload & short-circuit protection
• Suitable for 50/60 Hz operation
• Compact & lightweight design
• Cost-effective protection solution
• Ideal for low fault-level applications
• Easy panel integration
• Dependable long-term performance
Applications
• Residential electrical distribution systems
• Small commercial installations
• Light-duty electrical panels
• Control panels & small equipment protection
• Compact electrical enclosures
• Low-load power distribution systems
• Utility electrical applications
• Equipment protection circuits
• Three-phase electrical networks
• General-purpose distribution systems
FAQs
1. What is this MCCB used for?
Ans: It is used to protect electrical circuits, wiring, & connected equipment from overload & short-circuit faults in low-load systems.
2. What is the current rating of this MCCB?
Ans: The MCCB has a rated current of 40A.
3. What type of protection does it provide?
Ans: It provides thermal protection against overload conditions & magnetic protection against short-circuit faults.
4. What is the breaking capacity of this MCCB?
Ans: The breaker has a breaking capacity of 10kA for safe interruption of fault currents in low fault-level installations.
5. Where is this MCCB typically used?
Ans: It is commonly used in residential distribution systems, small commercial facilities, & light-duty electrical installations with low fault levels.
6. How does DY125U compare to other MCCB series?
Ans: The DY125U series is an entry-level MCCB range with a 10kA breaking capacity, positioned below higher-performance series such as DU100D (18kA), DU250C (25kA), DU100H (30kA), & DU400N (50kA).
7. Is this MCCB suitable for three-phase systems?
Ans: Yes, the 3 Pole configuration is specifically designed for three-phase electrical applications.
8. What are the advantages of a compact MCCB design?
Ans: A compact design saves panel space, simplifies installation, supports efficient electrical layouts, & makes the breaker ideal for small distribution boards & confined installations.
Overview
| Rated Operational Current (A) | 40A |
|---|---|
| No. of Poles | 3P |
| 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) | 8000 |
| Mechanical Life (Operating Cycles) | 30000 |
| IP Protection | IP40 |
| Pollution Degree | III |
| Width(mm) | 75 |
| 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 EM90983OOFO from the DY125U series is a compact & economical 3 Pole Moulded Case Circuit Breaker (MCCB) designed to provide dependable circuit protection for residential, small commercial, & light-duty electrical applications. Rated at 40A & 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.
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 small-scale power distribution systems where high fault current interruption ratings are not required. The breaker delivers a practical combination of affordability, safety, & protection performance for everyday electrical installations.
The 3 Pole configuration is intended for three-phase electrical systems commonly used in residential distribution boards, small commercial establishments, utility rooms, workshops, & light-duty electrical installations. Designed for operation at 50/60 Hz, it ensures compatibility with standard electrical networks worldwide.
Manufactured with a compact & lightweight design, the MCCB enables easy installation in electrical panels, distribution boards, switchgear assemblies, & confined spaces where installation flexibility is important. Despite its space-saving construction, the breaker delivers dependable performance & consistent protection for low-load electrical circuits.
The DY125U series is recognized as an economical protection solution, making it particularly suitable for users seeking reliable circuit protection in applications with lower fault levels & limited installation space.
This 40A MCCB is an excellent choice for applications requiring moderate low-current protection, compact installation, dependable safety, & cost-effective operation.
How the Mechanism Works
The product functions by:
• Continuously monitoring electrical current flowing through the circuit
• 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
• Preventing overheating caused by excessive current flow
• Supporting safe & reliable power distribution
• Improving electrical safety in low-load installations
• Reducing the risk of equipment failure & downtime
It serves as a dependable protection device for residential, commercial, & light-duty electrical systems.
