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Schneider Electric A9N21373 — 1-Pole MCB (DIN Rail)

Schneider Electric A9N21373 Prodis DT40 MCB, D Curve, 4 A, 1

MPNA9N21373
Obsolete

Schneider Electric Prodis DT40, DT40N, miniature circuit breaker, D curve, 4 A, 1P+N, 6 kA / 10 kA breaking capacity, DIN rail clip-on, IP20.

Schneider Electric A9N21373 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

A9N21373 — Identification
ParameterValue
Product nameDT40
Product / component typeMiniature circuit-breaker
Product rangeProdis
Device short nameDT40N
Poles description1P + N
Number of protected poles1
Device applicationDistribution
A9N21373 — Electrical & Protection
ParameterValue
Rated current (In)4 A
Rated operational voltage (Ue)230 V AC 50 Hz between phase and neutral
Tripping curve codeD
Magnetic tripping limit10...14 x In
Breaking capacity (Icu / AIR)6000 A Icn at 230 V AC 50 Hz conforming to EN/IEC 60898-1 10 kA Icu at 230...240 V AC 50 Hz conforming to IEC 60947-2
Network type (AC/DC)AC
Network frequency50 Hz
Overvoltage categoryIV
Trip unit technologyThermal-magnetic
Control / actuation typeToggle
Mechanical durability (cycles)20000 cycles
A9N21373 — 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
A9N21373 — Environmental
ParameterValue
Operating ambient temperature-25...70 °C
Storage ambient temperature-40...70 °C
IP degree of protectionIP20 conforming to IEC 60529
A9N21373 — Approvals
ParameterValue
Conformity standardsEN/IEC 60898-1 EN/IEC 60947-2
A9N21373 — Electrical
ParameterValue
[Ui] rated insulation voltage400 V AC 50 Hz
[Uimp] rated impulse withstand voltage4 kV conforming to IEC 60947-2

Product details

The Schneider Electric A9N21373 is a Prodis DT40 miniature circuit breaker (MCB) with a D tripping curve, rated 4 A, 1P+N, and a breaking capacity of 6000 A Icn at 230 V AC (EN/IEC 60898-1) and 10 kA Icu at 230–240 V AC (IEC 60947-2). The dual standard rating means it can serve both domestic distribution boards (60898-1) and industrial panel applications (60947-2) under the same 4 A frame.

Clip-on mounting to standard DIN rail (35 mm per EN 60715). Tunnel terminals accept 0.33–10 mm² flexible or 0.75–16 mm² rigid upstream and downstream; strip length 13 mm, torque to 2 N·m.

Frequently asked questions

What is A9N21373's listed depth (78 mm) on this component line?

The depth is 78 mm, which fits standard DIN-rail enclosures and consumer units without protruding beyond the gland plate.

What is A9N21373's listed range (Prodis) on this component line?

It belongs to the Prodis range (also written ProDis), Schneider's residential and light-commercial MCB family, sold under the DT40 product name.

MPN
A9N21373