High Current Auto Relays

Automotive applications for relays continue to increase even though semiconductor alternatives are available for the same functions. Electromechanical relays provide an automotive-proven track record and meet the specifications and cost targets. With increased high-current handling capability, relays can continue to be the right solution for many automotive switching applications. Relays that handle up to 80A in a small form factor can address several loads in 12V vehicles. With higher voltages in hybrid electric vehicles, higher voltage and current ratings are required. Two 12V and one high voltage relay demonstrate the higher current capability that is available.

High Voltage 200A Relay

Omron Electronic Components LLC G9E series of dc power relays provide a battery disconnect for hybrid electric vehicles (HEVs) in emergency situations. Using a sealed, gas-filled construction to cool the arc created during switching, the contact gap is reduced, allowing for a 70 percent reduction in overall size compared to contactors. The 44 × 98 × 86.7 mm G9EC switches up to 200A at 400V dc with other current and voltage ratings available, all in a SPST-NO contact configuration. Operating coil voltages include 12, 24, 48, 60 and 100V dc. The power relays have a dielectric strength of 2,500V ac with an impulse withstand of 4,500V when operating in a moisture-free temperature range of —40 to 70C. Other applications for the relays include fuel cells, battery-operated golf carts and forklifts, wind and solar power generation and industrial equipment.

http://rbi.ims.ca/5406-555

80A Relay

CIT RELAY & SWITCH AutomotiveA3 Series Relays are rated up to 80A at 14V dc providing a maximum switching power of 1,120W. The 28.5 × 28.5 × 26.5 mm relay weighs 46 gm and has a maximum switching voltage of 75V dc. Available in PCB pin and quick-connect mounting, contact arrangements include normally open (NO) and normally closed SPST, SPDT and SPST NO on two terminals. With an operating temperature of -40 to 85C (storage temperature of -40 to 155C), electrical life is typically 100K cycles with mechanical life of 10M cycles. Contact resistance is less than 30 mO and the dielectric strength of the coil to contact is 500 Vrms minimum at sea level and contact-to-contact dielectric strength is 500 Vrms. The relays target automotive applications including lamp accessories.

http://rbi.ims.ca/5406-553

30 To 80A Relays

Hasco Components Int'l Corp. CAR series relays have a maximum current capacity of 80A, as well as 30, 40 and 60A ratings in a 1A or 1C footprint. With dimensions of 1.06 (27) × 1.06 (27) × .96 inch (24 mm), a variety of dc coil voltages are offered including 5, 6, 9, 12 and 24V. Contact arrangement include SPST (1 Form A), SPST (1 Form B) and SPDT (1 Form C). Relay options include quick-connects, a mounting tab and fully sealed versions. With an operating temperature of —40 to 85C (105C Class F coil option), the mechanical life is 1,000,000 cycles allowing the units to address several automotive applications.

http://rbi.ims.ca/5406-554