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Home > Electrical & Electronics > Passive Components > Resistor & Potentiometer > Zinc Metal Oxide Varistor Surge Arrestor Surge Absorber 7mm 780V/1mA Movs SPD VAR485AC Metal Oxide Varistor

Zinc Metal Oxide Varistor Surge Arrestor Surge Absorber 7mm 780V/1mA Movs SPD VAR485AC Metal Oxide Varistor

US$ 0.02 - 0.025 MOQ: 1000 Pieces

Key Specifications

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Place of Origin:

Guangdong, China

Brand Name:

HEL

Model Number:

7D781K

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Shantou Songhua Electric Firm

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Port of Shipment:

HONGKONG;SHENZHEN;GUANGZHOU

Delivery Detail:

Delivery time depends on order quantity.

Product Details
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Place of Origin Guangdong, China

Brand Name HEL

Model Number 7D781K

Type Varistor

Technology Ceramic Composition

Package Type Throught Hole

Resistance 780V

Resistance Tolerance +/-10%

Rated Power 0.25W

Operating Temperature -40+85

Product Description

SPD,VAR485VAC32.8Joule HEL7D781K

Electronic components- Voltage Dependent Resistor VDR varistor

Type MYG Varistors are made of semiconductor ceramic materials composed mainly of zinc oxide. They have non-linear resistance that change as a function of applied voltage. It has small size, high current capacity, and high protection level.

PRODUCT:HEL7D781K

Varistor voltage(V1mA):780V/702-858V

Maximum Allowable voltage:485VAC/640VDC

Maximum Clamping voltage:1290V

Withstanding Surge Current(8/20us):1200A/1 time

Rated Wattage(W):0.25W

Energy(2ms):32.8J Typical Capacitance:54PF

Dmax=9.00mm; Hmax.=12mm; Lmin=15mm; d0.6+/-0.03mm; A=5mm+/-1mm; Tmax=5.5mm;

Ordering Notes:

1. Ceramic Disc: Zinc Oxide Varistor

2. Material of coating: Epoxy resin

3. Material of Leads: CP wire

4. Lead type: Straight lead

5. Package: Bulk pack

Function:

Technical Data:

1. Varistors Voltage: The voltage between two terminals with the specified measuring current 1mA DC applied is called V1mA,The measurement shall be made as fast as possible to avoid heat affection.

2.Maximum Continuous AC or DC Voltage:Maximum Continuous AC Voltage 0.62multility varistor voltage.

3. Leakage Current: The current passing through the varistors at the maximum continuous DC voltage.

4.Clamping Voltage:The peak voltage at class current (Standard surge currentwaveform is 8/20μS). The class current is a peak value of current which is1/10 of the maximum peak current for 100 impulses at per minute for 8/20μS.

5.Energy:The maximum energy within the varistors voltage change of ±10% when one impulse of 2ms or 10/1000μS is applied.

For the 2mS waveform:J=2*Ip* Vc*10-3 For the 10/1000μS waveform:

J=1391*Ip* Vc*10-6 Where J -- Energy absorbed in joules.

Ip -- Maximum let-through current in amps.Vc-- Measured clamping voltage in volts.

6.MaximumPeak current : The maximum current within the varistors voltage change of ±10% with the standard impulse current (8/20μS) applied one time.

7. Capacitance: Typical value measured at 1Vrms and test frequency of 1kHz.

8.Solderability: After dipping the terminals to a depth of 3.5-0.5 mm from the body in a soldering bath of temperature 235℃±5℃for 2± 0.5seconds, the terminal shall be visually examined.

9.Resistance to Soldering heat: After each lead shall be dipped into a solder bath having a temperature 260℃±5℃,to a point 2.0 to 2.5mm from the body of the unit. Using shielding Board(t=1.5mm) ,be held there for specified time(5D series: 5±1 seconds and other series:10 s ),and then be stored at room temperature and humidity for 1 to 2 hours. The change of V1mA and mechanical damages are examined.

10.Solvent resistanceof marking:Solvent: alcohol Rubbing material: cotton wool Recovery: 4hours.

Thereafter, visual examination and the change of V1mA shall be examined.

11.Component Solvent resistance:Solvent:70±5% and F113+30±5% strang third mellow mixture,Solvent temperature:23+5℃,5±0.5Min.Recovery: 4hours.Thereafter, visual examination and the change of V1mA shall be examined.

12. Robustness of Terminations:

After gradually applying the force specified below and keeping the unit fixed for ten seconds. The terminal shall be visually examined for any damage.Lead diameter(mm): 0.6 0.8 1.0 Force (N): 1 10 20