DPS-300AB-81B – 300W POE/NVR Hard Disk Recorder Power Supply
Description
The DPS-300AB-81B is a compact SFX-style power supply used in POE-capable NVR/DVR hard-disk recorders. It provides a proprietary 20-pin mainboard power feed for the recorder logic and POE circuitry, along with multiple SATA power leads for drives. Designed for 100–240V AC mains, it’s a direct replacement for many surveillance recorders that require a –53V POE rail plus standard 12V/5V drive power.
Technical Specifications
- Part Number: DPS-300AB-81B
- Rated Power: 300W
- Input: 100–240V AC, 50/60 Hz (IEC C14 inlet, rear rocker switch)
- Primary DC Rails:
- –53V DC (POE feed to mainboard via 20-pin harness)
- +12V DC / +5V DC (drive power via SATA leads)
- Form Factor: SFX-style chassis with rear exhaust fan
- Protections: Over-current, over-voltage, short-circuit (typical for this series)
- Applications: POE NVR/DVR recorders, hard-disk video recorders
Connectors (as configured on this unit)
- 1 × 20-pin mainboard power connector
- 8 × SATA power connectors (HDD/SSD power)
- 1 × 4-pin peripheral power
Interchangeable / Replacement Part Numbers
- FSP350-20GSV (common cross-reference used in the same NVR class)
- Related Delta variants in the DPS-300AB-81* family used in recorder chassis (match rail requirements and harness)
✅ Confirmed Compatibility
- ✔ POE hard-disk recorders/NVRs that specify DPS-300AB-81B on the label or service manual
- ✔ Recorder platforms that require –53V POE to the board plus +12V/+5V for multiple SATA drives
- ✔ Surveillance systems with SFX-style PSU bay and 20-pin recorder harness
☑️ Key Features
- ☑️ Purpose-built POE rail (–53V) for recorder mainboards
- ☑️ High drive capacity — factory loom with 8 SATA power connectors
- ☑️ Wide-range AC input 100–240V for global use
- ☑️ Compact SFX footprint with rear rocker switch and fan
- ☑️ OEM Delta build quality for 24/7 video-surveillance duty
⚙️ Fit Notes
- This unit is not a standard PC ATX PSU. The 20-pin harness is proprietary to recorder mainboards; do not connect to a PC motherboard.
- Recorder models and sub-revisions can vary in rail needs. Match the exact part number and verify your board requires the –53V POE rail.
- SATA lead count is as listed for this unit (8); confirm your drive count and cable reach.
