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Products Power Conversion Engineering Explore our top-tier catalog models engineered for universal AC/DC conversion, regulated DC output, high isolation, and global regulatory compliance.
An authoritative technical guide for system engineers, procurement specialists, and global OEMs navigating mission-critical power conversion requirements.
Since 1961, Wall Industries, Inc. (operating out of Exeter, New Hampshire, USA) has designed and manufactured custom, modified-standard, and standard power supplies. Our engineering team utilizes proven flyback, forward, LLC resonant, and push-pull topologies to guarantee long-term stability and eliminate qualification risk.
Our engineering portfolio spans micro-watt non-isolated point-of-load regulators (0.5W) to heavy industrial AC/DC supplies up to 3,600W. Isolation voltage options range from standard 1,500VDC to extreme 8,000VDC isolation ratings suited for medical patient connectivity (2xMOPP) and high-voltage grid equipment.
Every design addresses stringent sector mandates: MIL-STD-1275 for military vehicle transients, MIL-STD-461 for EMI, EN 50155 for railway rolling stock, UL/IEC 60601-1 for medical devices, and DoE Level VI / EU CoC Tier 2 for global energy efficiency.
When specifying OEM power conversion systems for electric vehicles, heavy machinery, or aerospace ground support, selecting the right form factor, input window, and thermal management profile is critical.
| Platform Category | Power Range | Input Voltage Window | Isolation Rating | Thermal / Cooling Method | Primary Industrial / OEM Use Cases |
|---|---|---|---|---|---|
| Isolated DC/DC Converters | 0.5W – 1,500W | 5V, 12V, 24V, 48V, 110V DC (4:1 Wide) | 1.5 kVDC – 8.0 kVDC | Conduction Baseplate / Potting | EV Auxiliary Power, Rail Rolling Stock, Defense Systems |
| Non-Isolated Buck/Boost | 0.5W – 50W | 3.3V – 72V DC Point-of-Load | Non-Isolated (Common GND) | Natural Convection / Open Frame | FPGA Logic, Telematics, Sensor Networks, Cobots |
| High-Voltage Input DC/DC | 5W – 300W | 110V – 310V DC Traction Bus | 3.0 kVDC – 4.2 kVDC | Encapsulated / Aluminum Case | Energy Storage Systems (ESS), EV Charging Stacks |
| AC/DC Internal Modules | 1W – 3,600W | 85 – 264 VAC Universal Input | 3.0 kVAC – 4.0 kVAC | Internal Fan / U-Frame / Open Frame | Industrial Machinery, Medical Scanners, Automated Cabinets |
| AC/DC DIN Rail Mount | 10W – 480W | 85 – 264 VAC / 120 – 370 VDC | 3.0 kVAC Isolation | Convection Cooled Metal Case | Control Panels, Factory Automation, PLC Power Supplies |
| External Power Adapters | 2.5W – 250W | 90 – 264 VAC Desktop / Wall-Plug | Class I & Class II Double Insulation | Sealed Enclosure (IP40 - IP67) | Level VI Chargers, Portable Medical Carts, Commercial Gear |
Vehicle electrical architectures present severe operational stresses that standard off-the-shelf power adapters cannot endure. In off-highway heavy vehicles, commercial electric trucks, passenger rail transit, and military ground platforms, power supplies are continuously subjected to extreme voltage transients, mechanical vibration, thermal shock, and aggressive electromagnetic interference (EMI).
Key technical design considerations handled by our OEM engineering team include:
How global OEMs are transforming their supply chains, adopting wide bandgap semiconductors, and navigating regulatory updates.
The industry-wide transition from traditional Silicon MOSFETs to Gallium Nitride (GaN) and Silicon Carbide (SiC) power devices is accelerating. GaN switches allow higher switching frequencies (exceeding 500 kHz to 1 MHz), enabling a reduction in magnetics size by up to 40% while raising efficiency beyond 95%. For vehicle OEMs, this translates to smaller, lighter power converter modules that conserve onboard spatial footprint.
