Contactor,întrerupător de circuit,senzor,Codificator,PLC,Convertor
Specificatii tehnice complete, Replacement Models and Selection Points for Fuji SC‑N4 (Seria NEO SC) 3‑Pole AC Contactor
- Specificații de bază
1.1 Parametrii circuitului principal
Polonii: 3 stâlpi; Contacte principale: 3NU; Contacte auxiliare standard: 2a2b (design dublu contact pentru o fiabilitate mai mare)
Curent nominal AC-3: 80 O; Puterea motorului corespunzătoare: 18.5 kW la 200–240 V, 37 kW at 380–440 V
Rated current AC‑1 / Thermal current: 135 O
Tensiunea nominală de izolație Ui: 690 V; Durata de viata mecanica: până la 10 milioane de operațiuni; Electrical life at AC‑3: 1 milioane de operațiuni
Certificari: IEC/EN 60947‑4‑1, UL, CSA, CE, CCC
1.2 Coil and Mounting
Available coil voltages: AC 100V, 200V, 220V, 380V; AC/DC universal type also available (de ex. SC‑N4/SE); Frecvenţă: 50/60 Hz
Dimensiuni (L×A×A): 88 × 117 × 127 mm; Greutate: aproximativ. 1.5 kg
Montare: Montare standard pe șină DIN sau șurub; Can be directly fitted with Fuji thermal overload relays (de ex. TR‑N4 series) to form a starter
- Cross‑Brand Replacement Models (Same Rating, Direct Interchangeable – Match Coil Voltage)
| Marca | Model de înlocuire | Note |
| Fuji (Actualizat) | SC‑N4/G (bobină DC), SC80BAS series | Mounting dimensions compatible; SC80BAS‑122 corresponds to SC‑N4/SE |
| Siemens | 3RT2036‑1BB40 (80 O, AC-3) | Același rating actual; check auxiliary contact count |
| Schneider | LC1D80 series (80 O, TeSys D) | Standard 2a2b configuration available |
| ABB | A185‑30‑11 (note current labeling difference) | Ensure AC‑3 80 A matching |
- Selection and Replacement Notes
- Coil voltage must be exact: Different voltages (AC200V vs AC220V, AC vs DC) are not interchangeable; otherwise coil burnout or failure to pull in will occur.
- Load type distinction: AC-3 (motor) 80 O, AC-1 (resistive/heating) 135 O; Do NOT use AC‑1 contactors for motor duty in place of AC‑3.
- Auxiliary contact quantity: SC‑N4 standard: 2NU+2NC; additional modules can be added if more contacts are required.
- Condiții de mediu: Protectie IP20, operating temp ‑5℃～+40℃; altitude ≤2000 m; humidity ≤85% non‑condensing.
- Arc extinction & val: Surge suppressor (RC or varistor) recommended across coil to reduce interference.
- Aplicații tipice
Commonly used for direct starting, star‑delta starting of three‑phase asynchronous motors up to 37 kW (380 V); also for power switching control in fans, pompe, mașini de turnat prin injecție, air compressors and other industrial equipment.
Fuji Contactor SC‑N4
de cumpărare & Replacement Checklist
(Can be sent directly to purchasing / warehouse / maintenance for ticking)
- Confirmarea modelului
Modelul principal: SC‑N4
Serie: Fuji NEO SC Series
Current rating: AC‑3 80A (for 37kW/380V motor)
- Key Parameters to Verify
- Contacte principale: 3 poles NO (3NU)
- Contacte auxiliare standard: 2a2b (2NU + 2NC)
- Curent nominal de operare:
AC-3 (motor): 80O
AC-1 (rezistiv): 135O
- Motor potrivit: 37kW la 380V
- Tensiunea bobinei (critic):
Comun: AC220V / AC380V / AC110V
tip DC: SC‑N4/G (bobină DC)
- Direct Cross‑Brand Replacement Table
| Marca | Model de înlocuire | Note |
| Fuji | SC80BAS | New replacement, aceleasi dimensiuni de montaj |
| Schneider | LC1D80 | 80O, 2a2b available |
| Siemens | 3RT2036 | 80O, general replacement |
| ABB | A185‑30 | AC‑3 80A equivalent |
> Replacement rule: 80O + same coil voltage + 2a2b auxiliary contacts
- 5‑Point Order & Installation Checklist
☐ Coil voltage matches exactly (AC/DC nu este interschimbabil)
☐ Auxiliary contacts: 2a2b (add modules if needed)
☐ For motors: must be AC‑3 80A class
☐ Mounting: DIN rail / screw fixing both supported
☐ If surge suppressor / rectifier needed: note in advance
- Accesorii standard
Matching thermal relay: TR‑N4 series
Optional add‑ons: side auxiliary contact modules, supresoare de supratensiune
Complete Accessory Model Manual for Fuji Contactor SC‑N4
Below is the dedicated accessory list for SC‑N4 (NEO SC series), sorted by function with exact models, specifications and matching points for direct purchasing and replacement.
