Zhejiang THOR Electric Co., Ltd
Professional Manufacturer for surge protection device.
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Zinc oxide varistor
Color: Blue
Verification: CE
Product description
The varistor is a voltage limiting type protection device. Using the nonlinear characteristics of the varistor, when an overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby realizing the protection of the varistor of the latter circuit. Parameters are: varistor voltage, current capacity, junction capacitance, response time, etc.
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Product specifications
| Model | 05D221K | |
| Maximum continuous operating voltage | AC 140V | DC 180V |
| Varistor voltage | 220V | |
| Maximum limit voltage | VP 380V | IP 5A |
| Flow through capacity | 1 time 400A | 2 time 200A |
| Rated power | 0.1W | |
| Capacitance | 110pF | |
Use attention
1. It must be ensured that when the voltage fluctuation is maximum, the continuous working voltage will not exceed the maximum allowable value, otherwise the service life of the varistor will be shortened;
2. When a varistor is used between the power supply line and the ground, the voltage between the line and the ground may rise due to poor grounding. Therefore, a varistor with a higher nominal voltage than the line-to-line use is usually used.
3. The surge current absorbed by the varistor should be less than the maximum flux of the product.
4. Use a higher nominal voltage varistor than between line and line.
working principle
When the voltage applied to the varistor is below its threshold, the current flowing through it is extremely small, which is equivalent to a resistor with an infinite value. That is, when the voltage applied to it is below its threshold, it is equivalent to an open state switch [1]. When the voltage applied to the varistor exceeds its threshold, the current flowing through it surges, which is equivalent to an infinitely small resistance. That is, when the voltage applied to it is above its threshold, it is equivalent to a closed state switch.
Company profile
Zhejiang Thor Electric Co., Ltd is committed to meeting the requirements of the European Union's Waste Electrical and Electronic Equipment (WEEE) directive. This prompt varies producers of electrical and electronic equipment to finance the take-back for re-use or recycling of their Products placed on the EU market after 2005.It is our goal and mission to connect our customer challenges with high-quality, right-priced solutions and products – completed by unrivaled customer service and technical support.
FQA
Q: What advantages do you have?
A: We have been manufacturing and exporting SPD for more than 10 years !
We have CE and TUV certification
Q: Can I get some samples?
A: We support small quantity samples order ! please contact with our staff and leave your detail contact information , we will answer you within 24 hours
Q: How long does it take to deliver?
A: Fast delivery : 3~7days after payment
Q: Could you do OEM for us?
A: We have good experience on OEM service
Q: How long is your products warranty ?
A: 3 years warranty
Q: How to pay?
A: We accept T/T, Paypal, Western union, L/C, Trade Assurance