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Schneider Electric A9N21539 — 1-Pole MCB (DIN Rail)

Schneider Electric A9N21539 iDPN MCB, 25 A, Curve B, 1P+N, 4

MPNA9N21539
Obsolete

Schneider Electric Clario iDPN miniature circuit breaker, A9N21539, 25 A, Curve B, 1P+N, 4500 A breaking capacity at 230 V AC, DIN rail clip-on, IP20.

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

Specifications

A9N21539 — Identification
ParameterValue
Product nameIDPN
Product / component typeMiniature circuit-breaker
Product rangeClario
Device short nameiDPN
Poles description1P + N
Number of protected poles1
Device applicationDistribution
A9N21539 — Electrical & Protection
ParameterValue
Rated current (In)25 A
Rated operational voltage (Ue)230 V AC 50/60 Hz between phase and neutral
Tripping curve codeB
Magnetic tripping limit3...5 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
A9N21539 — 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
A9N21539 — Environmental
ParameterValue
Operating ambient temperature-25...70 °C
Storage ambient temperature-40...70 °C
IP degree of protectionIP20 conforming to IEC 60529
A9N21539 — Approvals
ParameterValue
Conformity standardsEN/IEC 60898-1
A9N21539 — 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

Certified protection for final distribution circuits

It provides overcurrent and short-circuit protection for single-phase final distribution circuits, wired as 1 pole + neutral (1P+N). The breaking capacity is 4500 A Icn at 230 V AC, 50/60 Hz, certified to EN/IEC 60898-1. The thermal-magnetic trip unit combines a bimetal strip for overload protection and a solenoid for short-circuit response.

Panel builders can plan for 18 mm per pole plus neutral — 36 mm total width for this 1P+N unit. Terminals accept flexible cable up to 10 mm² or rigid up to 16 mm², with a wire stripping length of 13 mm and a tightening torque of 2 N·m. The tunnel-type terminals are suitable for both upstream and downstream connections, simplifying wiring in a distribution board.

Frequently asked questions

What is the breaking capacity of the A9N21539?

The breaking capacity is 4500 A Icn at 230 V AC, 50/60 Hz, certified to EN/IEC 60898-1. This is the maximum fault current the breaker can safely interrupt under standard conditions.

Where can I buy the A9N21539 and get a price?

The A9N21539 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time.

MPN
A9N21539