Ceramic resistor, production method thereof, neutral grounding resistor and circuit breaker

A ceramic resistor, comprising:

• 4 kinds of compounds 97.0-99.97 wt % in total, composed of zinc oxide as a main component, aluminum oxide, magnesium oxide and silicon oxide, said 4 kinds of compounds being aluminum oxide 3.0-40 mol %, magnesium oxide 2.0-40 mol %, silicon oxide 0.1-10 mol % and zinc oxide the remaining, and
• an additive 0.03-3 wt %, said additive being borosilicate glass containing at least one kind of compound selected from a group consisting of calcium oxide, strontium oxide and barium oxide, said additive being said at least one kind of compound 1.0-40 wt % selected from said group and the borosilicate glass the remaining, said at least one kind of compound selected from said group being 0.003-0.3 wt % to the total contents of said ceramic resistor, and
• having a positive temperature coefficient of resistance.