RS PRO Toroidal Transformer 2 x 115 V AC Primary, 2 x 50 V AC Secondary, Dual Output, 4.3 kg, Surface Mount, 123-4048

The RS PRO 123-4048 is a high-quality toroidal transformer engineered for demanding power supply applications where low noise, compact design, and installation flexibility are essential. This model features a dual primary configuration of 2 x 115 V AC and dual secondary windings of 2 x 50 V AC, enabling users to connect windings in series or parallel to match various application requirements.

Built with an open toroidal core, this transformer provides superior efficiency and reduced electromagnetic interference compared to traditional laminated core transformers. The transformer supports surface mounting, simplifying installation in custom power supply builds and industrial control systems. With its substantial weight of 4.3 kg, the device is robust and durable, minimizing vibration and enhancing reliability in environments with frequent power cycling.

The transformer operates at frequencies ranging from 50 Hz to 60 Hz, and it is designed for maximum operational safety with a broad temperature specification: it can function reliably from a minimum operating temperature of 105°C up to a maximum of 180°C. This makes the 123-4048 suitable for use in challenging industrial environments where thermal stability is critical.

Convenient wire termination ensures ease of integration into power circuitry, while the 136 mm diameter and 70 mm height allow for compact installation in equipment racks or enclosures. Compliance with key international safety standards including UL51, EN615581 Class II, EN60065 Class II, and UL506 underscores the transformer's suitability for integration into certified systems.

Application areas for the RS PRO 123-4048 include industrial power supplies, audio amplifiers, test and measurement systems, medical devices (excluding direct patient contact), and any environment where high-voltage isolation and low leakage inductance are necessary. Its toroidal construction also ensures minimal hum and vibration, making it desirable for sensitive installations.

Whether you are building a new power system or upgrading existing equipment, this transformer delivers dependable performance for industrial, laboratory, commercial, and professional electronics.

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