40A

Product Description

This 4-pole device (3 phases + neutral) offers a rated current of 40A and a residual operating current of 30mA, ensuring sensitive detection of leakage faults to prevent electric shock and fire hazards. Built to IEC 61008 standards, it features a compact modular design for easy DIN-rail mounting and is suitable for use in low-voltage distribution boards. Engineered for robust performance, the RKN4030 provides excellent breaking capacity (6kA per IEC 61008) and is rated for insulation voltage of 500V AC. Its electromechanical trip mechanism ensures high reliability and durability, with a mechanical endurance of 20,000 operations and electrical endurance of 10,000 cycles. The device operates within a wide temperature range of -25°C to +55°C, making it adaptable to various environmental conditions. The RKN series is known for its high immunity to nuisance tripping, thanks to advanced filtering against transient surges. This RCCB is ideal for protecting circuits in motor control centers, panel boards, and machinery where earth leakage protection is critical. It is compatible with LS's range of MCBs and other modular devices, allowing for coordinated protection schemes. With its IP20 protection degree (for front face) and IP40 for terminal connections, it ensures safe installation and operation. The LS 40A 30mA RKN 3P+N is a genuine OEM product, ensuring original quality and performance, backed by LS Electric's global reputation for industrial automation and electrical equipment. The LS 40A 30mA RKN 3P+N is a high-performance residual current circuit breaker (RCCB) from LS Electric's RKN series, designed for reliable protection against earth leakage currents in industrial and commercial electrical systems.

Basic Product Information

• 4-pole design (3P+N) for three-phase systems with neutral
• Rated current 40A suitable for branch circuit protection
• Compact modular housing for DIN-rail mounting (35mm)
• High breaking capacity (6kA) per IEC 61008
• Wide operating temperature range (-25°C to +55°C)
• Robust construction with high mechanical endurance (20,000 cycles)
• Immunity to nuisance tripping due to transient surges
• High sensitivity 30mA residual current detection for enhanced safety

Technical Specifications

Version & Model Difference

The RKN series from LS Electric includes various models with different rated currents (e.g., 16A, 25A, 40A, 63A) and residual sensitivities (30mA, 100mA, 300mA). The 40A 30mA 3P+N version is specifically designed for three-phase circuits requiring high sensitivity protection. Compared to the 100mA or 300mA versions, the 30mA sensitivity offers better protection against electric shock for personnel. The 3P+N configuration distinguishes it from 2-pole (1P+N) versions used in single-phase applications. All RKN models share the same compact housing and mounting features, but the electrical ratings vary to suit different load requirements.

Application Scenarios

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• LS RELAY MT-32 (9-13A) - Thermal Overload Relay for Motor Protection
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• LS CONTACTOR MC-6A 220VAC