Mission Critical Sales LLC


We are a manufacturer's representative serving a limited number of lines with factory-level product depth, mindshare, and responsiveness to our principals and customers in New England.


We have years of experience supporting Telecom, Military, Data Center, and Utility markets as well as Medical, Test, and Scientific OEMs and End Users.


We work from C-suite to staff to communicate, present and deliver the value of our products with perspicacity, alacrity, and integrity.


RF/Microwave, Power, and Test & Measurement.   COTS, modified standard, and full custom solutions to demanding requirements.


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Isolators & Circulators
Mil Spec, Ferrite, High Power

Wide range of standard and custom waveguide, coaxial, microstrip, drop-in, and hybrid configurations, from 40MHz to 40GHz. High power up to 25kW.

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Satcom, Radar and Medical

Waveguide and Coax, Combline, Interdigital and Cavity structures. From 100MHz to 50GHz. Fast delivery from stock and custom models. No NRE on standard design modifications.

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Waveguide Components
Diplexers, Combiners & Couplers

Standard and custom OMTs and magic tees, couplers, straights, bends, twistflex, feed horns, coaxial and waveguide transitions, rotary joints. Challenging specifications with little or no NRE.

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From DC to 40GHz

RF & Microwave amplifiers available from stock and quickly modified. Amplifiers are tuned for exceptional amplitude flatness as well as low noise. Octave band and broadband, high power and low noise.

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Control Components
Switches, Attenuators, Assemblies

PIN diode switches up to SP12T, solid state and relay attenuators from DC to 18GHz. Hermetic and MIL screening. Fast and competitively priced modifications and custom assemblies.

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Precision Noise Sources
From 100Hz to 110GHz

White Gaussian Noise modules. DIP, SMT, drop-in, coax or waveguide packages. Temp ranges from -55°C to +125°C. Calibrated broadband modules for BITE, high output ENR

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Waveguide Assemblies
Custom design or Build-to-Print

Combine passive filters and components for less weight, loss, and cost. Simple to complex assemblies for radar, medical and satcom markets using standard, thin wall, half height, double-ridged, flexi or flex-twist waveguide. 100MHz to 50GHz.


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High Density Converters
Board Mounted DC/DC & POL

Highest density, 1/32 to full brick isolated board mounted power modules and non-isolated POL converters. Standard and Rugged/COTS encapsulated versions. DOSA compatible, wide input.

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Power Assemblies
Box, Shelf, or Full Racks

Application specific solutions from standard or modified power modules. Plug-compatible legacy upgrades. Options include sliders, breakers, LVD, battery, and control systems.

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High Power
Up to 150kW

Benchtop bipolar to 1kW, unipolar from 5kW to 15kW, and full racks to 150kW. Local, analog or digital programmable.

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Mission Critical Power
Fully Sealed and Submersible

Sealed power modules ideal for harsh or unusual environments such as railroad/mass transit, military, marine, and industrial applications. Fault-tolerant design, eliminating single point of failure and hot swap capability.

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Embedded DC/DC Subsystems
COTS, Telecom & Industrial

Rugged and compact power systems for embedded, high-performance computing, and telecom. High density convection cooled modules in standard and custom packaging.

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Extreme Environments

Ultracapacitors up to 370F in a single D cell, to -55°C or +150°C, 1000G shock and hermetically sealed for MIL/Avionics, Pulse RADAR, actuators, energy, and industrial applications.

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AC/DC Power Supplies
Up to 3kW

Standard and modified, low profile, open frame or enclosed. UL, CE, RoHS compliant. Remotely programmable, linear, switch mode, medical and ferroresonant models.

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PXI Power Instruments
Precision 3U and 6U

High power, single and multi channel PXI User Power Supplies as well as precision DC source instrumentation. These products are offered in both PXI and GTXI formats.

Test & Measurement

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PXI Test Solutions
Boards, Systems and Solutions

Test solutions from components and systems to applications and support. High Performance FPGA, digital and analog i/o and measurement cards to full system development. MIL, Aerospace, Transportation, Manufacturing and R&D.

