Surface Mount Encapsulation SMD Varistor 10D511K 10mm 320VAC 4KV 2KA For Power Supply

Features

■ Flame retardant coating (UL94V0)

■ Excellent transient voltage suppression characteristics

■ Higher surge current

■ Wide varistor voltage

■ V-I characteristics are the same in both polarity

■ Marking: Blue body color

■ Products with lead-free terminations meet EU RoHS requirements

Performances

Physical parameters			Unit : mm
Marking UCHI 10D511K		D (max.)	12.0
		F (±0.5)	7.5
		T (max.)	5.6
		H (max)	15.5
		L (min)	2.3
		d (±0.08)	1.5
		Trademark	UCHI
		P/N	10D511K
		Approvals	VDE,cUL
		Date code	Y: Year M:Month
		Lead wire	CP wire
Coating	Blue insulated epoxy resin	Weight, g	0.8

Process for Determining the Correct Varistor

1. Determine the continuous working voltage that will be normally across the varistor and select a varistor with maximum AC or DC voltage to match this or slightly higher. 10-15% higher max rated voltage than the actual line voltage is common as supply lines often have a voltage variance tolerance. Often, a varistor will already have this ratio figured into their voltage values. When an extremely low leakage current is more important than the lowest protection level possible, a varistor of even higher operating voltage may be considered.

2. Establish the energy absorbed by the varistor during an event. Although this can sometimes be an unknown value, this is determined by using all the absolute max load values of the varistor during an event within environmental and datasheet specifications . It is important to select a varistor with an energy dissipation rating that at minimal is equivalent or ideally exceeds the energy dissipation required by the event the circuit may produce. The MOV can react to its rated maximum energy level only one time, and then is recommended for replacement. Although the component may appear to be working after this event, it may not function properly.

3. Calculate the peak transient current through the varistor, often known as the surge current. The surge current, is the maximum current that can pass through the MOV within a specified duration and waveform. It is important to select a varistor with a surge current rating that is equivalent or ideally exceeds the current rating required by an event the circuit may produce to ensure proper function. Although the component will handle this surge, most manufacturer’s regard the surge current as a one-time occurrence before the part is recommended for replacement.

4. Determine power dissipation requirements. It is important to select a varistor with a power rating that is equivalent or ideally exceeds the power handling required by the event the circuit may produce. It is common to have the power, surge current, and energy rating to be much higher than the event anticipated. These de-rating factors are commonly at least 50x greater than the required many-time stress tolerance. If unsure about the factors of the event, it is more safe to pick a device of higher power, surge current, and energy ratings.

5. Select a model to provide the required Varistor Voltage MAX, sometimes known as clamping voltage (MAX). Clamping voltage must be selected based on the approximate max voltage value you will allow your circuits input or output to see during an event. You will have to make sure your circuit will be able to handle this voltage. In short, this is approximately the highest voltage your circuit down-line should experience. However, the varistor will begin conduction from approximately the min varistor voltage and this may have some smaller clamping effect prior to the actual clamping voltage.

6. Product Photos

Uchi was established in 2006 in Dongguan, China. 

After years of development, Uchi has become a large scale hi-tech enterprise that specialized in development and production of complete series of MOV,PTC, NTC series, PPTC series, Fuse(ALL TYPE),Resistor、integrated circuit 、 Capacitor, surge protector and protective devices of lightning protection products. It ranks front in the industry and has heartquarter in Hong Kong. With its excellent technology and quality products, Uchi has won wide recognition of overseas customers. Saini Impex PVT.LTD is our authorized sole distributor in india .

China's leading enterprise of circuit protection components​

Our strength ：

A large number of product series in our factory have passed the certification of various international standards




Factory Tour​ ：

Advanced equipment, lean production

Uchi boasts with a production base that covers an area of nearly 15000 square meters.
 

We successively imported high-tech fully automated production equipments and high precision testing instruments and have put into production to realize the automation, large scale and standardization.

Uchi has a galaxy of hi-tech talent teams headed up by national class experts to engage in the work of product development, product quality control, sales andservice technical support, etc., and has successively obtained tens of certificates of appearance patents, utility patents and inventions.
 

To guarantee the quality, we successfully passed the certification of ISO9001:2008 quality management system, scientific and efficient managing mode to carry out lean production and form scientific and efficient quality control system. The products are certified with UL, CUL, TUV, VDE, CSA and SGS, RACH 73 environmentally friendly testing certifications.

Exquisite quality at customers' favor

Uchi is an export membership of Alibaba with free import and export rights. It is appraised as Guangdong Famous Star Enterprise and Dongguan Private Enterprise. Our products have doubled and redoubled to provide more kinds and high quality and reliable products and service. Our products mainly consist of: 

Metal Oxide Varistor
DIP Varistor & SMD Varistor
Thermally Protected Varistor

DC-Link Capacitor for New energy vehicles supporting the HEVEV

Automotive Fuse Links for EV Plugin HEV FCEV
PTC Thermistor

NTC Thermistor

PPTC Resettable Fuse

Thermal Fuse

Auto Blade Fuse

Glass Fuses

Metal Film Resistor

Carbon Film Resistor

Cement Resistor

NTC Temperature Sensor

CDS Photoconductive Cell

Our products are widely used in New energy vehicles, home appliance, medical equipment, office equipment, communication equipment, phone battery, electronic calendar, electronic thermometer and temperature controller to cover military telecommunications, IT, automobile and consumer electronic fields.
Cooperation with good faiths to win in the market.
Excellent quality sincere service is the key to the success of Uchi. 

In the future Uchi will still stick to the tenets of "Quality first, customer foremost." "First class quality, first class service and customersatisfaction" to manufacture the high quality, technically advanced and reasonable prices products. We hope to trigger with global partners the revolution in resistor products. We cordially welcome friends from home and abroad to visit us for guidance and cooperation.