Electric commercial vehicles and industrial energy storage systems are standardizing on higher voltage buses (800V nominal) to minimize current draw, reduce copper cabling weight, and speed up charging cycles. OEM procurement managers must source high-voltage input DC/DC converters (capable of continuously stepping down 300V–1000V DC down to 12V/24V auxiliary logic) certified to strict creepage and clearance safety distances.
Developing a ground-up custom power supply often requires 12 to 18 months of qualification and high Non-Recurring Engineering (NRE) fees. Modern OEM procurement strategy heavily favors the "Modified-Standard" approach. By modifying proven, pre-qualified catalog platforms (changing output trim voltages, wiring harnesses, ruggedized potting, or connector types), OEMs achieve a tailored solution in weeks while retaining existing safety agency certifications.
Industrial capital equipment and military vehicle platforms maintain operational service lifespans of 10 to 20 years. OEMs are avoiding consumer-grade power suppliers prone to rapid component End-of-Life (EOL) notices. Partnering with dedicated manufacturers who commit to long-term production support, counterfeit parts prevention, and form-fit-function replacement guarantees peace of mind for multi-decade programs.
From initial requirement definition to full-scale production exports, our Exeter, NH engineering facility ensures absolute technical compliance.
We review your electrical (voltage, current, transient profile), mechanical envelope, thermal dissipation path, and compliance requirements (UL, MIL-STD, CE).
Our applications engineers determine whether a qualified catalog unit, a modified standard, or a fully custom topology yields the lowest unit cost and fastest time-to-market.
Rapid prototypes are built and subjected to rigorous in-house burn-in, thermal stress screening (ESS), shock/vibration testing, and preliminary EMC scan evaluation.
Once qualified, we transition to multi-year scheduled volume manufacturing, delivering certified power units directly to your global assembly plants with complete traceability.
Get immediate answers to common technical, manufacturing, and supply chain queries regarding custom vehicle and industrial power supplies.
We design and manufacture DC/DC converters ranging from 0.5 Watts to 1,500 Watts, and AC/DC power supplies from 1 Watt to 3,600 Watts. Available mechanical packages include encapsulated modules, PCB through-hole mount, chassis mount, open frame, enclosed with internal fan, U-frame, 35mm DIN rail mount, desktop power bricks, and wall-plug adapters.
A modified-standard design leverages an existing, safety-agency-approved power platform and modifies only the parameters your application specifically requires—such as output voltage fine-tuning, custom wire harnesses, specialized potting for vibration, or IP-rated enclosures. This drastically reduces qualification time, eliminates high engineering fees (NRE), and speeds up your product launch.
Depending on your end application, our products are engineered to comply with UL/IEC 60601-1 (medical 2xMOPP isolation), MIL-STD-1275 (military vehicle 28V DC input surges), MIL-STD-461 (EMC limits), EN 50155 (railway electronic equipment), ISO 7637-2 (automotive transients), and DoE Level VI / EU CoC Tier 2 high-efficiency standards.
Yes. We specialize in ruggedized designs capable of operating continuously from -55°C to +125°C. Utilizing conservative component derating, high-grade military components, heavy-duty potting materials, and conduction-cooled baseplates, our units deliver rated power without requiring external cooling fans in harsh operational environments.
Select an isolated converter if your design requires galvanic separation between input and output grounds to break ground loops, prevent high voltage spikes from damaging control logic, or satisfy medical safety regulations (patient contact). Select a non-isolated regulator when the input and output share a common ground reference and your primary goals are maximum conversion efficiency, micro-size, and lowest cost.
We understand that industrial, transit, and defense programs require long service lives. We offer multi-decade support, strict change notifications (PCN), component counterfeit mitigation policies, and direct form-fit-function replacement designs for obsolete legacy power supplies from third-party manufacturers.
Consult with our US-based engineering team today. Whether you need a standard catalog sample, a modified platform, or a ground-up vehicle power design, we provide fast technical evaluations and reliable global supply logistics.