DIN Rail Transformers

DIN rail transformers are integral components within industrial and commercial electrical systems, providing isolated, stable, and safe power conversion in compact form factors. By mounting directly onto standard DIN rails within control cabinets and enclosures, these transformers support reliable low-voltage distribution for automation, instrumentation, and process control.

RS Philippines offers a wide portfolio, including DIN rail transformers, DIN mount transformers, and panel mount transformers, with voltage options such as 24V DIN rail transformers to meet diverse application requirements.

What Are DIN Rail & Panel Mount Transformers

DIN Rail Transformers

A DIN rail transformer is a compact power transformer engineered to mount directly onto standard DIN rails (commonly EN 50022, 35 mm wide). The form factor allows straightforward integration into modular industrial control panels and electrical cabinets, ensuring consistent power delivery in industrial automation environments. Their design emphasises quick installation, modularity, and resistance to mechanical vibration.

Panel Mount Transformers

A DIN panel transformer or panel mount transformer is configured for direct bolting or screwing onto enclosure panels. Unlike DIN-rail-mounted units, these are intended for more permanent, high-reliability installations. Panel mounting provides improved mechanical stability, making them suitable for environments subject to high levels of mechanical stress.

Standards and Benefits

DIN rail and panel mount transformers are produced to comply with IEC and EN standards, ensuring compatibility and safety. Key benefits include:

• Space Efficiency: Compact housings conserve valuable panel space.
• Rapid Installation: Features such as spring clips or quick-release terminals facilitate swift mounting and wiring.
• Modularity: Easily combined with other DIN-mounted devices such as circuit breakers or relays.
• Vibration Resistance: Designed to maintain stable operation in dynamic or high-vibration environments.

24V DIN Rail Transformers

The 24V DIN rail transformer is one of the most widely applied variants, delivering low-voltage AC or DC outputs tailored for industrial control systems. These transformers are indispensable in automation and instrumentation, as 24V supplies are standard for relays, PLCs, and sensors.

Industrial Benefits of 24V Transformers

• Control Circuits: Provide safe, standardized low-voltage for operator interfaces, relays, and PLC inputs.
• Lighting & Alarms: Powering signalling lamps, beacons, and alarm modules.
• Automation: Reliable supply for actuators, solenoids, and low-power motor drives.
• HVAC Integration: Commonly used in thermostat and sensor networks.

Protection & Reliability

Modern DIN rail mount 24V AC transformers incorporate protective features such as:

• Overcurrent protection to prevent damage from excessive current loads that are above the normal operating limit but below a direct short-circuit level.
• Short-circuit protection for enhanced safety under fault conditions.
• Thermal overload safeguards to safeguard against overheating and prolong lifespan.

These features ensure both operational continuity and extended service life.

How Do DIN Rail & Panel Mount Transformers Work

Electromagnetic Principle

A transformer consists of a primary coil and a secondary coil wound around a common magnetic core. When an alternating current (AC) voltage is applied to the primary coil, it generates a fluctuating magnetic field.

This magnetic field, confined within the core, then induces an AC voltage in the secondary coil. The ratio of the number of turns in the primary coil to the number of turns in the secondary coil determines the step-up or step-down ratio of the transformer, thereby providing the desired output voltage.

DIN Rail Integration

DIN rail and panel mount transformers are designed for plug-and-play operation. Once snapped onto a rail, they integrate seamlessly with adjacent control devices. Quick-release terminals allow fast wiring, while modularity ensures straightforward replacement or system expansion.

Types of DIN Rail Transformers

24V DIN Rail Transformers

These step down the mains voltage (e.g., 230V) to 24V AC/DC to power common control devices like PLCs, sensors, and relays.

Isolation DIN Rail Transformers

They provide galvanic isolation (no direct electrical path) between the input and output. This enhances safety, prevents ground loops, and protects sensitive equipment, making them ideal for medical and industrial applications.

Safety DIN Rail Transformers

Safety DIN Rail Transformers comply with standards such as EN 61558, delivering extra-low voltage (SELV) output to minimize electric shock risk. They are suitable for machinery, automation, and applications requiring maximum operator protection.

Control DIN Rail Transformers

Control transformers supply stable voltage to motor starters, machine tools, and control cabinets. They maintain consistent output under fluctuating loads, supporting reliable operation in industrial automation and preventing voltage dips that could reset sensitive controls.

Multi-Output DIN Rail Transformers

Multi-output transformers provide multiple secondary voltages from a single unit. This reduces wiring complexity and saves space in control panels that require different voltage levels.

Key Specifications & Features

When selecting a DIN rail transformer, it is important to understand the key specifications that determine its suitability for your application:

• Voltage (Input/Output): Match the primary input to your supply (e.g., 220V/230V single-phase or 380V/400V three-phase in the Philippines) and the secondary output to your devices (e.g., 12V, 24V AC/DC).
• Power / VA Rating: The power rating, expressed in volt-amperes (VA), indicates how much load the transformer can supply. It is essential to choose a rating that covers the total consumption of all connected devices, with additional capacity for inrush currents or future expansion.
• Voltage Regulation: Voltage regulation describes how stable the secondary output remains under load. Transformers with low regulation maintain a more consistent voltage, which is important for sensitive equipment and reduces unwanted heat generation.
• Efficiency and Heat Dissipation: A more efficient transformer wastes less energy as heat, leading to lower operating costs and longer service life. Good efficiency also reduces the need for additional cooling inside control enclosures.
• Insulation and Safety Standards: Look for compliance with IEC/EN standards and essential protections like thermal overload and short-circuit safeguards.
• Mounting and Dimensions: The transformer must physically fit into the available panel space and be compatible with standard DIN rail profiles, most commonly the 35 mm "top hat" rail (IEC/EN 60715). The unit's width, often measured in standard "modules" (e.g., 17.5 mm per module), is a key consideration for panel layout.
• Environmental and Mechanical Performance: Operating temperature range, vibration resistance, and cooling requirements are important for reliable performance. Some transformers are built to withstand harsh industrial conditions, ensuring stable operation in demanding environments.

Applications of DIN Rail Transformers

• Medical Systems: Provide isolated power for medical devices, ensuring stable and clean energy supplies for sensitive diagnostic equipment.
• Testing & Measurement: Enable controlled low-voltage outputs for laboratory benches, supporting load simulations and prototype testing.
• HVAC Systems: Deliver reliable 24V supplies for thermostats, actuators, and sensor arrays within climate control panels.
• Process Control & Automation: Used across manufacturing lines to step down voltages for PLCs, SCADA interfaces, and distributed instrumentation networks.
• Power Transfer Between Circuits: Facilitate safe energy transfer between isolated circuits operating at different voltage levels, ensuring electrical separation and compliance with safety standards.

The Leading Supplier and Distributor of DIN Rail Transformers in Philippines

RS is your trusted source for high-performance DIN rail transformers. We offer a comprehensive selection from trusted industry leaders like Legrand, ABB, and Siemens. Our inventory covers a wide array of types and voltage ratings at competitive prices, guaranteeing you'll find the ideal DIN rail transformer for your specific requirements.

We also stock other vital industrial components, including DIN rail power supplies, circuit breakers, and terminal blocks, to complete your control panel setups. Buy your single-phase transformers, three-phase transformers, control transformers, and other related accessories online from us today. For more information regarding our ordering procedures, delivery options, and shipping fees throughout the Philippines, please visit our dedicated delivery page.