LS ELECTRIC ABE404B-4P-400A MCCB

Model Part	Meaning
ABE	Series code, Meta-MEC economy MCCB, thermal-magnetic trip, low breaking capacity (economy type)
40	Frame rating current 400A
4	4 poles (4P), suitable for three-phase four-wire system protection
B	Breaking capacity class B (10kA@AC380V)
400A	Rated operational current 400A, set by plug module

Key Technical Parameters

Item	Specification	Description
Product Type	Economy Molded Case Circuit Breaker (MCCB)	Thermal-magnetic trip, fixed mount
Rated Voltage	AC 600V, Ui 690V	Complies with IEC 60947-2
Rated Frequency	50/60Hz	Universal frequency range
Breaking Capacity	Icu=10kA@AC380V	Class B economy breaking capacity
Trip Type	Fixed thermal-magnetic trip	Overload protection (inverse time) + short-circuit protection (instantaneous)
Rated Insulation Voltage	Ui=690V	Maximum voltage for insulation performance
Mechanical Endurance	8500 operations	Standard operating cycles
Electrical Endurance	1000 operations	Operating cycles at rated current
Mounting Type	Fixed type	Standard 35mm DIN rail or panel mount
Connection	Front connection / Rear connection	Optional for different installations
Applicable Standards	IEC 60947-1/2, EN 60947-1/2	International electrical standards

Series Model List (400AF Frame)

Model	Poles	Breaking Capacity	Rated Current Range
ABE402b	2P	10kA	250A, 300A, 350A, 400A
ABE403b	3P	10kA	250A, 300A, 350A, 400A
ABE404b	4P	10kA	250A, 300A, 350A, 400A
ABS402b	2P	25kA	250A, 300A, 350A, 400A
ABS403b	3P	25kA	250A, 300A, 350A, 400A
ABS404b	4P	25kA	250A, 300A, 350A, 400A
ABH402b	2P	35kA	250A, 300A, 350A, 400A
ABH403b	3P	35kA	250A, 300A, 350A, 400A
ABH404b	4P	35kA	250A, 300A, 350A, 400A

Recommended International Brand Replacements

Brand	Series	Replacement Model	Key Matching Parameters
Schneider	EZD Series	EZD400E4400	4P, 400A, 10kA, thermal-magnetic trip
Siemens	3VT Series	3VT8440-1AA03	4P, 400A, 10kA, thermal-magnetic trip
ABB	Tmax Series	T2N400 TMD 400/400 FF 4P	4P, 400A, 10kA, thermal-magnetic trip
Eaton	Power Defense	LZMN4-A400-I	4P, 400A, 10kA, thermal-magnetic trip
Changshu Switch	CM3 Series	CM3-400M/4300B 400A	4P, 400A, 10kA, thermal-magnetic trip

Applications & Selection Notes
Typical Applications

End protection in low-voltage distribution systems, e.g., lighting and power distribution in commercial buildings and industrial plants

Three-phase asynchronous motor protection (≤200kW, 380V)

Capacitor bank protection

Small generator outlet protection

Selection Guidelines

Confirm system voltage (≤600V) and frequency (50/60Hz)

Calculate circuit rated current to ensure 400A meets long‑term operation

Evaluate short-circuit level: if >10kA, use higher breaking capacity ABS (25kA) or ABH (35kA) series

Consider pole requirement: 4P for neutral protection applications

Confirm mounting (fixed/drawout) and connection direction (front/rear)

Product Features & Advantages
Economical & Practical: ABE series is cost-effective for budget‑limited projects
Standard Design: Complies with IEC standards, interchangeable with other brands
Reliable Protection: Thermal-magnetic trip provides basic overload and short-circuit protection
Flexible Installation: Supports front/rear wiring and multiple mounting methods
Complete Accessories: Can be equipped with auxiliary contacts, alarm contacts, undervoltage release, etc.
Maintenance & Troubleshooting
Regular Inspection: Inspect appearance and tighten terminals quarterly to avoid looseness or overheating
Trip Test: Perform manual trip test annually to verify mechanical reliability
Troubleshooting:

Frequent overload tripping: Check load or replace with higher rated model

Short-circuit tripping: Locate and repair short circuit before closing

Failure to close: Check mechanical jam or replace damaged parts

LS ELECTRIC ABE404B-4P-400A is an economy 4-pole MCCB with 400A rated current and 10kA breaking capacity, suitable for low-voltage distribution systems with moderate breaking requirements. For higher breaking capacity, use ABS (25kA) or ABH (35kA) series.

