Is the output voltage, the volts seen by the end product, really 42 volts? Are there any poe injectors that provided 5v poe?

It will deliver up to 48 volts - if you need 5 volts - please see item B019BLMWY0 here on Amazon

does power supply come with the injector?

You just need a power cord - C13 type - $1 at a goodwill store or $3 on Amazon B003MGB0IK

What is the difference of this item from Phihong model 722442?

Not absolute sure but may first thought would be wattage!

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⚡ Power your network with precision and style!

COMPACT DURABLE DESIGN - Non-vented case protects internal components while maintaining a sleek profile.
FLEXIBLE INSTALLATION READY - Midspan design supports easy integration into existing networks (AC power cord sold separately).
CERTIFIED IEEE 802 3 AF COMPLIANCE - Ensures reliable, industry-standard Power over Ethernet performance.
SEAMLESS POWER DATA INTEGRATION - Delivers 15.4W power and data over a single Ethernet cable for clutter-free setups.
DIAGNOSTIC LE DS FOR INSTANT FEEDBACK - Quickly monitor power and connection status to avoid downtime.

The Phihong PSA16U-480-POE is a compact, IEEE802.3af-compliant midspan injector delivering 15.4W of power and data over a single Ethernet cable. Featuring diagnostic LEDs and a durable non-vented case, it’s designed for seamless integration into professional network environments. Note: AC power cord not included.

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2878991₫

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Brand	Seasonic
Product Dimensions	23.88 x 6.35 x 18.03 cm; 198.45 g
Item model number	PSA16U-480(POE)
Manufacturer	Seasonic
Are Batteries Included	No
Item Weight	198 g
Guaranteed software updates until	unknown

Phihong PSA16U-480-POE - 15.4W 802.3af 1-Port POE - ** 3 leg Power cable NOT incl* - MIDSPAN, 16W, 10/100 0,5amp - Warranty: 1Y

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