Fuji SC-N4 3 極 AC コンタクタ

Complete Technical Specifications, Replacement Models and Selection Points for Fuji SC‑N4 (NEO SC Series) 3‑Pole AC Contactor

1. Core Specifications

1.1 主回路パラメータ

極: 3 極; 主な連絡先: 3いいえ; Standard auxiliary contacts: 2a2b (double contact design for higher reliability)

Rated current AC‑3: 80 あ; Corresponding motor power: 18.5 kW at 200–240 V, 37 kW at 380–440 V

Rated current AC‑1 / Thermal current: 135 あ

定格絶縁電圧Ui: 690 V; 機械的寿命: まで 10 100万操作; Electrical life at AC‑3: 1 100万操作

認証: 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 (例えば. SC‑N4/SE); 頻度: 50/60 Hz

寸法 (幅×奥行き×高さ): 88 × 117 × 127 mm; 重さ: 約. 1.5 kg

取り付け: Standard DIN rail or screw mounting; Can be directly fitted with Fuji thermal overload relays (例えば. TR‑N4 series) to form a starter

2. Cross‑Brand Replacement Models (Same Rating, Direct Interchangeable – Match Coil Voltage)

3. Selection and Replacement Notes
4. 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.
5. Load type distinction: AC-3 (モーター) 80 あ, AC-1 (resistive/heating) 135 あ; Do NOT use AC‑1 contactors for motor duty in place of AC‑3.
6. Auxiliary contact quantity: SC‑N4 standard: 2NO+2NC; additional modules can be added if more contacts are required.
7. Ambient conditions: IP20保護, operating temp ‑5℃～+40℃; altitude ≤2000 m; humidity ≤85% non‑condensing.
8. Arc extinction & surge: Surge suppressor (RC or varistor) recommended across coil to reduce interference.
9. 代表的な用途

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, パンプス, injection molding machines, air compressors and other industrial equipment.

Fuji Contactor SC‑N4

Purchasing & Replacement Checklist

(Can be sent directly to purchasing / warehouse / maintenance for ticking)

1. Model Confirmation

Main model: SC‑N4

シリーズ: Fuji NEO SC Series

Current rating: AC‑3 80A (for 37kW/380V motor)

2. Key Parameters to Verify
3. 主な連絡先: 3 poles NO (3いいえ)
4. Standard auxiliary contacts: 2a2b (2いいえ + 2ノースカロライナ州)
5. 定格動作電流:

AC-3 (モーター): 80あ

AC-1 (resistive): 135あ

4. Suitable motor: 37380VでkW
5. コイル電圧 (致命的):

Common: AC220V / AC380V / AC110V

直流タイプ: SC‑N4/G (DCコイル)

3. Direct Cross‑Brand Replacement Table

> Replacement rule: 80あ + same coil voltage + 2a2b auxiliary contacts

4. 5‑Point Order & Installation Checklist

☐ Coil voltage matches exactly (AC/DC not interchangeable)

☐ 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

5. Standard Accessories

Matching thermal relay: TR‑N4 series

Optional add‑ons: side auxiliary contact modules, surge suppressors

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.

1. Core Matching Thermal Overload Relay (Required)

選択: Set thermal relay current to 1.1–1.25 × motor rated current

2. Auxiliary Contact Modules (Control Circuit Expansion)

SC‑N4 standard: 2a2b; expandable via top / side mounting

> Rule: Top and side mounting cannot be used together; total max 4a4b

3. Surge Suppression Units

> 注記: AC/DC coils require dedicated suppressors; not interchangeable

4. Safety Protection Accessories

> Tip: SZ‑N4T is dedicated to SC‑N4; do NOT replace with larger models like SZ‑N8T

5. Coil Optimization Accessories

> 注記: Super magnet coil requires SZ‑GS/N4 driver; not direct replacement

6. 取り付け & Wiring Accessories

> Recommend SZ‑SP2 when cable > 16 mm²

7. Replacement Parts (For Maintenance)

> メンテナンス: Replace if main contact wear > 1 mm or aux contact resistance > 100 mΩ

8. Accessory Selection Quick Guide (By Application)