Introduction: What the Ruijie RG‑NIS‑PA120‑48 Is and Why It Matters
The Ruijie / Reyee RG‑NIS‑PA120‑48 is a compact, industrial‑grade DIN‑rail AC/DC power supply that delivers 48 V DC at up to 2.5 A (120 W). Designed for commercial and industrial networking environments, this unit combines universal input capability, active power factor correction (PFC), a reported efficiency of about 94% at 230 VAC, and a comprehensive set of protection features. Whether you are powering industrial Ethernet switches, telecom equipment, or other DIN‑rail mounted devices, the RG‑NIS‑PA120‑48 aims to provide a reliable, space‑saving power source.
Note:Ruijie announced this model as End‑of‑Sale (EOS) for international markets effective 1 July 2024. Stock may be limited, and installers should check replacement recommendations such as the RG‑NIS‑PA120‑54 or equivalent designs when planning installs or spares.
Key Features at a Glance
- 48 V DC output at up to 2.5 A (120 W)
- Universal AC input: 100–240 V nominal (operating 85–264 VAC); vendor pages also report DC input capability (120–370 V DC) on the same terminal
- Active PFC for improved input performance and lower distortion
- High reported efficiency (~94% at 230 VAC), reducing heat and operating costs
- Comprehensive protections: short‑circuit, over‑current, over‑voltage, over‑temperature with self‑recovery modes
- 150% peak load capability for short bursts (~3 seconds) to handle inrush or PoE surges
- Compact DIN‑rail housing with modest weight and industrial temperature range
Detailed Specifications and Benefits
The RG‑NIS‑PA120‑48 is built around a set of electrical and mechanical characteristics that make it well suited to networking and industrial installations. Key electrical specifications include a steady 48 V DC output, a maximum continuous current of 2.5 A, and 120 W of rated power. The universal AC input supports 100–240 VAC nominal operation, and several vendor listings report a dual‑use terminal that accepts 120–370 V DC—useful for certain industrial power systems. Active PFC improves line behavior across the input range and helps the unit meet harmonics and power factor requirements common in commercial sites.
Efficiency is a critical metric for any power supply. With vendor‑reported efficiency around 94% at 230 VAC, the RG‑NIS‑PA120‑48 runs cooler and wastes less energy than lower‑efficiency units. That translates into reduced ventilation requirements, longer component life, and lower operating costs over time—important in tightly packed control cabinets or telecommunication racks.
Protection features are comprehensive: short‑circuit protection, an over‑current response that trips between roughly 110–200% of rated current with automatic recovery, over‑voltage protection implemented using a hiccup mode (limited to roughly ≤ ~60 V), and thermal shutdown with self‑recovery. Additionally, the unit is designed to tolerate brief peak loads up to 150% of rated power for about three seconds—helpful when powering devices that have significant inrush currents or when supplying PoE switches during transient events.
Mechanically, the RG‑NIS‑PA120‑48 uses a compact DIN‑rail housing commonly used in industrial automation and network closets. Reported dimensions and weight (approximately 128.8 × 21–42 × 110 mm and ~0.49 kg) make it easy to fit onto standard TS‑35 rails without consuming excessive cabinet real estate. The extended operating temperature range (‑40 °C to +70 °C) and relatively low leakage/ground current (≤ 1 mA reported) are consistent with ruggedized industrial designs.
The unit is listed to common safety standards (IEC / UL / BS EN 62368 as vendor‑listed). Ruijie support tables list a 3‑year warranty for this family of products, though installers should confirm the exact warranty with their reseller or distributor at time of purchase. Importantly, the EOS announcement (international) means planning for replacements, spares, and future compatibility is prudent—check Ruijie guidance for the recommended successor models such as the RG‑NIS‑PA120‑54.
Use Cases and Scenarios Where the RG‑NIS‑PA120‑48 Excels
There are several environments where this DIN‑rail power supply is particularly useful:
- Industrial networking closets— Powering 48 V industrial Ethernet switches and associated control devices where space is limited and reliability is essential.
- Telecom and remote cabinets— The wide input range and reported DC input capability make it suitable for locations that may use DC mains or hybrid AC/DC infrastructure.
- PoE switch supply— The 150% short‑burst capability helps accommodate PoE inrush and surge demands during link negotiation or powering connected PDs.
