GE CK75CA300 AC380V Contactor: Complete Technical Guide for Industrial Automation

21 Januari 2026

Historical parts record: Photos and notes below belong to this record. Confirm the offered unit’s full model, condition and available test evidence before ordering.

What is the GE CK75CA300?

The CK75CA300 is a GE three-pole AC contactor rated at the CK75 frame's top of range: 300 A thermal current, 690 V rated insulation voltage (VDE 0660), for use on circuits delivering not more than 100,000 RMS symmetrical amperes at 600 V maximum — with the box label sizing the AC3 duty at 380-400 V / 75 kW (460 V / 80 HP, 480 V / 125 HP). The coil fitted is the EK4M100-127, accepting 100–127 V AC at 50-60 Hz or DC on its A1/A2 screw terminals — the AC 110 V control voltage the record lists. Each unit ships with a GE BCLL11 side-mounted auxiliary contact block (1 NO + 1 NC, Ith 10 A, Ue 600 V) already fitted. The identification is complete on the body and box: CK75CA300, REF No. 332891, cULus Listed 6CC1 (IND. CONT. EQ.), CCC A015846, CE — with one origin nuance reported as photographed: the contactor body reads MADE IN SPAIN while the carton label reads MADE IN POLAND. This record covers four factory-new units, each boxed QTY: 1 with the mounting hardware kit and multilingual manual, intake recorded 19 January 2026, record weight 3 kg. Seventeen photos and an inspection video document the contactors, coils, aux blocks and packaging.

4 min readContent reviewed 8 October 2026

Part details

CK75CA300, as read from the body marking and box label
Field	Value
Brand / model	GE CK75CA300 three-pole contactor, REF No. 332891, AS247
Main rating	Ith 300 A max, 600/600 V AC, max 30-60 °C/h; Ue 660 V (VDE 0660); GB14048.4
AC3 duty (box label)	380-400 V / 75 kW; 415 V row per label; 460 V / 80 HP; 480 V / 125 HP
Fault withstand	Suitable for circuits delivering not more than 100,000 RMS sym amperes, 600 V max
Coil	EK4M100-127 — 100-127 V AC (50-60 Hz)/DC, A1/A2 screw terminals
Aux contacts	GE BCLL11 MOD.1 side-mounted, 1 NO + 1 NC (13-14 / 21-22 / 43-44), Ith 10 A, Ue 600 V, torque 0.8 Nm — MADE IN SPAIN, AS612B
Terminals	1L1 / 3L2 / 5L3 line, 2T1 / 4T2 / 6T3 load, box-type blades with stud fixings; terminal torque 70 lb-in, CU wire 75 °C
Approvals	cULus Listed 6CC1 IND. CONT. EQ., CCC A015846, CE
Origin (as photographed)	Contactor body: MADE IN SPAIN; carton label: MADE IN POLAND — both shown as printed
Kit	Each box QTY: 1 — contactor, hardware set (screws, washers, nuts), multilingual manual (IB 33289)
Lot	4 factory-new units; intake 2026-01-19, record weight 3 kg

Scroll sideways to see the full table.

Values are read from the contactor body, the coil label, the aux-block label and the carton; the two origin printings are quoted as photographed.

A 300 A frame for heavy feeders

The CK75 series is GE's large-frame IEC contactor family, and the CA300 sits at its top: 300 amps of thermal current on three poles, which is motor-duty for drives in the 75 kW class at 400 V and, on the HP side of the label, 80-125 HP machines at US voltages. The box-type terminals take lugged cable on studs with the supplied hardware, torqued to the printed 70 lb-in, and the 100 kA withstand figure is what lets the contactor sit directly on a heavy feeder without a current-limiting fuse upstream. The mechanical slide on the cover shows contact state at a glance, and the EK4M coil — accepting anything from 100 to 127 V, AC or DC on the same winding — makes the control wiring forgiving of the supply scheme the panel already runs.

The four units here are one build, each sealed in its GE carton with the hardware bag and the IB 33289 manual: coils labelled EK4M100-127 with consecutive barcode marks, the Spanish-made contactor bodies and Spanish-made BCLL11 aux blocks, and the Polish-printed cartons — the full set of markings photographed so a buyer can reconcile them against their own purchasing records. For an MCC refresh, a genset panel or a large pump starter, a same-type four-pack covers a feeder and its standby, with two spares on the shelf.