PDS-408G/AC - 8+3 Port 480W PoE+ Switch | Microchip
料号： PDS-408G/AC ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $945 | $945.00 |
| 10 | $899 | $8,990.00 |
| 50 | $859 | $42,950.00 |
| 100 | $819 | $81,900.00 |
| 500 | $779 | $389,500.00 |
PDS-408G/AC 概述
A PoE switch is a Layer-2 Ethernet switch with embedded power-sourcing equipment (PSE) controller functionality that injects DC voltage onto the unused twisted pairs (or all four pairs under 802.3bt) of 100BASE-TX / 1000BASE-T Ethernet cables to power connected powered devices (PDs) such as wireless access points, IP cameras, VoIP phones, and luminaires. The PDS-408G/AC belongs to the digital-ceiling PoE-switch family, which sits in the broader taxonomy: PoE switch -> managed Ethernet switch -> network infrastructure -> IT/OT building equipment. It is engineered specifically for high-density PoE lighting and digital-ceiling deployments where centralized low-voltage DC distribution is impractical.
Key differentiating features include per-port auto-class detection (the switch dynamically allocates power based on the PD's advertised class), fan-less convection cooling (silent operation suitable for above-ceiling plenums), automatic output PoE power based on PD device class, and full-power mode that guarantees 60 W on every port simultaneously. The chassis supports Layer-2 management features (VLAN, link aggregation, QoS) accessible via a web GUI, SNMP, or CLI, eliminating the need for a separate aggregation switch in mid-sized deployments.
Internally, the switch combines a managed switching ASIC with multiple PoE PSE controllers that perform IEEE 802.3bt handshake, inrush current limiting, and per-port load-disconnect on overload. The 480 W PoE budget is provided by an internal AC-DC converter inside the same chassis, so only a single mains connection is required.
Typical applications include digital-ceiling PoE lighting retrofits, enterprise wireless AP backhauls, IP-surveillance camera aggregation, smart-building sensor networks, and hospitality PoE deployments. For facilities managers replacing legacy 30 W PoE+ switches, the 90 W per-port capability is the principal upgrade driver because it supports higher-power luminaires and emerging IEEE 802.3bt PDs that older switches cannot power. A key design tip: budget total PoE load to 80 percent of the 480 W nameplate (about 384 W) to maintain headroom for inrush and Class-8 PD startup spikes on cold power-up.
直接替换替代料： PDS-408G/AC ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： PDS-408G/AC （相同外形与封装尺寸） ——差异在于 Cooling, Product Type, Management, Input Power, PoE Standard.
快速对比工具——选择替代料号进行并排对比：
PDS-408G/AC-US
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →PDS-408G/AC-EU
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联系询价
查看数据手册 →PDS-408G/AC-UK
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →PDS-408G/AC-AU
✅ 直接替换📋 参考替代料（不在目录中）
PDS-408G/F/M/AC
✅ 直接替换📋 参考替代料（不在目录中）
PDS-408G/AC 最大额定值与电气特性
| Product Type | Managed PoE Switch (PSE) |
| Total Ports | 11 (8 PoE + 3 uplink) |
| PoE Ports | 8 x Gigabit (10/100/1000BASE-T) |
| Non-PoE Uplink Ports | 3 |
| PoE Standard | IEEE 802.3bt (PoE++ Type 3/4), backward-compatible with 802.3at/af |
| Maximum PoE Power per Port | 90 W |
| Total PoE Budget | 480 W |
| Full-Power Mode | 60 W on all 8 ports simultaneously |
| Input Voltage | 100-240 V AC, 50/60 Hz |
| Power Input Connector | AC mains (US NEMA 5-15P) |
| Cooling | Fan-less (convection) |
| Mounting | In-ceiling / communications room (plenum-rated chassis) |
| Management | Web GUI, SNMP v1/v2c/v3, CLI, Telnet, SSH |
| Layer-2 Features | VLAN (802.1Q), Link Aggregation (LACP), QoS (802.1p/DSCP), STP/RSTP, Port Mirroring, Auto-MDI/MDIX |
| Per-Port Auto-Class Detection | Yes (dynamic power allocation by PD class) |
| LED Indicators | Per-port Link/Activity/PoE status |
| Compliance | IEEE 802.3, 802.3u, 802.3ab, 802.3at, 802.3bt, 802.1Q, 802.1p, 802.3ad |
| Package/Form Factor | Desktop / wall-mount metal chassis |
PDS-408G/AC desktop / wall-mount metal chassis 引脚配置指南
PDS-408G/AC（desktop / wall-mount metal chassis 封装）的引脚配置。 该功率器件具有栅极、漏极和源极端子。对于无极性封装，请参阅制造商数据手册以了解确切的引脚 1 方向和封装尺寸细节。常见应用包括电源设计、电机驱动和负载开关。
暂无详细引脚数据： PDS-408G/AC.
