MikroTik PW48V-12V85W ±48V Telecom PSU CCR CRS r2

The MikroTik PW48V-12V85W solves a specific and real problem for network engineers working in telecom and data centre environments: MikroTik's Cloud Core Routers and CRS326-24S+2Q+RM ship with AC power supplies as standard, but -48V DC telecom power plants do not have AC outlets — they have DC bus bars. The PW48V-12V85W bridges that gap cleanly. Remove the existing PSU from the compatible CCR or CRS chassis, slide in the PW48V-12V85W, connect it to the -48V DC bus, and the router powers up from the telecom plant — no inverter, no AC adapter, no additional hardware required.

The -48V DC standard is the power backbone of telecom facilities globally. It was chosen for telecom infrastructure because of its safety characteristics (lower shock risk than AC), its battery backup compatibility (48V lead-acid and lithium battery banks are the standard for UPS and backup power in telecoms), and its efficiency over long cable runs within a facility. Any MSP, WISP, or enterprise IT team with equipment in a proper telecom facility or co-location data centre with -48V DC power distribution will encounter this requirement. The PW48V-12V85W means MikroTik hardware integrates directly into that infrastructure without compromise.

The supported input range of 36V to 57V covers the full operating range of a standard -48V telecom DC plant — from a discharged battery bank (approaching 36V) through float charge (typically 52–54V) to equalisation charge peaks. The polarity convention is important and must be followed: the positive terminal must be 36–57V higher potential than the negative terminal. In a standard -48V negative ground system, the negative terminal sits at -48V relative to ground, and the positive terminal sits at 0V (ground) — giving a potential difference of +48V across the terminals, well within the 36–57V supported range.

The open-frame form factor means the PW48V-12V85W is a bare PCB-level module — it has no housing, no IP protection (IP00), and no standalone enclosure. It is designed exclusively to be installed inside the chassis of a compatible CCR or CRS device. It is not field-serviceable in an exposed or outdoor environment and must only be handled and installed by qualified personnel with appropriate ESD and electrical safety precautions.

**Compatibility is strict.** MikroTik names the following compatible devices:

- Cloud Core Routers since revision **"r2"** — check the device label for the revision suffix. Earlier CCR revisions use a different PSU form factor and are NOT compatible with the PW48V-12V85W.

- **CCR2004-1G-12S+2XS** — explicitly listed as compatible.

- **CRS326-24S+2Q+RM** — explicitly listed as compatible.

Do not install the PW48V-12V85W in any CCR revision prior to "r2" or in any device not listed above. Confirm the exact revision of your CCR before ordering.

Key specifications:

- Input voltage: ±48V DC (supported range 36V to 57V), 3A

- Output voltage: 12V, 7A

- Form factor: Open frame (bare module, no housing)

- IP rating: IP00 — no ingress protection, chassis installation only

- MTBF: ~100,000 hours at 25°C

- Compatible devices: CCR since revision "r2", CCR2004-1G-12S+2XS, CRS326-24S+2Q+RM

- Product code: PW48V-12V85W

- Suggested price: USD 49.00

Note: This is a replacement power supply module. It is not a standalone device. For use inside compatible MikroTik CCR and CRS chassis only. Must be installed by qualified personnel. Verify CCR revision "r2" or later before ordering.