Item No.: LYM9H

Key Specifications：

Scope of application
LYM9H-DC DC circuit breaker is used for DC voltage up to 1000V,rated current up to 63A for overload and short circuit protection, and it can also be used for infrequent operation conversion
of the line.
It is suitable for DC system applications such as communication and photovoltaic systems.
Compliant with:GB 14048.2,IEC 60947-2
Product Features: double busbars, transparent
logo, quick closing function and independent
appearance patent.

🔹 Product: LYM9H DC Miniature Circuit Breaker

The LYM9H is a compact DC miniature circuit breaker designed for low-to-medium voltage DC circuits, offering reliable protection against overload and short-circuit faults in photovoltaic, industrial, and auxiliary DC power systems.

🔹 Key Technical Knowledge

Protection type: Thermal-magnetic DC circuit protection
Pole configuration: Single-pole DC interruption
Voltage range: Designed for standard DC distribution voltages
Installation: Standard 35 mm DIN rail
Switching durability: Suitable for frequent manual and automatic switching
Manufacturer role: OEM-ready DC MCB factory supplier

🔹 Why choose LYM9H?

Optimized for compact DC panels where space efficiency matters
Clear polarity design ensures correct and safe DC installation
Reliable tripping response protects downstream DC loads
Cost-effective solution for scalable DC protection projects

🔹 OEM & Manufacturing Advantage

As an experienced DC MCB factory, we provide in-bulk production, customized markings, and OEM/ODM support tailored for distributors, panel builders, and renewable-energy system manufacturers.

🔹 Use Cases / Industries

PV DC branch circuits
Energy storage auxiliary circuits
Industrial DC control panels
Power supply protection in automation systems
Renewable energy balance-of-system (BOS) equipment

FAQs

1. What applications is the LYM9H DC MCB ideal for?
The LYM9H DC MCB is designed for protection of direct current power systems, particularly where stable overload and short-circuit management is essential — for example in solar PV, energy storage, and industrial DC circuits.

2. What protection does this DC breaker offer?
This DC miniature breaker delivers thermal overload protection and magnetic short-circuit response, preventing wiring damage and system faults in high-voltage DC environments.

3. Is the neutral or polarity a concern with this DC MCB?
Yes — polarity is important in DC installation. These breakers typically include clear polarity markings and are designed for secure wiring to ensure the correct flow of DC through the protective contacts.

4. How is the LYM9H installed?
The breaker supports standard 35 mm DIN rail mounting, making it compatible with most DC distribution cabinets and combiner boxes.

5. Does this product support large-volume orders for projects?
Yes. As a DC MCB factory and OEM supplier, we provide bulk orders, customized marking, and packaging to meet the needs of distributors and integrators worldwide.