Hager ADM425T 25A RCBO Safety Switch 4 Pole (3P+N) 30mA Type A 6kA C Curve 230-415V AC 4 Module DIN Rail

Description

A 25A three-phase breaker with built-in safety switch.

The ADM425T from Hager is a 4 module RCBO carrying a 25A rating across three phases plus neutral. It trips on overload, short-circuit or 30mA earth leakage, giving every protected circuit its own independent residual current device without adding a separate RCD to the board.

Key Features

• Nominal current: 25A
• Characteristic: curve C
• Residual sensitivity: 30mA, Type A
• Configuration: 3P+N, 4 protected poles, neutral right
• Breaking capacity: 6kA Icn, 6kA Ics to IEC 60898-1
• Voltage: 230-415V AC at 50Hz
• Size: 4 modules, 71mm W x 84mm H x 70mm D
• Biconnect bottom terminal, DIN rail mounting
• Energy limitation class 3, IP2X protection

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How the Hager ADM425T Protects a 25A Circuit

Two devices in one housing
An RCBO is a residual current operated circuit breaker with integral overcurrent protection. In the ADM425T, the overcurrent section handles sustained overloads and short-circuits up to its 6kA rating, while the residual current section disconnects the circuit if current leaking to earth reaches 30mA. For three-phase boards, that means no shared RCD grouping and less disruption when a single circuit faults.

What Type A and C curve mean in practice
Type A sensing picks up alternating and pulsating direct earth fault currents. Curve C sets the magnetic trip point higher than curve B, giving tolerance to switch-on surges from mixed or inductive loads. Together with I²t class 3 energy limitation, these ratings define how the device behaves under fault.

Sizing and installation data

• Temperature derating: 25A at 30°C, 23.6A at 40°C, 22A at 50°C, 20.4A at 60°C.
• Side-by-side mounting of two devices: apply a 0.80 correction factor.
• Heat output: 12.3W power dissipation at rated current.
• Terminal capacity: 1-16mm² flexible or 1-25mm² solid conductors, 2Nm torque.
• Installation by a licensed electrician in line with the AS/NZS 3000 Wiring Rules.

Q: What is the Hager ADM425T?
A: It is a Hager 25A, 4 pole (3P+N) RCBO with a C tripping curve, 30mA Type A earth leakage protection and a 6kA breaking capacity, occupying 4 DIN rail modules.

Q: Does the Hager ADM425T need a separate RCD?
A: No. Earth leakage protection at 30mA is built into the ADM425T, so the circuit it feeds does not need an additional upstream RCD for that function.

Q: What is the operating temperature range of the Hager ADM425T?
A: Hager specifies an operating temperature of -25 to 40°C, with storage and transport rated from -55 to 70°C.