Heavy Duty High Current DC Contactor | EV & Energy Storage Main Battery Relay
Heavy Duty High Current DC Contactor | EV & Energy Storage Main Battery Relay
This heavy-duty sealed DC contactor supports ultra-high rated voltage up to 1500VDC, specially developed for high-voltage lithium energy storage, photovoltaic power station and new energy vehicle high-voltage battery systems. Equipped with oversized thick copper bolt terminals and built-in professional magnetic DC arc extinguishing structure, it stably switches large DC current under 1500V high voltage without contact ablation. Adopted fully sealed flame-retardant insulated housing with multi-point fixed mounting lugs, it is the core main circuit power control switch for 1500V-class industrial energy storage, off-grid solar power and commercial electric vehicle high-voltage platforms.
This heavy-duty sealed DC contactor supports ultra-high rated voltage up to 1500VDC, specially developed for high-voltage lithium energy storage, photovoltaic power station and new energy vehicle high-voltage battery systems. Equipped with oversized thick copper bolt terminals and built-in professional magnetic DC arc extinguishing structure, it stably switches large DC current under 1500V high voltage without contact ablation. Adopted fully sealed flame-retardant insulated housing with multi-point fixed mounting lugs, it is the core main circuit power control switch for 1500V-class industrial energy storage, off-grid solar power and commercial electric vehicle high-voltage platforms.
1. Product Overview
The high voltage DC contactor is a professional high-voltage magnetic switching component customized for 1500V DC high-voltage power systems, widely matched with large-scale photovoltaic energy storage power stations, commercial high-voltage energy storage cabinets, industrial high-capacity lithium battery packs.
Breaking the voltage limit of conventional low-voltage DC contactors, this model achieves stable safe switching under 1500V ultra-high DC voltage. It integrates thickened copper bolt conductive terminals, enhanced magnetic arc extinguishing module and fully sealed anti-corrosion flame-retardant housing, solving the technical difficulty of high-voltage DC arc quenching.
2. Core Product Features
1. Industry-Leading 1500VDC Ultra-High Voltage Rated
The core highlight of this contactor: maximum sustainable operating voltage reaches 1500 Volts DC, fully compatible with mainstream 1500V energy storage and PV high-voltage platforms.
- Meet high-voltage energy storage system 1500VDC design standards
- Avoid voltage breakdown and insulation failure risks of low-voltage contactors under 1500V working conditions
- Pass strict high-voltage withstand voltage insulation test, long-term stable operation under 1500V DC continuous voltage
2. Oversized Thick Copper Bolt Terminals
- Large-diameter solid copper conductive terminals, ultra-low contact resistance, minimal temperature rise under continuous heavy DC load
- Bolt locking structure fits thick copper cable lugs, avoids loose wiring heating under long-term vehicle vibration
- Anti-oxidation copper surface treatment, long service life in humid battery box environments
3. Fully Sealed Flame-Retardant Insulated Housing
Integral molded high-temperature resistant black engineering plastic shell:
- Excellent flame retardant and insulation performance, block arc overflow during DC breaking
- Fully sealed internal structure to prevent dust, moisture and battery electrolyte vapor corrosion
- Anti-impact shell structure, adapt to bump and vibration of vehicle driving
4. Built-in Professional DC Arc Extinguishing System
Unique internal magnetic quenching module:
- Fast pull apart DC electric arc when cutting off heavy load current, avoid contact melting and welding
- Stable breaking performance even under instantaneous short surge current, extend contact service life
5. Multi-Point Fixed Mounting Lugs
Three reserved mounting hole lugs at the base:
- Multi-screw fixing design, firm installation without shifting during equipment operation
- Compatible with standard battery box and equipment metal panel mounting holes, easy assembly
6. Wide DC Application Compatibility
Universal heavy DC load control for multiple new energy industries:
- New energy electric vehicle main battery power switch
- Low-speed sightseeing cars, golf cart lithium pack master contactor
- RV, yacht off-grid energy storage battery control relay
- Portable large-capacity energy storage power station main circuit
- Solar off-grid photovoltaic storage power distribution equipment
7. Long Mechanical & Electrical Service Life
Precision silver alloy internal moving and static contacts, thousands of stable on-off cycles without failure, support frequent startup and shutdown of high-power DC loads.
