Yes, we build that...

Modular Devices, Inc. continues new product innovation and development to supplement our comprehensive line of Proton Rad Hard 100K+® Hybrid DC-DC Converters with devices that make power component integration for space power systems engineers and satellite systems designers easier, faster and more reliable.

...Inrush Limiters


Advanced satellite power system architectures demand precise, reliable control of input current to downstream DC-DC converters with large capacitive inputs, primarily to limit the inrush peak. Complicated discrete limiting circuits can be replaced with MDI's new Hybrid Inrush Limiters offering these advantages:

Precise, repeatable, user programmable inrush current limiting
Inhibit interlock signal for controlled turn-on of downstream converters
Under-voltage lockout applies power only when within voltage limits
Ground referenced current telemetry for accurate status assessment
Dual redundant FET switches, 100K+® Proton Rad Hard design
Compact form factor self-contained hybrid package; no other parts required. Easy to implement.

Inrush limiters are sized to all popular satellite bus voltages and harmonize with MDI Proton Rad Hard 100K+® Hybrid DC-DC Converters whether used singly or in multiples. Models *3635 are available with logic level and Model *3646 with traditional mag latch control inputs.

...and Power Bus Controllers

Control and selection of dual redundant input power buses is now possible in Model *3649 "Bus Master" which simplifies satellite system electrical design by combining the features of a solid state relay, inrush current limiter and turn-on sequencer to provide all the features above plus user selection of redundant satellite power buses via logic command.

...Point of Load DC-DC Regulators


Compact radiation hardened, non-isolated, synchronous switching point of load (POL) buck regulators put power conversion exactly where it's needed: directly on-board, right at the load. Available in two inputs (12 VDC and 5 VDC) and two power levels, any variety of output voltages can be achieved to run system loads economically, efficiently and without any extra parts. Perfect for FPGAs.

...Solid State Relays

Need to switch satellite buses or system loads consistently, reliably without concern for contact arc or interrupt ratings? Select one of the new Model *3647 MDI Hybrid Solid State Relays and tailor the user programmable output ramp to whatever your requirements demand, then command it with either 3.3 V or 5 V CMOS level signals. The large internal FET heat sink integrates the thermal turn-on pulse for low stress operation. It's magnetically isolated, 100K+® Proton Rad Hard and uses no optoelectronics.

...Active Diode "OR"


Designed to complement the low voltage outputs of MDI's Proton Rad Hard 100K+® DC-DC Converters, the 53653 Active Diode "OR" offers satellite and space vehicle designers the inherent higher reliability of redundant power sources with the advantages of a rad hard, compact, board or chassis mount, very low forward volt drop, high efficiency steering device.

...MIL-STD-1275D "Ruggedized" DC-DC Converters Meet MIL-STD-461 D/E/F Conducted Emissions, Power Leads CE101, CE102

This new 3656 series of DC-DC Converter is designed for us terrestrials involved with the design and deployment of military vehicle electronics systems. They are compliant with CE101 and CE102 without any external filters, designed and built tough for high shock and vibe applications and feature rad tolerant, SEU resistant circuits.

Yes, we build that...


And we help you make the best use of it, too. Read over our extensive application notes for the products you are interested in. Check the product specification data sheets and browse the DC-DC Converter application notes. Contact us by telephone or email and we will cheerfully attend to your questions, provide design or specification assistance and even help you develop an entirely new product based upon your specific needs. Because...

Yes, we build that too.


Henry F. Striegl, Jr.
Vice President and General Manager
Modular Devices, Inc.

Eastern Component Sales