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Connecting to THT Lead

EFI Wiring Fundamentals

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Discussion and questions related to the course Motorsport Wiring Fundamentals

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Hi guys,

I'm trying to connect a temperature sensing sub-harness to THT leads on components that have Through-hole type PCB leads; I've got 4x 2 pin thermistors and 4x 3-pin TO-92 digital temp sensors.

Is solder & heatshrink the only option here? I haven't tried crimping but I don't get the feeling it will weld like a normal copper wire-to-wire crimp...

Any suggestions?

No room for a PCB and I've got over 100 of these to make so ideally nothing crazy expensive/labour intensive.

Thanks,

Kealan

[img="https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Fc.76.my%2FMalaysia%2Ftemperature-sensor-ds18b20-to-92-littlecraft-1612-12-littlecraft%403.jpg&f=1&nofb=1 [url=https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Faus3d.com.au%2Fimage%2Fcache%2Fcatalog%2Fproducts%2Fthermistor%2Fthermistor-source-800x800.jpg&f=1&nofb=1"]https://external-content.duckduckgo.com/iu/?u=https%3A%2F%2Faus3d.com.au%2Fimage%2Fcache%2Fcatalog%2Fproducts%2Fthermistor%2Fthermistor-source-800x800.jpg&f=1&nofb=1"[/url] alt=""]

Solder or crimp will be fine - the through hole legs are made from the same material and plating as is common for crimped wires so you should have no drama achieving a sound crimp. Either option is going to need equally serious strain relief so I would think solder is the easiest and most compact. The whole junction will really need to be potted if it is to survive in an automotive environment - or at bare minimum encapsulate in something rigid like SCL.

Cheers Adam,

Looking at the space constraint I think i'll go for potted solder as a first attempt & SCL failing that.