- Core Matching Thermal Overload Relay (Necesar)
| Model | Interval de curent | Aplicație |
| TR‑N4 | 50–80 A | Dedicated for SC‑N4; clip‑on mounting, no extra wiring |
| TR‑N4/3 | 50–80 A | With phase failure protection |
| TR‑N4/2 | 50–80 A | Tip standard, rentabil |
Selecţie: Set thermal relay current to 1.1–1.25 × motor rated current
- Module de contact auxiliare (Control Circuit Expansion)
SC‑N4 standard: 2a2b; expandable via top / montaj lateral
| Montare | Model | Configurare contact | Note |
| Montajul superior | SZ‑A22T | 2NU+2NC | Max 1 unitate; cannot use with side mount |
| SZ‑A20T | 2NU | Add NO contacts | |
| SZ‑A11T | 1NU+1NC | General expansion | |
| SZ‑A02T | 2NC | Add NC contacts | |
| Side Mount | SZ‑AS22T | 2NU+2NC | Max 1 per side, 2 total |
| SZ‑AS20T | 2NU | Side NO expansion | |
| SZ‑AS11T | 1NU+1NC | Side general expansion | |
| SZ‑AS02T | 2NC | Side NC expansion |
> Regulă: Top and side mounting cannot be used together; total max 4a4b
- Surge Suppression Units
| Model | Aplicație | Funcţie |
| SZ‑Z | bobina AC | RC snubber, suppresses switching surge |
| SZ‑Z/DC | bobină DC | For SC‑N4/G, with freewheeling diode |
| SZ‑ZM | Circuitul principal | 3‑phase surge absorption for VFD/PLC protection |
> Nota: AC/DC coils require dedicated suppressors; not interchangeable
- Safety Protection Accessories
| Model | Nume | Funcţie |
| SZ‑N4T | Capac terminal | Covers main/aux terminals; prevents electric shock |
| SZ‑W | Live part cover | Enhances IP20 protection |
| SZ‑J | Operation counter | Mechanical counter for maintenance scheduling |
> Tip: SZ‑N4T is dedicated to SC‑N4; do NOT replace with larger models like SZ‑N8T
- Coil Optimization Accessories
| Model | Tip | Caracteristici |
| SZ‑GS/N4 | Super magnet coil | Economie de energie; low holding current, low temperature rise |
| SZ‑CD | IC output coil driver | For PLC transistor output; prevents coil burnout |
| SZ‑Y | Delay release unit | Adjustable off delay: 0.1–30 s |
> Nota: Super magnet coil requires SZ‑GS/N4 driver; not direct replacement
- Montare & Accesorii de cablare
| Model | Nume | Utilizare |
| SZ‑SP2 | 3‑phase parallel terminal block | For high current main circuit; reduces heating |
| SZ‑RW | Reversing wiring kit | For forward/reverse control; simplifies wiring |
| SZ‑B | Suport de montare | For non‑standard cabinet installation |
> Recommend SZ‑SP2 when cable > 16 mm²
- Replacement Parts (For Maintenance)
| Model | Part Name | Descriere |
| SC‑N4 Main Contact Set | Contacte principale | 3 NO silver alloy contacts; replace at end of life |
| SC‑N4 Auxiliary Contact Set | Contacte auxiliare | 2a2b contacts; replace if poor connection |
| SC‑N4 Coil | Magnetic Coil | Match original voltage (AC220V/380V etc.) |
> Întreţinere: Replace if main contact wear > 1 mm or aux contact resistance > 100 mΩ
- Accessory Selection Quick Guide (Prin Aplicație)
| Aplicație | Recommended Combination |
| Standard motor control | TR‑N4 + SZ‑Z + SZ‑N4T |
| Pornire frecventă | TR‑N4/3 + SZ‑GS/N4 + SZ‑J |
| Inverter control | TR‑N4 + SZ‑ZM + SZ‑CD |
| Forward/reverse control | TR‑N4 + SZ‑RW + 2× SZ‑AS22T |
