What is the minimum order quantity for the AT-QCB2?

MOQ is 10–50 pieces for stocked models and 100–500 pieces for OEM or branded production, depending on the configuration and packaging. Trial orders are accepted for first-time buyers.

What is the lead time for AT-QCB2?

Stocked units ship in 3–7 working days. Production orders take 15–20 days after deposit and artwork approval; peak season (August–November) may extend to 25 days. The schedule is confirmed in writing on the proforma invoice.

Can the AT-QCB2 be customised with our brand?

Yes. We support OEM with your logo, housing colour, retail packaging and manual, and ODM with firmware and app-interface changes for Wi-Fi and 4G models. Provide artwork and target market requirements for evaluation.

Home › Products › Smart Breakers › AT-QCB2 Smart IoT MCB — 6 kA / 10 kA

Smart Breakers · Ref. AT-QCB2

AT-QCB2 Smart IoT MCB — 6 kA / 10 kA

Smart miniature circuit breaker, 1P to 4P, 20–80 A with B/C/D curves — standard 6 kA and H-type 10 kA versions with full remote control.

Remote ON/OFF, schedules, countdown and cycle timing from the free app
Real-time voltage, current, power and kWh metering with history
Over-voltage / under-voltage / over-current / over-power / over-temperature trip with auto-reclosing
Operation records, power-failure alarm and pre-alarm warnings
Voice control (Alexa / Google via Tuya), device sharing, group and scene control
Scheduled test-tripping, power-on delay reclosing and remote permission management
Basic (6 kA) and H-type (10 kA) breaking-capacity versions

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Buyer information

Model / SKU: AT-QCB2 (ref. at-qcb2)
MOQ: 10–50 pcs for stocked models · 100–500 pcs for OEM/branded runs
Lead time: 3–7 working days ex-stock · 15–20 days for production orders
Sample: Available in 3–5 days by courier; sample cost refundable on the first bulk order
Certification: CE, RoHS, CB scheme (selected models)
OEM / ODM: Logo, housing colour, packaging and manual; firmware & app changes for Wi-Fi/4G models
Trade terms: FOB Ningbo / Shanghai · CIF, DDP or EXW on request
Payment: T/T 30% deposit, balance before shipment · Alibaba Trade Assurance · PayPal for samples

Indicative terms for export orders. Final MOQ, price and schedule are confirmed in the quotation — reply within 24 hours.

Specifications
Poles / width	1P (36 mm) · 2P (54 mm) · 3P (90 mm) · 4P (108 mm)
Rated voltage	AC 230/240 V (1P/2P) · 400/415 V (3P/4P), 50/60 Hz
Rated current	20 A, 32 A, 63 A, 80 A
Trip curves	B, C, D
Breaking capacity	Basic: Icn = Ics = 6 kA · H type: Icn = 10 kA, Ics = 7.5 kA
Closing / opening time	< 3.0 s / < 1.0 s
Metering accuracy	Class 1.0
Communication	Wi-Fi (RS485, 4G, Zigbee options)
Wiring capacity	25 mm²

Typical applications: Distribution panels, construction-site power, cold storage and HVAC, EV charging circuits, base stations.

Further reading How to Size a Smart Circuit Breaker for 4G or Wi-Fi Control→Add Remote Control to an Existing Distribution Board Without Rewiring→Smart Breaker vs Smart Relay vs Contactor: Which One Controls Your Load Best?→

Bulk Pricing & OEM Options Available

Tell us your quantity and market — MOQ is flexible for first orders, and samples ship worldwide.

Get Factory Pricing

AT-QCB2 Smart IoT MCB — 6 kA / 10 kA

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Bulk Pricing & OEM Options Available