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Electronic Loads
1KW to 5kW

Up to 600 Volts DC and up to 800 amperes per module. Constant E, I, P, I/E, E/I. Air Cooled. Local, Remote Analog Control and USB Standard with optional GPIB and Ethernet.

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Modular Power Systems
Hot Swap, Low Profile, High Power

GPIB programmable mainframes, Rugged N+1 redundant systems, and 1U designs with distribution and control. Fan or convection cooled, keyed for reliable field replacement.

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Precision Power Instruments
Ultra Quiet, Fast, and Stable

Ultra low ripple, unipolar or bipolar transitioning between source and sink, capable of driving highly inductive or capacitive loads.

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High Voltage
Up to 2kV

Fast and ultra low noise linear programmable systems, 40W and 200W. Local or digitally controlled via GPIB.

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White Gaussian Noise Instruments
From 10MHz to 40GHz

Standard and custom noise test solutions for commercial, SATCOM, and military applications. Programmable, rugged and economical for wireless system and component signal testing and simulation.

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Force Balance Inertial Grade & Piezo

Ultra low noise, radiation resistant, and robust for industrial, military and commercial avionics, rail, and engine monitoring. Precise DC and near-DC measurements in demanding shock and wide band vibration environments.

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Sensors & Transducers
Military and Industrial

Piezoelectric vibration and pressure sensors, strain gage aircraft mainframe fatigue sensors, and precision linear variable differential transducers.

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Fiber Optic Pressure Seals
Up to 25 fibers per housing

Designed to provide a safe, convenient, reliable method of exiting fiber optic data lines through a structure while preserving the integrity of either a pressure or vacuum environment.


MCS is the exclusive New England sales representative for these industry leaders, ready to support you.

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A1 Microwave

A1 designs and manufactures filters, diplexers, waveguide assemblies, power combiners, couplers and adaptors for satcom, telecom, radar, medical and scientific markets, from 100MHz to 50GHz. In house CNC machining, turning, brazing, soldering and bending facilities, plus proprietary design and simulation software to for precise manufacturing and fast delivery.

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Amplical designs and manufactures high performance, cost-effective RF and microwave amplifiers, switches and control components up to 40GHz. Quick delivery from comprehensive catalog offerings. Complete electrical and mechanical customization available for full custom amplifiers, switches, attenuators, phase shifters, switch matrices, limiters, and multi-function assemblies.

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Aerospace, military and industrial sensors. Force balance inertial grade accelerometers & inclinometers, piezoelectric accelerometers, vibration & temperature, dynamic pressure sensors, strain gage fatigue sensors, and signal conditioning instruments.

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FastCAP Ultracapacitors

High performance, hermetically sealed Ultracapacitors using vertically aligned carbon nanotubes. Standard sizes and custom modules to -55°C and up to +150°C go where others cannot.

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Kepco designs and manufactures modular and instrument power supplies, specializing in digital and analog-controlled fast-programmable, 4-quadrant, linear and switch-mode a-c to d-c converters. Kepco solves your most challenging power supply requirements.

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Marvin Test Solutions

Marvin Test Solutions is a vertically integrated supplier of ATE applications, systems, and components for mission critical, high value electronic assemblies associated with the military-aerospace, semiconductor, medical, and transportation markets.

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NetPower Technologies

High density DC/DC board-mounted power modules and POL converters, standard and modified from 1/32 to full brick. Subsystems for COTS, embedded computing, telecom, and industrial applictions.

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Noise diodes, coaxial and waveguide noise sources, and precision noise instrumentation to 110GHz. Offering the most reliable, most advanced, and most cost effective noise products while providing unmatched, superior service for defense, aerospace, communications, test, and instrumentation.

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Sonoma Scientific

Specialty ferrite circulators and isolators, 40MHz to 40GHz. Waveguide, coax, drop-in, microstrip and hybrid. Multi-kW solutions; extremely low loss, exceptional IMD performance. Advanced ferrimagnetic, mechanical and electrical engineering for Mil, SATCOM, Medical, and Public Safety.