3. Working Conditions
This 1500VDC high voltage DC contactor maintains stable high-voltage switching performance under standard industrial indoor environments:
- Rated Main Circuit Voltage: Up to 1500VDC
- Coil Control Voltage: DC 12V / 24V / 48V customizable
- Ambient operating temperature: -20℃ ~ +70℃
- Protection Grade: IP54 sealed housing, suitable for energy storage cabinet sealed internal environment; avoid long-term water immersion
- Surrounding atmosphere: Free of strong corrosive chemical gas; can resist weak electrolyte mist in battery cabinets
- Altitude: Stable high-voltage insulation performance below 2000 meters above sea level
- Vibration resistance: Tolerate regular mechanical vibration of energy storage equipment and vehicle driving
4. Unified Technical Specifications
| Parameter | Unified Specification for Heavy DC Contactor |
|---|---|
| Product Type | High Current Sealed DC Magnetic Contactor |
| Main Circuit Terminal | Two thick copper bolt terminals for DC positive/negative main circuit |
| Rated Working Voltage | 1500VDC |
| Applicable DC Current Range | Optional 20A / 100A / 150A / 200A / 300A / 400A / 500A |
| Coil Control Voltage | DC 12V / 24V customizable |
| Housing Material | High flame-retardant sealed black engineering plastic |
| Mounting Method | 3 fixed lug holes, screw fixed installation |
| Core Technology | Magnetic arc extinguishing for DC arc breaking |
| Core Functions | DC battery main circuit on/off control, load power cut-off protection |
| Typical Load | EV lithium battery, energy storage power station DC system |
5. Typical Applications
- New energy electric vehicle power battery main control contactor
- Low-speed electric vehicle, sightseeing cart, golf cart battery master switch
- RV, marine yacht off-grid lithium energy storage battery pack relay
- Large portable outdoor energy storage power station main circuit cut-off
- Solar off-grid household energy storage power distribution cabinet control
- Construction machinery, electric forklift lithium battery power switch
6. Frequently Asked Questions (FAQ)
1. Why use thick copper bolt terminals instead of small wiring terminals?
This product is used for high-current DC battery circuits. Small thin terminals will generate serious heat and oxidize under large continuous current. Thick copper bolt terminals reduce contact resistance and eliminate overheating hidden danger.
2. Can this DC contactor break heavy DC load current?
Yes, it is equipped with internal magnetic arc extinguishing structure specially for DC arcs, which can quickly extinguish the high-temperature electric arc generated when cutting DC heavy load to prevent contact welding failure.
3. Can it be installed in a car battery compartment?
The fully sealed dust-proof and moisture-proof housing is specially optimized for vehicle battery box environments, resisting electrolyte mist and driving vibration, which is the standard matching component for EV manufacturers.
4. Is the coil control voltage customizable?
We support customized coil voltage of DC12V, DC24V and DC48V to match different vehicle and energy storage system control power supply.
5. What is the function of the bottom mounting lugs?
Three independent fixed lugs with mounting holes can lock the contactor firmly on the metal plate of the battery box, preventing displacement and loose wiring caused by vehicle bump vibration.
6. What is the difference between DC contactor and ordinary AC contactor?
Ordinary AC contactors cannot extinguish DC electric arcs and are easy to burn out contacts when breaking DC loads. This product adopts dedicated DC arc extinguishing design, which is only suitable for DC battery power systems.
7. Technical Documentation & Support
Download full datasheets including complete specs, wiring schematics and selection guides.
Reach out to our technical team for project-specific customization and OEM/ODM service.
Submit a project inquiry to receive bulk pricing, production lead times and relevant compliance certificates.
1. Product Overview
The high voltage DC contactor is a professional high-voltage magnetic switching component customized for 1500V DC high-voltage power systems, widely matched with large-scale photovoltaic energy storage power stations, commercial high-voltage energy storage cabinets, industrial high-capacity lithium battery packs.
Breaking the voltage limit of conventional low-voltage DC contactors, this model achieves stable safe switching under 1500V ultra-high DC voltage. It integrates thickened copper bolt conductive terminals, enhanced magnetic arc extinguishing module and fully sealed anti-corrosion flame-retardant housing, solving the technical difficulty of high-voltage DC arc quenching.
2. Core Product Features
1. Industry-Leading 1500VDC Ultra-High Voltage Rated
The core highlight of this contactor: maximum sustainable operating voltage reaches 1500 Volts DC, fully compatible with mainstream 1500V energy storage and PV high-voltage platforms.
