The MGN25087 is a 1-pole C60H miniature circuit breaker from the Multi9 range, rated 20 A with a D tripping curve and a 15 kA Icu breaking capacity at 240 V AC. For a 415 V AC phase-to-neutral circuit, the Icu drops to 4 kA — that's the limit to respect when coordinating upstream. It's a thermal-magnetic breaker, so the thermal bimetal handles overloads and the solenoid handles short-circuits. The 1-pole form factor clips onto a 35 mm symmetrical DIN rail and occupies 2 x 9 mm pitches (18 mm wide) — standard for a single-pole MCB in a distribution board.
Where it fits — panel integration and compliance
The breaker is suitable for isolation — the toggle gives a visible ON/OFF indication and a contact position indicator so you can verify the circuit is open before working downstream. That's a practical check for maintenance techs isolating a motor branch circuit.
The part carries EN/IEC 60947-2 certification, which covers the breaking capacity and service duty for industrial and commercial distribution. That's the standard most panel builders and site electrical engineers will check for coordination studies. No UL or CSA listing is on the evidence for this specific code, so if your project requires those marks, verify before specifying.
What the D-curve means for selectivity
The D-curve's magnetic trip at 12 x In gives a wider gap between overload and short-circuit than a C-curve. This helps coordinate with motor starters.