Shanghai SCII Electronics Co., Ltd.

Pre-charge relays are used in the high-voltage system of new energy vehicles to pre-charge the load capacitance with a small current before the main contactor closes, limiting inrush current and protecting the high-voltage contactor and battery pack. The SCII series covers the EV10/EV20 and MK models with a compact sealed structure and 12V/24V coil control, making it a key safety component of the high-voltage power-up circuit.

Rated coil voltage: 12V/24V DC; Rated contact current: 20A; Rated contact voltage: 450V DC; Contact resistance: ≤50mΩ; Operating time: ≤15ms; Dielectric withstand: 1500V AC

• Pre-charge circuit of NEV battery packs
• DC charging stations
• Energy storage systems

Ceramic-sealed high-power DC contactors use a ceramic chamber filled with protective gas and hermetically sealed, offering strong breaking capacity and arc resistance; they are dedicated to switching high currents in the main circuits of new energy vehicles and energy storage systems. The EVE/EVT series covers current ratings from 150A to 500A, supports 12V/24V coils, and meets high reliability and long service life requirements.

Rated operating voltage: 900V DC; Rated current: 200A; Contact resistance: ≤0.5mΩ; Coil control voltage: 12V/24V DC; Dielectric withstand: 4000V AC; Mechanical life: 1×10^5 operations

• Main circuits of new energy vehicles
• DC charging stations
• Energy storage and PV inverters

Epoxy-sealed high-power DC contactors are integrally potted with epoxy resin, featuring a compact structure, good protection and cost efficiency; they suit new energy vehicle and industrial DC applications with strict requirements on volume and protection. Covering the ES/EV/LEV/SEV/JQX series with currents from 50A to 600A, they are widely used in high-voltage power distribution and DC power supplies.

Rated operating voltage: 900V DC; Rated current: 250A; Contact resistance: ≤0.5mΩ; Coil control voltage: 12V/24V DC; Dielectric withstand: 3500V AC; Mechanical life: 1×10^5 operations

• High-voltage power distribution of NEVs
• Industrial DC power supplies
• Energy storage systems

Automotive EMI filters suppress electromagnetic interference in the electronic control units, on-board chargers and motor drive systems of new energy vehicles, ensuring electromagnetic compatibility of the high-voltage system. The QC-1-11 series is subdivided by current (11A–250A) and construction (JM/JL/SQ/HW) to fit different vehicle layouts and installation spaces.

Rated voltage: 750V DC; Rated current: 250A; Filter frequency band: 150kHz-30MHz; Insertion loss: ≥40dB; Dielectric withstand: 2500V AC; Insulation resistance: ≥100MΩ

• NEV electronic control systems
• On-board chargers (OBC)
• Motor drive systems

The 48V start-stop relay is designed for mild hybrid (48V MHEV) systems, reliably switching the starter motor and electrical loads during start-stop and energy regeneration operations. With high durability and vibration resistance, it helps reduce fuel consumption and emissions.

Rated coil voltage: 12V DC; Rated contact current: 100A; Rated contact voltage: 48V DC; Contact resistance: ≤5mΩ; Mechanical life: 1×10^5 operations

• 48V mild hybrid systems
• Automotive start-stop control
• Automotive electronic loads

The photocell (light-controlled switch) automatically turns street and outdoor lighting circuits on or off according to ambient light levels, and is widely used in road lighting, landscape illumination and solar street lights. SCII offers electronic versions, overmolded protected versions and matching bases for different outdoor environments.

Operating voltage: 220V AC; Load current: 10A; Light threshold: 5-50lux; Protection degree: IP65; Operating delay: 10s

• Road lighting
• Landscape illumination projects
• Solar street lights

The general-purpose EMI filter series suppresses conducted interference in industrial equipment, variable frequency drives and switching power supplies. It is subdivided by current rating and package (A series, AYE series, KV series, etc.) to meet the EMC needs of equipment with different power levels.

Rated voltage: 250V AC; Rated current: 30A; Leakage current: ≤0.5mA; Insertion loss: ≥40dB; Operating temperature: -25~+85℃; Withstand voltage: 2000V AC

• Industrial automation equipment
• VFDs and servo systems
• Switching power supplies

The MSD manual service disconnect is a safety maintenance device for the high-voltage circuits of new energy vehicles and energy storage systems. During servicing it manually breaks the HV circuit and allows the fuse element to be withdrawn, protecting personnel and equipment, with a high protection degree and high breaking capacity.

Rated voltage: 1000V DC; Rated current: 350A; Protection degree: IP67; Breaking capacity: 350A; Insulation resistance: ≥500MΩ

• NEV battery packs
• Energy storage systems
• High-voltage distribution maintenance

The BDU (Battery Distribution Unit)/PDU (Power Distribution Unit) integrates contactors, fuses, pre-charge circuits and current sensing to distribute and manage the high-voltage energy of the battery pack safely; it is the core power distribution component of new energy vehicles and energy storage systems.

Rated voltage: 1000V DC; Rated current: 250A; Protection degree: IP67; Operating temperature: -40~+85℃; Insulation resistance: ≥500MΩ

• High-voltage power distribution of NEVs
• Battery pack energy management
• Charging and energy storage systems

The shunt (current sampling resistor) converts current into a millivolt-level voltage signal proportionally in high-current circuits, working with the BMS or instrument cluster for current detection and metering. It supports CAN communication and 12V/24V supply, and is a key sensing component of battery management systems.

Rated current: 500A; Output voltage: 50mV/75mV; Accuracy class: 0.5; Operating temperature: -40~+85℃; Overload capacity: 120%

• Current detection in battery management systems
• DC charging station metering
• Industrial high-current measurement

The charging module is the core power unit of a DC charging station, rectifying the AC input into controlled DC output to charge the high-voltage battery of new energy vehicles. With high power density and efficiency, it supports a wide output voltage range to serve different vehicle models.

Rated power: 180kW; Input voltage: 380V AC; Output voltage: 200-1000V DC; Efficiency: ≥95%; Protection degree: IP54

• DC charging stations
• Energy storage PCS
• High-power charging systems

The transformer, reactor and inductor series covers power-frequency transformers, PFC inductors, nanocrystalline inductors and various reactors, serving power supplies, home appliances, industrial control and new energy conversion. It is the company's traditional magnetic component product line.

Rated power: 50VA; Input voltage: 220V AC; Output voltage: 12V AC; Insulation class: Class B; Operating frequency: 50/60Hz

• Switching power supplies and adapters
• Industrial control
• Home appliances and new energy conversion