PDS-408G/AC-US - 8-Port PoE BT Switch 480W | Microchip
MPN: PDS-408G/AC-US ✓ Active| Qty | Unit Price | Extended |
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| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
PDS-408G/AC-US Overview
A digital ceiling PoE switch is a network switch with an integrated Power-over-Ethernet power sourcing capability, placed within the power management hierarchy above PoE controllers (such as Microchip PD69xxx PSE ICs) and below network management systems. It delivers both data and DC power over standard Ethernet cabling to powered devices (PDs) such as LED luminaires, sensors, and wireless access points.
Key features include automatic PoE power allocation based on the detected PD device class per IEEE 802.3bt, a 480W fan-less power design for silent ceiling deployment, 8 PoE output ports plus 3 additional uplink/service ports (11 ports total), and managed operation with remote management, VLAN support, and link aggregation as described in the product documentation.
Architecturally, the PDS-408G integrates an Ethernet switching fabric with PoE power sourcing equipment (PSE) circuitry and an AC-DC power stage sized for 480W continuous output. Per-port power is negotiated with each PD according to its class, up to the 90W BT ceiling, allowing mixed loads of lighting, cameras, and access points on a single switch.
Typical applications include PoE LED lighting for digital ceiling systems, building automation sensor networks, IP security cameras, and wireless access point deployments in commercial buildings where ceiling or communications-room mounting eliminates the need for per-fixture AC wiring.
Design consideration: verify that the aggregate PD class-based power draw across all 8 ports stays within the 480W budget, and confirm local AC mains input and cord region compatibility - the /AC-US suffix denotes the US plug variant.
This page synthesizes distributor availability, region-variant drop-in alternatives, and practical deployment notes not found in the manufacturer datasheet.
Drop-in alternatives for PDS-408G/AC-US — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PDS-408G/AC-US (same form factor and footprint) — differing in Cooling, Product Type, PoE Standard, Management, Input Power.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
PDS-408G/AC-EU
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View Datasheet →PDS-408G/AC-UK
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View Datasheet →PDS-408G/AC-AU
✅ Drop-In📋 Reference alternative (not in catalog)
PDS-408G/AC
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$779 / Unit
View Datasheet →PDS-408G/F
✅ Drop-In📋 Reference alternative (not in catalog)
PDS-408G/M
✅ Drop-In📋 Reference alternative (not in catalog)
PDS-408G/AC-US Specifications (manufacturer-published)
| Product Type | Digital Ceiling PoE Switch (managed) |
| Total PoE Ports | 8 |
| Total Ports | 11 (8+3) |
| Total PoE Power Budget | 480 W |
| Maximum Per-Port Power | 90 W |
| Full Power Mode | 60 W on all 8 ports simultaneously |
| PoE Standard | IEEE 802.3bt-compliant (also supports 802.3at-class PDs) |
| Power Allocation | Automatic, based on PoE PD device class |
| Cooling | Fan-less (silent operation) |
| Deployment Location | Ceiling or communications rooms |
| Management | Managed (remote management, VLAN, link aggregation) |
| Input Power | AC input, US plug cord (AC-US variant) |
| Enclosure Type | Fanless switch enclosure for ceiling mount |
| Manufacturer | Microchip Technology (originally Microsemi) |
PDS-408G/AC-US Interfaces & Connectors
PDS-408G/AC-US exposes the following interfaces and connectors as published by the manufacturer: Power Input. Expansion header pinout, connector pin numbering, and electrical limits are defined in the manufacturer documentation.
| Power Input | 8 |
Refer to the manufacturer documentation for the full expansion header pinout and connector pin numbering.
Power & Thermal Characteristics
| Power Input | 8 |
| Cooling | Fan-less (silent operation) |
Power input and thermal parameters for PDS-408G/AC-US as published by the manufacturer.
Typical Applications
PDS-408G/AC-US is suitable for 6 applications: PoE LED Lighting (Digital Ceiling), Building Automation and Sensor Networks, IP Security Camera Deployment, Wireless Access Point Powering, Smart Office Retrofit Deployments, Communications Room and Structured Cabling Power Hub.
PoE LED Lighting (Digital Ceiling)
The PDS-408G/AC-US is purpose-built for digital ceiling PoE lighting, per the Microchip product page. Its 480W total budget with automatic class-based allocation lets a single switch power a mixed luminaire population, while the IEEE 802.3bt 90W per-port maximum covers high-output fixtures and the full-power 60W x 8 port mode supports uniform LED layouts. Luminaires receive both data and power over standard Ethernet cable, eliminating per-fixture AC wiring and electrician costs. The fanless design is essential in occupied ceiling spaces where fan noise is unacceptable, and managed VLAN support isolates lighting traffic on the corporate network.
Recommended
Building Automation and Sensor Networks
Occupancy, environmental, and control sensors mounted in ceilings benefit from the PDS-408G's combination of low-power Ethernet ports and centralized 480W PoE budget. Class-based automatic power allocation means low-power Class 1-3 sensors draw only their negotiated allocation, preserving headroom for higher-class loads on the same switch. The 3 additional ports provide uplink or local controller connectivity, and managed features such as VLAN and link aggregation segment building-automation traffic. Because the unit is fanless and ceiling-rated, it mounts directly above the sensor zone, shortening cable runs and simplifying commissioning of smart-building retrofits.