Applications of LS ELECTRIC ABE404B-4P-400A MCCB

Core Positioning:

This 4-pole economy MCCB (4P, 400A, 10kA) is mainly used for end protection in low‑voltage distribution systems, especially where neutral protection is required, short-circuit current ≤10kA, and budget is limited.

Commercial Building Distribution

Application	Suitability	Selection Tip
Main distribution board main breaker	4P protects 3-phase 4-wire; 400A fits small‑to‑medium commercial buildings	Total load ≤320A (80% duty), short-circuit ≤10kA
Main A/C protection	400A for large central A/C units (≤200kW, 380V)	Match compressor inrush; recommend undervoltage release
Emergency lighting	4P ensures neutral continuity for reliable emergency operation	Use with EPS/UPS; front connection for easy maintenance
Elevator room power	400A for multiple elevators; 4P prevents neutral faults	Install in dedicated cabinet; ensure ventilation

Typical Cases:

3–5 story office buildings, chain supermarkets, hotels as main or important branch breaker.

Industrial Plant Applications
General Machinery

Main breaker for small‑medium production lines: 400A covers multiple branches; 10kA suits general industrial short-circuit levels

Motor group protection: Total power ≤200kW, used with thermal relays for precise protection

Auxiliary equipment: Fans, pumps, compressors; 4P for control circuits with neutral

Specific Industries

Food processing: Cost-effective for light industry; 4P ensures safety and quality

Electronic assembly: 400A for multiple lines; 4P avoids neutral drift affecting precision equipment

Warehouse power: Main breaker for lighting and forklift charging

Warning:

If short-circuit current >10kA, upgrade to LS ABS (25kA) or ABH (35kA).

Public & Residential Buildings
Education & Medical

School main distribution: 4P protects lighting, A/C, computer rooms; 400A for whole building

Community hospital: 4P for medical equipment with neutral; economy for primary care

Stadium auxiliary systems: Lighting, audio, seats; 400A for local zones

Infrastructure

Small wastewater treatment: 400A for pumps and blowers; 4P prevents control system failure

Urban landscape lighting: Main breaker for multi-loop lighting with reliable neutral

Small waste transfer station: 400A for compressors and conveyors; low operating cost

Special Applications
Capacitor Bank Protection

For capacitor banks ≤100kvar; 4P prevents inrush and short-circuit during switching

Recommend adding SPD for surge protection

Small Generator Systems

Main breaker for generators ≤300kVA; 4P ensures safe isolation from grid

Used with synchronizing equipment for smooth switch between mains and generator

Temporary Power

Construction site temporary power main breaker; 400A for cranes, welders

4P suitable for harsh site conditions; prevents electric shock from broken neutral

Key Selection & Application Criteria

Factor	Recommended	Not Suitable For
Short-circuit level	≤10kA: suitable; >10kA: use ABS/ABH	High-risk areas (chemical, mining) with >10kA
Load type	Resistive & inductive loads (lighting, motors)	Large rectifiers, arc furnaces, high nonlinear loads
Earthing system	TN-S, TT systems (4P neutral protection)	IT systems (operating rooms, mines)
Environment	Indoor dry, ≤40°C	Outdoor, damp, explosive areas (needs special enclosure)
Operation frequency	Infrequent operation (≤12/day)	Frequent duty (cranes, elevator main circuits)

Application Advantages
Economical: High cost-performance for budget projects
Full protection: 4P design covers 3-phase + neutral for modern distribution
Standard compliance: IEC 60947-2, interchangeable with major brands
Flexible installation: Front/rear wiring + 35mm DIN rail
Reliable: Mechanical 8500, electrical 1000 operations

Best Combination:

Use ABE404B-4P-400A as main breaker + LS MCBs for branch protection to form a reliable two‑stage system.

For higher performance or electronic protection, upgrade to ABS (25kA), ABH (35kA), or ABN (electronic trip) series.