MikroTik hAP ax2 and ax3: Passive PoE Voltage Is Not a Generic PoE+ Input

hAP ax² and hAP ax³ only; not hAP ax lite or every MikroTik product.

Applies to: hAP ax² and hAP ax³ only; not hAP ax lite or every MikroTik product.

The model-specific constraint

Both inspected models specify 18–28 V passive PoE input and 12–28 V DC jack input. Their passive output is on ether1, with different stated current ceilings: 0.6 A for ax² and 0.625 A for ax³.

Safe selection

1. Read the exact device label and injector output before attaching power. An injector described only as “PoE” is insufficient information.
2. Do not substitute a 48-V passive injector or assume an 802.3af/at source is equivalent to the specified passive input.
3. Check the downstream device's voltage, polarity/pin arrangement and required current before enabling passive output. A matching Ethernet plug proves none of these.
4. Keep total adapter capacity and attached load within the manufacturer's limits; the output-current figure is not a universal power budget for any attached device.

Verify / undo

Initially test the router without downstream powered equipment. Add a verified load only after the power plan is checked. If labels conflict or cannot be read, stop and use the supplied/approved adapter instead of experimenting. Remove added loads before restoring the original power arrangement.

Official evidence

• hAP ax² specifications — rf2-hap-ax2
• hAP ax³ specifications — rf2-hap-ax3

Editorial boundary: No hands-on testing was performed. Confirm the device label, current firmware and live official instructions before making changes. Never send passwords, VPN keys or complete configuration backups to RouterFix.

Referenced models

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