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Phoenix STEP-PS/48AC/24DC/0.5 Power Supply
The Phoenix STEP-PS/48AC/24DC/0.5 Power Supply (Item No: 2868716 ) offers a 43 V AC ... 52 V AC input voltage range, > 81 % (for 48 V AC and nominal values) efficiency, 24 V DC nominal output voltage, 0.5 A (-25 °C ... 55 °C) nominal output current. Manufactured by Phoenix under the Phoenix Power Supply category, this model belongs to the Phoenix STEP Series.
| Brand | Phoenix Contact |
| Product Type | Power Supply |
| Model Number | STEP-PS/48AC/24DC/0.5 |
Phoenix STEP-PS/48AC/24DC/0.5 Power Supply – Technical Specifications
| Specification | Value |
|---|---|
| Nominal input voltage range | 48 V AC |
| Input voltage range | 43 V AC ... 52 V AC |
| Inrush current | < 10 A (typical) |
| Efficiency | > 81 % (for 48 V AC and nominal values) |
| Nominal output voltage | 24 V DC |
| Nominal output current (IN) | 0.5 A (-25 °C ... 55 °C) |
| Residual ripple | < 30 mVPP (20 MHz) |
| Power loss nominal load max. | < 3.4 W |
| Insulation voltage input/output | 4 kV AC (type test) |
| Mounting type | DIN rail mounting |
| Degree of protection | IP20 |
| Ambient temperature (operation) | -25 °C ... 70 °C (> 55 °C Derating: 2.5 %/K) |
| EMC requirements for noise emission | EN 61000-6-3 |
| EMC requirements for noise immunity | EN 61000-6-1 |
The Phoenix STEP-PS/48AC/24DC/0.5 (Item No: 2868716) delivers consistent 24 V DC output at 0.5 A, ideal for precision loads and signal devices. Operating within a compact input voltage range of 43 V AC to 52 V AC, this power supply is optimized for environments powered by 48 V AC mains. It offers high efficiency over 81% at rated input, helping reduce energy losses in compact installations. The residual ripple is under 30 mVPP, ensuring stable voltage even for sensitive analog and digital devices. With inrush current below 10 A and maximum power loss under 3.4 W, it guarantees smooth startup and low heat dissipation. The supply is rigorously tested to 4 kV AC insulation standards between input and output, meeting key EMC directives EN 61000-6-3 (emission) and EN 61000-6-1 (immunity). Housed in a rugged IP20 enclosure and compatible with DIN rail mounting, the unit performs reliably across -25 °C to 70 °C, with controlled derating beyond 55 °C.
This STEP Power Supply is suitable for small automation cabinets, sensor power distribution, and localized voltage conversion in building automation. Junior engineers will find it easy to install using standard DIN rails. For senior maintenance engineers, its low ripple and surge protection help prevent faults and reduce downtime in field devices. Engineering students exploring power supply designs can study its thermal derating and compact efficiency curve as a practical reference. Whether it’s powering signal repeaters, field isolators, or compact PLC modules, the STEP-PS/48AC/24DC/0.5 stands out as a reliable choice where space and efficiency matter.
For technical documentation, refer to the official Phoenix Contact product page here: STEP-PS/48AC/24DC/0.5 – Item No: 2868716.
