Hager HMF199T Miniature Circuit Breaker MCB 125A 1 Pole C Curve 10kA 1.5 Module DIN Rail

Description

125A sub-main protection on DIN rail.

The Hager HMF199T is a 125A single-pole high-current miniature circuit breaker (MCB) with a C tripping curve and 10kA breaking capacity, protecting sub-mains and heavy distribution circuits from a compact 1.5-module DIN rail body.

Key Features

• Rated current: 125A, single pole (1P)
• C tripping curve (5–10x In)
• 10kA breaking capacity (Icn) to IEC 60898-1
• Rated voltage 230–415V AC, insulation voltage 500V
• Compact 1.5-module width (27mm) DIN rail mount
• High-capacity terminals: rigid to 70mm², flexible to 50mm²
• Rated impulse withstand voltage 6000V; IP20
• Compliant with AS/NZS 60898.1 and AS/NZS IEC 60947-2

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Why it Matters

High-current protection in a modular package.
The HMF199T is a 125A miniature circuit breaker from Hager's high-current HMF range, protecting a circuit against both overload and short circuit and tripping automatically when either occurs. At 125A it is built for sub-mains and heavy general-distribution loads – feeding sub-boards, large machinery circuits and high-demand feeds – that sit well above the range of standard 6A to 63A MCBs, while still mounting on standard DIN rail rather than requiring a moulded-case breaker.

C curve and genuine cable capacity.
The C tripping characteristic trips on short circuit at 5 to 10 times rated current, the general-purpose curve for mixed resistive and inductive loads. Backed by a 10kA short-circuit breaking capacity to IEC 60898-1 (with a 75% Ics service breaking capacity to IEC 60947-2), its high-capacity terminals accept rigid conductors up to 70mm² and flexible up to 50mm² at a 3.5 to 5.0Nm torque – matching the heavy cable a 125A feed runs.

Built for Australian switchboards.
At 1.5 modules (27mm) wide, 90mm high and 70mm deep, the HMF199T mounts on standard 35mm DIN rail with 360° mounting flexibility. It is compliant with AS/NZS 60898.1 and AS/NZS IEC 60947-2, rated IP20, and operates from -25°C to 70°C to suit main and sub-distribution boards across Australian conditions. With 9.93W dissipation at full load, an LZ060 heat dissipation insert is worth fitting where devices are packed tightly; MZN130 terminal cover, MZN175 locking kit and MZ auxiliaries are also available.

Q: What is the Hager HMF199T used for?
It is a 125A single-pole high-current MCB for protecting sub-mains and heavy distribution circuits against overload and short circuit, on standard DIN rail.

Q: What cable can the HMF199T terminals take?
Rigid conductors up to 70mm² and flexible up to 50mm², tightened to between 3.5 and 5.0Nm – sized for a 125A sub-main.

Q: What does the 10kA rating mean on the HMF199T?
10kA is the rated short-circuit breaking capacity (Icn) to IEC 60898-1 – the maximum fault current the breaker can safely interrupt – with a 75% service breaking capacity (Ics) to IEC 60947-2.