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LC1(CJX2) Series Contactor
The LC1(CJX2) Series Contactor is a three-phase AC contactor designed for frequent starting, stopping, and remote...
Product Overview
What This Model Does
The LC1(CJX2) Series Contactor is a three-phase AC contactor designed for frequent starting, stopping, and remote control of AC motors in industrial and commercial applications. It operates at 50/60Hz, supports rated insulation voltage up to 1000V, and handles rated operation current from 9A to 330A under AC-3 duty. Built to IEC60947-4-1 and GB14048.4 standards, it is used in combination with thermal relays to form magnetic motor starters. The contactor is suitable for installation on a 35mm DIN rail or with two screws, and features a 3P+NO or 3P+NC contact configuration depending on the model.
Key Benefits
- Enables remote and frequent control of AC motors without manual intervention
- Integrates with thermal relays to form a complete magnetic motor starter
- Supports AC-3 duty for reliable motor starting and stopping under load
- Built to IEC60947-4-1 and GB14048.4 standards for consistent performance
- Available in multiple current ratings from 9A to 330A to match various motor sizes
- Mounts on 35mm DIN rail or with two screws for flexible panel integration
Who It Is For
- Panel builders integrating motor control into electrical distribution boards
- Machine manufacturers specifying contactors for motor control in equipment
- Industrial automation suppliers sourcing reliable contactors for control systems
- EPC contractors installing motor control circuits in commercial or industrial sites
- OEM/ODM buyers requiring contactors for branded motor starter assemblies
Problems It Solves
- A motor must be manually started or stopped, increasing labor and risk
- Frequent mechanical switching wears out manual switches faster than contactors
- No reliable way to remotely control a motor from a central panel or control room
- Lack of standardised contactor models makes panel design inconsistent
- Motor control circuits require separate components, increasing wiring and space
Application Scenarios
- Industrial machinery requiring repeated motor start-stop cycles in automated production lines
- HVAC systems where motors for fans and compressors are controlled remotely
- Pump stations with frequent on-off cycles for water or wastewater management
- Manufacturing equipment where motor control must be integrated into a central control panel
- Distribution boards where motor starters are built using contactors and thermal relays
Technical Features
How It Is Built
- Rated insulation voltage up to 1000V AC
- Rated operation current from 9A to 330A under AC-3 duty
- Operating frequency 50/60Hz
- Control power up to 7.5kW at 380V, 5.5kW at 660V
- 3P+NO or 3P+NC contact configuration depending on model
- Mounting options: 35mm DIN rail or two-screw installation
- Coil terminal marked A1 facing up for consistent orientation
- Arc-resistant contacts that do not require filing after burning
Materials and Construction
- Flame-retardant plastic housing with high mechanical strength
- Silver-alloy contacts for low contact resistance and arc resistance
- Electromagnetic coil with insulated winding for reliable operation
- Movable armature and iron core made of laminated steel for efficient magnetic operation
Quality Control
- Coil voltage and frequency verified against order specifications
- Contact resistance measured to ensure low loss under load
- Visual and functional check for foreign objects in moving parts
Specifications
Stated Ratings for This Model
| Standards Compliant | IEC60947-4-1, GB14048.4 |
|---|---|
| Rated Insulation Voltage | 1000V |
| Operating Frequency | 50/60Hz |
| Rated Operation Current | 9A to 330A under AC-3 duty |
| Control Power | Up to 7.5kW at 380V, 5.5kW at 660V |
| Number of Contacts | 3P+NO or 3P+NC |
| Coil Terminal Orientation | A1 terminal facing up |
| Contact Material | Arc-resistant, no filing required after burning |
Ratings are as published for this model. Where a value is not published we mark it TBC rather than estimating it.
Values that could not be confirmed against the published catalogue text for this model are marked TBC and confirmed by email before order: Installation Method, Mechanical Life.
Manufacturing Process
- Moulding of the contactor housing and terminal blocks
- Assembly of the contact system and arc chutes
- Installation and testing of the electromagnetic coil
- Adjustment of the contact gap and operating clearance
- Final inspection and dielectric testing before packaging
Customization Options
- Coil rated voltage and frequency selected from standard values
- Contact configuration supplied as 3P+NO or 3P+NC based on order
- ODM branding available on housing and packaging
- Packaging and carton marking to buyer’s specifications
Comparison
How It Compares
| Manual motor starter | Automates start-stop cycles and reduces operator risk, though higher initial cost |
|---|---|
| Solid-state relay | Handles higher current and mechanical durability, but consumes more power and lacks overload protection |
| Contactors with separate thermal relay | Integrated thermal relay option available, but separate units allow more flexible configuration |
| Contactors with built-in overload protection | Simplifies panel wiring, but less flexible if protection settings need to be adjusted separately |
Use Guide
- Verify coil rated voltage and frequency match the control circuit before installation
- Install the contactor with the A1 terminal facing up, aligned with human visual habits
- Tighten all wiring screws and confirm correct wiring before energising
- Power the coil without main contact load and test several cycles for reliable operation
- Inspect for foreign objects like screws or washers that could block moving parts
- Clean iron core surface if abnormal noise is detected during operation
- Inspect moving parts and fasteners regularly; replace damaged components promptly
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FAQ
Questions About the LC1(CJX2) Series Contactor
What are the available rated operation currents for the LC1 series
The series covers 9A, 12A, 18A, 25A, and up to 330A depending on the model.
Which standards does the contactor comply with
It is built to IEC60947-4-1 and GB14048.4 for industrial control applications.
Can the contactor be used with a thermal relay
Yes. It is designed to be used in combination with a thermal relay to form a magnetic motor starter.
How should the contactor be installed
It can be mounted on a 35mm DIN rail or secured with two screws, with the A1 terminal facing up.
Are the contacts replaceable if damaged
The contacts are not user-replaceable; damaged units should be replaced as a whole.
Can we have it supplied under our own brand
Yes. We support ODM projects and can print your branding on the housing and packaging. Provide your artwork and required current ratings.
Get a Quotation for the LC1(CJX2) Series Contactor
Tell us the ratings, pole counts and quantities you need and we will price this model directly.