Electrical Configuration
• Product Type: Moulded Case Circuit Breaker (MCCB)
• Model: EM90983OOFO
• Series: DY125U
• Pole Configuration: 3 Pole
• Rated Current: 40A
• Rated Voltage: 415V AC
• Frequency: 50/60 Hz
• Breaking Capacity: 10kA
• Trip Unit Type: Thermal Magnetic
• Mounting Type: Panel Mounted
• Primary Function: Overload & Short-Circuit Protection
• Application: Electrical Distribution & Equipment Protection
Construction & Design
Designed for durability & dependable operation:
• Compact MCCB construction
• Lightweight design for easy handling
• High-strength moulded insulating enclosure
• Precision-engineered operating mechanism
• Thermal-magnetic trip technology
• Durable contact system
• Efficient arc interruption chamber
• Secure terminal connection arrangement
• Space-saving panel design
• Long operational service life
Safety & Protection
• Reliable overload protection
• Instantaneous short-circuit protection
• 10kA fault interruption capability
• Enhanced electrical safety
• Improved protection for connected equipment
• Reduced risk of electrical damage
• Stable & dependable operation
• Consistent power distribution performance
• Economical protection solution
• Reduced maintenance requirements
Mounting & Durability
• Easy installation in compact electrical panels
• Suitable for distribution boards & control panels
• Space-saving footprint for panel integration
• Secure mounting arrangement
• Lightweight & durable construction
• Designed for continuous-duty operation
• Reliable performance in everyday applications
• Resistant to normal electrical stresses
• Long operational lifespan
• Minimal maintenance requirements
Application Domains
• Residential Distribution Panels
• Small Commercial Installations
• Light-Duty Electrical Systems
• Control Panels & Small Equipment
• Low-Load Power Distribution Networks
• Compact Electrical Enclosures
• Utility Electrical Systems
• Small Workshops & Facilities
• Three-Phase Electrical Installations
• General Electrical Protection Applications
Key Features
• Rated current of 40A
• 3 Pole configuration for three-phase systems
• Rated voltage of 415V AC
• Breaking capacity of 10kA
• Thermal-magnetic trip protection
• Reliable overload & short-circuit protection
• Suitable for 50/60 Hz operation
• Compact & lightweight design
• Cost-effective protection solution
• Ideal for low fault-level applications
• Easy panel integration
• Dependable long-term performance
Applications
• Residential electrical distribution systems
• Small commercial installations
• Light-duty electrical panels
• Control panels & small equipment protection
• Compact electrical enclosures
• Low-load power distribution systems
• Utility electrical applications
• Equipment protection circuits
• Three-phase electrical networks
• General-purpose distribution systems
FAQs
1. What is this MCCB used for?
Ans: It is used to protect electrical circuits, wiring, & connected equipment from overload & short-circuit faults in low-load systems.
2. What is the current rating of this MCCB?
Ans: The MCCB has a rated current of 40A.
3. What type of protection does it provide?
Ans: It provides thermal protection against overload conditions & magnetic protection against short-circuit faults.
4. What is the breaking capacity of this MCCB?
Ans: The breaker has a breaking capacity of 10kA for safe interruption of fault currents in low fault-level installations.
5. Where is this MCCB typically used?
Ans: It is commonly used in residential distribution systems, small commercial facilities, & light-duty electrical installations with low fault levels.
6. How does DY125U compare to other MCCB series?
Ans: The DY125U series is an entry-level MCCB range with a 10kA breaking capacity, positioned below higher-performance series such as DU100D (18kA), DU250C (25kA), DU100H (30kA), & DU400N (50kA).
7. Is this MCCB suitable for three-phase systems?
Ans: Yes, the 3 Pole configuration is specifically designed for three-phase electrical applications.
8. What are the advantages of a compact MCCB design?
Ans: A compact design saves panel space, simplifies installation, supports efficient electrical layouts, & makes the breaker ideal for small distribution boards & confined installations.
Overview
| Rated Operational Current (A) | 40A |
|---|---|
| No. of Poles | 3P |
| 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) | 8000 |
| Mechanical Life (Operating Cycles) | 30000 |
| IP Protection | IP40 |
| Pollution Degree | III |
| Width(mm) | 75 |
| 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.