Field-proven MIL-COTS DC-DC converters engineered to meet MIL-STD-704, MIL-STD-1275, and MIL-STD-461. High-density brick modules delivering thermal endurance, extreme shock resistance, and long-term program availability for defense primes and aerospace OEMs worldwide.
Modern defense programs require rapid deployment without sacrificing uncompromising reliability. Powerstax bridges the gap between high-cost, long-lead fully custom military power supplies and standard industrial converters. Operating since 1992, our UK-based engineering team designs, manufactures, and tests MIL-COTS DC-DC converters tailored for armored ground vehicles, airborne radar, naval command systems, and tactical communication arrays.
Proven deployment in defense platforms worldwide. Powerstax supports legacy military contracts with long-term component availability, anti-counterfeit protection, and full traceability under ISO 9001 quality management.
Every MIL-COTS converter undergoes rigorous in-house thermal simulation, environmental burn-in, HALT/HASS screening, and pre-compliance testing for MIL-STD-461 electromagnetic compatibility.
Built-in protection against severe electrical environments: handling 100V 50ms transients (MIL-STD-1275), 28V/270V aircraft bus surges (MIL-STD-704), and harsh mechanical shock and vibration (MIL-STD-810).
Optimized for Size, Weight, Power, and Cost. Our engineering team modifies standard MIL-COTS platforms with custom mechanical packaging, conformal coating, cold-plate thermal interfaces, and integrated filtering.
Designed for rugged conduction-cooled environments, Powerstax MIL-COTS DC-DC converters feature planar transformer topologies, zero-voltage switching (ZVS), high power density, and extensive fault protection.
High-density quarter, half, and full-brick DC-DC converters featuring 9-36VDC and 18-75VDC input windows, up to 92% efficiency, and integrated baseplate cooling.
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Active surge protection modules designed to front-end MIL-COTS converters, clamping 100V spikes and reverse polarity events under MIL-STD-1275D/E.
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Regulated DC-DC outputs from 3.3VDC to 56VDC with single/dual outputs, current sharing capability, and N+1 redundant operation for mission avionics.
→Need a custom enclosure, multi-channel output assembly, or integrated MIL-STD-461 EMI filtering? Powerstax turns standard MIL-COTS bricks into complete plug-and-play defense power systems.
| Parameter / Feature | Standard Industrial COTS | Powerstax MIL-COTS Converters | Full Custom MIL-Spec Power |
|---|---|---|---|
| Baseplate Operating Temp | -40°C to +85°C | -55°C to +100°C (Baseplate) | -55°C to +125°C |
| Input Voltage Ranges | Narrow (2:1 or 4:1 standard) | Ultra-Wide (9-36V, 18-75V, 180-400VDC) | Platform Specific |
| Transient Compliance | External Protection Required | MIL-STD-1275E / MIL-STD-704F Ready | Fully Integrated |
| EMI Standard Compliance | CISPR 32 / EN 55032 | MIL-STD-461G (CE102, RE102) with Filters | Built-in Proprietary Filters |
| Lead Time & NRE Cost | Off-the-shelf / Zero NRE | Fast Lead Time / Zero to Minimal NRE | 52+ Weeks Lead Time / High NRE |
| Encapsulation & Ruggedization | Standard Plastic / Open Frame | Thermally Conductive Encapsulation (MIL-STD-810) | Hermetic / Specialized Resin |
| Procurement Readiness | Standard Inquiry | Get a Quote | Custom RFP Required |
Navigating defense procurement requires a granular understanding of military power standards. When deploying military electronics in tactical vehicles, naval vessels, or aircraft, power supplies must withstand unpredictable input line anomalies without degradation of performance or premature failure.
Military ground vehicles—such as armored personnel carriers, tactical trucks, and mobile command stations—experience extreme electrical disturbances caused by heavy inductive load switching, engine starting surges (cranking dropouts), and alternator load dumps. MIL-STD-1275E mandates that 28V DC powered equipment must tolerate:
Powerstax MIL-COTS DC-DC converters achieve compliance when combined with our active transient suppression modules (TVS Series). Unlike passive MOV solutions that degrade over time, our active clamping topologies absorb excess voltage energy, maintaining a steady DC bus to downstream sensitive defense payloads.
Airborne environments present strict power quality metrics for both 28V DC low-voltage systems and 270V DC high-voltage architectures. MIL-STD-704F defines acceptable limits for power spikes, phase imbalance, frequency variations, and voltage transients on fixed-wing aircraft, rotary platforms, and unmanned aerial vehicles (UAVs).
Powerstax 270V nominal input MIL-COTS DC-DC converters incorporate wide-input topologies capable of operating across line variations from 160VDC to 400VDC, ensuring continuous avionics operation during generator transfer and engine throttle acceleration power swings.
Electromagnetic compatibility is non-negotiable in combat scenarios where radar detection, secure communications, and electronic warfare (EW) suites operate in close physical proximity. MIL-STD-461G specifies strict limits for Conducted Emissions (CE101, CE102) and Radiated Emissions (RE101, RE102).
High-frequency switched-mode power supplies inherently generate differential and common-mode noise. Powerstax designs complementary MIL-COTS EMI filter modules that pair directly with our DC-DC converter brick footprints. This integrated design approach ensures system compliance with CE102 and RE102 without requiring defense engineers to perform trial-and-error external filtering circuit design.
Our power engineers assist prime contractors with test plans, thermal modeling, and custom board layout optimizations.