- Control panels and automation racks— Compact DIN‑rail footprint, high efficiency, and wide temperature range support use inside machine control enclosures or building automation cabinets.
- Field service and maintenance— The self‑recovering protection behavior simplifies troubleshooting and reduces downtime in many scenarios, because minor transients clear without manual intervention.
Installation should be performed by a qualified electrician or competent installer following local wiring rules. Verify whether the site uses AC or DC on the input terminals before wiring. Ensure proper earthing/grounding and observe ventilation requirements for the cabinet. For mechanical dimensions and final documentation, rely on the official Ruijie datasheet to ensure precise footprints and terminal spacing when designing panels.
How It Compares with Similar Products on the Market
In the 48 V, 100–150 W DIN‑rail category there are several well‑known manufacturers such as Mean Well, Delta, TDK‑Lambda and others. What sets the RG‑NIS‑PA120‑48 apart is its combination of high reported efficiency (~94%), active PFC, compact DIN‑rail form factor, and reported DC input capability. Many competing units offer similar basic ratings (48 V, 120 W) but may differ in efficiency, peak load handling, or thermal performance:
- Mean Well HDR‑120‑48 and equivalents— Mean Well has popular DIN‑rail 48 V models that are widely available and supported. They offer good reliability and broad distribution; however, efficiency and transient handling vary by model. In some cases the RG‑NIS‑PA120‑48’s reported ~94% efficiency is competitive or slightly better than comparable offerings.
- Industrial OEM units— Some industrial OEM power supplies include additional features like remote sense, DC OK relay outputs, or wider transient ratings. If you require auxiliary signaling or built‑in monitoring, evaluate whether those options are necessary—Ruijie’s offering focuses on compactness and essential protections rather than extensive signaling features.
- High‑reliability telecom supplies— Traditional telecom power plants or modular rectifiers will exceed a small DIN‑rail module in capacity and redundancy. The RG‑NIS‑PA120‑48 is targeted at edge or cabinet‑level supplies rather than central rectifiers.
Overall, the RG‑NIS‑PA120‑48 competes well on efficiency, footprint, and protection features. The EOS notice is the main lifecycle caveat—if long‑term availability and consistent part numbers are vital, confirm the replacement model or stock policies when specifying this unit.
Customer Feedback and Installer Impressions
Direct named customer reviews for this specific part are limited in the public domain, and availability changes following the EOS announcement. However, feedback from network installers and integrators who have used similar Ruijie/Reyee DIN‑rail supplies tends to highlight a few recurring themes:
- Positive impressions:installers commonly praise the compact DIN‑rail footprint, straightforward wiring, and the reassurance of active PFC with good efficiency. The ability to tolerate short bursts of peak load and the self‑recovering protections are appreciated in PoE and switch deployments.
- Practical cautions:buyers often advise confirming exact mechanical dimensions and mounting clearance from the official datasheet, and to keep spares or verified successors on hand after EOS announcements to avoid last‑minute supply issues.
If you are planning a project that relies on a steady supply of a particular part number, it is prudent to reach out to your Ruijie distributor to confirm current stock, warranty terms, and suggested replacements for the RG‑NIS‑PA120‑48.
Conclusion: Why Choose the RG‑NIS‑PA120‑48?
The Ruijie RG‑NIS‑PA120‑48 is a solid choice for engineers and installers who need a compact, efficient 48 V DIN‑rail power supply for industrial networking, small PoE switch deployments, and cabinet‑level power distribution. Its reported high efficiency, active PFC, robust protection set, and short‑burst peak capability make it well suited to real‑world transient loads and space‑constrained installations. The wide input tolerance and reported DC input support add flexibility for mixed AC/DC sites.
That said, the international End‑of‑Sale notice requires careful lifecycle planning. Confirm warranty and replacement options with your reseller, consider stocking approved substitutes such as the RG‑NIS‑PA120‑54 or equivalent models from established DIN‑rail suppliers, and use the official Ruijie datasheet for final mechanical and electrical integration. With those considerations addressed, the RG‑NIS‑PA120‑48 represents a pragmatic, performance‑oriented option for many industrial power needs.
Suggested retail context:this unit is positioned in the mid‑range for performance DIN‑rail supplies (suggested retail around $99.99 in some channels). For critical applications, evaluate the total cost of ownership including efficiency savings, warranty support, and the availability of approved replacements following the EOS announcement.
