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Schneider Electric A9C21843 — Contactors

Schneider Electric A9C21843 Acti9 iCT Contactor, 3P, 40 A AC

MPNA9C21843
Active

Schneider Electric Acti9 iCT contactor, A9C21843, 3P, 40 A AC-7A, 400 V AC, 220-240 V AC 50 Hz coil, clip-on 35 mm DIN rail, IP20.

$54.58Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

A9C21843 — Identification
ParameterValue
Product / component typeContactor
A9C21843 — Ratings & Performance
ParameterValue
Rated operational voltage (Ue)400 V AC 50 Hz
A9C21843 — Environmental
ParameterValue
IP degree of protectionIP20
Operating altitude2000 m
A9C21843 — Approvals
ParameterValue
StandardsIEC/EN 61095
A9C21843 — Mechanical
ParameterValue
Width54 mm
Height85 mm
Depth60 mm

Product details

It clips onto a 35 mm symmetrical DIN rail and is rated for 40 A in AC-7A duty (general-use inductive loads) and 15 A in AC-7B duty (motor loads) at 400 V AC, 50 Hz. The coil is 220-240 V AC, maintained control signal type.

The 40 A AC-7A rating covers resistive and lightly inductive loads like heating banks or lighting circuits. The 15 A AC-7B rating is the one to check for motor switching — it reflects the higher inrush and inductive break duty typical of small pumps, fans, or compressors. Electrical durability is specified per duty cycle: 100,000 cycles at 40 A AC-7A, 30,000 cycles at 15 A AC-7B, and 30,000 cycles under AC-3 (cage motor starting). Mechanical durability is 1,000,000 cycles, so the contactor outlasts its electrical life in most applications. The contactor is tropicalised (2 levels conforming to EN 60947-4-1 and EN 61095), meaning it withstands 95% relative humidity at 55 °C without performance degradation — relevant for panels in coastal or unconditioned spaces.

The 54 mm width (9 mm pitches × 6) fits standard modular enclosure spacing. Power circuit terminals accept 6-25 mm² rigid or 6-16 mm² flexible cable; control circuit terminals accept 1.5-2.5 mm². The action indicator provides local signalling of contactor state.

Frequently asked questions

What are the key ratings for A9C21843?

3-pole contactor, 40 A AC-7A / 15 A AC-7B at 400 V AC, 50 Hz. Coil 220-240 V AC. Rated insulation voltage 500 V AC. Electrical durability 100,000 cycles at 40 A AC-7A, 30,000 cycles at 15 A AC-7B.

What is the mounting and wiring requirement?

Clip-on to 35 mm symmetrical DIN rail. Power terminals accept 6-25 mm² rigid or 6-16 mm² flexible cable; control terminals accept 1.5-2.5 mm². Tightening torque 3.5 N·m (power) and 0.8 N·m (control).

MPN
A9C21843