Hager BD163T 63A 30mA Type A 3 Pole Earth Leakage Add-On Block

Description

Bolt-on earth leakage protection, one module wide.

The Hager BD163T is a 63A, 30mA Type A earth leakage add-on block that attaches to a compatible circuit breaker to add residual current protection to a three-phase circuit. It detects both AC and pulsating DC earth faults, helping guard against electric shock and fire without taking up extra space in your switchboard.

Key Features

• 63A rated current, 3 pole
• 30mA rated residual operating current
• Type A RCD detection (AC and pulsating DC faults)
• Single module (1 mod) width
• Rated operational voltage 240-415V, 50Hz
• Screw terminal connection
• Right-hand neutral position
• Rated insulation voltage Ui 500V, impulse withstand Uimp 4kV
• Fits standard 35mm DIN rail

Order today for fast dispatch Australia-wide.

What Is an Earth Leakage Add-On Block?

An add-on block clips onto an existing circuit breaker to give it residual current (earth leakage) detection. Instead of replacing a breaker with a larger combined RCBO, you upgrade the circuit you already have. The BD163T pairs 63A capacity with 30mA sensitivity, the level used for personal shock protection.

Why Type A Matters

A Type A residual current device detects standard AC earth leakage and pulsating DC fault currents. Circuits feeding equipment with electronic power supplies, variable-speed drives or EV charging can produce DC leakage that a basic Type AC device may miss. Type A closes that gap, which is why it is increasingly specified for modern three-phase loads.

Built for Australian Switchboards

At one module wide, the BD163T adds RCD functionality without crowding the board, making it a practical retrofit for residential and commercial switchboards across Australia. It mounts on 35mm DIN rail, uses screw terminals for a secure and serviceable connection, and positions the neutral on the right-hand side. Rated 240-415V at 50Hz, it suits standard three-phase supply.

Q: What is a Hager BD163T used for?
A: It adds 30mA earth leakage (residual current) protection to a compatible three-phase circuit breaker, creating combined overcurrent and RCD protection for a 63A circuit.

Q: What is the difference between a Type A and Type AC RCD?
A: Type A detects both alternating (AC) and pulsating direct current (DC) residual currents, while Type AC detects AC only. The BD163T is Type A, so it covers modern loads with electronic components that AC-only devices can miss.

Q: Do I need to replace my breaker to add earth leakage protection?
A: No. The BD163T attaches to a compatible circuit breaker as a single-module add-on, so you can add RCD protection to an existing breaker rather than swapping in a larger combined unit.