Wire-to-board Connector

Table shows number of circuits vs size of wire. Larger wire = more current. Less wires = more current. Derating connector due to adjacent conductors.

SATA Power

I am using a fan hub that is connected to my PSU with a Molex connector. I would like to know how many amps the Molex connector can handle, and hence how much current the fan hub can draw. Wikipedia says it is rated for 11A per pin, and the Molex connector has 4 pins. Does this mean it has an ampacity of 44A?

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24pin definition

With the 14 AWG cable, you could get 11A on 12V circuit (Pins 1 and 2), 132W, and 11A on 5V circuit (Pins 3 and 4), 55W. Assuming power supply could source it.

Though camera FOV can be measured horizontally, vertically, or diagonally, it is more commonly measured horizontally, as most sensors are rectangular. This measurement is typically expressed in millimeters.

I bet a pc fan will use about 12 watts maximum, which is quite a bit lower, but if you look for how much watts the fan use combined and you leave a bit of headroom for the controller itself, you should be fine. In worst case, the fans will spin a little bit slower.

Molexconnector

The lens focal length and sensor size both factor into determining the FOV. Assuming the lens focal length is fixed, the larger the sensor, the larger the required FOV.

FOV is specified in one of two ways: angular field of view and sized field of view (object size at a specific working distance).

4-pin fanpinout

The wiki page is wrong (and right). With every circuit energized, for a 4 in-line connector, with 18 AWG wire is 9A/pin. 36A per connector theoretical maximum, if 105°C and 30°C are maintained. That is 18A supplied and 18A sunk (Ground).

As in designer is responsibe. There are other factors: Ambient Temperature. Insulation on wire. Wire length. Odds are that no actual circuit will have 18A sourced due to other factors.

Typically, power supplies supplied half that for peripherals (5A for both comes to mind). You try to avoid theoretical maximums for production.

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SATApinout

4-pinmolexconnector to power supply

Keep in mind that even though this is supported, it is not meant that it will actually be used. 8.5A is quite a bit of amps for any device. Phone chargers for example usually have only 1.2 Amps and upto 2-3 Amps for fast charge.

The maximum current that can be carried is a function of the maximum temperature of the housing (105°C) and the maximum temperature of individual connection (30°C) (and maximum temperature of wire insulation) (and length of wire) (and ambient temperature). More wires, the less total current.

Depending on what voltage goes over the wire will determine how much watt goes over the wire, as watt = voltage * amps. The Red wire has 12 volts, so it will draw 102watts maximum, where the Yellow wire has 5 volts, so it will draw 42.5 Watts maximum.

Molex4pin

Field of view (FOV) is defined as the maximum area that a device can capture. The larger the field of view, the more data can be captured at one time, so it will require fewer images to capture an entire target.

...are intended to be a guide in the selection of a connector family. All applications should be tested by the end user.

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