Bộ ngắt mạch nhỏ PXB6-40
Bộ ngắt mạch nhỏ CHAC PXB6-40 cung cấp khả năng bảo vệ quá tải và ngắn mạch cùng lúc với việc ngắt pha và pha trung tính. Thiết kế nhỏ gọn 1P+N của nó có khả năng bảo vệ từ 6–40A ở điện áp 230/240V AC, với các đường cong B/C/D để lựa chọn theo đặc tính tải.
Giới thiệu sản phẩm
The CHAC PXB6-40 is a 1P+N miniature circuit breaker for single-phase AC final circuits. It combines overload and short-circuit protection with linked phase and neutral disconnection. The available ratings are 6, 10, 16, 20, 25, 32 and 40A at 230/240V AC, 50/60Hz, with B, C or D tripping characteristics.
For distributors, panel builders and electrical brands, the ordering decision starts with the circuit requirements: current rating, trip curve, available fault current and the required neutral-switching arrangement. This 4.5kA MCB should be specified only where the prospective short-circuit current is within its published rating, unless an applicable coordinated combination has been verified.
The PXB6-40 is an overcurrent protective device. It does not provide residual-current protection; where the circuit requires that function, select a suitable RCBO or a coordinated RCD arrangement. Its published standard references are IEC 60898-1 and GB/T 10963.1. Request the documents applicable to the ordered model and destination market before approval.
Tính năng chính
Các ứng dụng điển hình
Consider the PXB6-40 for single-phase lighting, socket-outlet and equipment branch circuits in residential or commercial distribution assemblies where the design calls for linked phase and neutral disconnection. Suitability depends on conductor sizing, load behavior, supply arrangement, fault level and local rules. Do not treat the AC rating as a DC rating, or select D curve solely to suppress repeated trips without checking the underlying load and fault conditions.
Hướng dẫn đăng ký và tuyển chọn
| Selection item | What to check | PXB6-40 specification |
|---|---|---|
| Độ dòng định mức | Match the design current to conductor ampacity after accounting for installation method, temperature and grouping. | 6/10/16/20/25/32/40A |
| Supply and poles | Confirm the single-phase supply and whether phase and neutral must disconnect together. Follow the marked terminals and project drawing. | 1P+N; 230/240V AC; 50/60Hz |
| Tripping characteristic | Compare normal inrush with the magnetic-trip range, then check that fault current permits the required disconnection time. | B: 3–5 × In; C: 5–10 × In; D: 10–20 × In |
| Khả năng phá vỡ | Check the prospective short-circuit current at the installation point. A higher upstream rating alone does not prove backup protection. | 4.5kA; Icn = Ics = 4500A |
| Chống dòng điện còn lại | Check the project requirements separately. Linked neutral switching does not detect leakage current. | MCB only; use a suitable RCBO or RCD arrangement where required |
| Panel fit and documents | Confirm dimensions, terminal requirements, busbar arrangement and market documentation for the exact order. | Use the PXB6-40 drawings and approved installation data below |
Compare breaking capacity, tripping curves, pole configurations and protection functions before selecting the right miniature circuit breaker for your application.
Check whether 4.5kA meets the fault level
The PXB6-40 has a 4.5kA rating. Use the project fault-current calculation to decide whether this is sufficient or a higher-rated device is needed.
Match B, C or D curve to the circuit
A higher magnetic threshold may accommodate inrush, but the available fault current must still allow timely operation.
Confirm the neutral-switching arrangement
1P+N and 2P are different configuration descriptions. Check which conductors are switched and protected before specifying a substitute.
Decide whether the circuit needs an RCBO
The PXB6-40 protects against overcurrent. An RCBO also provides residual-current protection, subject to its type and sensitivity.
Need Help Selecting an MCB Configuration?
Share your rated current, tripping curve, circuit requirements and quantity. Our team will help confirm a suitable PXB6-40 configuration.
How to Specify a PXB6-40 Order
Give CHAC the configuration and project details together so the quotation can identify the exact device and document requirements.
| Order detail | Information to provide |
|---|---|
| Model and pole arrangement | PXB6-40; 1P+N |
| Độ dòng định mức | Specify one of 6, 10, 16, 20, 25, 32 or 40A |
| Đường cong chuyến đi | Specify B, C or D; include the load or inrush information if selection support is needed |
| Project conditions | 230/240V AC supply, prospective short-circuit current, panel layout and destination market |
| Commercial requirements | Quantity, sample request, branding artwork, packaging language and required documents |
Example order format: PXB6-40 · 1P+N · C16A · quantity required. The example illustrates the format; the selected rating and curve must be approved for the circuit.
