Power relay offers robust performance in electric vehicle (EV) chargers
The EVR series relays from Littelfuse are certified for compliance with the important standards governing electric vehicle charging. The relays have PCB terminals for easy assembly on the board.
Manufacturers of electric vehicle (EV) charging systems can use the Littelfuse EVR series of two-pole PCB ac power relays to provide a robust, isolated switching capability.
The EVR relays have a wide contact gap of more than 3 mm, to meet the requirements of over-voltage Category III equipment, and protect against mechanical shock and vibration. Dielectric strength is up to 5 kV.
Producing a low temperature rise at rated current, these relays can handle heavy-duty switching currents of up to 40 A/277 V ac. This enables compliance with the requirements of standards applied to EV charging equipment, such as IEC 62955, IEC 62752 and UL 2231. In particular, the EVR relays are suitable for Mode 2 and Mode 3 EV charging as defined by IEC 61851-1, and ac Level 2 EV charging as defined by SAE J1772.
Certification according to the IEC 61810:1 standard enables compliance with IEC 61851-1 for switching the main current path in EV chargers. The relays are rated for contact load category CC2, and can switch a minimum of 50,000 cycles at 85°C and currents up to 35 A.
The relays’ mirror contact mechanism, designed in accordance with IEC 60947-4-1, enables detection of power contact welding.
PCB terminals offer easy installation on the board, enabling high-speed assembly and replacement of DIN rail-mounted ac contactors and the associated wiring. The Littelfuse EVR relays are pin-compatible with other popular relays used in EV charging systems.