ATM you can buy DC 1000V Electric for 13.79 USD (in Banggood). You can create price alert here, copy coupons and view price history. You probably want to know what is the best price?
Latest coupon code price check (UTC time):
Banggood (13.79 USD)
Banggood warehouse is located in China. There are no coupons for this product in Banggood. I think you want to know if the price is good. Hmmm, price is higher than average (which is 9.49 USD right now), so better set price alert down below…
Link: Banggood product page
Price: 13.79 USD
Old coupons (from the oldest to the newest): BG589b2e
(I don’t think these’re gonna work, but you can try ’em out anyway)
Aliexpress
Click here… to search for CHSZDEXI 2P20KA DC 1000V Electric Surge Protector Circuit Breaker on Aliexpress
Here are coupons that you can use.
Price history and price alert
Price history (for all/most countries) for CHSZDEXI 2P20KA DC 1000V Electric Surge Protector Circuit Breaker is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).