Fuji Electric SC‑E4 contactor

Fuji Electric SC‑E4 (including SC‑E4/G DC type) 3‑pole electromagnetic contactor. This is a main model in the SC‑E series with an 80A frame, used for industrial motor control.

Key Rated Parameters

1. Motor Power (AC‑3): 22kW at 200–240V; 40kW at 380–440V
2. Rated Operational Current: 80ก (AC‑3); 105A for resistive load (AC‑1)
3. Operation Type: AC operation SC‑E4; DC coil SC‑E4/G (e.g. ดีซี24วี, DC110V)
4. Mounting: 35ราง DIN มม / screw fixing; dimensions 67×130×112 mm; weight approx. 1.4 กก
5. การรับรอง: Compliant with IEC, แอล, ซีเอสเอ; marked with CE; finger‑safe terminals for electric shock protection

Structure & คุณสมบัติ

3‑pole main circuit, standard without auxiliary contacts (auxiliary modules such as SZ‑AS1T can be side‑mounted to expand 1a1b / 2ก / 2b)

Direct‑connect main terminal design for easier wiring; safety structure to prevent exposed live parts

Coil options: AC110V, ไฟ AC220V, AC380V, ดีซี24วี, DC110V; DC type (/ช) suitable for unstable grids or DC control circuits

Compatible thermal overload relay: TK‑E3 series, for overload, locked‑rotor, and phase‑failure protection

อุณหภูมิแวดล้อม: -5℃ to +55℃ (non‑condensing); altitude ≤ 2000 m

การใช้งานทั่วไป & Selection Notes

1. For direct starting, star‑delta starting, and soft‑starting of 40kW (380–440V) / 22กิโลวัตต์ (200–240V) three‑phase asynchronous motors
2. Selection must confirm: coil voltage, number of auxiliary contacts, control circuit voltage, จัดอันดับปัจจุบัน, duty category (AC‑3/AC‑1), and whether surge suppressors are required
3. Comparable competitive models: Schneider LC1‑D80, ABB A145‑30‑11, Siemens 3RT2036

ตัวอย่างโมเดล & Replacement

Model designation: SC‑E4 AC220V (AC coil); SC‑E4/G DC24V (DC coil)

Replacement notes: แรงดันไฟฟ้าคอยล์, จัดอันดับปัจจุบัน, mounting dimensions, and auxiliary contact configuration must match; DC coils cannot directly replace AC coils

Installation & เคล็ดลับการบำรุงรักษา

1. ติดตั้งในแนวตั้ง; avoid dusty, oily, or corrosive environments
2. Use crimped terminals for main circuit cables; follow torque specifications in the manual; control circuit wires ≤ 2.5 mm²
3. Regularly inspect contact erosion, loose wiring, and abnormal odors from the coil; replace main contacts or the entire contactor if necessary
4. Connect RC circuits or varistors in parallel to suppress coil surge and protect PLC output points

Cross‑Brand Model Cross‑Reference & Replacement Guide for Fuji SC‑E4

The following cross‑reference is based on the core parameters of the Fuji SC‑E4, categorized into international first‑tier brands, Japanese/Korean equivalent brands, and mainstream domestic brands.

Two types are distinguished:

Performance‑matched (fully matching parameters, universal function)

และ

Direct interchangeable (compatible mounting dimensions and terminal positions, replaceable without cabinet modification).

1. International First‑Tier Brands

2. Japanese & Korean Equivalent Brands

3. Mainstream Domestic Brands (Cost‑Effective Replacement)

Key Notes for Cross‑Brand Replacement

1. Coil specification must be 1:1 matched: AC coils (AC110V/220V/380V) and DC coils (DC24V/DC110V) cannot be interchanged. SC‑E4/G DC type can only be replaced by the same DC voltage model.
2. Auxiliary contact logic matching: SC‑E4 has no built‑in auxiliary contacts. If the replacement model includes aux contacts, verify NO/NC logic in the PLC program to avoid malfunction.
3. Thermal relay compatibility: Confirm rated current and mounting style after replacement; direct‑mount thermal relays must match the contactor frame.
4. Cabinet space: Direct‑interchangeable models can be installed without modification. For performance‑matched models, verify width, height, and depth to avoid door interference or busbar conflict.