Eureka LSSO25/C003-A 1 Pole RCBO 25A 10kA 30mA C Curve Type A Safety Switch

Description

Eureka LSSO25/C003-A. 1 Pole RCBO. 25 Amp. 10kA. 30mA. C Curve. Type A. Safety Switch.

The Eureka LSSO25/C003-A is a 1 pole RCBO (Residual Current Breaker with Overcurrent protection) — combining earth leakage (RCD) and overcurrent (MCB) protection in a single 18mm DIN rail module. 25A rated current. 10kA breaking capacity. 30mA residual current sensitivity. C tripping curve. Type A earth leakage detection. Conforms to AS/NZS 61009. For installation in Eureka distribution boards and standard DIN rail switchboards. Must be installed by a licensed electrician.

• LSSO25/C003-A — 1 Pole RCBO, 25A, 10kA, 30mA, C Curve, Type A
• Rated current: 25A
• Tripping curve: C curve — suits resistive and general load circuits
• Breaking capacity: 10kA
• Residual current sensitivity: 30mA — personnel protection
• Earth leakage detection: Type A — detects sinusoidal AC and pulsating DC residual currents
• Poles: 1 pole
• Rated voltage: 240V AC
• Frequency: 50Hz
• Module width: 18mm — 1 DIN module
• Mounting: DIN rail
• Standard: AS/NZS 61009
• Suits Eureka distribution boards and standard DIN rail switchboards
• Provides combined protection against earth leakage, overload, and short circuit
• Must be installed by a licensed electrician
• Sold individually

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About RCBOs — Combined Safety Switch and Circuit Breaker

An RCBO (Residual Current Breaker with Overcurrent protection) combines the functions of a safety switch (RCD) and a circuit breaker (MCB) into a single device — providing protection against earth leakage faults, overload currents, and short circuits in a single DIN rail module. This makes the RCBO the preferred choice for individual circuit protection in modern distribution boards, replacing the need for a separate RCD and MCB for each protected circuit.

The 30mA residual current sensitivity is the standard level required for personnel protection in Australian electrical installations under AS/NZS 3000 — tripping within a defined time when earth leakage current reaches 30mA, before it can cause serious injury. Type A detection covers both sinusoidal AC residual currents and pulsating DC residual currents, providing broader protection than Type AC devices — suited to circuits supplying modern electronic equipment, variable speed drives, and switch-mode power supplies.

The C tripping curve suits general resistive and inductive load circuits in residential, commercial, and light industrial applications. At 25A, the LSSO25/C003-A suits higher-load circuits such as electric ovens, hot water systems, air conditioning units, and dedicated sub-circuit feeds. The LSSO25/C003-A is part of the Eureka LSSO range — 10kA rated, 18mm wide, DIN rail mounted — and is compatible with the Eureka distribution board and enclosure system. Conforms to AS/NZS 61009 and must be installed by a licensed electrician in accordance with AS/NZS 3000.

Q: What is an RCBO and how does it differ from an RCD or MCB?
A: An RCBO combines an RCD (safety switch) and an MCB (circuit breaker) in one device — providing earth leakage, overload, and short circuit protection in a single 18mm DIN module. An RCD alone provides earth leakage protection only. An MCB alone provides overload and short circuit protection only.

Q: What does 30mA sensitivity mean?
A: The RCBO will trip when earth leakage current reaches 30mA — the standard sensitivity level required for personnel protection in Australian electrical installations per AS/NZS 3000.

Q: What is Type A earth leakage detection?
A: Type A detects both sinusoidal AC and pulsating DC residual currents — suitable for circuits supplying electronic equipment, computers, variable speed drives, and appliances with switch-mode power supplies.

Q: What is the C curve and what loads does it suit?
A: The C tripping curve suits general resistive and inductive load circuits — ovens, hot water systems, air conditioning, and dedicated appliance circuits in residential and commercial installations.

Q: What is the breaking capacity of the LSSO25/C003-A?
A: The LSSO25/C003-A has a 10kA breaking capacity — suited to circuits where prospective fault current may reach up to 10,000A.

Q: Does the LSSO25/C003-A need to be installed by a licensed electrician?
A: Yes — installation of RCBOs in a distribution board must be carried out by a licensed electrician in accordance with AS/NZS 3000 Wiring Rules.