Quiet power for avionics, HEICO’s 3D Plus DC DC converters keep jets talking

Reviewed: ad hoc news Accessory & Components desk. Edited and checked on 2026-06-18, 00:28. Details in the imprint.

3D Plus DC DC converter modules from HEICO’s 3D PLUS division are the kind of hardware you never see on a plane, yet they quietly decide whether sensors, mission computers, and radios stay alive at 35,000 feet. Packed into compact bricks, they turn messy aircraft power into the clean, stable voltage avionics crave.

What these modules actually do

In an aircraft, power rarely arrives as a tidy, laptop-like plug. Instead, 28-volt DC buses swing, spike, and dip as loads change and generators work. 3D Plus DC DC converters sit in between, turning that noisy input into tightly controlled voltages for each sensitive board.

HEICO’s 3D PLUS catalog shows dozens of DC DC converter families for aerospace and defense, with typical modules delivering isolated outputs from 5 to 50 watts and efficiency often above 80 percent. They are qualified for extreme temperature ranges and vibration levels common in military and commercial aviation cabins.

Compact, stacked, and built for harsh flight

Unlike bulky conventional power supplies, 3D PLUS leans on advanced stacking technology, effectively building a 3D circuit from thin layers to shrink footprint and height. That matters when avionics designers fight for every cubic centimeter in crowded mission racks.

The company highlights high density and radiation tolerance as core strengths, with heritage in space electronics adapted for airborne platforms. This means the same design philosophy that keeps satellites alive far above Earth now helps aircraft cope with altitude, temperature swings, and electromagnetic stress.

Use cases from business jets to fighters

These DC DC converter modules are not branded for passengers. Their customers are avionics OEMs and system integrators fitting mission computers, radar processors, and communication suites into cramped bays. Each module quietly feeds a board, often never seen again after installation.

Because 3D PLUS offers multiple input ranges, isolated outputs, and configurable pinouts, a single module family can end up in very different aircraft types. A power brick that drives a flight management system in a business jet can, with tweaks, also serve a sensor payload on a surveillance aircraft.

Reliability first, then flexibility

Designers choosing these modules do not chase the absolute last percent of efficiency. They care about proven reliability over thousands of flight hours, predictable derating curves, and massive documentation that convinces certification authorities and airframers.

3D PLUS provides detailed datasheets and environmental test reports for its DC DC converters, including vibration, shock, and thermal cycling. That documentation becomes part of the certification chain, helping integrators justify that their system will survive years of real-world operation.

How they compare in the cockpit ecosystem

Compared with generic industrial DC DC converters, HEICO’s 3D Plus modules come with tight quality controls, traceability, and aerospace-grade screening. That makes them significantly more expensive on a per-unit basis, but they are sold into systems where downtime or failure costs far more than the hardware itself.

There are competing aerospace power specialists, but 3D PLUS leverages its space background and miniaturization expertise to push higher power density at a given reliability level. For integrators, that can free enough panel space to add another function or shrink an entire box.

What matters for investors

For HEICO, 3D Plus DC DC converter modules are one piece of its Flight Support and Electronic Technologies portfolio, which focuses on specialized, high-margin components rather than commodity parts. That fits the company’s long-standing strategy of targeting narrow but durable niches in aerospace and defense.

Shares of HEICO Corp (US4228061093) trade on the NYSE in US dollars.

This article was AI-assisted and editorially reviewed. Product information without guarantee; prices and availability may change at short notice. No investment advice, no buy or sell recommendation. Stock-market transactions involve risks up to total loss.