500-2000A Multilayer Chip Varistor Surface Mount Zinc Metal Oxide for Alarms

Product Specification

High Temperature Chip Multilayer Surface Mount Zinc Metal Oxide Varistor 07D561K ZOV Disk SMD

General Description Of The Zinc Metal Oxide Varistor

Multilayer varistors are zinc oxide (ZnO) based ceramic semiconductor devices with non-linear voltage-current characteristics (bi-directional) similar to back- to-back zener diodes. They have the added advantage of greater current and energy handling capabilities as well as EMI/RFI attenuation. The increasing use of electronics technologies in all areas require reliable protection against transient voltages that could damage the electronics circuitry as well as EMI/RFI attenuation to prevent signal distortion and to meet regulatory requirements. AMPFORT components help achieve both functions with single component.

Features Of The Zinc Metal Oxide Varistor

* Wide operating temperature -40~+125C

* Available in tape and reel packaging for automatic pick-and-place

* Certificated by CQC UL TUV

* Surface mount devices 

* Fully automatic production line

* Peak Current: 500 - 2000A

• Bi-Directional protection

• Very fast response to ESD strikes

• Multi-strike capability

• High Reliability

• EMI/RFI Filtering

• Wide range of components

Applciation Of The Zinc Metal Oxide Varistor

Over-voltage and transient voltage protection:

• IC Protection

• Micro Controllers

• Relays

• I/O Ports

• Keyboard Protection

• Portable devices

• Industrial Controllers

• Automation

• Smart Grid

• Telecom

• LED Lights

• Cameras

• Base Stations

• Motion detector

• Alarms 

Agency Approvals Of The Zinc Metal Oxide Varistor

Dimensions, Appearance Identification Of The Zinc Metal Oxide Varistor (mm)

Highly Recommended:
1. In the drawing board, it is recommended that the A solder joint be used as the L line, the B solder joint

as the N line, and the copper skin connected to the B solder joint is routed around the pressure-sensitive

chip circle (the entire diameter D should be regarded as belonging to the A solder joint.

2. For the sake of safety arcing, the circular edge of the chip should be at least 2.5mm away from any other

conductive device, as shown in the figure above (in order to prevent mutual displacement with other devices

during patching, if the space allows, please reserve the larger the interval is. Okay.)
3. The use of varistors in DC circuits has unfavorable factors. It is not recommended to use varistors in

rectified DC circuits. Please consider carefully or contact our company at 18128566098 (sales1@ampfort.net),

thank you!

Electrical Performance Of The Zinc Metal Oxide Varistor

For different voltage application environments, we recommend the following pressure sensitive

combinations to provide overvoltage, surge and lightning stroke protection for ACLED. 

Since pressure sensitive resistor is easy to degrade under the environment with strong voltage fluctuation,

it is required to select the combination with high pressure sensitive voltage value as much as possible

under the premise that withstand voltage of IC (MOS tube) +lamp bead on lamp board is pretty high

and that voltage has a large fluctuation area; besides, it is necessary to select pressure sensitive
resistor with large circulation and volume as far as possible, without exceeding cost limit.

Curve diagram of wave soldering Of The Zinc Metal Oxide Varistor

The picture above shows the approximate trend of the reflow oven temperature curve on the market. Our

SMD pressure sensor uses the silver electrode of the ceramic body as one of the welding electrodes.

Please pay attention to setting the oven temperature and time (if the highest temperature is 260°C,

please Note that the time is 3-8S, if it exceeds 30S, the protection effect of the varistor will be affected). 

Package Of The Zinc Metal Oxide Varistor

Precautions

1. The cumulative error of any 10 consecutive ratchet holes does not exceed ±0.2mm;
2. The non-parallel distance of 250mm in the length direction of the carrier tape shall not exceed 1mm;
3. The uninjected R angle is 0.2-0.3, and the uninjected demoulding slope is 5°;
4. Comply with EIA-481-D specification and ROHS requirements;
5. Thickness: 0.30±0.05mm;
6. The whole series of 05D 07D 10D adopts 15-inch reel and 24-inch feeder placement machine.

Varistor Selection Guide Of The Zinc Metal Oxide Varistor

Step 1. Determine the circuit's operating parameters.

Step 2. Calculate voltage value.

Step 3. Guidelines for Selecting a Varistor
Step 4. Verify the following system conditions.

4-a. Leakage current of the selected varistor is appropriate for the circuit ______True ______False
4-b. Verify the performance of the varistor under fault conditions ______Verified
Users should Independently evaluate the suitability of, and test each MOV device in their application for safety and suitability with the end application.