Circuit Breakers - MCB, MCCB & RCCB Supplier

MCB, MCCB and RCCB for Distribution Boards

The range starts with M6, M7 and M8 miniature circuit breakers from 1 A to 63 A in 1P to 4P, with 6 kA breaking capacity, B/C/D trip curves and 230/400 V ratings for final circuit protection. Moulded case breakers cover 6 A to 1250 A across seven frame sizes with L, M and H breaking classes, while the L8 residual current breakers add 30 mA to 300 mA earth leakage protection in 2P and 4P versions.

All breakers are calibrated and routine-tested in our Ningbo plant and carry CE and RoHS certification. Tell us the breaking capacity, number of poles and tripping curve your panel needs and we will quote the matching model with test reports.

FAQ

Frequently Asked Questions

What products does Ningbo Doto Electric supply?

We manufacture and export a complete range of low voltage electrical products: AC contactors (CJX2 series), miniature circuit breakers, RCCB / RCBO residual current devices, thermal overload relays, current transformers, power capacitors, energy meters, counters, hour meters, fuse cutouts, limit switches and related accessories.

Do you support OEM and ODM service?

Yes. OEM is available on most product lines - we can print your brand, customize packaging and adjust specifications such as coil voltage, frequency and terminal type to your market requirements. Send us your requirement for a detailed OEM proposal.

Are your products certified?

Our products carry CE and RoHS certification, and the factory operates under an ISO 9001 quality system. Copies of certificates and routine test reports are available on request - see our Qualifications page for the full list.

How quickly will I get a quotation?

Every inquiry is answered within one working day (24 hours). To speed up the quotation, please include the model number, rated current / voltage and quantity - our engineers will confirm the specification and reply with price, MOQ and lead time.

Can I visit your factory?

You are welcome to visit us in Ningbo, Zhejiang, China. Our office and production base are open Monday to Saturday, 8:00-18:00 (GMT+8). Contact us in advance and we will arrange the schedule, factory tour and product demonstration.

Which markets do you export to?

We export worldwide, with key markets across Southeast Asia, South Asia, the Middle East, Africa, South America and Europe. Our team is experienced in export documentation, third-party inspection and multimodal shipping arrangements.

Ningbo Doto Electric Co., Ltd.

Professional manufacturer of AC contactors, circuit breakers, capacitors, hour meters and counters. Factory-direct, CE & ROHS certified, exporting worldwide.

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Contact

Tel. 0086-574-81859726
Mobile 0086-130-7191-2583
Email Nanna@doto-cn.com
No.99 Jinchuan Road, Jiaochuan Street, Zhenhai District, Ningbo, Zhejiang, China

Circuit Breaker