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Schneider Electric A9KF21120BQ — 1-Pole MCB (DIN Rail)

Schneider Electric A9KF21120BQ Acti9 K60 MCB, 20 A, Curve B,

MPNA9KF21120BQ
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Schneider Electric Acti9 K60 miniature circuit breaker, A9KF21120BQ, 1P, 20 A, B-curve, 10 kA breaking capacity, DIN rail mount.

Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

A9KF21120BQ — Identification
ParameterValue
Product nameActi9 K60
Product / component typeMiniature circuit-breaker
Product rangeActi9
Device short nameK60H
Poles description1P
Number of protected poles1
Device applicationDistribution
A9KF21120BQ — Electrical & Protection
ParameterValue
Rated current (In)20 A
Tripping curve codeB
Magnetic tripping limit3...5 x In
Breaking capacity (Icu / AIR)10000 A Icn at 240 V AC 50/60 Hz conforming to EN/IEC 60898-1
Network type (AC/DC)AC
Network frequency50/60 Hz
Overvoltage categoryII
Trip unit technologyThermal-magnetic
Control / actuation typeToggle
Mechanical durability (cycles)20000 cycles
A9KF21120BQ — Mounting & Connection
ParameterValue
Terminal connections / wire rangeTunnel type terminals (downstream) 1...25 mm² rigid Tunnel type terminals (upstream) 1...25 mm² rigid Tunnel type terminals (downstream) 1...16 mm² flexible Tunnel type terminals (upstream) 1...16 mm² flexible
Mounting supportDIN rail
Mounting modeFixed
Width18 mm
Height81 mm
Depth70 mm
Tightening torque (by circuit)2 N.m top or bottom
A9KF21120BQ — Environmental
ParameterValue
Operating ambient temperature-5...55 °C
Storage ambient temperature-25...85 °C
IP degree of protectionIP20 conforming to IEC 60529
A9KF21120BQ — Approvals
ParameterValue
Conformity standardsEN/IEC 60898-1
A9KF21120BQ — Electrical
ParameterValue
[Ui] rated insulation voltage500 V AC 50/60 Hz
[Uimp] rated impulse withstand voltage4 kV

Product details

The Schneider Electric A9KF21120BQ is a 1-pole Acti9 K60 miniature circuit breaker (MCB) rated 20 A with a B-curve, designed for AC distribution in final subcircuits. It snaps onto a DIN rail (18 mm width per pole) and provides thermal-magnetic overcurrent protection per EN/IEC 60898-1.

B-curve tripping and what it means on the line

The B-curve (magnetic trip at 3 to 5 times the rated current, or 60 to 100 A for this 20 A unit) is the standard choice for resistive and general-purpose loads — lighting, small heaters, control transformers — where inrush is low. It holds through the 20 A continuous load and trips fast on a hard short. The thermal element handles sustained overloads; the magnetic element clears the fault. At 20 000 electrical cycles and the same mechanical endurance, this MCB is rated for routine switching in addition to protection duty.

Mounts on DIN rail, fixed position. Tunnel terminals accept 1 to 25 mm² rigid or 1 to 16 mm² flexible copper; strip 14 mm and torque to 2 N·m.

Frequently asked questions

Where can I buy A9KF21120BQ and how do I get a price?

This part is sourced and quoted to order against an RFQ through independent distribution. Submit a request for quote (RFQ) to confirm current availability and pricing at the time of your order.

What is the breaking capacity of A9KF21120BQ?

The breaking capacity is 10 000 A (Icn) at 240 V AC, 50/60 Hz, certified per EN/IEC 60898-1. This is the maximum fault current the breaker can safely interrupt under standard test conditions.

What compliance documentation does Schneider provide for A9KF21120BQ?

The MCB is certified to EN/IEC 60898-1 and carries tropicalisation class 2 per IEC 60068-1. Standard Schneider documentation includes a declaration of conformity covering the applicable EU directives; specific RoHS/REACH declarations are available from the manufacturer upon request.

MPN
A9KF21120BQ