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Email: sale@ufele.com | B2B Supply and OEM Orders
UFELE supplies AC miniature circuit breakers for building distribution boxes, commercial panels, machine control cabinets and electrical wholesale orders. The available range covers 1A to 125A across different series, with 1P, 1P+N, 2P, 3P and 4P options.
A model name alone is not enough for a safe quotation. Send the rated current, system voltage, frequency, pole arrangement, trip curve, breaking capacity and destination market. We will compare those details with the current product file before confirming the model.
Current, pole count, curve and short-circuit rating must agree with the electrical design. Similar-looking breakers are not automatically interchangeable.
UFELE AC breaker series serve different current levels, module widths and short-circuit requirements. Start with the circuit data. Then compare the model family. This order reduces the risk of selecting a familiar housing with the wrong internal rating.
A classic modular MCB family for overload and short-circuit protection in lighting and power distribution circuits. The series covers common distributor ratings and several pole arrangements.
This frame extends the classic AC MCB range to higher current levels. It suits buyers who need 80A, 100A or 125A items within a broader breaker order.
The FMB8 series adds a documented 6kA short-circuit rating in a compact 18 mm module. It is available for several single-phase and three-phase panel arrangements.
The DPN, also called DZ30, places a protected phase and switched neutral in one standard modular width. It is designed for compact single-phase distribution layouts.
DZ47-63K is an updated DZ47 design for residential, commercial and light industrial distribution. Its product file lists a flame-retardant enclosure and common modular pole formats.
A stock order may combine several breaker families, currents and poles. UFELE can review the item matrix, label artwork, barcode plan, inner box and carton marks before production.
This comparison helps narrow the first model choice. It does not replace the electrical design or the approved datasheet. Use the exact product file when the breaker will enter a tender, panel schedule or local approval process.
| Series | Rated Current | Pole Options | AC Voltage / Frequency | Curve | Breaking Capacity |
|---|---|---|---|---|---|
| FMB1-63 / DZ47-63 | 1A–63A | 1P, 2P, 3P, 4P | 230/400V or 240/415V by pole; 50/60Hz | B, C, D | 3kA / 4.5kA by version |
| FMB1-125 / DZ47-125 | 80A, 100A, 125A | Confirm by model | Confirm by current datasheet | Confirm by model | Confirm by model |
| FMB8 | 1A–63A | 1P, 2P, 3P, 4P | 240/400V or 400V by pole; 50/60Hz | B, C, D | 6kA |
| DPN / DZ30 | 6A–32A | 1P+N | AC 240V; 50/60Hz | B, C | 3kA |
| DZ47-63K | 6A–63A | 1P, 2P, 3P, 4P | 220/380V, 230/400V or 240/415V by pole; 50/60Hz | B, C, D | 3kA / 4.5kA by version |
A breaker protects the cable and circuit under defined conditions. It should not be selected from appliance power alone. The design also needs the installation method, ambient conditions, prospective fault current and required disconnection time.
When the panel builder sends these values in one table, our product team can review the series faster and avoid repeated questions.
Pole selection follows the circuit and the required isolation method. The neutral arrangement also depends on the electrical system and local rules. Mark the protected and switched conductors on the panel schedule before placing the order.
A single-pole MCB protects and switches one phase conductor. It is common in permitted single-phase branch circuit arrangements.
The phase pole carries the overcurrent protection while the neutral is switched with it, subject to the exact device design. The DPN format saves panel width.
Two linked poles disconnect together. Confirm whether both poles contain protective elements and how the device is marked for the intended system.
Three-pole breakers serve three-phase circuits. A four-pole device adds neutral switching, while the neutral protection arrangement remains model-specific.
The thermal element handles sustained overloads. The magnetic element responds much faster to high fault current. A curve marking describes the instantaneous trip band as a multiple of rated current, written as In.
Do not choose a curve from the load name alone. The minimum short-circuit current must still operate the breaker within the required time. FMB8 lists B at 3–5In, C at 5–10In and D at 10–20In. Some DZ47 records list a different D range, so the exact datasheet controls the final choice.
The breaker must interrupt the fault current available at its installation point. It must also follow the standard and coordination method used by the project. These checks belong in the electrical design, not only in the purchasing comparison.
