Recently, Vishay Intertechnology, Inc. (NYSE: VSH) announced the launch of the industry's first 150V N-channel MOSFET, the SiA446DJ , in a small, thermally enhanced SC-70? package. With a footprint of 2mm x 2mm and the industry's lowest on- resistance at 10V, the Vishay Siliconix SiA446DJ improves efficiency in a variety of space-constrained applications by reducing conduction and switching losses.
The SiA446DJ is suitable for primary side switches in isolated DC/DC converters, boost converters in LED backlights, and Power over Ethernet (PoE) powered device switches, telecom DC/DC brick power supplies, and power supplies in portable electronic devices. Manage synchronous rectification and load switching for applications. For these applications, the PowerPAK SC-70 is 55% smaller than the 3mm x 2.8mm TSOP-6 package and has a 40% lower thermal resistance.
The link address of the SiA446DJ data sheet is: http://datasheet.eepw.com.cn/datasheet/show/id/3121137
Fabricated using ThunderFETTM technology, the SiA446DJ has a maximum on- resistance of 177mΩ, 185mΩ, and 250mΩ at 10V, 7.5V, and 6V. At 10V, the on- resistance of the device is 53% lower than that of the previous generation of devices in the TSOP-6 package. The product of the typical on-resistance and gate charge, which is a factor of 54%, improves efficiency. Moreover, the on-resistance of the SiA446DJ is 26% lower than the latest devices in the 3mm x 2.7mm SOT-23 package.
The SiA446DJ, combined with the previously announced 100V SiA416DJ in the PowerPAK SC-70 package and the 100V SiB456DK in the PowerPAK SC-75 package, expands the portfolio of Vishay medium voltage MOSFETs in a small, thermally enhanced package. The device is 100% RG and UIS tested, RoHS compliant, halogen free.
The function of the pointer type oil level gauge is to display the oil level in the transformer oil reservoir. Directly mounted on the tank wall. The float rod can transmit the lifting action of the float to the transmission shaft. The drive shaft is connected with the external pointer spindle. The float generally moves radially in the oil tank.
The Tubular Oil Level Gauge is used to judge whether the transformer is short of oil through the color in the observation window by floating the float up and down. Generally, the observation is full of red marks indicating that the transformer tank is short of oil and needs to be replenished; Patrol inspectors of glass tube type oil level gauge can directly see the amount of transformer oil through the height of the oil level line in the glass tube. When the oil level is below - 30 °, oil replenishment is required
YZF series oil level gauges produced by our company are used on oil conservators of fully sealed large and medium transformers. When the oil level in the oil conservator changes, the floating ball on the connecting rod of the oil level gauge swings up and down to drive the rotating mechanism of the oil level gauge to rotate. The oil level in the oil conservator is indicated on the dial by the pointer through the rotation of the magnetic coupler and the pointer shaft. The oil level gauge is equipped with an over limit oil level alarm mechanism, which can realize remote oil level monitoring.
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