What Modular Devices does

Modular Devices, Inc. (MDI) is a privately held U.S. manufacturer of high-reliability hybrid DC-DC converters and power electronics, headquartered in Shirley, New York. Founded in 1984, the company designs and builds radiation-hardened power conversion products for the space and military aerospace markets. Its proprietary Proton Rad Hard 100K+® technology delivers total ionizing dose capability above 100kRad with a 2:1 margin (beyond 200kRad), and the company operates an ISO 9001:2015 certified facility with in-house thick film hybrid microcircuit production capability. The firm holds 16+ registered patents covering cryogenic operation, radiation-hardened active OR circuits, wide-range converters with input surge protection, radiation-tolerant solid-state relays, and methods for implementing radiation-hardened designs using non-radiation-hardened components.

The product portfolio spans radiation-hardened DC-DC converters (12V to 120V inputs, 2W to 500W outputs), EMI filters compliant with MIL-STD-461, solid state relays (including cryogenic -195°C variants), programmable inrush limiters, Bus Master hybrid modules combining solid-state relay and sequencer functions, Active Diode OR modules for redundant power steering, Point-of-Load regulators, GaN FET-based sequenced power converters for RF amplifiers, and battery charger converters. The portfolio supports a complete satellite power subsystem ecosystem — sequencing, inrush limiting, ORing, filtering, and POL conversion — sold as both standard catalog products and custom-engineered solutions.

MDI sells through direct factory sales from its Shirley, NY headquarters supported by a network of regional U.S. sales representatives and international representatives covering more than 30 countries across North America, Europe, Asia-Pacific, Africa, and the Middle East, with Triman Industries serving as its U.S. government distributor. Named customers include NASA, Lockheed Martin, Boeing, SpaceX, Northrop Grumman, BAE Systems, Raytheon, the U.S. Air Force, U.S. Navy, U.S. Army, the European Space Agency, Roscosmos, and CERN, spanning defense primes, U.S. and allied government agencies, and scientific institutions. Revenue is generated through hardware sales; specific revenue figures are not publicly disclosed.

Name

Modular Devices

Legal name

Modular Devices, Inc.

Website

https://mdipower.com

Company type

Private

Founded year

1984

Operating status

Operating

Headcount range

11–50 employees

Short description

Modular Devices, Inc. (MDI) manufactures radiation-hardened hybrid DC-DC converters and power electronics for space, military aerospace, and nuclear instrumentation markets from its ISO 9001:2015 facility in Shirley, New York, serving NASA, U.S. and allied defense primes, and international space agencies.

Ownership category

akta.pro rank

Product category

Radiation-Hardened Power Electronics / Aerospace & Defense Power Conversion

NAICS

Capacitor, Resistor, Coil, Transformer, and Other Inductor Manufacturing (334416), Power, Distribution, and Specialty Transformer Manufacturing (335311), Relay and Industrial Control Manufacturing (335314)

SIC

Semiconductors & Related Devices (3674), Power, Distribution & Specialty Transformers (3612)

akta.pro primary industry

DC-DC Converters & Power Modules (Isolated/non-isolated, POL modules) (IMAGADAB)

akta.pro secondary industries

Power Modules (IGBT/MOSFET/SiC/GaN Modules) (HDAHAHAH), Military Power Supplies, RF/Microwave Components & Ruggedized Electronics (IMABAGAJ)

Keywords

• Radiation-hardened DC-DC converters
• Hybrid power electronics
• Space-grade power supplies
• Military aerospace converters
• Power conversion components

Headquarters

HQ city

Shirley

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Operations, Supply Chain, Technology or R&D, Marketing or Sales

Revenue model

1. DC-DC Converters and Power Electronics Hardware: Modular Devices manufactures and sells hybrid DC-DC converters, power supplies, and related power electronics components. Products include space-grade rad hard converters, military aerospace converters, EMI filters, solid state relays, inrush limiters, and EPCs for RF amplifiers. Revenue is generated through direct hardware sales with both standard off-the-shelf products and custom designed solutions.