Check Panel Fit and Installation Requirements
How to Choose Between B, C and D Curves
The PXB6-40 tripping table gives instantaneous test boundaries of 3–5 × In for B curve, 5–10 × In for C curve and 10–20 × In for D curve. B may suit lower-inrush circuits, while C or D may be considered where starting current is higher. These are selection starting points, not fixed assignments to an appliance type. Confirm both normal transients and fault-loop conditions. The table uses a 30°C reference temperature; obtain model-specific derating guidance for other installation conditions.
When to Specify the 1P+N Arrangement
The PXB6-40 is offered in a 1P+N configuration with simultaneous phase and neutral disconnection. A switched neutral should not be assumed to be an independently overcurrent-protected pole. Confirm the device markings and wiring diagram, and follow the supply-system and local requirements for neutral switching. Do not substitute two unrelated single-pole devices for linked operation.
When a 4.5kA MCB Is Not Enough
The 4.5kA rating is the published short-circuit breaking capacity, not a 4500A continuous-current rating. If the installation fault level exceeds 4.5kA, specify a suitable higher-rated product or an explicitly verified coordinated combination. Merely fitting a larger upstream breaker does not establish that the PXB6-40 can be used above its standalone rating.
Đặc điểm kỹ thuật
| Tham số | |
| Điện áp định mức (V) | 230/240V |
| Rated Insulation Voltage (Ui) | 400V |
| Rated Impulse Withstand Voltage (Uimp) | 4000V |
| Rated Current (In) | 6、10、16、20、25、32、40 |
| Tần số được đánh giá | 50/60Hz |
| Số lượng người Ba Lan | 1P+N |
| Rated Short-Circuit Breaking Capacity (Icn = Ics) | 4500A |
| Mechanical Endurance | ≥10000 |
| Electrical Endurance | ≥4000 |
| Instantaneous Tripping Type | B、C、D |
| Grid Spacing | 50mm |
| Degree of Protection | IP 20 |
| Standards Compliance | IEC60898-1，GB/T 10963.1 |
| Chứng nhận | CE·CB·CCC | DEKRA Certified |
Tripping Characteristics (Reference Temperature: 30℃)
| Item | Tripping Curve | Test Current (A) | Initial Status | Time limit for tripping or non-tripping | Expected result | Remarks |
| a | B,C,D | 1.13ln | Cold | t ≤ 1h | Non-tripping | Current smoothly rises to specified value within 5s |
| b | B,C,D | 1.45ln | Following item a test | t < 1h | Tripping | |
| c | B,C,D | 2.55ln | Cold | 1s < t < 60s (ln ≤ 32A) | Tripping | |
| 1s < t < 120s (ln >32A) | ||||||
| d | B | 3ln | Cold | t ≤ 0.1s | Non-tripping | Switch on the power supply by closing the auxiliary switch |
| C | 5ln | |||||
| D | 10ln | |||||
| e | B | 5ln | Cold | t < 0.1s | Tripping | Switch on the power supply by closing the auxiliary switch |
| C | 10ln | |||||
| D | 20ln |
Note: The term “cold” means that the test is carried out at a reference calibration temperature without load before the test.
Conductor requirements and cross section
| Copper cross-section(mm2) | Rated current ln(A) |
| 1 | ln≤6 |
| 1.5 | 6 < ln≤13 |
| 2.5 | 13 < ln≤20 |
| 4 | 20 < ln≤25 |
| 6 | 25 < ln≤32 |
| 10 | 32 < ln≤40 |
Tên loại
Các đường cong khi va chạm
Kích thước (mm)
Tại sao nên chọn CHAC
CHAC Electric supplies low-voltage circuit-protection products for electrical brands, importers and distributors. For a PXB6-40 order, agree the current and curve configuration, approved sample, required market documents and marking artwork before production. Keep the accepted specification with the purchase order so repeat deliveries can be checked against the same requirements.
