About MOS tube recommendation

xhd1099924128

About MOS tube recommendation [Copy link]

The 12VDC signal controls the on and off of the 24VDC relay. I want to use a MOS tube to drive it. Is there any economical and small MOS tube to recommend? If there is any other better solution, please let me know. Thank you!

chunyang

When using MOS, just make sure it has enough voltage resistance. The wire package power is not large, so using transistors is more reliable and cheaper, or it is because of the voltage resistance problem.

qwqwqw2088

Let's recommend MOS tubes without saying how many A

xhd1099924128

qwqwqw2088 posted on 2020-1-14 12:02 Let the recommended MOS tube not say how many A

Sorry, the relay used is HF49FD-024, the coil current is about 7.5mA

maychang

xhd1099924128 posted on 2020-1-14 12:25 Sorry, the relay used is HF49FD-024, and the coil current is about 7.5mA

As Chunyang said on the second floor, in your case, transistors (bipolar tubes) are more reliable, cheaper, and easier to drive.

maychang

xhd1099924128 posted on 2020-1-14 12:25 Sorry, the relay used is HF49FD-024, and the coil current is about 7.5mA

Note: Whether using a field effect tube or a bipolar tube, a freewheeling diode must be connected in parallel at both ends of the relay winding, otherwise the tube will easily be broken down when it is turned off.

qwqwqw2088

qwqwqw2088 posted on 2020-1-14 12:02 Let the recommended MOS tube not say how many A

2N7002 should meet the requirements, SOT-23 package is relatively small

N-channel, drain current, Id max: 280mA, voltage, Vds max: 60V

qwqwqw2088

qwqwqw2088 posted on 2020-1-14 12:02 Let the recommended MOS tube not say how many A

2N7002

SOT-23 package

N, Id max: 280mA, voltage, Vds max: 60V

btty038

2N7002

Triodes can be

PowerAnts

From a cost perspective, band-stop transistors are preferred.

PowerAnts

Explain why it is recommended to use band-stop transistors!

Ordinary small triode 2 cents and 5 cents, resistor 3 cents * 2 (pieces), processing fee 3 * 1 cent and 5 cents

Band-block transistor 3.5 cents, processing fee 1.5 cents, saving 2.6 cents