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Schneider Electric A9N21549 — 1-Pole MCB (DIN Rail)

Schneider Electric A9N21549 iDPN MCB, 25 A, C Curve, 1P+N

MPNA9N21549
Obsolete

Schneider Electric Clario iDPN miniature circuit breaker, A9N21549, 25 A rated current, C curve, 1P+N, 4500 A breaking capacity at 230 V AC, DIN rail clip-on.

Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

A9N21549 — Identification
ParameterValue
Product nameIDPN
Product / component typeMiniature circuit-breaker
Product rangeClario
Device short nameiDPN
Poles description1P + N
Number of protected poles1
Device applicationDistribution
A9N21549 — Electrical & Protection
ParameterValue
Rated current (In)25 A
Rated operational voltage (Ue)230 V AC 50/60 Hz between phase and neutral
Tripping curve codeC
Magnetic tripping limit5...10 x In
Breaking capacity (Icu / AIR)4500 A Icn at 230 V AC 50/60 Hz conforming to EN/IEC 60898-1
Network type (AC/DC)AC
Network frequency50/60 Hz
Trip unit technologyThermal-magnetic
Control / actuation typeToggle
Mechanical durability (cycles)20000 cycles
A9N21549 — Mounting & Connection
ParameterValue
Terminal connections / wire rangeTunnel type terminals downstream 0.33...10 mm² flexible Tunnel type terminals downstream 0.75...16 mm² rigid Tunnel type terminals upstream 0.33...10 mm² flexible Tunnel type terminals upstream 0.75...16 mm² rigid
Mounting supportDIN rail
Mounting modeClip-on
Width18 mm
Height81 mm
Depth78 mm
Tightening torque (by circuit)2 N.m
A9N21549 — Environmental
ParameterValue
Operating ambient temperature-25...70 °C
Storage ambient temperature-40...70 °C
IP degree of protectionIP20 conforming to IEC 60529
A9N21549 — Approvals
ParameterValue
Conformity standardsEN/IEC 60898-1
A9N21549 — Electrical
ParameterValue
[Ui] rated insulation voltage400 V AC 50/60 Hz conforming to IEC 60947-2
[Uimp] rated impulse withstand voltage4 kV conforming to IEC 60947-2

Product details

The Schneider Electric A9N21549 is an iDPN miniature circuit breaker from the Clario range, rated 25 A with a C curve and 1P+N configuration. The 4500 A Icn breaking capacity at 230 V AC, certified to EN/IEC 60898-1, covers typical domestic fault levels — it clears a short-circuit up to that current without welding the contacts or damaging the enclosure.

The A9N21549 ships as a single MCB unit — no separate neutral block or busbar included. The tunnel-type terminals accept 0.33 to 10 mm² flexible or 0.75 to 16 mm² rigid on both upstream and downstream sides. The clip-on mount snaps onto a standard 35 mm DIN rail, occupying 2 x 9 mm pitches (18 mm wide). The neutral is on the left, the protected pole on the right. IP20 finger-safe terminals are standard for panel installation.

Frequently asked questions

What is A9N21549's breaking capacity and what does that mean for my panel?

The A9N21549 has a 4500 A Icn breaking capacity at 230 V AC per EN/IEC 60898-1. That means it can safely interrupt a short-circuit fault up to 4500 A without welding contacts or causing enclosure damage — sufficient for most residential and light commercial distribution boards where the prospective fault current is below that level.

What is the closest alternative to A9N21549 in the same family?

Within the iDPN range, the closest sibling is the same physical footprint and curve code but a different current rating — for example, a 16 A or 32 A variant. The A9N21549 is the 25 A C-curve 1P+N version; the only difference is the thermal-magnetic trip setting. All share the same DIN-rail clip-on mount, terminal wire range, and breaking capacity.

Where can I buy A9N21549 and what is the lead time?

The A9N21549 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — submit an RFQ for a firm lead time and price.

MPN
A9N21549