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PXB2-63 Miniature Circuit Breaker (MCB)
The PXB2-63 Miniature Circuit Breaker ensures robust overload and short-circuit protection with positive isolation, suitable for commercial, industrial, and residential circuits. It features flexible B, C, and D tripping curves for currents from 6A to 63A, accommodating diverse loads. Compliant with IEC60898-1 and GB/T10963.1 standards, it includes CCC certification, 500V insulation voltage, 4000V impulse withstand, and 4500A breaking capacity. Available in 1P to 4P poles for 50/60Hz AC systems, it offers mechanical and electrical endurance over 10,000 cycles. With IP20 protection and 45mm grip for DIN rail mounting, it provides efficient, space-saving installation.
Poles:
1P / 2P / 3P / 4P
Rated Current:
6A–63A
Rated Voltage:
230/400V AC
Breaking Capacity:
4.5kA / 6kA / 10kA
Tripping Curve:
B / C / D
Standard:
IEC 60898-1
Customization:
One-Stop OEM/ODM Service
Core Features and Design
The PXB2-63 is engineered for essential circuit safeguarding, integrating thermal-magnetic tripping for precise overload and short-circuit response. Supporting pole options from 1P to 4P, it handles rated currents including 6A, 10A, 16A, 20A, 25A, 32A, 40A, 50A, and 63A in AC environments. Key parameters include a rated insulation voltage of 500V and impulse withstand of 4000V, enabling operation in low-voltage networks up to 230/400V. The breaker’s short-circuit capacity reaches 4500A (Icn and Ics), with high mechanical durability exceeding 10,000 cycles and matching electrical life for frequent use. Tripping curves—B for resistive applications (3-5In), C for inductive loads (5-10In), and D for high-inrush scenarios (10-20In)—allow optimization for specific setups. Its modular design with 45mm terminal distance ensures compatibility with standard DIN rails, while IP20 enclosure protects against solid intrusions in clean settings.
Tripping Characteristics and Performance
Referenced at 30°C, the PXB2-63 delivers accurate protection: non-tripping at 1.13In for up to 1h (cold start), but activation at 1.45In within 1h following. Magnetic response at 2.55In occurs in 1-60s for ≤32A or 1-120s for >32A, with controlled 5s current rise. Instantaneous limits include non-trip at 3In (B), 5In (C), 10In (D) for ≤0.1s, and trip at 5In (B), 10In (C), 20In (D) under 0.1s via auxiliary activation. This enables effective selectivity in distributed systems. Wiring supports copper conductors from 1mm² (≤6A) to 16mm² (≤63A), with compact per-pole width of about 18mm for panel efficiency.
Applications and Compliance
Versatile for lighting, heating, and distribution in buildings, plants, and homes, the PXB2-63 isolates faults rapidly to avert hazards. It suits pollution degree 2 areas with standard AC voltages. Adhering to IEC60898-1, GB/T10963.1, and CCC requirements, it guarantees safety and interoperability. Ordering specifies model, poles, curve/current (e.g., C/32A), and quantity. This cost-effective breaker minimizes maintenance through durable construction, enhancing reliability in everyday electrical infrastructures. everyday electrical infrastructures.
Tripping curves
Technical Specifications
| Parameter | |
| RatedInsulation Voltage | 500V |
| Rated Impulse Withstand Voltage | 4000V |
| Rated Current(A) | 6,10,16,20,25,32,40,50,63 |
| Rated Frequency | 50Hz/60Hz |
| Number of Poles | 1P,2P,3P,4P |
| Rated Short-Circuit Capacity lcn(A) | 4500A |
| Service Short-Circuit Capacity lcs (A) | 4500A |
| Mechanical and Electrical Endurance (cycles) | Mechanical≥10000,Electrical≥10000 |
| Instantaneous Tripping Types | B,C,D |
| Grip Distance | 45mm |
| Protection Degree | IP20 |
| Standards Compliance | IEC60898-1,GB/T10963.1 |
| Certification | CCC |
Tripping characteristics(Reference temperature 30℃)
| Item | Tripping Curve | Test current In(A) | lnitial Status | Time limit for tripping or non-tripping | Expected result | Remarks |
| a | B,C,D | 1.13In | Cold | t≤1h | Non-tripping | Current smoothly
rises to specified value within 5s |
| b B,C,D 1.45In Following item a test t<1h Tripping |
||||||
| c | B,C,D | 2.55In | Cold | 1s<t<60s(In≤32A) 1s<t<120s(In>32A) | Tripping | |
|
d |
B 3ln |
Cold |
t≤0.1s |
Non-tripping |
Switch on the power supply by closing the auxiliary switch | |
| C | 5In | |||||
| D 10In | ||||||
|
e |
B | 5In |
Cold |
t<0.1s |
Tripping |
Switch on the power supply by closing the auxiliary switch |
| C 10ln | ||||||
| D | 20ln | |||||
Why Choose CHAC
With 30+ years of manufacturing experience, 1100+ employees, 100M+ poles
annual capacity and 90% automated production, CHAC provides stable production capacity and strict
quality control for global OEM/ODM customers. Our in-house manufacturing system supports long-term
cooperation for electrical brands, importers and distributors.
30+
YEARS EXPERIENCE
Specialized in low-voltage electrical manufacturing
1100+
EMPLOYEES
Professional team ensures stable quality and delivery
100M+
POLES ANNUAL CAPACITY
Large-scale production capacity to meet global demand
90%
AUTOMATED PRODUCTION
Advanced automation for high efficiency and consistency
Automated Assembly Line
Testing Laboratory
Injection & Stamping
Quality Inspection
Strict quality control system ensures every product meets global standards.
What Can We Customize?
We support customization across branding, packaging, product appearance,
electrical specifications, certification requirements and engineering development. Whether customers
need private label products, market-specific parameters or new product development, CHAC can provide
flexible solutions based on project requirements.
Logo & Branding
Custom logo printing, laser marking and nameplate solutions.
Packaging
Customization
Customized color boxes, cartons, labels and manuals.
Electrical
Customization
Current, voltage, breaking capacity, trip curve and other
special functions.
Product
Appearance
Housing color, handle color and appearance customization.
Certification
Support
Products comply with international standards and market
requirements.
Engineering
Development
Drawing evaluation, prototype testing and mass production.
Download
CHAC Product Catalog 2026
Complete product overview for low-voltage electrical components and product selection reference.
Need Technical Documents?
Contact us for datasheets, certificates, drawings, selection guidance or OEM/ODM project support.
Frequently Asked Questions
Q1. Do you support product customization based on our design requirements?
A1:Absolutely. We specialize in OEM and ODM cooperation in the low-voltage electrical field and have provided customized services for many internationally renowned companies. We offer full-process support, including R&D design, parameter adjustments, and special material selection, ensuring the product fully meets your requirements.
Q2: What is your production capacity and Minimum Order Quantity (MOQ)?
A2: We operate a highly automated production base with an annual output of over 100 million poles for miniature circuit breakers. Our MOQ policy is flexible. We can provide competitive trial orders for small batches and dedicated production capacity guarantee plans.
Q3: What assurances are there for product quality and certifications?
A3: Our main products are certified with CCC, CE, CB, and more, and are sold in over 30 countries and regions worldwide. The company has established a dedicated Quality Operations Center that works with the business and production departments to implement full-process quality control, ensuring products meet international standards.
Q4: Do you have the capability for product R&D and turning concepts into reality?
A4: We have a complete R&D team and digital workshops, backed by extensive customization experience serving numerous international clients. From concept proposal and sample development to mass production, we provide end-to-end technical support to help bring your ideas to life.
