ECMF02-4CMX8 operating temperature

[Alex_Kucherov]

Hello,

My system is required to operate at -40C.

The datasheet states that low range ambient temperature is -30C, while the junction temperature is -40C.

Can you please explain the discrepancy between the two? Under what conditions can the junction temperature be lower than the ambient temperature?

Can I use the ECMF02-4CMX8 in my case?

Thank you in advance.

[TDK]

> Can I use the ECMF02-4CMX8 in my case?

> My system is required to operate at -40C.

> The datasheet states that low range ambient temperature is -30C

If you want to remain within the allowable limits of the datasheet, no this doesn't work. It's a bit odd, but that's what the DS says and we have no reason to distrust it. It's also on rev 4.

[Alex_Kucherov]

Hi TDK, 

It would still be helpful to understand the reason for the -30C limit, since as you mentioned, it is a bit odd. 

Does the -40C junction temperature refer to the TVS diodes while the -30C is limited by the common mode filter?  

[FGUIT · Accepted solution]

Hello,

The ECMF02-4CMX8 can be used at -40°C.

Datasheet will be modified with Top between -40°C and +85°C.

Best regards.

Fabrice.

[AFARD]

Good morning, my name is Arnaud Fardoit, I'm product marketing engineer in charge of filtering/protectino products for US region. We have been informed that our ECMF02-4CMX8 is going to be phase out very soon and not recommended for new design anymore. We recommend our ECMF2-40A100N6 for datalines, our ESDA17P20-1F2 for VBUS line and ESDZV5H-1BU2 for ID line. My colleague Fabrice has been informed about the change, sorry for the inconvenienced caused. Best Regards, Arnaud