As modern defense systems integrate artificial intelligence, high-power radar, directed energy, and autonomous robotics, the demand on power conversion topologies is evolving rapidly.
Gallium Nitride (GaN) and Silicon Carbide (SiC) semiconductors are replacing legacy silicon MOSFETs in defense power architectures. GaN switching elements enable significantly higher switching frequencies (500kHz to 2MHz+), allowing power designers to shrink passive magnetic components and capacitive banks.
Impact on Procurement: Defense OEMs can achieve up to 40% reduction in power converter volume and weight—a critical factor for UAV payload endurance and infantry soldier-wearable equipment.
Next-generation military aircraft and hybrid-electric tactical vehicles are transitioning from legacy 28V DC distribution to 270V DC high-voltage buses. High voltage distribution dramatically reduces current draw, minimizing copper wiring weight throughout the airframe.
Impact on Procurement: Surge in demand for 270V nominal input MIL-COTS DC-DC converters step-down to regulated 12V, 24V, or 48V sub-system buses for sensor payloads.
Size, Weight, Power, and Cost (SWaP-C) remains the primary design metric in modern defense contracts. Concurrently, software-defined defense platforms require real-time health monitoring of electrical sub-systems.
Impact on Procurement: Modern MIL-COTS converters now integrate PMBus digital interfaces, allowing mission computers to monitor input voltage, output current, baseplate temperature, and predict system maintenance requirements before field failure occurs.
Global defense procurement strategies are prioritizing supply chain security, anti-counterfeit component verification, and Diminishing Manufacturing Sources and Material Shortages (DMSMS) protection over non-certified low-cost alternatives.
Impact on Procurement: Partnering with established European and North American manufacturers like Powerstax ensures guaranteed component origin, transparent EOL (End of Life) notifications, and long-term program support.
Powerstax MIL-COTS DC-DC converters are deployed across air, land, sea, and electronic warfare environments worldwide.
Answering key procurement, engineering, and environmental questions regularly submitted by global defense equipment buyers and power system designers.
Commercial Off-The-Shelf (COTS) converters are designed for standard industrial environments, typically operating between 0°C and +70°C, with standard commercial component pinouts and minimal shock/vibration ruggedization.
MIL-COTS DC-DC Converters bridge the gap between commercial availability and strict defense demands. They utilize proven high-volume converter topologies, but are upgraded with extended operating temperature components (-40°C to +100°C or -55°C to +100°C baseplate), potted thermal encapsulants, baseplate conduction cooling, and design qualification against MIL-STD-704, MIL-STD-1275, and MIL-STD-810. MIL-COTS delivers 80-90% of the performance of a full custom military converter at significantly lower unit costs, zero NRE (Non-Recurring Engineering) fee structure, and vastly reduced lead times.
Full Custom MIL-Spec converters are designed from the ground up for highly specialized contracts, often requiring hermetic sealing, specialized silicon-on-insulator semiconductors, or custom mechanical form factors, incurring high NRE expenses and 52+ week development cycles.
Standard 28V DC-DC converters usually feature maximum input voltage ratings of 36V DC or 50V DC. Subjecting these units directly to a 100V surge or 250V spike causes immediate overvoltage breakdown of input capacitors and switching MOSFETs.
Powerstax handles these surges by pairing high-density brick converters with active input transient suppressor modules (TVS Series). During a 100V surge event under MIL-STD-1275, the TVS module actively clamps the voltage passed to the DC-DC converter to a safe level (e.g., 36V DC) while safely absorbing or dissipating the transient energy. For long-duration sags (engine cold cranking), our wide-input converters continue operating down to 9V or 10V DC without dropping the regulated output voltage.
Military electronics housings are frequently sealed to IP67 or NEMA 4X specs to prevent dust, moisture, and salt fog ingress, rendering fan forced-air cooling unfeasible. Therefore, MIL-COTS DC-DC converters rely on conduction cooling through an integrated aluminum baseplate.
Recommended thermal design practices include:
Yes. Many Powerstax MIL-COTS brick series feature single-wire active current sharing (or droop current sharing) and built-in ORing FET controls. This permits defense system engineers to connect multiple modules in parallel to achieve higher output power (e.g., paralleling four 500W modules for 2kW system output) or to configure an N+1 redundant architecture where the failure of one module will not disrupt the mission critical payload.
Achieving MIL-STD-461G (CE102/RE102) compliance requires controlling high-frequency common-mode and differential-mode noise. Powerstax supplies dedicated companion EMI filter modules designed to match the input characteristics of our MIL-COTS converter brick families.
In addition to modular filters, our engineering team provides layout recommendations including shield grounding techniques, PCB common-mode choke placement, and differential LC filtering strategies to ensure your completed system passes laboratory EMC qualification on the first attempt.
To eliminate infant mortality failures in mission-critical applications, Powerstax offers optional extended Environmental Stress Screening (ESS). Screening options include extended full-load thermal burn-in (e.g., 24 to 96 hours at +85°C or baseplate maximum), thermal shock cycling (-55°C to +105°C), and vibration testing aligned with MIL-STD-810 methods.
Initiating a evaluation or request for quote is straightforward. Defense procurement specialists and engineers can click the live procurement button below to connect directly with our technical sales group. Provide your input voltage window, required output voltages, power levels, ambient operating envelope, and applicable MIL standards, and our engineering team will provide product recommendation datasheets, thermal models, and formal commercial proposals.
Partner with Powerstax for proven MIL-COTS DC-DC converters, rapid prototype delivery, in-house technical support, and reliable long-term production. Speak directly with a defense power application engineer.
