Phoenix STEP3-PS/1AC/KNX/640/LPT Power Supply
The Phoenix STEP3-PS/1AC/KNX/640/LPT Power Supply (Item No: 1477019 ) offers a 100 V DC ... 250 V DC -10 % ... +10 % input voltage range, > 86 % (120 V AC) efficiency, 30 V DC nominal output voltage, 640 mA () 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 | STEP3-PS/1AC/KNX/640/LPT |
Phoenix STEP3-PS/1AC/KNX/640/LPT Power Supply – Technical Specifications
| Specification | Value |
|---|---|
| Input voltage range | 100 V DC ... 250 V DC -10 % ... +10 % |
| Inrush current | typ. 35 A (25 °C) |
| Efficiency | > 86 % (120 V AC) |
| Nominal output voltage | 30 V DC |
| Nominal output current (IN) | 640 mA () |
| Residual ripple | typ. 100 mVPP |
| Short-circuit-proof | yes |
| Power loss nominal load max. | 3 W (230 V AC) |
| Insulation voltage input/output | 4 kV AC (type test) |
| Mounting type | DIN rail or direct mounting |
| Degree of protection | IP20 |
| Ambient temperature (operation) | -10 °C ... 70 °C (Derating > 45 °C: 2 %/K) |
| Frequency range (fN) | 50 Hz ... 60 Hz ±10 % |
Phoenix Contact STEP3-PS/1AC/KNX/640/LPT (Item No: 1477019) is engineered to deliver a constant 30 V DC output at 640 mA for KNX bus applications. It operates efficiently within a wide input voltage range of 100 V DC to 250 V DC (with -10% to +10% tolerance), offering excellent compatibility with global power infrastructures. The unit maintains a high conversion efficiency above 86% at 120 V AC and features a low power loss of 3 W at 230 V AC under nominal load. The output stability is enhanced by a residual ripple of just 100 mVPP, ensuring sensitive electronics are powered safely. It also includes integrated short-circuit protection and is insulated up to 4 kV AC for maximum safety and durability. Built with a rugged IP20 housing, the device supports DIN rail or direct mounting and operates across a wide ambient range of -10 °C to 70 °C, with thermal derating beyond 45 °C (2%/K).
This 30 V DC STEP Power Supply is optimized for powering KNX systems in smart buildings, lighting control systems, HVAC integration, and energy-efficient automation. It ensures uninterrupted operation for KNX bus lines, couplers, and system devices. Electrical and maintenance engineers will appreciate the straightforward installation, long service life, and strong electrical isolation—essential features for long-term control cabinet operation. For system integrators, it reduces the need for additional safety components thanks to built-in protections. It’s also an ideal training reference for engineering students exploring fieldbus automation systems.
Choose the Phoenix STEP3-PS/1AC/KNX/640/LPT (Part No: 1477019) for high-efficiency, space-saving, and KNX-certified power delivery. Visit official product page here. Keywords: KNX Power Supply, 30V DC STEP Power Supply, Phoenix Contact 1477019, KNX Bus Power, Compact DIN Rail Power Supply.
