Miniature Circuit Breakers (MCB)
Compare VIOX MCB series by rated current, pole configuration, breaking capacity and trip curve for low-voltage circuit protection.
Protection functionOverload and short circuit
Pole optionsConfirm by model
Breaking capacityMatch the fault level
Trip curveMatch load behaviour
What is a miniature circuit breaker?
A miniature circuit breaker is a resettable protective device used in low-voltage distribution circuits. It opens the circuit when an overload or short-circuit condition exceeds the device operating characteristics, helping protect conductors and connected equipment.
Selection is not based on current alone. The pole arrangement, circuit voltage, available fault level, trip curve and model documentation must also match the application.
MCB Series Overview
Compare published VIOX models using product data already available on each product page.
VIOX VF003
Miniature circuit breaker- Configuration
- 1P+N
- Rated Current
- 2A–32A
- Breaking Capacity
- 3 / 4.5 / 6kA
VIOX BH
Miniature circuit breaker- Pole Configuration
- 1P, 2P, 3P, 4P
- Rated Current
- 6A–100A
- Breaking Capacity
- 3kA
VIOX BH-P
Miniature circuit breaker- Poles
- 1-4P
VIOX DZ47-63
Miniature circuit breaker- Poles
- 1P
- Rated current
- 63A
- Breaking capacity
- 6KA
VIOX VM1-16
Miniature circuit breaker- Poles
- 1-4P
- Breaking capacity
- 6KA
VIOX VM2-125
Miniature circuit breaker- Poles
- 1-4P
VIOX VM3-63
Miniature circuit breaker- Poles
- 1-4P
- Rated current
- 1-63A
- Breaking capacity
- 6KA
VIOX VM5-63
Miniature circuit breaker- Poles
- 1-4P
- Rated current
- 1-63A
- Breaking capacity
- 6KA
How to choose an MCB
Use these four checkpoints for preliminary comparison, then verify the exact model documentation.
Rated current
Match the device rating to the circuit design, conductor capacity and expected load.
Pole configuration
Confirm the number of protected poles and the required neutral arrangement.
Breaking capacity
Select a model whose rated breaking capacity is suitable for the available fault level.
Trip curve
Match the magnetic response range to the expected inrush behaviour of the load.
B, C and D trip curves
Curve availability varies by product series. Use the model datasheet and the circuit design as the final reference.
Compare published MCB series
Blank cells mean the value is not available in the current product summary. Open the model page or request the matching datasheet before specification.
| Series | Poles | Rated current | Breaking capacity |
|---|---|---|---|
| VIOX VF003 | 1P+N | 2A–32A | 3 / 4.5 / 6kA |
| VIOX BH | 1P, 2P, 3P, 4P | 6A–100A | 3kA |
| VIOX BH-P | 1-4P | — | — |
| VIOX DZ47-63 | 1P | 63A | 6KA |
| VIOX VM1-16 | 1-4P | — | 6KA |
| VIOX VM2-125 | 1-4P | — | — |
| VIOX VM3-63 | 1-4P | 1-63A | 6KA |
| VIOX VM5-63 | 1-4P | 1-63A | 6KA |
MCB applications
Typical low-voltage environments where the correct MCB series may be specified.
Residential Buildings
Branch-circuit protection for lighting, sockets, appliances and household distribution boards.
Industrial Automation
Protection for selected auxiliary, machine and control-panel circuits.
Solar & Energy Storage
AC or DC circuit protection selected for the system voltage, current and pole arrangement.
MCB Knowledge & Selection Guides
All articles
Selection & SizingMCB Buying Checklist: 10 Essential Factors
MCB selection questions
Quick answers for comparing a product family before detailed circuit verification.
What does an MCB protect against?
A miniature circuit breaker opens a circuit when an overload or short-circuit condition exceeds its operating characteristics. The selected device must match the circuit design and applicable product documentation.
Which details should be checked before choosing an MCB?
Confirm the rated current, pole configuration, voltage, breaking capacity and trip curve required by the circuit. Exact options vary by VIOX product series.
What is the difference between B, C and D trip curves?
B, C and D identify different magnetic response ranges for inrush conditions. Availability varies by series, and the final curve should be confirmed against the load and project requirements.
How is an MCB different from an MCCB?
An MCB is a compact modular breaker commonly used for final and branch circuits. An MCCB generally covers higher-current applications and may provide broader protection adjustment options.
Can the same MCB be used for AC and DC circuits?
Not automatically. Use a model whose voltage, poles and AC or DC rating are explicitly suitable for the circuit. Confirm the individual product page or datasheet before specification.
Need the Right MCB?
Let’s Confirm It Together.
Send the circuit type, rated current, pole configuration, quantity and target market. VIOX will review the requirement and help identify the most relevant published series.
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