1. The product conforms to OC / t695-2002 relay standard 2. There are no missing parts and fasteners are not loose; 3. Voltage: 12 ± 0.48v 4. Circuit characteristics: single pole single throw 5. Coil parameters: wire diameter: φ0 . 4, number of turns: 1200, temperature resistance: 180 ℃ 6. 12V: the starting voltage Less than 8V, the releasing voltage Less than 2.5V 7. Coil winding resistance value test: 12V resistance value = 10 . 5Q ± 5 % ( 20 ℃ ) 8. White zinc plating on shell, 8 μ thick, 48 hours salt 9. Insulation resistance: the sine wave voltage is 550V and the test lasts for 1min. The insulation not be broken down 10. Use temperature range (- 30 - + 85) degrees 11. Relative humidity less than 90% 12. Contact load current 300A, duration 3S; contact voltage drop less than equal 0.2V (20A) 13. Maximum instantaneous current 600A (within 3 seconds) 14. Winding skeleton 30% reinforced flame retardant nylon 15. The durability of relay is tested more than 80000 times when it is powered