请参阅 数据手册 以查看完整引脚配置。
典型应用
PDS-408G/AC 适用于 7 应用s: Digital Ceiling PoE Lighting, Enterprise Wi-Fi 6E/7 AP Backhaul, IP Surveillance Camera Aggregation, Smart Building / IoT Sensor Networks, Hospitality and Retail PoE Deployment, Industrial Ethernet Aggregation, Classroom and Conference Room AV Systems.
Digital Ceiling PoE Lighting
The PDS-408G/AC's 480 W total budget and 90 W per-port 802.3bt capability are an ideal match for digital-ceiling PoE lighting retrofits. Each of the 8 PoE ports can supply 60 W in full-power mode, so the switch can directly power 8 high-output LED luminaires without any midspan injectors. Per-port auto-class detection ensures the switch dynamically allocates only what each luminaire actually needs. Compared with legacy 30 W PoE+ switches the PDS-408G/AC doubles the power available to each fixture, supporting tunable-white and circadian-rhythm luminaires that exceed 30 W. The fan-less convection chassis also suits above-ceiling plenums where fan noise and dust would shorten service life.
推荐
Enterprise Wi-Fi 6E/7 AP Backhaul
Wi-Fi 6E and Wi-Fi 7 access points frequently draw 35-65 W under load, exceeding the 30 W limit of legacy 802.3at switches. The PDS-408G/AC's 90 W per-port capacity under IEEE 802.3bt directly supports the latest high-power APs from Cisco, Aruba, and Ruckus without power negotiation failures. With 8 PoE ports each capable of 90 W, an entire 8-AP deployment can be powered from a single in-ceiling switch, eliminating the closet-side midspan rack and freeing valuable IDF space. The Layer-2 QoS features (802.1p/DSCP) prioritize management and CAPWAP traffic, while port mirroring supports wireless-controller packet capture.
推荐
IP Surveillance Camera Aggregation
Modern PTZ and multi-sensor IP cameras routinely demand 40-80 W for heater, IR illuminator, and motor control, which exceeds the 802.3at envelope. The PDS-408G/AC's 90 W per-port 802.3bt capability powers these cameras directly while the 480 W aggregate budget supports a full complement of 8 outdoor cameras running heaters in cold weather. The fan-less design is critical in sealed outdoor junction boxes where dust and moisture would attack fans, and per-port PoE enable/disable plus remote power-cycle let NOC staff reboot frozen cameras without a truck roll.
推荐
Smart Building / IoT Sensor Networks
Smart-building deployments concentrate dozens of low-power sensors (HVAC, occupancy, CO2, BLE beacons) onto structured Cat6 cabling. The PDS-408G/AC's 8 PoE+ ports each carry up to 90 W, so a single switch can directly power a mix of sensor hubs, IP-based lighting controllers, and PoE-powered BACnet gateways. The 3 non-PoE uplink ports provide a trunk to the building automation server room without consuming PoE budget, while LACP link aggregation bonds two uplinks for redundancy. Per-port auto-class detection minimizes wasted power when sensors draw only a few watts.
推荐
Hospitality and Retail PoE Deployment
Hotels, conference centers, and large retail stores deploy PoE for in-room displays, IP phones, APs, and digital signage. The PDS-408G/AC's quiet fan-less operation is essential in guest areas where switch noise would be objectionable, while its 480 W budget covers typical hotel-floor loads of 8 mixed 30-90 W endpoints. The 3 non-PoE uplinks allow stacking or daisy-chaining to a property-wide aggregation switch, and per-port VLAN tagging supports separation of guest Wi-Fi, IPTV, and back-office traffic. Per the Microchip datasheet, the in-ceiling form factor eliminates the IDF closet footprint on each floor.
推荐
Industrial Ethernet Aggregation
Factory floors and warehouses increasingly deploy PoE-powered industrial Ethernet equipment such as barcode scanners, panel HMIs, and IP-rated wireless bridges. The PDS-408G/AC supplies the 480 W needed to drive 8 PoE++ endpoints in industrial plenums or NEMA enclosures where the fan-less, sealed chassis is preferred. The 3 non-PoE uplink ports aggregate to a control-room managed switch via fiber media converters, while 802.1Q VLANs isolate OT traffic from IT and STP/RSTP prevents loops across redundant fiber paths. Per-port power-cycle capability can remotely reset hung scanners without a maintenance visit.
推荐
Classroom and Conference Room AV Systems
Modern classrooms and conference rooms run a mix of PoE-powered devices: beamforming microphone arrays, AV-over-IP encoders, PTZ cameras, touch panels, and PoE lighting controllers. The PDS-408G/AC's 8 PoE++ ports at 90 W each cover a typical AV rack from a single device, replacing the multiple PoE injectors and small switches usually required. Layer-2 QoS prioritizes Dante / AES67 audio traffic to maintain lip-sync, and port mirroring allows capture of AV streams for diagnostics. The fan-less operation eliminates projector-room noise during recordings, while the in-ceiling mount keeps the AV rack hidden.
