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Especificações Técnicas Completas, Replacement Models and Selection Points for Fuji SC‑N4 (NEO SC Series) 3‑Pole AC Contactor
- Especificações principais
1.1 Parâmetros do Circuito Principal
Poloneses: 3 postes; Principais contatos: 3NÃO; Standard auxiliary contacts: 2a2b (double contact design for higher reliability)
Rated current AC‑3: 80 UM; Potência do motor correspondente: 18.5 kW at 200–240 V, 37 kW at 380–440 V
Rated current AC‑1 / Thermal current: 135 UM
Tensão nominal de isolamento Ui: 690 V; Vida mecânica: até 10 milhões de operações; Electrical life at AC‑3: 1 milhões de operações
Certificações: 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 (por exemplo. SC‑N4/SE); Freqüência: 50/60 Hz
Dimensões (L×P×A): 88 × 117 × 127 milímetros; Peso: aprox.. 1.5 kg
Montagem: Montagem padrão em trilho DIN ou parafuso; Can be directly fitted with Fuji thermal overload relays (por exemplo. TR‑N4 series) to form a starter
- Cross‑Brand Replacement Models (Same Rating, Direct Interchangeable – Match Coil Voltage)
| Marca | Modelo de substituição | Notas |
| Fuji (Atualizado) | SC‑N4/G (Bobina CC), SC80BAS series | Mounting dimensions compatible; SC80BAS‑122 corresponds to SC‑N4/SE |
| Siemens | 3RT2036‑1BB40 (80 UM, AC-3) | Mesma classificação atual; check auxiliary contact count |
| Schneider | LC1D80 series (80 UM, 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 UM, AC‑1 (resistive/heating) 135 UM; Do NOT use AC‑1 contactors for motor duty in place of AC‑3.
- Auxiliary contact quantity: SC‑N4 standard: 2NÃO+2NC; additional modules can be added if more contacts are required.
- Condições ambientais: Proteção IP20, operating temp ‑5℃～+40℃; altitude ≤2000 m; humidity ≤85% non‑condensing.
- Extinção de arco & surge: Surge suppressor (RC or varistor) recommended across coil to reduce interference.
- Aplicações Típicas
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, bombas, máquinas de moldagem por injeção, air compressors and other industrial equipment.
Fuji Contactor SC‑N4
Compras & Replacement Checklist
(Can be sent directly to purchasing / warehouse / maintenance for ticking)
- Confirmação do modelo
Main model: SC-N4
Série: Fuji NEO SC Series
Current rating: AC‑3 80A (for 37kW/380V motor)
- Key Parameters to Verify
- Principais contatos: 3 poles NO (3NÃO)
- Standard auxiliary contacts: 2a2b (2NÃO + 2NC)
- Corrente operacional nominal:
AC-3 (motor): 80UM
AC‑1 (resistive): 135UM
- Suitable motor: 37kW a 380V
- Tensão da bobina (crítico):
Comum: AC220V / AC380V / AC110V
Tipo CC: SC‑N4/G (Bobina CC)
- Direct Cross‑Brand Replacement Table
| Marca | Modelo de substituição | Notas |
| Fuji | SC80BAS | New replacement, same mounting dimensions |
| Schneider | LC1D80 | 80UM, 2a2b available |
| Siemens | 3RT2036 | 80UM, general replacement |
| ABB | A185‑30 | AC‑3 80A equivalent |
> Replacement rule: 80UM + same coil voltage + 2a2b auxiliary contacts
- 5‑Point Order & Installation Checklist
☐ Coil voltage matches exactly (AC/DC não intercambiável)
☐ Auxiliary contacts: 2a2b (add modules if needed)
☐ For motors: must be AC‑3 80A class
☐ Mounting: Trilho DIN / screw fixing both supported
☐ If surge suppressor / rectifier needed: note in advance
- Acessórios padrão
Matching thermal relay: TR‑N4 series
Optional add‑ons: side auxiliary contact modules, supressores de surto
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 (Obrigatório)
| Modelo | Faixa Atual | Aplicativo |
| TR‑N4 | 50–80 A | Dedicated for SC‑N4; clip‑on mounting, sem fiação extra |
| TR‑N4/3 | 50–80 A | With phase failure protection |
| TR‑N4/2 | 50–80 A | Tipo padrão, custo-benefício |
Seleção: Set thermal relay current to 1.1–1.25 × motor rated current
- Auxiliary Contact Modules (Control Circuit Expansion)
SC‑N4 standard: 2a2b; expandable via top / side mounting
| Montagem | Modelo | Configuração de contato | Notas |
| Top Mount | SZ‑A22T | 2NÃO+2NC | Máx. 1 unidade; cannot use with side mount |
| SZ‑A20T | 2NÃO | Add NO contacts | |
| SZ‑A11T | 1NÃO+1NC | General expansion | |
| SZ‑A02T | 2NC | Add NC contacts | |
| Side Mount | SZ‑AS22T | 2NÃO+2NC | Máx. 1 per side, 2 total |
| SZ‑AS20T | 2NÃO | Side NO expansion | |
| SZ‑AS11T | 1NÃO+1NC | Side general expansion | |
| SZ‑AS02T | 2NC | Side NC expansion |
> Rule: Top and side mounting cannot be used together; total max 4a4b
- Surge Suppression Units
| Modelo | Aplicativo | Função |
| SZ‑Z | AC coil | Amortecedor RC, suppresses switching surge |
| SZ‑Z/DC | Bobina CC | For SC‑N4/G, with freewheeling diode |
| SZ‑ZM | Circuito principal | 3‑phase surge absorption for VFD/PLC protection |
> Observação: AC/DC coils require dedicated suppressors; not interchangeable
- Safety Protection Accessories
| Modelo | Nome | Função |
| SZ‑N4T | Tampa do 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
| Modelo | Tipo | Características |
| SZ‑GS/N4 | Super magnet coil | Economia de energia; low holding current, aumento de baixa temperatura |
| 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 |
> Observação: Super magnet coil requires SZ‑GS/N4 driver; not direct replacement
- Montagem & Wiring Accessories
| Modelo | Nome | Uso |
| 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 | Suporte de montagem | For non‑standard cabinet installation |
> Recommend SZ‑SP2 when cable > 16 mm²
- Peças de reposição (For Maintenance)
| Modelo | Part Name | Descrição |
| SC‑N4 Main Contact Set | Principais Contatos | 3 NO silver alloy contacts; replace at end of life |
| SC‑N4 Auxiliary Contact Set | Contatos Auxiliares | 2a2b contacts; replace if poor connection |
| SC‑N4 Coil | Magnetic Coil | Match original voltage (AC220V/380V etc.) |
> Manutenção: Replace if main contact wear > 1 mm or aux contact resistance > 100 mΩ
- Accessory Selection Quick Guide (By Application)
| Aplicativo | Recommended Combination |
| Standard motor control | TR‑N4 + SZ‑Z + SZ‑N4T |
| Partida frequente | 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 |
