LS EBS203C-200A-3P MCCB

EBS203C-200A-3P is a 3-pole, 200A rated earth-leakage molded case circuit breaker (MCCB/ELCB) manufactured by LS Electric (formerly LS Industrial Systems / LG Industrial Systems). It provides overcurrent, short-circuit and earth-leakage protection for three-phase electrical circuits.

📌 Model Explanation

EBS203C: EBS series earth-leakage MCCB; 200 = frame size (AF), 3 = number of poles (3P), C = thermal-magnetic trip type (TM).

200A: Rated operational current 200 amperes.

3P: 3 poles, suitable for three-phase three-wire systems.

⚙️ Key Specifications

🛠️ Applications & Compatibility

Typical applications: Industrial power distribution, production line equipment, power and lighting circuits, suitable for three-phase applications requiring reliable earth-leakage and short-circuit protection.

Recommendation: Can be used with Meta-MEC series products for selective protection and coordination to improve system reliability.

🔄 Equivalent & Series Models

Same series: EBS203C-100A/125A/150A/175A, EBS204C (4-pole), etc.

Alternative references: ABB Tmax series, Schneider NSX series, Chint NM8L series and other equivalent earth-leakage MCCBs. Breaking capacity and mounting dimensions must be matched.

📦 Supply & Procurement

Brand: LS Electric (LSIS), originally manufactured in South Korea.

Purchasing channels: Authorized LS Electric distributors in China, industrial platform www.bestcontactor.com. Typical price is around one thousand RMB; negotiable for bulk orders.

The core difference between EBS203C-200A-3P and EBS203C-200A-4P (standard model: EBS204C-200A) lies in the number of poles and the control method of the neutral (N) conductor, which directly affects wiring, protection scope and application scenarios.

1. Structural Differences

EBS203C-200A-3P (3-pole)

Structure: 3 line/incoming terminals, controlling only L1, L2, L3 (three-phase live conductors).

Neutral (N): Does not pass through the breaker; directly connected.

Protection: Provides overload, short-circuit and earth-leakage protection only for three-phase live conductors.

EBS204C-200A-4P (4-pole)

Structure: 4 line/incoming terminals, controlling L1, L2, L3 + N (three-phase live conductors + neutral).

Neutral (N): Passes through the breaker and switches simultaneously with phase conductors.

Protection: Protects three-phase live conductors + neutral and can disconnect a faulty neutral line.

1. Key Parameter Comparison

III. Functional & Safety Differences

1. Switching range

3P: Switches phases only. Neutral remains live, posing electric shock risk during maintenance.

4P: Switches both phases and neutral. Fully isolates power, safer and compliant with standards.

2. Earth-leakage protection effectiveness

3P: Only detects three-phase current imbalance. Cannot protect against neutral faults (e.g., neutral-to-earth short circuit).

4P: Monitors total current of four poles (L1-L2-L3-N), trips on neutral leakage for complete protection.

3. System compatibility

3P: Suitable for pure three-phase loads (motors, pumps) with no single-phase loads and no neutral in the panel.

4P: Suitable for mixed three-phase + single-phase systems (commercial, industrial, building distribution); neutral disconnection required for safety.

1. Selection Guide

Choose 3P (EBS203C):

Loads are pure three-phase motors, compressors, heaters, etc., with no 220V single-phase circuits.

Neutral in the distribution box does not pass through this breaker; space is limited.

Choose 4P (EBS204C):

System is TN-S / TN-C-S (separate N and PE conductors).

Circuit supplies single-phase loads (lighting, sockets, control circuits); neutral must be switched.

Required by safety standards (maintenance, earth-leakage protection, earthing systems).

Summary

3P = space-saving, cost-effective → dedicated for three-phase power

4P = safer, more complete → required for mixed power distribution

LS Electric EBS Series Earth-Leakage MCCBs (ELCB): Model List & Cross-Brand Cross-Reference

1. EBS Series Model System & Full List

Core features of EBS series: Earth-leakage molded case circuit breakers on LS Electric’s (formerly LS / LG Industrial Systems) Metasol platform, with built-in earth-leakage protection modules, providing triple protection against overload, short-circuit and residual current (earth leakage) for low-voltage distribution systems.

1. Model Naming Convention

EBS □□□ – □□□A – □P

EBS: Series code (earth-leakage MCCB)

1st digit: Frame size (5=50AF, 10=100AF, 20=200AF, 40=400AF)

2nd digit: Number of poles (3=3P, 4=4P)

3rd letter: Breaking capacity class (C=standard, S=high)

□□□A: Rated current (In)

□P: Number of poles (3P/4P, consistent with 2nd digit)

2. Complete Model List by Frame Size

1) 50AF Frame (EBS53C / EBS54C)

2) 100AF Frame (EBS103C / EBS104C)

3) 200AF Frame (EBS203C / EBS204C)

4) 400AF Frame (EBS403C / EBS404C)

3. Earth-Leakage Parameters (Whole Series)

Residual operating current (IΔn): 30mA/100mA/300mA/500mA optional (default 30mA for personal protection)

Operating time: ≤0.3s (IΔn=30mA), ≤0.1s (IΔn≥100mA)

Protection type: Type A (AC + pulsating DC leakage), suitable for modern electronic loads

1. Cross-Brand Equivalent Table for EBS Series

Below are equivalent models from major brands with matching core parameters (frame, rated current, poles, breaking capacity) for replacement reference.

Key Notes for Replacement

1. Breaking capacity matching: Select alternatives with breaking capacity ≥ original EBS model to ensure short-circuit protection reliability.
2. Earth-leakage module compatibility:

ABB requires RC221/RC222 earth-leakage accessories

Schneider requires Vigi modules (built-in / add-on)

Domestic NM8L/CDM1L have built-in earth-leakage modules, no extra parts needed

3. Mounting dimension check: Width may vary between brands (e.g., EBS203C-200A-3P: 105mm; Schneider NSX250: 108mm), affecting panel layout.
4. Wiring type: Ensure replacement supports original mounting (fixed / plug-in) and connection (front / rear wiring).

III. Key Differences: EBS203C-200A-3P vs EBS204C-200A-4P

1. Selection & Procurement Advice
2. Pole selection

Pure three-phase power loads (motors, compressors) → choose 3P (EBS203C)

Mixed three-phase + single-phase loads (lighting, sockets) → choose 4P (EBS204C) to meet safety standards

2. Earth-leakage current selection

Personal protection (socket circuits) → IΔn = 30mA

Electrical fire prevention (power/lighting mains) → IΔn = 100mA / 300mA

3. Purchasing channels

Authorized domestic distributors, industrial e-commerce platform www.bestcontactor.com

Regular stock models: EBS53C-50A, EBS103C-100A, EBS203C-200A, EBS403C-400A, etc.