Chint NL1-63 4P 63A 100mA RCCB – 4 Pole Residual Current Circuit Breaker, AC Type, 100mA Sensitivity, 6kA Withstand for Enhanced Earth Leakage Protection in Three-Phase Systems

Product Code: NL1-63-4P-63A-100mA
Brand: Chint
Product Type: RCCB (Residual Current Circuit Breaker)
Pole Configuration: 4 Pole (4P) – L1, L2, L3, N
Rated Current: 63 Amperes (63A)
Residual Operating Current (Sensitivity): 100mA
Type: AC (detects sinusoidal AC leakage currents)
Short-Circuit Withstand Capacity (Im): 6kA (with backup MCB)
Mounting Type: DIN Rail
Compliance Standard: IEC/EN 61008-1

Product Overview

The Chint NL1-63 4P 63A 100mA RCCB offers intermediate-sensitivity earth leakage protection for three-phase electrical systems. With a 100mA tripping threshold, it’s ideal for equipment and fire-risk protection, especially where 30mA is too sensitive and 300mA not reactive enough.

It features four-pole isolation, disconnecting all three phases and the neutral conductor in the event of a fault, making it suitable for distribution panels, machinery, HVAC systems, and general three-phase loads requiring full protection. The AC-type sensing detects sinusoidal residual currents, which are most common in general-purpose installations.

Key Features

• 🔋 63A Rated Current – Handles medium-to-high load three-phase systems

• ⚠️ 100mA Sensitivity – Offers balance between personnel safety and fire protection

• 🔌 4 Pole Isolation (L1, L2, L3, N) – Ensures complete disconnection on fault detection

• 🌐 AC Type Detection – Senses standard sinusoidal AC leakage currents

• ⚡ 6kA Short-Circuit Withstand – Operates with backup MCB for fault tolerance

• 🧲 DIN Rail Mounting – Fits easily into industrial and commercial panels

• ✅ Certified to IEC/EN 61008-1 – Meets international protection and reliability standards

Technical Specifications

Typical Applications

• Industrial and commercial distribution boards

• Fire protection in critical electrical areas

• Large three-phase machinery and HVAC systems

• Protection for lighting and socket circuits in commercial buildings

• Sensitive electrical systems where 30mA is prone to nuisance tripping

Why Choose Chint NL1-63 4P 63A 100mA RCCB?

The Chint NL1-63 100mA RCCB provides a critical safety balance between shock protection and fire prevention in three-phase environments. Its 100mA sensitivity and 4-pole disconnection make it ideal for installations where standard RCCBs may be too sensitive, yet where leakage protection remains essential.