Molded Case Type Circuit Breaker

JHM1 Molded Case Type Circuit Breaker, manufactured and supplied by China-based company Jinhand Electrical, is designed for AC 50Hz systems with operational voltages up to 690V and currents up to 1250A. Suitable for infrequent switching and motor starting, this factory-direct product provides reliable overload, short-circuit, and undervoltage protection to safeguard electrical lines and power supply equipment.

Advantages

1.Comprehensive Protection: Equipped with overload, short-circuit, and under-voltage protection, ensuring the safety of electrical lines and equipment.
2.High Capacity: Supports a rated operational current of up to 1250A, making it suitable for demanding applications.
3.Reliable Performance: Designed for infrequent switching and motor starting, providing dependable operation in various industrial settings.

MAIN TECHNICAL PARAMETERS

Project		JHM1-63			JHM1-125			JHM1-250			JHM1-400				JHM1-630				JHM1-800				JHM1-1250
Frame Size Rating		63			125			250			400				630				800				1250
Rated Current In (A)		6/10/16/ 20/25/32/ 40/50/63			10/16/20/25/32/40/50/63/ 80/100/125			100/125/140/160/180/200/225/250			200/225/250/ 315/350/400				400/500/630				630/700/800				800/1000/1250
Rated Operational Voltage Ue(V)		AC400/690			AC400/690			AC400/690			AC400/690				AC400/690				AC400/690				AC400/690
Rated Insulation Voltage Ui(V)		AC500			AC800			AC800			AC800				AC800				AC800				AC800
Number of Poles		3/4			3/4			3/4			3/4				3/4				3/4				3
Rated Ultimate Short-Circuit Breaking Capacity Level		L	M	H	L	M	H	L	M	H	L	M		H	L	M		H	M		H		M	H
Rated Ultimate Short-Circuit Breaking Capacity Icu(kA)	AC690V					20	30		20	30		20		30		20		30	30				30	30
	AC400V	35	50	85	35	65	85	35	65	85	50	65		100	65	75		100	65		75		65	100
Rated Service Short-Circuit Breaking Capacity lcs(kA)	AC690V					10	15		10	15		15		15		15		20	20				20	20
	AC400V	22	35	55	22	40	65	22	40	65	35	50		65	42	50		65	42		50		50	65
Operating Performance (cycles)	Energized/ Power On	4500			3000			2500			1500				1500				1000				500
	De- energized/ Power Off	8500			7000			6500			4000				4000				2500				2500
	L	136			150			165			257				270				280				330
	W	77	77/103		92	92/122		106	142		149		198		182		240		210	280		210	210
	H	74	82		71	89		88	106		105				107				106				137
Arcing Distance(mm)		≤50			≤50			≤50			≤50				≤50				≤100				≤100

Main Features

1.Rated Specifications: Rated insulation voltage of 800V (500V for JHM1-63) and operational voltage up to 690V (400V for JHM1-63).
2.Versatile Application: Ideal for use in AC 50Hz circuits, accommodating a wide range of electrical systems.
3.Durable Design: Engineered to withstand the demands of motor starting applications, enhancing overall reliability and performance.

Product Highlights

1.Wide Current Coverage: Covers multiple current ranges from 63A to 1250A, meeting diverse load requirements with strong adaptability.
2.High Breaking Capacity Options: Offers L/M/H three-level breaking capacities (up to 100 kA/400V), allowing flexible selection based on protection needs.
3.Broad Voltage Range Compatibility: Rated operational voltage up to AC 690V, suitable for both 400V and 690V systems.
4.Versatile Accessory Support: Compatible with auxiliary contacts, alarm contacts, shunt trips, undervoltage releases, and other accessories for extended functionality.

Operational Cost Optimization

1.Long Electrical Life Design: Electrical operating life up to 8,500 cycles (JHM1-63), reducing replacement frequency and maintenance costs.
2.Modular Accessory Configuration: Accessories feature plug-and-play design, allowing easy on-site installation without replacing the entire unit.
3.Clear Status Indication: Three-state indication ("ON-OFF-FAULT") for quick identification of operational status.
4.Standardized Maintenance Procedures: Provides maintenance guides and diagnostic methods, lowering the technical threshold for upkeep.

Logistics & Installation

1.Compact Packaging Design: Standardized packaging for different specifications, sturdy structure, easy stacking and transportation.
2.Flexible Installation Methods: Supports DIN rail mounting and front-panel fixed installation, with installation hole templates for convenient construction.
3.Global Logistics Support: Partners with multiple international logistics companies, offering DDP/DAP and other trade terms.
4.Multilingual Technical Documentation: Provides installation manuals, wiring diagrams, and parameter tables in Chinese and English for overseas projects.

Production Process Advantages

1.Automated Production Lines: Key processes such as contact welding, coil winding, and housing injection molding are automated.
2.Comprehensive Testing System: Each unit undergoes operational characteristic, withstand voltage, and temperature rise tests to ensure consistency.
3.Eco-Friendly Manufacturing Processes: Lead-free welding, recyclable housing materials, production complies with green manufacturing standards.
4.Strict Quality Management: ISO 9001 certified, implements full-process quality control from incoming materials to finished products.

Innovation Highlights

1.Dual Protection with Bimetal and Magnetic Trip: Precise overload protection, fast short-circuit response, and high protection reliability.
2.Contact Repulsion Guidance Design: Contacts open rapidly under short-circuit current, reducing arc erosion and improving breaking performance.
3.Optimized Operating Mechanism: Low handle operating force, clear tactile feedback, supports padlocking for enhanced operational safety.
4.Modular Expansion Slot Design: Preconfigured slots for accessory installation, supporting functional expansion and on-site upgrades.

Supply Chain Advantages

1.Vertical Integration Production Capability: Core components such as contacts, coils, and housings are manufactured in-house, ensuring supply stability.
2.Nationwide Multi-Warehouse Layout: Central warehouses in East, South, and West China support rapid allocation and delivery.
3.Flexible Order Response Mechanism: Supports small-batch customization and large-volume orders with controllable delivery cycles.
4.Global Spare Parts Supply Network: Spare parts stocked in key export countries to ensure timely after-sales support.

Contact us

Having gone through more than a decade of steady development, Jinhand is now one of the top manufacturers and suppliers of electrical equipment in China. Our factory employs various cutting-edge technologies and equipment, and we welcome you to buy our top-tier, competitively priced China-made products.