Relay contact inrush current

[Eelcos]

For a light switching application we use a PCB relay with a high inrush current rating (120A/20ms).
We frequently get questions from our customers, because they use lighting ballast (ECG's) with different current-time specifications for the inrush current.
Is there any theoretical model to compare the I-t specification of the relay with the practical I-t specification of the application, to see whether it is possible to switch this load with the relay without extreme contact degradation?
E.g.: Is it the I2t value (like a fuse) which defines the lifetime of the contact, or is it another quantity?

 

[itsmoked]

I don't think any piece of paper is going to solve your problem.

Check these to discussions:

thread238-413711

thread240-432503

Keith Cress
kcress -

http://www.flaminsystems.com