推荐
推荐产品汇总
工程参考数据： PDS-408G/AC ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | PDS-408G/AC-US | PDS-408G/AC-EU | PDS-408G/AC-UK | PDS-408G/AC-AU | PDS-408G/F/M/AC |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Package / Form Factor | 8+3 port AC-input fan-less switch chassis | Identical 8+3 port fan-less switch chassis, US plug | Identical 8+3 port fan-less switch chassis, EU plug | Identical 8+3 port fan-less switch chassis, UK plug | Identical 8+3 port fan-less switch chassis, AU plug | 8+3 port fan-less switch chassis, regional-plug family |
| Total PoE Budget | 480 W | 480 W | 480 W | 480 W | 480 W | 480 W |
| Maximum per Port | 90 W (802.3bt) | 90 W (802.3bt) | 90 W (802.3bt) | 90 W (802.3bt) | 90 W (802.3bt) | 90 W (802.3bt) |
| PoE Ports | 8 | 8 | 8 | 8 | 8 | 8 |
| Total Ports | 11 (8 PoE + 3 uplink) | 11 (8 PoE + 3 uplink) | 11 (8 PoE + 3 uplink) | 11 (8 PoE + 3 uplink) | 11 (8 PoE + 3 uplink) | 11 (8 PoE + 3 uplink) |
| Power Input | 100-240 V AC, US NEMA 5-15P | 100-240 V AC, US NEMA 5-15P | 100-240 V AC, EU Schuko | 100-240 V AC, UK BS 1363 | 100-240 V AC, AU AS/NZS 3112 | 100-240 V AC, regional plug (US/EU/UK/AU) |
| Cooling | Fan-less convection | Fan-less convection | Fan-less convection | Fan-less convection | Fan-less convection | Fan-less convection |
| PoE Standard | IEEE 802.3af/at/bt | IEEE 802.3af/at/bt | IEEE 802.3af/at/bt | IEEE 802.3af/at/bt | IEEE 802.3af/at/bt | IEEE 802.3af/at/bt |
关键差异点
- Highest 90 W per-port 802.3bt Type-4 capability with 480 W aggregate in a fan-less in-ceiling form factor （对比 PDS-408G/AC-US)
- Identical electronics across regional plug variants reduce supply-chain complexity （对比 PDS-408G/AC-EU)
- Full-power mode (60 W on all 8 ports) without derating （对比 PDS-104GO)
设计说明
Estimated: at 480 W full PoE load the internal AC-DC converter draws about 540 W from the mains (assume 89% efficiency), so a dedicated 15 A mains circuit is required and the upstream breaker should have no other high-inrush loads on the same leg. Leave a 20% margin from the 480 W nameplate (i.e. treat 384 W as the practical continuous-load ceiling) to accommodate Class-8 PD cold-start inrush spikes that can briefly demand 1.5-2x the steady-state current.
Do not mix the 90 W Type-4 / 60 W Type-3 / 30 W Type-2 budget naively - the Microchip datasheet states that the switch supports any port up to 90 W but the aggregate cannot exceed 480 W. With one port at 90 W the remaining 7 ports share 390 W (about 55 W each worst case). When designing for full-power mode (60 W on all 8 ports = 480 W total) the headroom is exactly zero, so account for IEEE 802.3bt power-demotion and 2-event class-4 signatures before declaring ports 'live'.
The fan-less chassis dissipates waste heat through the metal enclosure into the plenum. Per Microchip design guidance, ensure at least 75 mm of clearance on all sides and avoid mounting directly above heat sources (transformers, fluorescent ballasts). When installed in a sealed NEMA enclosure, derate the PoE budget by approximately 20% and verify junction temperatures with a thermal probe during commissioning. The absence of forced airflow means a stalled fan in adjacent equipment will not bring cooling to this switch.
Plan cable runs to keep PoE cable bundles under 100 m per link (TIA-568 limits) and avoid running PoE cables parallel to mains wiring for long distances to minimize common-mode noise coupling. Use shielded Cat6A where the run is in a noisy industrial environment, and bond the cable shield at one end only to avoid ground loops. Leave service loops in the cable plant because the fan-less switch has no field-replaceable fan and the entire unit must be replaced if the internal converter fails.
合规信息
RoHS and REACH compliance per Microchip product page. AEC-Q100 not applicable (commercial-grade networking product, not automotive). Safety/EMC certifications listed as [DATA_NEEDED] in specs - refer to datasheet DS00003432B for the latest certification list.
