120W 12V 10A Power Adapter for Synology DS918+ NAS – 4-Pin DIN

120W 12V 10A Power Adapter for Synology DiskStation DS918+

Replacement AC power adapter listed for the Synology DS918+ 4-bay NAS. This adapter is rated for 12V DC output at up to 10A (120W) and uses a four-pin DIN-style power connector. The 10A rating is the adapter's maximum available output current; the NAS draws the current it requires. Correct connector fit and pin assignment are essential. Do not substitute a visually similar adapter without confirming its wiring against the original unit and the NAS requirements.

Technical Specifications

• Compatible NAS: Synology DiskStation DS918+
• Power adapter rating: 120W maximum
• DC output voltage: 12V DC
• DC output current: 10A maximum
• AC input: Check the supplied adapter label for its supported mains voltage and frequency
• Connector: Four-pin DIN-style connector; verify exact connector model and fit
• Polarity: Confirm the exact pin numbering and wiring against the supplied adapter and a reliable DS918+ reference before connection

Is 12V 10A Compatible with the Synology DS918+?

A 12V DC adapter rated for up to 10A can be suitable for a device designed for 12V when the connector, pinout, polarity and power requirements also match. The 10A figure is the maximum current the adapter can supply, not current forced into the NAS. Compatibility must not be determined from voltage and amperage alone: confirm the physical connector and every pin assignment before use. If the original adapter label or wiring differs, do not connect this supply until a qualified technician has verified it.

Power Connector and Polarity

The DS918+ uses a model-specific multi-pin power connection. The polarity diagram is provided as a reference, but pin numbering depends on the viewing orientation. Verify the pin numbers from the correct connector-facing perspective and compare them with the actual adapter. Never rely on wire colours, connector appearance or a generic four-pin diagram alone. Incorrect wiring can damage the NAS.

Understanding 12V, 10A and 120W

The output rating of 12V at 10A represents a maximum capacity of approximately 120W. The voltage must match the device requirement. The adapter's current capacity indicates how much current it can provide at that voltage; it does not push 10A into the NAS continuously. A higher current capacity can be acceptable only when the voltage, connector, pinout and overall electrical specifications are correct.

Before Ordering

Check that the model printed on your NAS is DS918+. Compare the original adapter's output voltage, connector shape, number of contacts and pin assignment with the replacement. If the original label is available, use it as the first comparison point. Contact JS Bazar with clear photographs of the NAS model label, original adapter label and connector if you need help checking compatibility.

Safe Installation

Shut down the NAS correctly where possible and disconnect it from mains power before changing the adapter. Keep the adapter dry, avoid pulling the cable, and do not force the connector into the NAS. Connect power only after the voltage and pinout have been confirmed. Stop using any adapter with a damaged cable, cracked casing, exposed wiring, burning smell or signs of overheating.

Product Details and Ordering from JS Bazar

This JS Bazar listing is offered as a compatible replacement power adapter for the Synology DS918+ and is not represented as a genuine Synology-branded spare unless the physical product is explicitly marked as such. Product photographs help identify the adapter and connector; always confirm the printed ratings on the actual