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Power Supply Mis-match?


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Hello Arris Community! I just purchased a brand new Arris SB6190, but am a little concerned about the power supply. The modem is rated at 12V, 0.75A input, while the power supply that came with it is rated at 12V, 1A. For most electronics, I would only using a matching power supply to avoid damaging the device. Does the modem have some tolerance to make this acceptable, or was I somehow given the wrong power supply with my purchase? Thanks for the feedback!

Best answer by plemans

The modem will only pull the power it needs. You could use a 5A power supply and it’d still work fine. 

Its just a concern if the power supply can’t supply enough amperage. 

You usually see a power supply slightly above what is needed in case of efficiency differences between different supplies. 

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plemans
Juggernaut
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  • Juggernaut
  • 2189 replies
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  • May 18, 2023

The modem will only pull the power it needs. You could use a 5A power supply and it’d still work fine. 

Its just a concern if the power supply can’t supply enough amperage. 

You usually see a power supply slightly above what is needed in case of efficiency differences between different supplies. 


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  • Author
  • The Many
  • 1 reply
  • May 18, 2023
plemans wrote:

The modem will only pull the power it needs. You could use a 5A power supply and it’d still work fine. 

Its just a concern if the power supply can’t supply enough amperage. 

You usually see a power supply slightly above what is needed in case of efficiency differences between different supplies. 

Thanks! I was unsure if the modem had the ability to modulate the incoming current.


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