- Meet high-voltage energy storage system 1500VDC design standards
- Avoid voltage breakdown and insulation failure risks of low-voltage contactors under 1500V working conditions
- Pass strict high-voltage withstand voltage insulation test, long-term stable operation under 1500V DC continuous voltage
2. Oversized Thick Copper Bolt Terminals
- Large-diameter solid copper conductive terminals, ultra-low contact resistance, minimal temperature rise under continuous heavy DC load
- Bolt locking structure fits thick copper cable lugs, avoids loose wiring heating under long-term vehicle vibration
- Anti-oxidation copper surface treatment, long service life in humid battery box environments
3. Fully Sealed Flame-Retardant Insulated Housing
Integral molded high-temperature resistant black engineering plastic shell:
- Excellent flame retardant and insulation performance, block arc overflow during DC breaking
- Fully sealed internal structure to prevent dust, moisture and battery electrolyte vapor corrosion
- Anti-impact shell structure, adapt to bump and vibration of vehicle driving
4. Built-in Professional DC Arc Extinguishing System
Unique internal magnetic quenching module:
- Fast pull apart DC electric arc when cutting off heavy load current, avoid contact melting and welding
- Stable breaking performance even under instantaneous short surge current, extend contact service life
5. Multi-Point Fixed Mounting Lugs
Three reserved mounting hole lugs at the base:
- Multi-screw fixing design, firm installation without shifting during equipment operation
- Compatible with standard battery box and equipment metal panel mounting holes, easy assembly
6. Wide DC Application Compatibility
Universal heavy DC load control for multiple new energy industries:
- New energy electric vehicle main battery power switch
- Low-speed sightseeing cars, golf cart lithium pack master contactor
- RV, yacht off-grid energy storage battery control relay
- Portable large-capacity energy storage power station main circuit
- Solar off-grid photovoltaic storage power distribution equipment
7. Long Mechanical & Electrical Service Life
Precision silver alloy internal moving and static contacts, thousands of stable on-off cycles without failure, support frequent startup and shutdown of high-power DC loads.
3. Working Conditions
This 1500VDC high voltage DC contactor maintains stable high-voltage switching performance under standard industrial indoor environments:
- Rated Main Circuit Voltage: Up to 1500VDC
- Coil Control Voltage: DC 12V / 24V / 48V customizable
- Ambient operating temperature: -20℃ ~ +70℃
- Protection Grade: IP54 sealed housing, suitable for energy storage cabinet sealed internal environment; avoid long-term water immersion
- Surrounding atmosphere: Free of strong corrosive chemical gas; can resist weak electrolyte mist in battery cabinets
- Altitude: Stable high-voltage insulation performance below 2000 meters above sea level
- Vibration resistance: Tolerate regular mechanical vibration of energy storage equipment and vehicle driving
4. Unified Technical Specifications
| Parameter | Unified Specification for Heavy DC Contactor |
|---|---|
| Product Type | High Current Sealed DC Magnetic Contactor |
| Main Circuit Terminal | Two thick copper bolt terminals for DC positive/negative main circuit |
| Rated Working Voltage | 1500VDC |
| Applicable DC Current Range | Optional 20A / 100A / 150A / 200A / 300A / 400A / 500A |
| Coil Control Voltage | DC 12V / 24V customizable |
| Housing Material | High flame-retardant sealed black engineering plastic |
| Mounting Method | 3 fixed lug holes, screw fixed installation |
| Core Technology | Magnetic arc extinguishing for DC arc breaking |
| Core Functions | DC battery main circuit on/off control, load power cut-off protection |
| Typical Load | EV lithium battery, energy storage power station DC system |
5. Typical Applications
- New energy electric vehicle power battery main control contactor
- Low-speed electric vehicle, sightseeing cart, golf cart battery master switch
- RV, marine yacht off-grid lithium energy storage battery pack relay
- Large portable outdoor energy storage power station main circuit cut-off
- Solar off-grid household energy storage power distribution cabinet control
- Construction machinery, electric forklift lithium battery power switch
6. Frequently Asked Questions (FAQ)
1. Why use thick copper bolt terminals instead of small wiring terminals?
This product is used for high-current DC battery circuits. Small thin terminals will generate serious heat and oxidize under large continuous current. Thick copper bolt terminals reduce contact resistance and eliminate overheating hidden danger.
2. Can this DC contactor break heavy DC load current?
Yes, it is equipped with internal magnetic arc extinguishing structure specially for DC arcs, which can quickly extinguish the high-temperature electric arc generated when cutting DC heavy load to prevent contact welding failure.
3. Can it be installed in a car battery compartment?
The fully sealed dust-proof and moisture-proof housing is specially optimized for vehicle battery box environments, resisting electrolyte mist and driving vibration, which is the standard matching component for EV manufacturers.
4. Is the coil control voltage customizable?
We support customized coil voltage of DC12V, DC24V and DC48V to match different vehicle and energy storage system control power supply.
5. What is the function of the bottom mounting lugs?
Three independent fixed lugs with mounting holes can lock the contactor firmly on the metal plate of the battery box, preventing displacement and loose wiring caused by vehicle bump vibration.
6. What is the difference between DC contactor and ordinary AC contactor?
Ordinary AC contactors cannot extinguish DC electric arcs and are easy to burn out contacts when breaking DC loads. This product adopts dedicated DC arc extinguishing design, which is only suitable for DC battery power systems.
7. Technical Documentation & Support
Download full datasheets including complete specs, wiring schematics and selection guides.
Reach out to our technical team for project-specific customization and OEM/ODM service.
Submit a project inquiry to receive bulk pricing, production lead times and relevant compliance certificates.
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