Hello,

I want to build myself a little circuit with triacs. As a housing for the circuit board I chose a Phoenix Contact housing to be installed in a switch cabinet. The supply lines are connected by means of PCB connectors. Depending on the number of poles, the connectors are available with different grid dimensions (5 mm or 7 mm) and the resulting rated voltages.

In the case of a connector with a 5 mm pitch, the technical data contains different voltages for different rated voltage classes.
Rated voltage (III/3) 250 V
Rated voltage (III/2) 320 V
Rated voltage (II/2) 630 V

What do these classes mean?
Is it possible to work with 230VAC at a grid dimension of 5 mm? The distance gets reduced by the holes on PCB, though the true clearance will be less.

Housing
https://www.phoenixcontact.com/onli...pcck=P-01-12-05-01&tab=1&selectedCategory=ALL

Connector
https://www.phoenixcontact.com/onli...ion=true&redirectTarget=country&redirectTo=DE

 

The terminals in question are rated IEC at 300v with a min of 5mm spacing.
630v is going to require a different class of connector.
Max.

 

what do the III/3 and others mean?

 

what do the III/3 and others mean?

Application Category?
https://en.wikipedia.org/wiki/Measurement_category
Max.

 

@Justus22
http://www.smpspowersupply.com/ipc2221pcbclearance.html
Max.

 

Note that pin spacing is just part of the problem. As these are pc board connectors, each pin has a copper pad around it. In terms of UL rules (60950 for computers and peripherals, other specs for other applications like medical) for pc board layout, the spacing that counts is the minimum distance between two adjacent pads. Oval pads are good for this because they can have the same surface area as a round pad (for good adhesion) but a larger distance between the edges for better creepage distance.

ak

 

As well as the previous link, there is a calculator here:
https://www.smps.us/pcbtracespacing.html
Max.

 

I'm sorry. I don't get it.
What does the category for measuring instruments have to do with the connector rating?

Is IEC 320 enough for 230 VAC voltages?

http://www.smpspowersupply.com/ipc2221pcbclearance.html
According to the website at 230 VAC = 322 Vpeak a distance of 2.5 mm is required. This should be doable with a pin spacing of 5 mm, minus the copper pad. Doesn't it?

 

IEC 320 is OK for 230vac, see post#7 for the foil spacing calculator.
Max.