Schneider Electric A9N21398
MPNA9N21398
Obsolete
DT40 - circuit breaker - DT40N - 3P - 25A - D curve
StockContact for availability
MOQ1 pcs
Sourced new & surplus through independent channelsListing updated Jun 2026
Specifications
Identification
| Parameter | Value |
|---|---|
| Product name | DT40 |
| Product range | Prodis |
| Product range (series) | ProDis |
| Product/component type | Miniature circuit-breaker |
| Device application | Distribution |
Ratings
| Parameter | Value |
|---|---|
| Rated current (In) | 25 A |
| Poles configuration | 3P |
| Number of protected poles | 3 |
| Breaking capacity | 6000 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 frequency | 50 Hz |
Protection
| Parameter | Value |
|---|---|
| Curve code | D |
| Trip unit technology | Thermal-magnetic |
| Magnetic tripping limit | 10...14 x In |
| Earth-leakage protection | Separate block |
| Suitability for isolation | Yes |
| Limitation class | 3 conforming to EN/IEC 60898-1 |
| Electrical durability (cycles) | 10000 cycles |
| Mechanical durability (cycles) | 20000 cycles |
Mechanical
| Parameter | Value |
|---|---|
| Mounting support | DIN rail |
| Mounting mode | Clip-on |
| Control type | Toggle |
| Terminal connection type | Tunnel 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 torque | 2 N.m |
| Wire stripping length | 13 mm |
| Contact position indicator | Yes |
| Local signalling/indication | ON/OFF indication |
| Width | 54 mm |
| Height | 81 mm |
| Depth | 78 mm |
| Number of 9 mm pitches | 6 |
Environmental
| Parameter | Value |
|---|---|
| Operating ambient temperature | -25...70 °C |
| Storage ambient temperature | -40...70 °C |
| IP degree of protection | IP20 conforming to IEC 60529 |
| Pollution degree | 3 conforming to IEC 60947-2 |
| Relative humidity | 95 % at 55 °C |
| Tropicalisation class | 2 conforming to IEC 60068-1 |
Approvals
| Parameter | Value |
|---|---|
| Standards | EN/IEC 60898-1 EN/IEC 60947-2 |
MPN
A9N21398