Pricing tiers

Go-to-market motion1 record

Distribution channels4 records

Marketing channels4 records

Core offering

Modular Devices, Inc. designs and manufactures high-reliability radiation-hardened hybrid DC-DC converters and complementary power electronics — including EMI filters, solid state relays, inrush limiters, bus master modules, active diode OR modules, point-of-load regulators, battery chargers, and sequenced EPCs — for space, military aerospace, and nuclear instrumentation applications. Its flagship Proton Rad Hard 100K+ platform delivers >100kRad TID tolerance with built-in MIL-STD-461 EMI filtering in compact thick-film hybrid packages from 2W to 500W.

Product overview

Modular Devices, Inc. (MDI) is a manufacturer of high-reliability hybrid DC-DC converters and power electronics for space and military aerospace applications. The product portfolio centers on the proprietary Proton Rad Hard 100K+ technology, which includes space-grade DC-DC converters (12V to 120VDC input, 2W to 500W output) designed for satellites and spacecraft. Supporting products include military aerospace converters, EPCs (sequenced converters for RF amplifiers using GaN FETs), EMI filters meeting MIL-STD-461 standards, solid state relays (including cryogenic -195°C variants), inrush limiters, Bus Master hybrid modules, Active Diode OR modules, and Point of Load regulators. The company also offers battery charger converters and specialized products for nuclear instrumentation. MDI operates an ISO 9001:2015 certified facility with in-house thick film hybrid manufacturing capability, serving customers since 1984.

Differentiator

Problem solved

Functional benefit

Brands

• MDI: Abbreviated company name used on website for Modular Devices, Inc.

Products and services

• Space-Grade DC-DC Converters (Proton Rad Hard 100K+) Radiation-hardened hybrid DC-DC converters for space applications, based on proprietary Proton Rad Hard 100K+ technology. Available across input voltages (12V, 28V, 50V, 70V, 100V, 120V) and power levels from 2W to 500W, with variants for satellite buses, CubeSats, miniaturized satellites, and full-scale spacecraft. Designed for NASA, ESA, Roscosmos, and commercial prime contractor space programs.
• Military Aerospace DC-DC Converters High-reliability DC-DC converters for military and aerospace applications meeting MIL-STD-461 EMI and MIL-STD-1275 surge requirements. Includes standard, full-featured, and MIL-STD-461 filtered variants with input ranges from 5VDC to 270VDC and power outputs from 2.5W to 100W for military aircraft, missiles, naval systems, and ground vehicles.
• EPCs (Sequenced DC-DC Converters for RF Amplifiers) Sequenced power converters designed for FET RF amplifiers in satellite payloads, providing outputs where the negative (gate) voltage appears first and remains on last. Available as hermetic hybrid units up to 100W or as assemblies producing sequenced outputs up to a kilowatt, supporting all popular satellite bus voltages via GaN FET switches.
• EMI Filters Electromagnetic interference filters for MIL-STD-461 compliance covering CE01, CE03, CS01, CS02, CE101, and CE102 standards. Includes MOAF Multiple Output Active Filter high-current hermetic EMI filters, booster EMI filters, and surge suppressors meeting MIL-STD-1275 and DEF STAN 411.
• Solid State Relays (SSRs) Radiation-hardened solid state relays for space and military applications, available from 3A to 25A current ratings in Form A, B, and C packages. Includes cryogenic SSRs rated for -195°C operation and voltage ratings from 50V to 1000V, with optional GaN technology variants.
• Inrush Limiters Programmable and mag-latch inrush current limiters for satellite power systems, controlling input current to downstream DC-DC converters with large capacitive inputs. Features include dual redundant FET switches, under-voltage lockout, and ground-referenced current telemetry.
• Bus Master Hybrid Module Model x3649 Bus Master hybrid module combining solid state relay, inrush current limiter, and turn-on sequencer functions. Provides power bus control and logic-command selection of dual redundant input power buses for satellite system electrical design simplification.
• Active Diode OR Hybrid Module Model 53653 Active Diode OR module providing redundant power source steering for low voltage outputs of Proton Rad Hard 100K+ DC-DC converters. Compact, rad-hard, low forward voltage drop design for efficient power redundancy in satellite systems.
• Point of Load (POL) DC-DC Regulators Radiation-hardened, non-isolated, synchronous switching point-of-load buck regulators (models 5080, 5082, 5085, 5087) at 5VDC and 12VDC inputs. Designed for direct onboard power conversion at the load, ideal for FPGAs and other sensitive electronics in space and military systems.
• Battery Charger DC-DC Converters Models 53904 and 53905 battery charger DC-DC converters providing controlled charging for space and high-reliability battery systems, at 40W and 100W power levels respectively.
• Hybrid Booster DC-DC Converter (3439 Family) Hybrid booster DC-DC converter (model 3439) providing voltage step-up functionality from lower input sources to higher output voltages for space and military applications.

