Hager CDA463T RCCB 4 Pole 63A 30mA Type A Safety Switch 230/400V

Description

Three-phase earth-leakage protection built for modern electrical loads.

The Hager CDA463T is a 4-pole (3P+N) Type A RCCB rated 63A at 30mA — designed to detect both AC and pulsating DC residual fault currents. Where a standard Type AC unit goes blind on the earth leakage that inverters, EV chargers, and switched-mode power supplies generate, the CDA463T catches it. One device. Full coverage.

Key Features

• 4-pole (3P+N) — protects all three phases plus neutral in a 400V AC system
• 63A rated current, 30mA trip sensitivity — standard personal-protection threshold
• Type A detection — senses AC and pulsating DC residual fault currents
• 230/400V AC, 50Hz — rated insulation voltage 500V, impulse withstand 4kV
• 6kA conditional short-circuit current (Inc) per EN 61008-1 with suitable upstream MCB
• 1.50kA rated breaking capacity (Idm)
• 4-module width — 70mm W × 83mm H × 70mm D, standard 35mm DIN rail mount
• Screw terminals top, biconnect terminals bottom — up to 25mm² rigid / 16mm² flexible, 2.8Nm torque
• IP20 ingress protection — rated for installation inside an enclosed switchboard
• 2,000 electrical / 4,000 mechanical operations endurance
• Total power loss under rated current: 18.5W
• RoHS compliant; REACh declaration available from Hager
• 2-year manufacturer warranty

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Why Type A Is Now the Minimum — Not the Upgrade

AS/NZS 3000:2018 and the installation requirements of most modern appliances increasingly specify Type A RCDs for circuits feeding any electronic load with a rectifier stage. Inverter air conditioners, EV chargers, induction cooktops, variable-speed drives, computer power supplies, and LED dimmer circuits can all inject pulsating DC into the earth path during a fault. A Type AC RCCB will not detect this — it will sit there appearing healthy while the fault persists. The CDA463T's Type A sensing element catches both AC and pulsating DC, covering the full fault spectrum of a modern switchboard without the significant cost premium of a Type B unit.

Where It Belongs in the Board

For three-phase sub-board incomers, main switchboard earth-leakage protection, EV charger distribution feeds, solar PV consumer-side incomer protection, and machinery circuits where AS/NZS 3000 mandates RCD coverage — the CDA463T is the practical, code-compliant choice. The compact 4-module footprint and biconnect terminals keep the board tidy and make wiring fast. Sparkies fitting out new residential builds, commercial fitouts, and light industrial panels will appreciate both.

Temperature Performance You Can Specify With Confidence

The CDA463T is rated to full capacity from -25°C through to +40°C ambient. Above that it derates gracefully: 58A at 50°C, 45A at 70°C continuous — published OEM data, not a safety assumption. That makes it a confident specification for plant rooms and switchboards where ambient temperatures regularly push above 40°C. The device also accepts optional accessories including shunt trip, under-voltage release, and auxiliary contact block, making it adaptable for remotely-operated or monitored boards.

Q: Does the Hager CDA463T provide overload and short-circuit protection as well as earth-leakage protection?
A: No. The CDA463T is an RCCB — it provides earth-leakage (residual current) protection only. A separate upstream MCB or fuse rated for the circuit is required for overload and short-circuit protection. The 6kA conditional short-circuit rating (Inc) applies when a suitable upstream protective device is installed.

Q: Is the Hager CDA463T suitable for EV charger circuits in Australia?
A: Yes. EV charger manufacturers and AS/NZS 3000:2018 specify Type A RCDs as the minimum requirement for EV charger circuits, because the charger's rectifier can generate pulsating DC fault currents that a Type AC device will not detect. The CDA463T's Type A sensing makes it the correct and compliant choice for EV charger distribution feeds.

Q: Can the Hager CDA463T be used in a single-phase switchboard?
A: The CDA463T is a 4-pole (3P+N) device designed for 230/400V three-phase systems. For single-phase applications, a 2-pole Hager RCCB from the CDA series — such as the CDA263T — is generally more appropriate and space-efficient.

NOTE: The CDA463T is an RCCB providing earth-leakage protection only — it does not provide overcurrent or short-circuit protection. A separate upstream MCB or fuse is required. Installation must be carried out by a licensed electrician in accordance with AS/NZS 3000.