| Manufacturer part number (MPN) | NZMH2-A20-S1 |
| Series | Eaton NZM2 (Moeller series NZM) |
| Type | Molded-case circuit breaker (MCCB) |
| Breaking-capacity class | H (high breaking capacity) |
| Number of poles | 3-Pole |
| Rated current (In) | 20 A |
| Frame size | NZM2 (up to 250 A) |
| Rated operational voltage (Ue) | 1000 V AC |
| Rated insulation voltage (Ui) | 800 V |
| Rated ultimate short-circuit breaking capacity (Icu) at 400/415 V AC | 150 kA |
| Trip unit / release | Thermomagnetic release — adjustable thermal overload and electromagnetic short-circuit protection |
| Utilization category | A |
| Suitable for isolation | Yes |
| Standard | IEC/EN 60947-2 |
| Configuration | 1000 V AC circuit-breaker (NZM…-S1 range) |
| EAN / GTIN | 4015082903558 |
| HS code | 8536.20 |
| Sales unit | pcs |
| Eaton catalogue number | 290355 |
| Depth | 149 mm |
| Height | 184 mm |
| Width | 105 mm |
| Weight | 2.345 kg |
| Compliances | RoHS conform |
| Certifications | IEC |
| Functions | System and cable protection |
| Amperage Rating | 20 A |
| Circuit breaker frame type | NZM2 |
| Features | Protection unit; Motor drive optional |
| Release system | Thermomagnetic release |
| Special features | Lifespan, mechanical: of which max. 50 % trip by shunt/undervoltage release NZM...S1 terminal type: NZM...XKSA cover required Rated current = rated uninterrupted current: 20 A Terminal capacity hint: Up to 240 mm² can be connected depending on the cable manufacturer. |
| Ambient operating temperature - max | 70 °C |
| Ambient storage temperature - max | 70 °C |
| Ambient operating temperature - min | -25 °C |
| Equipment heat dissipation, current-dependent | 5.1 W |
| Rated operational current for specified heat dissipation (In) | 20 A |
| Electrical connection type of main circuit | Screw connection |
| Handle type | Rocker lever |
| Instantaneous current setting (Ii) - max | 350 A |
| Instantaneous current setting (Ii) - min | 350 A |
| Lifespan, electrical | 3000 operations at 1000 V AC-1 |
| Number of operations per hour - max | 120 |
| Overload current setting (Ir) - max | 20 A |
| Overload current setting (Ir) - min | 15 A |
| Overvoltage category | III |
| Pollution degree | 3 |
| Rated impulse withstand voltage (Uimp) at auxiliary contacts | 6000 V |
| Rated impulse withstand voltage (Uimp) at main contacts | 8000 V |
| Rated short-circuit making capacity Icm at 1000 V |
| 50/60 Hz | 17 kA |
| Rated short-circuit making capacity Icm at 240 V |
| 50/60 Hz | 330 kA |
| Rated short-circuit making capacity Icm at 400/415 V |
| Rated short-circuit making capacity Icm at 440 V |
| 50/60 Hz | 286 kA |
| Rated short-circuit making capacity Icm at 525 V |
| 50/60 Hz | 105 kA |
| Rated short-circuit making capacity Icm at 690 V |
| 50/60 Hz | 40 kA |
| Rated short-time withstand current (t = 0.3 s) | 1.9 kA |
| Rated short-time withstand current (t = 1 s) | 1.9 kA |
| Short-circuit release non-delayed setting - max | 350 A |
| Short-circuit release non-delayed setting - min | 350 A |
| Voltage rating | 1000 V - 1000 V |
| Degree of protection | IP20 |
| Lifespan, mechanical | 20000 operations |
| Mounting Method | DIN rail (top hat rail) mounting optional; Built-in device fixed built-in technique; Fixed |
| Number of auxiliary contacts (change-over contacts) | 0 |
| Number of auxiliary contacts (normally closed contacts) | 0 |
| Number of auxiliary contacts (normally open contacts) | 0 |
| Position of connection for main current circuit | Front side |
| Standard terminals | Screw terminal |
| Terminal capacity (aluminum solid conductor/cable) | 16 mm² (1x) at tunnel terminal |
| Terminal capacity (aluminum stranded conductor/cable) | 25 mm² - 185 mm² (1x) at tunnel terminal |
| Terminal capacity (control cable) | 0.75 mm² - 1.5 mm² (2x); 0.75 mm² - 2.5 mm² (1x) |
| Terminal capacity (copper busbar) | Max. 24 mm x 8 mm direct at switch rear-side connection; Min. 16 mm x 5 mm direct at switch rear-side connection; M8 at rear-side screw connection |
| Terminal capacity (copper solid conductor/cable) | 10 mm² - 16 mm² (1x) direct at switch rear-side connection; 10 mm² - 16 mm² (2x) direct at switch rear-side connection; 10 mm² - 16 mm² (1x) at box terminal; 6 mm² - 16 mm² (2x) at box terminal; 16 mm² (1x) at tunnel terminal |
| Terminal capacity (copper stranded conductor/cable) | 25 mm² - 185 mm² (1x) at tunnel terminal; 25 mm² - 185 mm² (1x) at box terminal; 25 mm² - 70 mm² (2x) at box terminal; 25 mm² - 50 mm² (2x) direct at switch rear-side connection |
| Terminal capacity (copper strip) | Max. 8 segments of 24 mm x 1 mm (2x) at box terminal; Max. 10 segments of 16 mm x 0.8 mm at rear-side connection (punched); Min. 2 segments of 9 mm x 0.8 mm at box terminal; Max. 10 segments of 16 mm x 0.8 mm at box terminal; Min. 2 segments of 16 mm x 0.8 mm at rear-side connection (punched) |
