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

Motor Power (AC‑3): 22kW at 200–240V; 40kW at 380–440V
Rated Operational Current: 80A (AC‑3); 105A for resistive load (AC‑1)
Operation Type: AC operation SC‑E4; DC coil SC‑E4/G (e.g. DC24V, DC110V)
Mounting: 35mm DIN rail / screw fixing; dimensions 67×130×112 mm; weight approx. 1.4 kg
Certifications: Compliant with IEC, UL, CSA; marked with CE; finger‑safe terminals for electric shock protection

Structure & Features

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

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

Coil options: AC110V, AC220V, AC380V, DC24V, DC110V; DC type (/G) suitable for unstable grids or DC control circuits

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

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

Typical Applications & Selection Notes

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

Model Example & Replacement

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

Replacement notes: Coil voltage, rated current, mounting dimensions, and auxiliary contact configuration must match; DC coils cannot directly replace AC coils

Installation & Maintenance Tips

Install vertically; avoid dusty, oily, or corrosive environments
Use crimped terminals for main circuit cables; follow torque specifications in the manual; control circuit wires ≤ 2.5 mm²
Regularly inspect contact erosion, loose wiring, and abnormal odors from the coil; replace main contacts or the entire contactor if necessary
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)

and

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

International First‑Tier Brands

Brand	Equivalent Model (AC/DC)	AC‑3 Rated Current	Motor Power at 380V	Width	Replacement Notes
Schneider	AC: LC1D80	80A	40kW	70mm	Top performance match, full parameter match; AC‑3/AC‑1 ratings identical to SC‑E4; mounting holes compatible; Chinese version includes 1NO+1NC aux contacts; global availability.
	Economy: LC1N80
	DC: LP1D80
ABB	AC: A95‑30‑11 / AF80‑30‑00	80A	40kW	70mm	Performance‑matched; AF series supports wide AC/DC coils, strong voltage fluctuation resistance; excellent arc interruption; suitable for heavy‑duty applications.
	DC: AF80‑30‑00 (wide voltage DC)
Siemens	AC: 3RT2038	80A	37kW/40kW	62mm	Compact S2 frame; full 80A AC‑3 match; built‑in 1NO+1NC aux contacts; compatible with 3RU2 thermal relays; logic matches SC‑E4 + TK‑E3.
	DC: 3RT2038 (DC coil suffix)
Eaton Moeller	AC: DILM80	80A	37kW/40kW	69mm	Performance‑matched; mechanical and electrical life equivalent to Fuji; direct‑mount thermal relay compatible; ideal for export projects and European standard cabinets.
	DC: DILM80 (DC coil suffix)

Japanese & Korean Equivalent Brands

Brand	Equivalent Model (AC/DC)	AC‑3 Rated Current	Motor Power at 380V	Width	Replacement Notes
Mitsubishi	AC: S‑M80 / S‑T80	80A	40kW	67mm	Direct interchangeable; same width, mounting holes, and terminal pitch; fully compatible auxiliary and thermal relay mounting.
	DC: SD‑T80
LS Electric (former LG)	AC: GMC‑85 / MC‑85a	85A	45kW	82mm	Performance‑matched with extra current margin; heavy‑duty rated; includes 1NO+1NC aux contacts; widely available.
	DC: GMD‑85

Mainstream Domestic Brands (Cost‑Effective Replacement)

Brand	Equivalent Model	AC‑3 Rated Current	Motor Power at 380V	Width	Replacement Notes
Chint	CJX2‑8011 / NC1‑8011	80A	40kW	70mm	Direct replacement; dimensions compatible with LC1D80 and SC‑E4; built‑in 1NO+1NC aux contacts; CCC/CE certified; cost‑effective.
Delixi	CJX2s‑8011 / CDC1‑8011	80A	40kW	70mm	Universal replacement; full parameter match; dual rail/screw mounting; silver alloy contacts; nationwide service.
TENGEN	CJX2‑8011 / TGC1‑8011	80A	40kW	70mm	Industrial‑grade replacement; improved surge & humidity resistance; suitable for harsh environments; meets tendering requirements.

Key Notes for Cross‑Brand Replacement

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.
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.
Thermal relay compatibility: Confirm rated current and mounting style after replacement; direct‑mount thermal relays must match the contactor frame.
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.