01
CONFIRM THE SPECIFICATION
Agree rated current, curve, supply and project fault level.
02
REVIEW THE DOCUMENTS
Confirm model-specific drawings and destination-market requirements.
03
APPROVE THE SAMPLE
Record the accepted configuration and marking requirements.
04
DEFINE ORDER CHECKS
Agree packaging, identification and delivery requirements in the quotation.
Dây chuyền lắp ráp tự động
Phòng thí nghiệm kiểm nghiệm
Xay và dập
Kiểm tra chất lượng
Chúng tôi có thể tùy chỉnh những gì?
PXB6-40 OEM/ODM requests begin with its published 1P+N, 6–40A, B/C/D and 4.5kA platform. Branding, packaging, manuals and other changes are reviewed for technical feasibility, order quantity and destination-market requirements. A request to change the breaking capacity, pole arrangement, terminal design or internal construction requires separate engineering and compliance confirmation.
Logo & Thương hiệu
Submit logo artwork and marking requirements for review against the available print area and mandatory product markings.
Packaging & Manuals
Define carton labels, packaging language, product identification and instruction requirements for the destination market.
Configuration Selection
Specify 1P+N, the required 6–40A rating and B/C/D curve. CHAC will confirm the requested order combination.
Appearance Requests
Housing or handle appearance requests require material, tooling and compliance review before sample approval.
Market Documentation
Request the documents for the exact PXB6-40 configuration. A standard reference does not replace model-specific certification evidence.
Sample Approval
Agree the sample specification, drawing revision and acceptance criteria before confirming a production order.
Technical Documents and Support
PXB6-40 Technical Documents
Request the PXB6-40 datasheet, dimension drawing, terminal instructions and available model-specific market documents.Request Datasheet
Need Technical Documents?
Send your current rating, curve, panel requirements and destination market for configuration and document review.Liên hệ với chúng tôi
PXB6-40 Miniature Circuit Breaker FAQ
What is the difference between a 1-pole MCB and a 2-pole MCB?
A 1-pole MCB switches one conductor, while a linked 2-pole device operates two conductors. Protection arrangements depend on the product. The PXB6-40 uses 1P+N with simultaneous phase and neutral disconnection; it should not be assumed to have two independently protected poles. Check the markings, wiring diagram and local neutral-switching requirements before selecting a replacement.
What is the breaking capacity of an MCB?
Breaking capacity is the prospective short-circuit current the device is rated to interrupt under its stated test conditions. For the PXB6-40, the published value is 4.5kA, with Icn = Ics = 4500A. It is separate from the 6–40A load-current rating. Check the fault level at the installation point; use a suitable alternative or verified coordinated solution if 4.5kA is insufficient.
Which MCB is better, C or B?
Neither curve is universally better. Their instantaneous magnetic-trip thresholds differ: the PXB6-40 data gives B at 3–5 times rated current, C at 5–10 times and D at 10–20 times. Select for the load inrush and available fault current together. A higher threshold is not an automatic upgrade: it may need more fault current to achieve the required disconnection time.
Why use an RCBO instead of an MCB?
Use an appropriate RCBO when the circuit requires residual-current protection as well as overcurrent protection. The PXB6-40 provides overload and short-circuit protection but does not detect earth leakage. Switching the neutral does not add leakage detection. Consider the PXB6Ln-40 RCBO or another suitable arrangement, and confirm the residual-current type and sensitivity required for the circuit.
How do I select the MCB current rating?
Select the current rating from the circuit design current and conductor ampacity, accounting for installation method, temperature, grouping and load behavior. The PXB6-40 offers 6, 10, 16, 20, 25, 32 and 40A. Its 40A model designation does not mean every circuit should use 40A, and a recurring trip should be diagnosed before increasing the rating.
Can an AC MCB be used for DC?
Do not assume that an AC-rated MCB is suitable for DC. The PXB6-40 operating rating published here is 230/240V AC; this page does not establish a DC rating. For a DC project, select a documented DC circuit breaker and verify its voltage, poles, wiring arrangement and breaking capacity for the actual circuit.
Build the Right PXB6-40 Configuration for Your Market
Send us your required current rating, B/C/D curve, 1P+N arrangement, destination market and estimated quantity. CHAC will review the specification and provide the relevant technical documents and commercial proposal.
