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Schneider Electric A9N21395 — Miniature Circuit Breakers (MCB)

Schneider Electric A9N21395 DT40N MCB, 3P 10A D Curve, 6kA/1

MPNA9N21395
Obsolete

Schneider Electric ProDis DT40N miniature circuit breaker, A9N21395, 3-pole 10 A, D curve, 6 kA Icn / 10 kA Icu at 400 V AC, clip-on DIN rail.

Schneider Electric A9N21395 datasheet (PDF)
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

A9N21395 — Identification
ParameterValue
Product nameDT40
Product rangeProdis
Product range (series)ProDis
Product/component typeMiniature circuit-breaker
Device applicationDistribution
A9N21395 — Ratings
ParameterValue
Rated current (In)10 A
Poles configuration3P
Number of protected poles3
Breaking capacity6000 A Icn at 400 V AC 50 Hz conforming to EN/IEC 60898-1 10 kA Icu at 400...415 V AC 50 Hz conforming to IEC 60947-2
Rated service breaking capacity (Ics)6000 A 100 % x Icn at 400 V AC 50 Hz conforming to EN/IEC 60898-1 7.5 kA 75 % x Icu at 400 V AC 50 Hz conforming to IEC 60947-2
Rated operational voltage (Ue)400 V AC 50 Hz between phases
Rated insulation voltage (Ui)440 V AC 50 Hz
Rated impulse withstand voltage (Uimp)4 kV conforming to IEC 60947-2
Network type (AC/DC)AC
Network frequency50 Hz
A9N21395 — Protection
ParameterValue
Curve codeD
Trip unit technologyThermal-magnetic
Magnetic tripping limit10...14 x In
Earth-leakage protectionSeparate block
Suitability for isolationYes
Limitation class3 conforming to EN/IEC 60898-1
Electrical durability (cycles)20000 cycles
Mechanical durability (cycles)20000 cycles
A9N21395 — Mechanical
ParameterValue
Mounting supportDIN rail
Mounting modeClip-on
Control typeToggle
Terminal connection typeTunnel 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
Terminal tightening torque2 N.m
Wire stripping length13 mm
Contact position indicatorYes
Local signalling/indicationON/OFF indication
Width54 mm
Height81 mm
Depth78 mm
Number of 9 mm pitches6
A9N21395 — Environmental
ParameterValue
Operating ambient temperature-25...70 °C
Storage ambient temperature-40...70 °C
IP degree of protectionIP20 conforming to IEC 60529
Pollution degree3 conforming to IEC 60947-2
Relative humidity95 % at 55 °C
Tropicalisation class2 conforming to IEC 60068-1
A9N21395 — Approvals
ParameterValue
StandardsEN/IEC 60898-1 EN/IEC 60947-2

Product details

Three poles protected, thermal-magnetic trip, and it carries both EN/IEC 60898-1 and EN/IEC 60947-2 certifications, meaning it's rated for both household-style and industrial branch-circuit duty.

The D curve means the magnetic trip fires at 10 to 14 times rated current — 100 to 140 A for this 10 A breaker. The 6 kA Icn (per EN/IEC 60898-1) is the service breaking capacity for general distribution; the 10 kA Icu (per IEC 60947-2) is the ultimate breaking capacity for industrial panels, so this breaker can interrupt a fault up to 10 kA at 400 V AC without failing.

Integration notes

Tunnel-type terminals accept 0.33 to 10 mm² flexible or 0.75 to 16 mm² rigid wire; strip length 13 mm, tighten to 2 N.m. The toggle gives local ON/OFF indication. If you need earth-leakage protection, a separate residual-current block can be added downstream.

Frequently asked questions

Where can I buy A9N21395 and get a price?

A9N21395 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 price and lead time.

What is the breaking capacity of A9N21395?

6 kA Icn at 400 V AC per EN/IEC 60898-1, and 10 kA Icu at 400...415 V AC per IEC 60947-2. The higher figure applies in industrial branch-circuit applications.

What does the D curve mean on this breaker?

The magnetic trip operates at 10 to 14 times the rated current (100–140 A for the 10 A version). That's designed for loads with high inrush current — motors, transformers, welding equipment — without nuisance tripping.

What compliance documentation does Schneider provide for A9N21395?

The breaker carries EN/IEC 60898-1 and EN/IEC 60947-2 certifications, NF quality label, and tropicalisation class 2 per IEC 60068-1. It is suitable for isolation per IEC 60947-2. RoHS and REACH declarations are standard for the ProDis range.

MPN
A9N21395