Smart electricity meters give building managers insight into and control over energy use. Littelfuse makes the solid state relays,
Link has been copied to clipboardHigh Voltage DC Contactor Relays
Electric vehicles and industrial electronic control systems demand reliable, high-performance power management solutions. Littelfuse High-Voltage DC Contactor Relays are engineered to meet those demands with robust switching capability, long electrical life, and circuit protection across a wide range of applications, including Hybrid Electric Vehicles (HEVs), Battery Electric Vehicles (BEVs), eMobility, electric maintenance and transport vehicles, material handling equipment, industrial machinery, and energy storage systems.
Our portfolio includes models with continuous current ratings from 30A to 800A and maximum voltage ratings up to 1800V DC, supporting both low- and high-power system requirements. A full range of configurations are available to meet specific design needs, including options with non-polarized or polarized contacts, auxiliary contacts, and coil-economizer technologies such as pulse-width modulation (PWM) and double-coil economizer designs to reduce power consumption and heat generation.
Also designed for use in industrial applications, such as EV charging infrastructure, battery packs, uninterruptible power supplies, DC fast-charging, motor control, circuit insulation, circuit protection, and safety-critical systems, our High-Voltage DC Contactors deliver safe, reliable performance in demanding environments.
Browse our off-the-shelf High-Voltage DC Contactors or partner with us to develop a custom solution for your next design.
Our portfolio includes models with continuous current ratings from 30A to 800A and maximum voltage ratings up to 1800V DC, supporting both low- and high-power system requirements. A full range of configurations are available to meet specific design needs, including options with non-polarized or polarized contacts, auxiliary contacts, and coil-economizer technologies such as pulse-width modulation (PWM) and double-coil economizer designs to reduce power consumption and heat generation.
Also designed for use in industrial applications, such as EV charging infrastructure, battery packs, uninterruptible power supplies, DC fast-charging, motor control, circuit insulation, circuit protection, and safety-critical systems, our High-Voltage DC Contactors deliver safe, reliable performance in demanding environments.
Browse our off-the-shelf High-Voltage DC Contactors or partner with us to develop a custom solution for your next design.
- Optional auxiliary switches are available for HVAC-R equipment, vehicle systems, industrial controls, and lighting applications.
- High-Voltage DC Contactors for reliable switching in vehicle, industrial, and lighting power circuits.
- Multiple coil voltages are available to support diverse control architectures.
- Options for polarized and non-polarized contacts to support various system requirements.
- High electrical and mechanical life designed for demanding duty cycles.
High Voltage DC Contactor Relays Parts
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Electricity Meters
2/3-Wheeler Energy Storage
Littelfuse provides advanced circuit protection and sensing solutions for Li-ion battery systems in two-and three-wheeler electric vehicles. This
Battery Disconnect & Power Distribution - Truck & Bus
Li-ion battery disconnect switches ensure EVs and electric buses remain charged while parked. Power distribution units that incorporate
HVAC
Leading OEMs rely on Littelfuse for critical electronic components of HVAC equipment. We engineer the broadest portfolio of devices to protect
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Frequently Asked Questions
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What are high-voltage dc contactor relays?
High-voltage dc contactor relays are electromechanically operated switches designed for direct connection to high-load devices such as electric motors. Unlike standard dc relays, these heavy-duty contactors often have features like magnetic blowouts and sealed gas chambers to suppress electrical arc, and they are sometimes designed with features like coil economizers
How do high-voltage dc contactor relays work?
In a typical high-voltage dc contactor, when a control voltage is applied to the coil contacts, it generates a magnetic field that attracts a movable iron core toward a fixed core. Movable contacts attached to the moveable core are pulled toward fixed contacts. When the contacts meet, it completes the circuit and allows power to flow to the load. When the control