Miniature circuit breaker (MCB), Acti9 C60H-DC, 2P, 40A, C curve, 6kA (IEC/EN 60947-2)

The Schneider Electric A9N61537 is a 2-pole, 40 A, C-curve Acti9 C60H-DC miniature circuit breaker rated for 500 V DC circuits. It is a DC-dedicated device built to protect solar PV strings, battery banks, DC distribution and DC control circuits, where the fault arc behaves very differently from an AC circuit and demands a purpose-rated breaker. Both poles are connected in series to reach the full 500 V DC rating and to reliably extinguish the DC arc during a fault.

Quick Specs

• Part number: A9N61537 — Schneider Electric Acti9 C60H-DC
• Rated current (In): 40 A at 25 °C
• Poles: 2P (both poles wired in series for DC breaking)
• Tripping curve: C (thermal-magnetic trip unit)
• Network type: DC only
• Rated operating / insulation voltage: 500 V DC (Ue and Ui); Uimp 6 kV
• Breaking capacity (Icu): 6 kA at 500 V DC, 10 kA at 440 V DC, 20 kA at 220–250 V DC (IEC/EN 60947-2)
• Standards: IEC/EN 60947-2, utilisation category A, suitable for isolation
• Format: 4 modules wide (approx. 36 mm), 35 mm DIN-rail mount; IP20 terminals
• Supplied as genuine Schneider stock from our Dubai counter with fast UAE/GCC dispatch

Applications & Compatibility

The 40 A C60H-DC suits main-circuit protection on the direct-current side of a system.

• Solar PV string and array protection up to 500 V DC.
• Battery banks, DC distribution boards, and hybrid/solar DC circuits carrying higher currents.
• Connection polarity is marked on the front of the device and must be observed — a DC breaker only interrupts correctly when wired in the intended current direction.
• Accepts Acti9 auxiliaries and remote-signalling options; DC residual-current protection is handled by a separate device rather than a standard AC Vigi block, so confirm the correct DC-rated accessory with our engineer.

Why Buy From Electrical Junction

Electrical Junction is a Dubai-based distributor of genuine Schneider Electric, ABB and Lovato switchgear, sourced through our Mumbai arm (MAS Global Enterprises) across India, China and Europe. DC solar protection is a category we handle daily, so specification questions reach an engineer rather than a ticket queue.

• Genuine Schneider Electric C60H-DC — no grey-market substitution.
• DC sizing and polarity checked by our engineer before dispatch on solar and export orders.
• Dubai walk-in counter for in-person verification, plus fast dispatch across the UAE, GCC and African markets.

Frequently Asked Questions

Is the A9N61537 suitable for solar PV and DC circuits?

Yes. The A9N61537 is a DC-only miniature circuit breaker rated for 500 V DC and 40 A, purpose-built to protect solar PV strings, battery banks and DC distribution circuits. It is designed to safely break DC fault arcs, which behave very differently from AC arcs, so it must never be replaced with a standard AC MCB on the DC side of a system.

What is the breaking capacity of the A9N61537?

The A9N61537 has a rated ultimate breaking capacity (Icu) of 6 kA at 500 V DC, rising to 10 kA at 440 V DC and 20 kA at 220–250 V DC, all conforming to IEC/EN 60947-2. Listings that quote a single 20 kA figure are stating the value at the lower 220 V DC point only, not at the full 500 V DC operating voltage.

Why does a single DC line need a 2-pole breaker?

On the A9N61537 both poles are connected in series to reach the 500 V DC rating and to reliably extinguish the DC arc during a fault. Connection polarity is marked on the front of the device and must be observed, since a DC breaker only interrupts correctly when wired in the intended current direction.

Can I use a standard AC MCB instead on my solar strings?

No, and doing so is a genuine safety hazard. DC arcs do not self-extinguish at a zero-crossing the way AC arcs do, so an AC-rated MCB may fail to clear a DC fault and can overheat or catch fire. Always use a DC-rated device such as the C60H-DC on the DC side of a solar or battery system.

Do you stock the A9N61537 in Dubai and can you supply in bulk?

Yes. Electrical Junction stocks genuine Schneider Electric C60H-DC breakers at our Dubai counter for fast dispatch across the UAE and GCC, with walk-in collection available. For panel builders and solar EPC contractors we quote BOQ and bulk requirements the same day, with DC sizing checked by our engineer before dispatch.