Quantifiable outcome

• Power density up to 40 W/in³ for standard DC-DC converters up to 80W
• +2 more outcomes

Named customers12 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature5 records

Scale indicators2 records

Recent moves6 records

Expansion highlights5 records

Regional players

• Astronics Corporation: Astronics' Aerospace segment supplies aircraft power conversion, battery systems, and avionics power electronics to defense and commercial aerospace customers. Less focused on rad-hard converters but competes in adjacent military aerospace power conditioning markets.

Broad incumbents

• STMicroelectronics: STMicroelectronics produces rad-hard power MOSFETs, IGBTs, and integrated power modules for space applications under its Space industry program. Competes indirectly with MDI through semiconductor-level offerings that prime contractors may substitute for hybrid converter approaches.
• Microchip Technology (Microsemi): Microchip Technology acquired Microsemi, a long-standing supplier of radiation-hardened and radiation-tolerant power components, semiconductors, and DC-DC converters for space and defense. Direct competitor in rad-hard hybrid DC-DC converters with a much broader product catalog and significant space-grade technology IP.
• Crane Aerospace & Electronics: Crane Aerospace & Electronics (a division of Crane Co.) is a much larger, broad incumbent supplying ruggedized power conversion, including DC-DC converters and power electronics, for military and commercial aerospace platforms. Overlaps with MDI on military aerospace converter business but Crane serves a much broader portfolio.
• Infineon Technologies (International Rectifier): Infineon's HiRel business (formerly International Rectifier) supplies rad-hard and rad-tolerant power MOSFETs, IGBTs, and integrated power modules used in space and military DC-DC converters. As a semiconductor supplier, Infineon competes with MDI's discrete hybrid designs on next-gen rad-hard power architectures.
• Curtiss-Wright Defense Solutions: Curtiss-Wright's Defense Solutions segment supplies ruggedized COTS and custom power conversion products for military aerospace and naval platforms. Competes with MDI in defense-grade DC-DC converter applications and shares military customer relationships.
• Teledyne Technologies (Teledyne e2v / Defensive Electronics): Teledyne's space and defense electronics divisions produce radiation-hardened power solutions, sensors, and semiconductor components used in spacecraft. Competes with MDI in select space-grade power programs and shares customer overlap (NASA, ESA, prime contractors).
• Renesas Electronics (Intersil): Renesas (which acquired Intersil) supplies radiation-hardened and radiation-tolerant power management ICs and integrated point-of-load converters for space applications. Direct overlap with MDI's POL and DC-DC converter products, particularly for FPGA and digital payload power designs.

Direct peers

• Vicor Corporation: Vicor manufactures high-density DC-DC converters and power modules for defense, aerospace, and industrial applications. While not exclusively rad-hard, Vicor competes with MDI on high-power-density converter solutions targeting satellite and military platforms.
• VPT Rad (HEICO): VPT Rad (now part of HEICO) is a direct competitor to Modular Devices, manufacturing radiation-hardened and radiation-tolerant DC-DC converters, EMI filters, and power conditioning products for space and defense applications. Their product portfolios, customer base (NASA, DoD primes), and screening levels (space, military) closely overlap with MDI's offerings.

Market position

Strengths1 record

Weaknesses1 record

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/892161

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Modular Devices