1. Self-recovery over-voltage and under-voltage protection2. When the power supply is unstable, the protection function is automatically activated, and when the voltage exceeds the limit range, it will be automatically cut off to protect the safety of electrical equipment and personnel3. After the power returns to normal, power on again after 1 minute4. When the power supply is normal, a green indicator light will be displayed, and a red indicator light will be displayed when the power supply is over-voltage or under-voltage5. Mainly used for over-voltage, under-voltage or over-current protection of residential sub-boxes or incoming lines of distribution lines that need protection for single-phase electrical equipment6. Rated voltage: AC 230V7. Frequency: 50Hz/60Hz8. Through current: up to 40A9. Power consumption: less than 2W10. Installation: 35mm rail11. Size: about 7.7x3.5x4.5cmSpecification: Package Weight One Package Weight 0.15kgs / 0.33lb One Package Size 10cm * 8cm * 4cm / 3.94inch * 3.15inch * 1.57inch Qty per Carton 194 Carton Weight 30.00kgs / 66.14lb Carton Size 57cm * 46cm * 23cm / 22.44inch * 18.11inch * 9.06inch Loading Container 20GP: 442 cartons * 194 pcs = 85748 pcs 40HQ: 1026 cartons * 194 pcs = 199044 pcs