Recommended
IP Security Camera Deployment
IP cameras, including PTZ models that need the higher 802.3bt power classes, are well served by the PDS-408G/AC-US: any port can deliver up to 90W, so pan-tilt-zoom cameras with heaters negotiate their full class while fixed cameras draw their standard allocation, all against the 480W budget. Automatic class-based power output removes manual configuration per camera. The managed switch fabric supports VLANs to segregate video traffic and link aggregation for uplink bandwidth. Ceiling or communications-room mounting keeps the fanless switch out of sight while its remote management allows security teams to monitor per-port power status.
Recommended
Wireless Access Point Powering
Modern 802.11ax/Wi-Fi 6 and Wi-Fi 7 access points frequently require IEEE 802.3bt Class 6-8 power, which the PDS-408G/AC-US supplies at up to 90W per port. In ceiling deployments, the switch itself can sit in the plenum near the APs, with the 3 additional ports providing uplinks back to the core network and managed link aggregation combining uplinks for congested AP clusters. The 480W budget comfortably powers a mix of high-power and standard APs plus ancillary devices. Automatic class negotiation ensures each AP draws exactly its requirement without per-port configuration.
Recommended
Smart Office Retrofit Deployments
In retrofits where adding AC circuits is costly, the PDS-408G/AC-US lets installers reuse existing Category cable to power lighting, sensors, and access points from a single ceiling-mounted 480W source. Class-based PoE allocation means mixed legacy 802.3at and new 802.3bt devices coexist on the same switch, and the managed VLAN and remote management features let facility IT integrate the powered infrastructure without site visits. The fanless, silent enclosure suits occupied office environments, and the US-plug AC-US variant connects to standard North American mains for rapid deployment.
Recommended
Communications Room and Structured Cabling Power Hub
Beyond the ceiling, Microchip positions the PDS-408G for communications rooms, where it acts as a compact 480W PoE hub for downstream devices on structured cabling. Its fanless construction reduces cooling load and dust intake in closed closets, improving reliability versus fanned switches. Automatic per-port power by PD class simplifies adds/moves/changes: new devices are powered correctly on plug-in without configuration. The 8+3 port count covers eight powered endpoints plus dedicated uplink/service ports, and managed diagnostics allow remote troubleshooting of both data links and PoE delivery.
Recommended
Recommended Products Summary
Engineering reference data for PDS-408G/AC-US — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PDS-408G/AC-EU | PDS-408G/AC-UK | PDS-408G/AC-AU | PDS-408G/AC | PDS-408G/F |
|---|---|---|---|---|---|---|
| Package | Fanless managed switch enclosure (8+3 port), US AC cord | Same enclosure - EU AC cord | Same enclosure - UK AC cord | Same enclosure - AU AC cord | Same enclosure - base AC ordering code | Same family enclosure - different input config |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Total PoE Power Budget | 480 W | 480 W | 480 W | 480 W | 480 W | 480 W |
| Max Per-Port Power | 90 W (IEEE 802.3bt) | 90 W | 90 W | 90 W | 90 W | 90 W |
| Port Count | 8+3 (11 total) | 8+3 | 8+3 | 8+3 | 8+3 | 8+3 |
| PoE Standard | IEEE 802.3bt-compliant | IEEE 802.3bt-compliant | IEEE 802.3bt-compliant | IEEE 802.3bt-compliant | IEEE 802.3bt-compliant | IEEE 802.3bt-compliant |
| Cooling | Fan-less | Fan-less | Fan-less | Fan-less | Fan-less | Fan-less |
| AC Cord / Plug Region | US plug (AC-US) | EU plug | UK plug | AU plug | Base code (cord per ordering table) | Different input configuration |
| Management | Managed (remote mgmt, VLAN, link aggregation) | Managed - same feature set | Managed - same feature set | Managed - same feature set | Managed - same feature set | Managed - same feature set |
Key Differentiators
- Complete certified 802.3bt solution vs discrete PSE IC builds (vs PD69220C-022419)
- 90W per-port BT power headroom (vs PDS-408G/AC-EU (and all family variants))
- Fan-less silent operation for occupied ceiling spaces (vs PDS-408G/F (input-config variant))
Design Notes
Budget the aggregate PoE load before deployment: the PDS-408G provides 480W total, with full-power mode of 60W on all 8 ports and a 90W ceiling on any single port per IEEE 802.3bt. Sum the negotiated class power of all connected PDs and keep at least 10-15% headroom for inrush and future additions. If a mix of high-class BT loads exceeds 480W, split them across two switches rather than relying on per-port caps alone, since the per-port negotiation does not by itself enforce the system budget.
The PDS-408G is fan-less, so all 480W-relevant losses are dissipated passively through the enclosure. In ceiling or plenum installations, verify ambient temperature near the mounting location, especially above LED drivers or in unventilated enclosures. Maintain the clearances specified in the Microchip datasheet DS00003432B and never mount the unit inside a sealed junction box; passive designs depend on free convection around the housing for their rating.
Match the ordering suffix to the local mains plug: /AC-US, /AC-EU, /AC-UK, or /AC-AU per the datasheet ordering table; ordering the wrong region variant delays installation even though the hardware is identical. Also confirm the PD class of each endpoint - legacy 802.3af/at devices negotiate lower classes automatically, but devices wired for non-standard high-power modes may not receive full power without 802.3bt LLDP class negotiation support on the PD side.
Compliance Information
Product summaries state compliance with multiple safety and regulatory standards, but specific RoHS/REACH certificates were not enumerated in the verified data. IEEE 802.3bt compliance is confirmed per the Microchip product page and datasheet. The product originated from Microsemi (acquired by Microchip Technology).