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Schneider 3P+N 25A 300mA RCBO (A9D7725) –

The Schneider Electric A9D7725 is a 25A 3P+N RCBO specifically engineered for industrial main incomer applications requiring high-sensitivity fire protection.

Quick Answer

Yes, purchase the Schneider A9D7725 RCBO if your industrial facility requires robust, combined protection for 3-phase systems. Its 25A 3P+N configuration and 300mA Type AC sensitivity are specifically engineered for high-risk areas needing superior fire and electrical fault prevention, a critical safety standard for many Indian industries. It integrates overload, short-circuit, and earth leakage into one compact unit, ensuring comprehensive safety and compliance.

✓Protects your facility from fire hazards — 300mA residual current sensitivity trips the circuit within ≤300ms at 1x Idn.
✓High 6kA breaking capacity — ensures the device can safely interrupt significant fault currents without internal damage.
✓Guarantees long-term mechanical reliability — rated for 20,000 cycles to reduce maintenance overhead in industrial environments.
✓C-curve tripping characteristic — allows for standard industrial inductive loads while maintaining a 25A continuous rating.
✓Operates safely in demanding thermal conditions — UL94 V0 flammability rating and 960°C glow wire test compliance ensure housing integrity.
✓3P+N switched neutral configuration — provides total circuit disconnection for 400V systems during instantaneous trip events.

This Schneider A9D7725 RCBO is essential for Indian industrial sites prioritizing advanced 3-phase system safety with 300mA fire protection. Avoid if your application is residential or requires only basic overload protection; its specialized features and cost are tailored for complex industrial main incomer demands.

Product Overview
The Schneider Electric A9D7725 is a 25A 3P+N RCBO specifically engineered for industrial main incomer applications requiring high-sensitivity fire protection. This 400V device integrates earth leakage, overload, and short-circuit protection into a single 4-module width unit, ensuring comprehensive safety for complex 3-phase systems. Operating at a 50Hz frequency, it utilizes Type AC residual current sensing to detect 300mA leakages before they can ignite flammable materials.

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Engineering Analysis
The Type AC sensing mechanism is calibrated for a 300mA threshold, making it essential for fire prevention where leakage currents might otherwise go undetected by standard 25A breakers. Its 6kA breaking capacity and Class 3 energy limiting performance allow it to safely manage high-energy faults at the distribution source. The 3P+N design with a switched neutral is critical for industrial settings, ensuring that neutral faults are isolated alongside the three phases to prevent voltage imbalances.

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