OEM/ODM DC Circuit Breaker Manufacturer & Supplier in Ethiopia

Alternating current (AC) cycles through a natural zero-voltage point 50 or 60 times every second, which allows standard AC breakers to quench electrical arcs easily. Direct current (DC) has continuous, sustained voltage without a natural zero point. When contacts open under DC load, an intense electric arc continues to burn across the contact gap. Installing an AC MCB on DC solar strings or batteries often leads to catastrophic terminal melting, housing fire, and sustained short-circuit arcs. Zhejiang TMB's DC miniature circuit breakers feature permanent internal magnetic blowouts and dedicated ceramic arc splitters engineered specifically to snuff DC arcs under voltages up to 1000V DC.

IEC 60947-2 standards establish nominal ratings up to an altitude of 2,000 meters above sea level. Above 2,000 meters, lower atmospheric pressure decreases dielectric breakdown voltage and cooling efficiency. For installations in Addis Ababa (~2,400m), apply a current de-rating factor of 0.92 to 0.94 and a operational voltage de-rating factor of 0.90. For example, a 63A DC MCB operating in an unventilated outdoor metal distribution box in Addis Ababa should be engineered for an effective continuous thermal current capacity of approximately 58A. Our application engineers provide certified de-rating curves to validate your switchgear submittals.

All our catalog DC MCBs, MCCBs, SPDs, and ATS switches carry full CE conformity markings and are tested in strict accordance with IEC/EN 60947-2 (industrial circuit breakers) and IEC/EN 60898-2 (DC circuit protection for household/similar uses). We furnish complete third-party laboratory test reports, Factory Acceptance Test (FAT) data sheets, ISO9001 compliance certificates, and TÜV Rheinland verified audit reports. These documents satisfy the mandatory inspection requirements of the Ethiopian Standards Agency (ESA) and international pre-shipment inspection agencies (e.g., SGS, Bureau Veritas).

Standard catalog sample orders and trial quantities (5 to 100 units) are ready for dispatch within 5–7 business days from our Liushi factory. Volume container orders (e.g., 20ft / 40ft HQ loads for EPC contractors) require 20–25 days for complete manufacturing, 100% routine testing, and export packing. Shipments typically depart from Ningbo Port or Shanghai Port via direct ocean freight to the Port of Djibouti (approx. 18–22 days transit), followed by bonded multi-modal road or Ethio-Djibouti Railway freight to the Modjo Dry Port inland clearance hub.

Yes, full OEM/ODM branding is one of our primary core competencies. We design and assemble complete IP65/IP66 outdoor polycarbonate or cold-rolled steel combiner boxes tailored to your precise string count (1-in-1-out, 4-in-2-out, up to 16-in-1-out) equipped with coordinated 1000V DC MCBs, gPV cylindrical fuses, and Type 2 DC SPDs. We provide high-resolution UV laser etching of your brand logo, customized wiring schematics, Amharic/English warning labels, and bespoke packaging for wholesale distribution across East Africa.

We are fully versed in Ethiopian foreign currency management realities. We support confirmed, irrevocable Letters of Credit (L/C at sight) opened through accredited commercial banks in Ethiopia (such as the Commercial Bank of Ethiopia, Awash Bank, or Dashen Bank), as well as standard Telegraphic Transfers (T/T). Standard commercial terms offered include FOB Ningbo/Shanghai, CIF Djibouti Port, or CFR Modjo Dry Port.