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Phoenix STEP3-PS/1AC/24DC/4/PT Power Supply
The Phoenix STEP3-PS/1AC/24DC/4/PT Power Supply (Item No: 1140066 ) offers a 110 V DC ... 250 V DC -20 % ... +40 % input voltage range, > 93 % (120 V AC) efficiency, 24 V DC nominal output voltage, 4 A 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/24DC/4/PT |
Phoenix STEP3-PS/1AC/24DC/4/PT Power Supply – Technical Specifications
| Specification | Value |
|---|---|
| Input voltage range | 110 V DC ... 250 V DC -20 % ... +40 % |
| Inrush current | typ. 37 A |
| Efficiency | > 93 % (120 V AC) |
| Nominal output voltage | 24 V DC |
| Nominal output current (IN) | 4 A |
| Residual ripple | typ. 150 mVPP |
| Short-circuit-proof | yes |
| Power loss nominal load max. | < 5.7 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: > 50 °C; 2 %/K) |
| Frequency range (fN) | 50 Hz ... 60 Hz ±10 % |
The Phoenix STEP3-PS/1AC/24DC/4/PT (Item No: 1140066) is a compact and high-performance STEP Power Supply designed to support stable DC output in demanding automation environments. It accepts a wide input voltage range of 110 V DC to 250 V DC with an extended tolerance of -20% to +40%, making it highly adaptable across varied power conditions. The supply operates with a typical inrush current of 37 A and delivers exceptional efficiency over 93% at 120 V AC, significantly reducing energy losses. The nominal output voltage of 24 V DC at 4 A ensures reliable power for connected control devices, while a low residual ripple of just 150 mVPP supports smooth operation of sensitive loads. Built-in short-circuit protection and high 4 kV AC insulation between input and output ensure safety during operation. With a power loss of under 5.7 W at nominal load and IP20 protection, this unit is ideal for compact enclosures. It supports DIN rail or direct mounting and performs efficiently in ambient temperatures from -10 °C to 70 °C, with thermal derating beginning above 50 °C.
This 24 VDC 4 A STEP Power Supply is widely used in PLC panels, I/O modules, sensors, and building automation controllers that demand a robust and stable power source. Electrical maintenance engineers can install it quickly due to its compact design and standard mounting options. For senior engineers working on SCADA systems or control cabinets, this model ensures consistent voltage delivery without overloading sensitive devices. Even students in instrumentation labs or automation training institutes can benefit from using this supply to simulate real-world industrial setups safely. Whether you are powering process instruments or industrial gateways, the STEP3-PS/1AC/24DC/4/PT offers the balance of safety, efficiency, and reliability needed for critical applications.
If you’re searching for a high-performance 24 VDC 4 A Power Supply with compact design and energy efficiency, the Phoenix Contact STEP3-PS/1AC/24DC/4/PT (Item No: 1140066) is an ideal choice. View the official product page here. Secondary Keywords: 24V 4A Power Supply, STEP3 Series PSU, Phoenix DIN Rail Power Supply, Industrial Power Supply 1140066.
