Chint NB1-63DC DC MCB
Chint NB1-63DC DC MCB
Chint NB1-63DC DC MCB
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Chint NB1-63DC DC MCB
Chint NB1-63DC DC MCB
Chint NB1-63DC DC MCB
Chint NB1Z-63 AC/DC MCB
Chint NB1Z-63 AC/DC MCB
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CHINT RT28 Cylindrical Fuse Link and Fuse Holder
CHINT RT28 Cylindrical Fuse Link and Fuse Holder

Chint NB1-63DC DC MCB

BCD Curve:C
Type:MCB
Brand Name:Chint
Place of Origin:China
Model Number:NB1-63DC
Breaking Capacity:6kA
Rated Voltage:12 – 1000V DC
Type:Mini
Poles
Rated Voltage
Rated Current
SKU: 1600083330804 Category:
Description

Chint original NB1-63DC DC MCB 1P 2P 4P 1A 2A 3A 4A 6A 10A 13A 16A 25A 32A 40A 50A 63A DC Miniature Circuit Breaker

   
General

1.1 Certificates: CCC,CE,CB,TUV;
1.2 Standard: IEC/EN 60947-2 ,RoHS;
1.3 Rated voltage up to 1000V, Rated current up to 63A;
1.4 Protection of circuits against overload currents;
1.5 Protection of circuits against short-circuit currents;
1.6 NB1-63 DC circuit-breakers are used incommunication systems and PV DC systems.

 

 

Features

2.1 Excellent breaking capacity
2.2 Double connection function of lead wire and bus bar
2.3 Stored energy operation, fast closing, long service life
2.4 Convenient installation, disassembly
2.5 Contact on-off indication, higher security
2.6 Green environmental protection and energy saving

Type Designation

  

Operating Conditions

4.1 Ambient temperature:-35oC~+70°C(Refer to 5.3)
4.2 The atmosphere condition:<95%
4.3 Pollution degree:n
4.4 Altitude:<2000m(if exceed 2000m,Refer to 5.4)

Technique Parameters

5.1 Classification
5.1.1 Rate Current In: 1A,2A(3A,4A(6A,10A,13A,16A,20A(25A(32A,40A,50A(63A
5.1.2 Number of poles: 1R2R4P
5.1.3 Tripping curves: C Type,(7~10)In

5.2 Parameters
5.2.1 Rated breaking capacity Icu

 

Additional information
Weight 0.6 kg
Dimensions 33 × 33 × 33 cm
Rated Current

1A, 2A, 3A, 4A, 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, 63A
Poles

1P, 2P, 4P
Technical Datasheet & Downloads

📄 Technical Documentation & Product Specifications

Download official engineering datasheets, certified test standards (IEC / UL / CE), wiring diagrams, and dimensional drawings for Chint NB1-63DC DC MCB.

📥
Official Technical Datasheet (PDF) Complete electrical ratings, tripping characteristics, dimensions, and compliance specifications.
Request Official Datasheet (PDF)
📐
2D/3D CAD & Dimensional Drawings STEP, DXF, and PDF CAD drawing files for panel builders and switchgear designers.
Request CAD Model
Certified Standards: IEC 60898-1, IEC 60947-2, CE, RoHS, ISO 9001:2015
Manufacturer: Shanghai Newtrend Electric Co., Ltd. (Global Export Compliance)
Engineering Support: 24-hour response for custom voltage ratings, auxiliary contacts, and technical consulting.
Technical FAQ & Selection Guide

💡 Frequently Asked Technical Questions & Selection Guide

Pure engineering specifications, tripping curve parameters, and electrical selection guidance for panel builders and system designers.

Curve Selection

How to choose between Tripping Curves B, C, and D for this miniature circuit breaker?

A

Curve B trips at 3–5 In (designed for resistive loads, electric heating, and domestic appliances with negligible inrush). Curve C trips at 5–10 In (the standard international choice for residential and commercial lighting, socket outlets, and small induction motors). Curve D trips at 10–14 In (specifically engineered for high-inrush inductive equipment such as industrial transformers, heavy motors, compressors, and welding circuits).

Breaking Capacity

How do I determine whether 6kA or 10kA breaking capacity is required for my installation?

A

Breaking capacity (Icn/Icu) must exceed the calculated prospective short-circuit fault current at the installation point. 6kA (IEC 60898-1) is standard for residential consumer units and sub-distribution branch circuits located downstream. 10kA (IEC 60947-2) is required for industrial facilities, main switchboards, commercial distribution panels, or circuits situated close to supply transformers where fault levels are high.

Poles & Neutral Isolation

How to choose the correct number of poles (1P, 1P+N, 2P, 3P, 3P+N, 4P) for single-phase and three-phase circuits?

A

For single-phase 230V circuits: 1P provides active phase protection; 1P+N or 2P isolates both live and neutral lines simultaneously (essential for TT earthing systems and sensitive sub-panels). For three-phase 400V systems: 3P protects balanced 3-wire motor loads; 3P+N or 4P is required for 4-wire mixed single-phase loads to ensure complete neutral disconnection during isolation.

DC vs AC Application

Can this circuit breaker be used in DC circuits (Solar PV, Battery Storage, Telecom)?

A

Standard AC breakers cannot safely extinguish DC arcs due to the absence of natural zero-crossing current. For DC circuits (60V to 1000V DC), select specialized DC breakers (such as DZ158-125 DC or NM8NDC series) equipped with permanent magnetic arc-blowout chutes and strictly observe polarity wiring to prevent arc re-ignition.

Modular Accessories & Interlocks

What modular accessories and mechanical interlocks can be fitted to this breaker?

A

Standard modular clip-on accessories can be mounted directly on the side without tools: OF (Auxiliary Contact for remote status indication), SD (Alarm Contact for trip fault signaling), MX (Shunt Trip for remote emergency tripping), MN (Under-voltage Release for voltage loss protection), and NXBZ mechanical interlock kits for manual generator/mains transfer switches.

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