stenzer
Advanced Member level 3
Hi,
I'm repairing a power supply board and I have noticed that the housing of an NTC, used as a inrush current limiter, shows cracks. Although it seems to be still functional, I want to replace it as I have to order replacement parts anyhow. As the NTC has been glued to keep it in place I'm not completely able to read the package marking. The closest I can came up is SCK-0510, which would be close to the ~5.5 Ohm I have measured wit a DMM. Measured diameter is ~19.5 mm and the thickness is ~4.5 mm.
The closest repleacement I can find is NTL10-005M, but it is barely available (at least at my preferred distributers). So my question would be how to select a suitable replacement? E.g. would the B57364S0509M000 fit? The resistance at 50°C as well as at 100°C of the B57364S0509M000 are similar of the SCK-0510 at the same temperature points. The most obvious differencee for me would be the maximum current of 10 A for the SCK-0510 compared to the 8.5 A of the B57364S0509M000 one. But here TDK is specifying the maximum current for the B57364S0509M000 up to 65°C compared to 25°C only for the SCK-0510. At this point I should mention the input circuitry is protected by a Time Lag (T)/Time Delay fuse with 5 A.
As I'm not really experienced with the selection of NTCs for inrush current limiting functions, I would appriciaty any guidance and input.
BR
I'm repairing a power supply board and I have noticed that the housing of an NTC, used as a inrush current limiter, shows cracks. Although it seems to be still functional, I want to replace it as I have to order replacement parts anyhow. As the NTC has been glued to keep it in place I'm not completely able to read the package marking. The closest I can came up is SCK-0510, which would be close to the ~5.5 Ohm I have measured wit a DMM. Measured diameter is ~19.5 mm and the thickness is ~4.5 mm.
The closest repleacement I can find is NTL10-005M, but it is barely available (at least at my preferred distributers). So my question would be how to select a suitable replacement? E.g. would the B57364S0509M000 fit? The resistance at 50°C as well as at 100°C of the B57364S0509M000 are similar of the SCK-0510 at the same temperature points. The most obvious differencee for me would be the maximum current of 10 A for the SCK-0510 compared to the 8.5 A of the B57364S0509M000 one. But here TDK is specifying the maximum current for the B57364S0509M000 up to 65°C compared to 25°C only for the SCK-0510. At this point I should mention the input circuitry is protected by a Time Lag (T)/Time Delay fuse with 5 A.
As I'm not really experienced with the selection of NTCs for inrush current limiting functions, I would appriciaty any guidance and input.
BR
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