Skip to main content
Log in
Schneider Electric A9N26500 — Miniature Circuit Breakers (MCB)

A9N26500 Acti9 iMSU Overvoltage Release, 255-400V, Obsolete

MPNA9N26500
Obsolete

Schneider Electric Acti9 iMSU overvoltage release, A9N26500, threshold 255-400V, 230V AC control circuit, 18mm wide, DIN rail mount, EN 50550.

$108.36 – $114.59Ref. price · indicative, final on quote
Schneider Electric A9N26500 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

A9N26500 — Identification
ParameterValue
Product range (series)Acti9
Product/component typeOvervoltage release
A9N26500 — Mechanical
ParameterValue
Mounting support35 mm symmetrical DIN rail
Mounting modeFixed
Terminal connection typeScrew clamp terminal (bottom) - 2 cable(s) 1.5 mm² - flexible Screw clamp terminal (bottom) - 2 cable(s) 1.5 mm² - flexible with ferrule Screw clamp terminal (bottom) - 1 cable(s) 0.5...2.5 mm² - rigid
Terminal tightening torque1 N.m bottom
Wire stripping length9 mm 10 mm for bottom connection
Local signalling/indicationAction indicator
Width18 mm
Height82.5 mm
Depth73.5 mm
Number of 9 mm pitches2
A9N26500 — Environmental
ParameterValue
Operating ambient temperature-25...50 °C
Storage ambient temperature-40...85 °C
Relative humidity95 % at 55 °C
Tropicalisation class2
A9N26500 — Approvals
ParameterValue
StandardsEN 50550

Product details

It monitors the control circuit at 230 V AC 50/60 Hz and trips according to a stepped curve: 255-275 V in 3-15 s, 300 V in 1-5 s, 350 V in 0.25-0.75 s, and 400 V in 0.07-0.2 s. That means it catches sustained swells before they damage downstream equipment, while ignoring brief transients that wouldn't harm anything.

At 18 mm wide (2 x 9 mm pitches), it occupies a single module slot. Depth is 73.5 mm, height 82.5 mm. Tightening torque is 1 N·m; strip length 9-10 mm. Top-side comb busbar compatible.

This part is marked obsolete by the manufacturer. If you're freezing a new design, look at the current Acti9 overvoltage release range; the iMSU form factor and trip characteristics have evolved, so verify the trip curve and DIN footprint against your panel layout.

Built to EN 50550, the European standard for power-frequency overvoltage protective devices (POPs). CE marked. The local action indicator gives a visual trip signal, which helps during fault-finding without needing to meter the circuit.

Frequently asked questions

Where can I buy A9N26500?

The A9N26500 is sourced and quoted to order against an RFQ through independent distribution. Availability and current pricing are confirmed at quote time — no stock figures or lead-time numbers are published for this obsolete line.

What does the EN 50550 standard mean for this overvoltage release?

EN 50550 is the European product standard for power-frequency overvoltage protective devices (POPs). It defines the trip accuracy, response times, and safety requirements for devices that protect installations from sustained overvoltages on the mains supply. The A9N26500's stepped trip curve (255-400 V) is designed to meet that standard's coordination requirements.

What is the width and depth of A9N26500?

The A9N26500 is 18 mm wide (2 x 9 mm pitches) and 73.5 mm deep. Height is 82.5 mm. It mounts on 35 mm DIN rail and occupies one standard module slot in a distribution board.

MPN
A9N26500