Homebrew PCBs

Most solid state relays I have need some form of heatsink . the thermal fuse only needs to interrupt power to the control board or the control signal to the relay. If your device draws more than 10 amps you can’t use a thermal fuse in the heater circuit , it will not carry the current

 

 

From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com] 
Sent: Tuesday, June 28, 2016 5:20 PM
To: Homebrew_PCBs@yahoogroups.com
Subject: [Homebrew_PCBs] Preferred orientation for each electrical connection ?

 

  

I'm making my first PCB for a thermostat for
an electric heater.   I need to connect the
electronics to several outside components:

  - a thermistor that goes in the oven
  - an thermal fuse to shut off power if it gets too hot
  - battery power & ground
  - 3-conductor connector to an external solid-state relay

I plan to use pin headers and matching sockets for each of
these four connections.    For each of these four connections,
what criteria should I use to determine whether to put the
pin header on the PCB and the matching socket on the connect-
ing cable, or vice versa ?

The thermostat itself and the SSR will fit into a plastic box that 
also contains the battery.    So my question pertains to orient-
ing the headers/sockets inside the plastic box.   None of
the connections will ever be disconnected without first removing 
four retaining screws from the lid of the plastic box.