Material, explained
PoE, PoE+ or PoE++?
Which PoE standard does my device need?
Choose the PoE standard required by the exact device, then size the switch for all switch-side allocations together. Source-side limits are 15.4 W for 802.3af, 30 W for 802.3at, and 60 W or 90 W for 802.3bt Types 3 and 4. Device-side power is lower. Neither an access-point label nor a switch's total port count establishes the required standard or power budget.
Both are defined by IEEE 802.3af, 802.3at and 802.3bt, published by IEEE.
How this verdict was reached
- Exact device PoE requirement
- Source-side versus device-side power
- Per-port support and total switch budget
- Powered-port count and project assumptions
The table separates source-side power from device-side power using the manufacturer reference linked below. Its standard ceilings are planning reference values, not measurements of a particular camera or access point.
For procurement, verify the device requirement, per-port support, total switch allocation and powered-port count separately. The calculator uses switch-side allocations and an explicit headroom assumption; it does not approve hardware compatibility or replace a project design.
Manufacturer references
Side by side
| Check | Power or count | Before approval |
|---|---|---|
| 802.3af / PoE | 15.4 W at the source; 12.95 W at the device | Check the exact device's supported PoE standard. |
| 802.3at / PoE+ | 30 W at the source; 25.5 W at the device | Do not substitute typical consumption for switch-side allocation. |
| 802.3bt Type 3 | 60 W at the source; 51 W at the device | Confirm the port supports the required type and class. |
| 802.3bt Type 4 | 90 W at the source; 71.3 W at the device | Verify the exact device, port and power-supply configuration. |
| Switch-wide budget | Sum the switch-side allocations of powered devices | Check total power independently from the per-port standard. |
| Powered-port count | One compatible powered port per device | Count PoE ports separately from non-PoE uplinks and reserve ports separately from watts. |
PoE, on the shelf
- Enterprise 8 PoE USW-Enterprise-8-PoE
- Pro 24 PoE USW-Pro-24-POE
- Standard 24 PoE USW-24-POE
- G5 Bullet UVC-G5-Bullet
- G5 Dome UVC-G5-Dome
- G5 Dome Ultra UVC-G5-Dome-Ultra
- Pro 48 PoE USW-Pro-48-POE
- Standard 48 PoE USW-48-POE
- 14” Vandal-Proof IR PoE Housing CP-UA-H14L100B-VP
- Dream Machine Special Edition UDM-SE
- Lite 8 PoE USW-Lite-8-PoE
- Lite 16 PoE USW-Lite-16-PoE
PoE budget, on the shelf
- Enterprise 8 PoE USW-Enterprise-8-PoE
- Pro 24 PoE USW-Pro-24-POE
- Standard 24 PoE USW-24-POE
- G5 Bullet UVC-G5-Bullet
- G5 Dome UVC-G5-Dome
- G5 Dome Ultra UVC-G5-Dome-Ultra
- Pro 48 PoE USW-Pro-48-POE
- Standard 48 PoE USW-48-POE
- 14” Vandal-Proof IR PoE Housing CP-UA-H14L100B-VP
- Dream Machine Special Edition UDM-SE
- Lite 8 PoE USW-Lite-8-PoE
- Lite 16 PoE USW-Lite-16-PoE
Other choices we get asked about
Still not sure which the job needs? Describe the run and our team will tell you, and quote it.
Data Systems · +91 99595 55222 (call or WhatsApp) · 040-27811708 · admin@datasystems.co.in · Secunderabad (HQ) · Vijayawada · Visakhapatnam · Mon to Sat, 9:30 to 7
Some images on this site were created with AI and the item supplied may not look exactly as shown. The part code, not the picture, decides what ships.
Corrections and editorial policy · Privacy · Terms · Material, explained · Brands · PoE calculator