NOARK B1H 5A 3-Pole Miniature Circuit Breaker | B1H3C05 | 480Y/277V | UL 489

NOARK B1H3C05 5A 3-Pole Miniature Circuit Breaker – 480Y/277V AC, UL 489 Reliable Industrial-Grade Circuit Protection | 10kA Interrupting Capacity | DIN Rail Mounting Download Technical Datasheet The NOARK B1H3C05 is a professional-grade, 5-amp, 3-pole miniature circuit breaker engineered for dependable overload and short-circuit protection in commercial and industrial electrical systems. Part of NOARK's Ex9 B1H Series, this UL 489 listed circuit breaker features thermal-magnetic protection, a C-curve trip characteristic, and a compact DIN rail mounting design. With a 10kA interrupting rating and a mechanical service life of 20,000 operations, it delivers dependable performance for electrical distribution and industrial control applications. Key Features & Benefits 5A, 3-Pole Protection: Designed for compatible three-phase electrical circuits. 480Y/277V AC Rated: Suitable for appropriately rated commercial and industrial power distribution systems. 10kA Interrupting Capacity: Provides high fault-current interruption capability. C-Curve Trip Characteristic: Magnetic trip range of 5–10 times rated current, suitable for applications with moderate inrush currents. Thermal-Magnetic Protection: Combines overload and short-circuit protection. UL 489 Listed: Certified for branch circuit protection applications. 20,000 Mechanical Operations: Designed for long-term durability. 10,000 Electrical Operations: Manufacturer-rated electrical service life. IP20 Protection Rating: Provides protection against finger contact with hazardous parts under specified conditions. 35 mm DIN Rail Mounting: Allows straightforward installation in compatible electrical panels. Double Terminal Technology: Designed for efficient wiring, with captive connecting screws that simplify installation. Technical Specifications Specification Details Brand NOARK Series Ex9 B1H Part Number B1H3C05 Rated Current 5A Poles 3 Trip Curve Type C Rated Voltage 480Y/277V AC Frequency 50/60 Hz Interrupting Rating 10kA Protection Mechanism Thermal-Magnetic Electrical Life 10,000 Operations Mechanical Life 20,000 Operations Protection Rating IP20 Insulation Voltage 500V AC Impulse Withstand 6kV Mounting 35mm DIN Rail Dimensions 2.10" W × 4.30" H × 3.11" D Unit Weight Approx. 0.93 lb Certifications UL 489, CSA C22.2 No. 5 Applications The NOARK B1H3C05 is designed for use in compatible commercial and industrial electrical installations, including: Industrial control panels and automation equipment Three-phase power distribution systems Commercial electrical distribution panels HVAC and refrigeration equipment circuits Machinery and electrical control cabinets OEM electrical equipment Built for Dependable Performance NOARK's Ex9 B1 Series combines compact construction, recognized safety certifications, and convenient installation features. With its thermal-magnetic protection system, 10kA interrupting capacity, and durable mechanical design, the B1H3C05 is a practical solution for professional electrical applications. Choose the NOARK B1H3C05 for reliable 5A, 3-pole branch circuit protection. Please verify electrical ratings, installation requirements, and equipment compatibility before purchasing. Installation should be performed by qualified electrical personnel.