TEL 2-2410 Isolated DC-DC Converter for 24V Industrial Power Rails

ElecSuppliers Part Number GuideAug 25, 2026

TEL 2-2410 Fits a Common Industrial Power Requirement

A 24V supply is widely used in industrial equipment, but many electronic circuits connected to that supply need a much lower voltage.

Controllers, communication interfaces and digital circuits may require a 3.3V rail. When the lower-voltage section also needs electrical isolation from the main supply, the power architecture becomes more complicated.

The TEL 2-2410 addresses this type of requirement with an isolated DC-DC conversion approach, making it suitable for equipment where a 24V-class input needs to be converted into a low-voltage isolated supply.

From a 24V Rail to a Low Voltage Circuit

The useful feature of the TEL 2-2410 is its ability to work with an input range of 18V to 36V rather than requiring an exactly fixed input voltage.

That range fits naturally into many systems built around a nominal 24V supply.

The output side provides 3.3V with up to 500mA of available current, giving designers a straightforward way to supply lower-voltage electronic circuitry without building a complete isolated converter from individual switching components.

Why Isolation Can Matter on a Control Board

Not every voltage conversion needs isolation.

If the input and output circuits can safely share the same ground, a conventional non-isolated regulator may be the simpler choice.

The situation changes when different parts of a system need separate electrical domains.

An isolated converter can help prevent unwanted direct current paths between those sections. This can be useful around communication interfaces, measurement circuits and industrial control electronics where ground potential differences may create unwanted behavior.

Where TEL 2-2410 Can Fit

The TEL 2-2410 is particularly relevant to equipment built around industrial DC power.

A typical example is a control system supplied from a 24V cabinet power rail while its digital electronics operate at 3.3V.

Other possible applications include isolated interface circuits, instrumentation, industrial controllers and auxiliary power sections.

The converter can also be useful when engineers want to keep the power conversion stage compact instead of developing a discrete isolated supply.

Through-Hole Construction Has Its Own Advantages

Modern electronic products increasingly rely on surface-mount components, but through-hole modules still have a place in industrial equipment.

A through-hole converter can be convenient when the PCB needs strong mechanical retention or when the product is assembled and serviced differently from a high-volume consumer device.

For prototypes and equipment with relatively generous board space, the module format can also simplify installation and replacement.

What Engineers Should Check Before Using TEL 2-2410

The first consideration is the complete power budget.

A 3.3V load drawing 500mA represents a 1.65W output requirement, so the downstream circuit should be evaluated against the converter's available output power.

Input conditions are equally important. The actual system voltage should remain within the converter's permitted input range under normal operation and expected supply variation.

Isolation requirements should also be checked at system level rather than treating the converter as an isolated component in isolation from the rest of the PCB.

An Important Point for New Designs

The TEL 2-2410 may still be relevant when maintaining existing equipment or matching an established design.

For a completely new product, however, engineers should first check the current lifecycle status of the part and compare available alternatives before committing it to a new PCB.

This is particularly important for industrial products expected to remain in production for many years.

TEL 2-2410 for Existing 24V Systems

The TEL 2-2410 is best suited to applications where a 24V-class power rail needs to feed a lower-voltage circuit while maintaining electrical isolation.

Its combination of an 18V to 36V input range, 3.3V output and compact converter-module format makes it relevant to industrial control, instrumentation and interface power designs.

For replacement projects, legacy equipment and established 24V architectures, the actual electrical and mechanical requirements should be checked carefully before selecting the part.