Chint NB2LE 18mm RCBO (SAA Certified)

Rated Frequency:50/60hz
Type:Residual Current
BCD Curve:C
Brand Name:Chint
Place of Origin:China
Model Number:NB2LE
Breaking Capacity:6kA
Width:Single Module 18mm
Breacking Capacity:6kA
Poles Number:Twin

SKU: 10000007599642 Category: Chint RCCB RCBO

Where to Use NB2LE?

The Chint NB2LE 18mm RCBO (SAA Certified) is a Residual Current Circuit Breaker with Overcurrent Protection (RCBO) designed for leakage protection and personal safety in residential electrical panels, commercial buildings, wet locations (bathrooms, kitchens), outdoor power supplies, and anywhere personal protection is critical. This RCBO combines residual current protection (leakage detection) with overcurrent protection (overload/short-circuit) in a single device, saving space in distribution boards while providing comprehensive circuit protection. The single-module (18mm) design makes it ideal for space-constrained panels where standard width devices won't fit.

Why Choose NB2LE Series?

Personal Safety Protection - Detects dangerous leakage currents before they cause electric shock
Type AC (pure AC) - Standard AC detection (cost-effective for basic residential applications)
High Sensitivity Options - 30mA / 100mA / 300mA trip settings for different protection levels
Fast Response Time - Trips within 30ms when leakage is detected, well below dangerous exposure times
Dual Protection in One - RCBO combines RCD + MCB functions, reducing panel space by 50%
Ultra-Compact Design - Single 18mm module width saves valuable DIN rail space
IEC 61008/61009 Certified - Complies with international residual current device standards
Chint Original Quality - CE, SAA, CCC approved with 2-year warranty

Sensitivity (Trip Current) Selection Guide

Choose the right sensitivity level for your application:

Sensitivity	Application	Typical Use
10mA / 30mA	Personal Protection	Bathrooms, kitchens, outdoor sockets, medical locations - where human contact risk is highest
100mA	Fire Protection / Indirect Contact	General distribution circuits, sub-panels, areas with indirect contact risk
300mA	Equipment / Fire Protection	Main incoming protection, large installations, industrial equipment protection

Type AC vs Type A vs Type B - Which One?

Type	Detects	When to Use
Type AC	Pure AC only	Basic residential with standard resistive loads (heaters, incandescent lights). Most economical.
Type A (Recommended)	AC + Pulsating DC	Modern homes with electronic loads: washing machines, LED drivers, variable speed tools, computers. Recommended for new installations.
Type B	AC + All DC (incl. smooth)	Solar PV systems, EV charging, VFDs, medical equipment, DC-powered installations. Required for DC applications.

Technical Specifications

Parameter	Specification
Model Series	NB2LE
Device Type	RCBO (RCD + MCB)
Rated Current	6A - 125A
Pole Configuration	2P / 4P
Residual Sensitivity	30mA / 100mA / 300mA
Detection Type	Type AC (pure AC)
Trip Time	≤30ms at rated residual current
Standard	IEC 61008 (RCCB) / IEC 61009 (RCBO)

Frequently Asked Questions

Q: What is the difference between RCCB and RCBO?

A: RCCB (Residual Current Circuit Breaker) provides only leakage protection - it detects earth faults and disconnects power but doesn't protect against overloads or short circuits. RCBO (Residual Current Breaker with Overcurrent protection) combines RCD + MCB in one device - it protects against leakage AND overcurrent/overload/short-circuit. RCBO saves space in distribution boards and provides complete protection.

Q: 30mA vs 300mA - which sensitivity should I choose?

A: 30mA (or 10mA) is required for personal protection in locations with high shock risk (bathrooms, kitchens, outdoor power, medical facilities). This level protects humans from fatal electric shock. 300mA is used for equipment and fire protection on main incoming circuits - it prevents fires from insulation faults but won't protect against direct contact. Never use 300mA for socket outlet circuits where people may touch appliances.

Q: Do I need Type A or is Type AC sufficient?

A: For new installations, always choose Type A. Modern appliances (washing machines, LED lights, computers, variable speed tools) generate pulsating DC leakage currents that Type AC cannot detect. Type A provides better safety and is now required by updated electrical codes in many countries. Type AC is only suitable for basic installations with purely resistive loads (heaters, incandescent bulbs) and should be considered legacy technology.

Need Help Selecting RCCB/RCBO? Our electrical engineers can advise on the right sensitivity, type, and rating for your installation. Contact us at sales@sntelec.com or WhatsApp +86-18019187010.

Description
Additional information

Description

Chint NB2LE Single module 1P+N 18mm 6kA CE Semko SAA certified 6A 10A 16A 20A 25A 32A 40A Type A or AC CHNT RCBO Circuit Beaker

Chint NB2LE residual current operated circuit breakers (RCBO) are suitable for lines with AC 50/60Hz, rated voltage 240V, rated current up to 40A and for purposes of residual current protection, overload and short circuit protection. When any personal electric shock occurs or the circuit leakage current exceeds the predetermined value, the residual current operated circuit breaker can automatically cut off the power supply in a very short period of time, so that the safety of persons and electrical equipment can be protected. The residual current operated circuit breaker can be used for infrequent conversion of lines under normal conditions, and applied under occasions such as industrial, and commercial, high-rise buildings and residential houses.