OMB3-63 4.5kA / 6kA Miniature Circuit Breaker for Flexible project supply
OMB3-63 is a flexible miniature circuit breaker series for low-voltage AC protection where buyers need to balance price, breaking-capacity requirements and regular project availability. The 4.5kA / 6kA positioning makes it suitable for standard electrical distribution, replacement supply and distributor orders that need multiple ratings under one MCB family.
Compared with a single fixed-position MCB page, OMB3-63 should be understood as a practical sourcing option for buyers who want model flexibility. OOHMAGE helps confirm rated current, pole configuration, curve type, breaking-capacity requirement, packaging and destination-market document needs before quotation.
Why Choose OMB3-63
- 4.5kA / 6kA selection: useful when different order lines require different interruption levels.
- Broad current coverage: supports mixed MCB orders for residential and commercial distribution.
- Thermal-magnetic protection: suitable for common overload and short-circuit protection requirements.
- Distributor-friendly ordering: packaging, labeling and model combination can be discussed before order confirmation.
Recommended Applications
Choose OMB3-63 when the project needs a practical MCB range for common low-voltage installations and the buyer wants flexibility between 4.5kA and 6kA options. If the project requires a stronger 10kA option, OMB4-63 may be a better fit.
Specification
| Number of Poles | 1P.2P.3P.4P |
| Rated Current (A) | 1, 2, 3, 4, 5, 6, 8, 10, 13, 16, 20, 25, 32, 40, 50, 63 |
| Rated Operational Voltage | 1P: 240/415V 2P, 3P, 4P: 415V |
| Trip Unit Technology | Thermal-magnetic |
| Curve Code | B, C, D |
| Network Frequency | 50/60Hz |
| Rated short-circuit capacity lcn:(A) | 6000A for In 6A to 40A 4500A for In 50A 63A |
| Energy Limiting Class I2t: | 3 comforming to IEC/EN 60898-1 |
| [Ui] Rated Insulation Voltage | 415V AC |
| [Uimp] Rated Impulse Withstand Voltage | 4000V |
| Mechanical Durability | 20000 cycles |
| Electrical Durability | 10000 cycles |
| Tightening Torque | M5 2.5N.m Ⅱ |
| IP Degree of Protection | IP20 comforming to IEC 60529 IP40(modular enclosure) comforming to IEC 60529 |
| Ambient Air Temperature for Operation | -5~40°C |
| EU RoHS Directive | Compliant EU RoHS Declaration |
| Pollution Degree | 2 comforming to IEC/EN 60898-1 |
| Upper Wiring Lower Wiring |  1-25mm²  |
Dimensions
Quotation Checklist
- Breaking capacity requirement: 4.5kA or 6kA
- Rated current, poles and curve type
- Order quantity per model
- Packaging and labeling request
- Destination market and required documents
Common Questions About OMB3-63
What is the main difference between OMB3-63 and OMB1-63?
OMB3-63 is positioned for flexible 4.5kA / 6kA project supply, while OMB1-63 is commonly used as a compact 6kA MCB option.
Can OMB3-63 be used for panel-building orders?
Yes. It can be discussed for distribution boards and panel-building supply when the required current, poles and curve type are confirmed.
Can packaging be discussed for distributor orders?
Yes. Packaging and labeling requirements can be discussed before order confirmation.
OMB3-63 MCB Selection and Applications
OMB3-63 MCB is designed for general AC distribution and final-circuit protection. Correct selection should be based on rated current, curve, poles, voltage and required breaking capacity. OOHMAGE supplies project quantities with model confirmation, technical documentation support and one-year warranty terms.
- Application fit: Confirm the electrical system and installation environment before final model selection.
- Documentation: CE and ISO-related documentation is available for the promoted product range, subject to exact model confirmation.
- Quality control: Products are checked according to the applicable inspection process before shipment.
Common Questions
How should variants be compared?
Compare current rating, tripping curve, pole configuration and breaking capacity against the circuit design.
Can documentation be supplied?
State the destination market and required CE or ISO-related documentation when requesting a quotation.
Compare the complete OOHMAGE MCB range, or send your ratings, quantity and application to info@oohmage.com for model confirmation and a quotation.
Request Quote
Tell us your specifications, quantity, or application scenario and we will reply with a tailored quote.