The listed UFELE AC MCB families include 3kA, 4.5kA and 6kA versions. The required rating depends on the prospective short-circuit current and the applicable coordination rules.
The listed MCB product files reference IEC or IEC/EN 60898-1. The official IEC description covers circuit breakers for overcurrent protection in household and similar installations for AC operation.
A certificate or test report must match the exact series, current, pole, standard and destination requirement. A document for another housing or rating should not be treated as automatic coverage.
The application changes the selection details. A branch circuit, machine panel and wholesaler stock order may use similar current ratings, but they do not share the same curve, fault level, pole or document requirements.
Branch circuits for lighting, outlets and fixed equipment require coordination between the breaker, cable, load and local wiring rules.
Offices, retail spaces and service panels often need several current ratings and clear circuit identification within one enclosure.
Motors, transformers and control power circuits require extra attention to inrush, trip curve and coordination with downstream equipment.
An AC breaker may protect an air-conditioning power circuit, but the equipment data, conductor size, starting current and installation rules decide the rating.
A mixed MCB order can contain dozens of similar lines. One missing character may change the pole, curve or current. A clean table gives production, label review and warehouse receiving the same reference.
| Order Field | What to Write | Why It Matters |
|---|---|---|
| Series and current | Example: FMB8, 16A | Separates the housing family from the electrical rating. |
| Pole arrangement | 1P, 1P+N, 2P, 3P or 4P | Defines the protected and disconnected conductors. |
| Voltage and frequency | System voltage plus 50Hz or 60Hz | Checks that the product marking matches the circuit. |
| Curve and breaking capacity | B, C or D; required kA rating | Links inrush response and fault interruption to the design. |
| Quantity and packing | Pieces, inner box, carton quantity and carton mark | Prevents mixed-SKU packing and receiving errors. |
| Label and documents | Brand artwork, barcode, manual, datasheet and certificate request | Fixes the approved file set before production and shipment. |
Product marking should show the approved series, current, curve, pole and electrical ratings. Private-label artwork must fit the available print area.
Similar currents and poles should have clear SKU labels. Mixed cartons need an agreed packing list and visible identification.
Keep the quotation, approved label, barcode, carton mark, datasheet revision and packing photos together for the next order.
Use an AC MCB for the stated AC rating. Use a dedicated DC breaker where the circuit and product file require DC interruption. Add RCCB or RCBO protection when residual-current protection is required by the design.
These answers focus on purchasing and model confirmation. Installation and system design should be handled by qualified electrical personnel.
AC means alternating current. The page covers miniature circuit breakers for AC electrical distribution. It is not an air-conditioner repair page, although a correctly selected AC breaker may be used in an HVAC power circuit.
Send the system voltage and frequency, rated current, pole arrangement, required trip curve, breaking capacity, quantity, destination market, label request, packing request and any document requirement. If one value is not known, include the application and panel details for review.
A 1P breaker protects and switches one phase conductor. A 1P+N device protects the phase and switches the neutral with it, subject to the exact product design. A 2P breaker uses two linked poles. Confirm which conductors need protection and disconnection before selecting the device.
Choose the curve from the load inrush current, minimum fault current, cable protection requirement and required disconnection time. B, C and D markings indicate different instantaneous trip ranges, but the exact values must be checked on the model datasheet.
Not by itself. The breaker short-circuit rating must meet or exceed the prospective short-circuit current at the installation point and comply with the applicable design rules. The rating should be selected from the system calculation, not from price or a higher number alone.
Do not use an AC-only breaker on a DC circuit unless the manufacturer documentation specifically gives the required DC rating and connection method. DC fault interruption has different arc behavior. Use a dedicated DC circuit breaker for photovoltaic, battery and other DC circuits.
An MCB provides overload and short-circuit protection. An RCCB responds to residual or leakage current but does not provide overcurrent protection by itself. An RCBO combines residual-current and overcurrent protection in one device.
OEM label and packing support can be reviewed according to the breaker series, quantity, destination market and artwork. Confirm product marking, barcode, inner box, carton mark, manual and document scope before production.
Share the series if known, current, pole, voltage, frequency, curve, breaking capacity, quantity, destination market and OEM requirements. UFELE will review the list against the current model file before quotation.