Standard & Custom Isolated Power Modules Ready for Spanish Integrators
Engineered to eliminate dangerous ground potential shifts, suppress high-voltage transients, and maintain clean operating rails in rigorous industrial, marine, and telecommunication deployments.
18–75V to 24V 5A Isolated Converter
- Input Range: 18–75V DC (Wide 4:1)
- Regulated Output: 24V DC ±1% (5A)
- Dielectric Withstand: 1500V DC / 1 min
- Compliance: CE, RoHS, EN 62368-1
36–75V to 24V 5A Telecom Module
- Input Range: 36–75V DC (-48V Bus)
- Regulated Output: 24V DC • 120W
- Efficiency: Up to 92% Synchronous
- Protection: OVP, OCP, SCP, Thermal
18–90V to 12V 10A Waterproof Module
- Input Range: 18–90V DC (5:1 Ultra)
- Regulated Output: 12V DC ±1.5% (10A)
- Enclosure Rating: IP68 Full Epoxy Potting
- Grounding: Fully Isolated Input/Output
48V/60V to 12V 10A Isolated Supply
- Input Range: 36–75V DC Nominal
- Output Power: 120W Continuous
- Ripple & Noise: < 50mVp-p Low Noise
- Operating Temp: -40°C to +85°C
18–75V to 5V 20A 100W Isolated Unit
- Input Range: 18–75V (24V/48V Banks)
- Regulated Output: 5.0V DC (20A Rail)
- Isolation Barrier: Optocoupler + Transformer
- Chassis: Extruded Aluminum Heat Sink
24V to 5V 20A Marine Isolated Rail
- Input Range: 18–36V DC Standard
- Target Applications: Sonar, GPS, PLC Busses
- Galvanic Isolation: Zero Ground Loops
- Corrosion Proof: Anodized Anti-Oxidation Shell
1500W Stabilizer with RS485 Bus
- Input Range: 10–60V DC Wide
- Programmable Out: 12V, 24V, 28V, 48V Options
- Digital Comms: RS485 Modbus Telemetry
- Cooling: Integrated Thermal Sink
Smart 36V 13A Isolated DC Charger
- Input Voltage: DC 12V Alternator/Pack
- Precision Charge: DC 43.8V CC/CV (13A)
- Chemistry Profile: LiFePO4 / Li-ion Multi-stage
- Rating: IP67 Waterproof Sealed
Galvanic Isolation Fundamentals: Mitigating High Common-Mode Noise & Circulating Ground Loops
A comprehensive design guide for Spanish electrical engineers, OEM equipment developers, and renewable energy infrastructure architects evaluating isolated switch-mode topologies.
In mission-critical industrial electronics, telecommunications, and high-capacity battery storage, utilizing a non-isolated DC-DC converter can inadvertently introduce severe risks: high-energy ground loops, common-mode noise transfer, and fatal destructive transients across connected subsystems. An isolated power supply utilizes a high-frequency magnetic transformer and optical isolation feedback to physically and electrically separate the primary circuit from the secondary circuit.
For original equipment manufacturers (OEMs) and systems integrators operating in Spain and across the European Union, galvanic isolation is not merely a theoretical performance optimization; it is a primary design mandate governed by stringent harmonized standards, including UNE-EN 62368-1 (Audio/video, information and communication technology equipment safety) and UNE-EN 61000-6-2 / 6-4 (EMC immunity and emission for industrial environments). When deploying high-voltage DC arrays in Andalusia or heavy industrial motor controllers in the Basque Country, potential shifts between distant earth grounds can reach hundreds of volts. Without true galvanic barrier protection, this differential triggers catastrophic gate-driver blowouts, communication corruption across CAN/RS485 trunks, and human safety hazards.
Topological Mechanics: Forward, Flyback, and Push-Pull in Eltrum Isolated Architecture
Eltrum’s proprietary isolated DC-DC modules implement optimized transformer-coupled topologies configured for wide-range fluctuating inputs. Depending on the target power rating (from 50W compact sensor feeds to 1500W bus supplies), our engineering team utilizes synchronous rectification flyback architectures for compact modules and forward/half-bridge resonant architectures for high-amperage industrial regulators:
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Precision Magnetic Core Winding: Custom high-permeability ferrite cores with reinforced triple-insulated winding wire (TIW) ensure high creepage and clearance distances exceeding 6.5mm, conforming to Class II insulation requirements.
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Optical Fast-Loop Feedback: High-bandwidth optocouplers isolate the regulation control loop from output fluctuations, maintaining dynamic load stability within ±1% even when line input changes abruptly from 18V up to 75V.
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Zero Ground Coupling: Input return (VIN-) and output return (VOUT-) share no conductive pathways, completely shielding sensitive microprocessors, PLCs, and medical transducers from battery switching transients and traction motor back-EMF spikes.
Isolated vs. Non-Isolated Converters: Engineering Selection Matrix
To assist Spanish procurement and technical leads in determining exact bill-of-materials (BOM) selections, the table below highlights architectural trade-offs between isolated and non-isolated topologies:
| Design Parameter | Eltrum Galvanic Isolated Series | Standard Non-Isolated Buck/Boost | System Design Consequence |
|---|---|---|---|
| Ground Potential Separation | Complete Galvanic Isolation (Up to 1500VDC) | Common Negative Ground Bridge | Isolated models prevent chassis currents and ground loop noise in distributed sensor arrays. |
| Common-Mode Noise Rejection | Exceptional (> 60dB CMRR via shielding) | Passes directly through common ground | Essential for precision telemetry in high-EMI PV inverter fields. |
| Primary Failure Mode | Open Circuit; Output protected from primary punch | MOSFET short can expose load to raw VIN | Critical for protecting downstream 5V/12V logic against high-voltage traction pack short-circuits. |
| Polarity Flexibility | Floating Output (can generate -48V, -12V, or inverted rails) | Fixed ground reference only | Allows flexible telecommunication positive-ground installations. |
| Typical Conversion Efficiency | 88% – 93% with Synchronous Secondary | 93% – 97% direct inductor path | Slight trade-off in thermal overhead in exchange for total system immunity. |
Where Eltrum Isolated Converters Power Spanish Industry
From utility-scale solar farms in Extremadura to smart automotive factories around Barcelona and naval facilities in Galicia, our power conversion modules are adapted to regional operational parameters.
Solar PV Plant Trackers & String Monitoring in Southern Spain
Utility-scale photovoltaic installations in Andalusia, Extremadura, and Castilla-La Mancha experience intense ambient solar irradiation, surface temperatures surpassing 60°C, and lightning surge vulnerability across vast ground beds. Eltrum isolated DC-DC converters step down fluctuating string-battery bus voltages (36–75V or 18–90V) to clean, isolated 24V/12V rails. These feed motor drives for dual-axis solar trackers, pyranometers, and SCADA remote telemetry units (RTUs), ensuring zero ground potential coupling between tracker stations separated by kilometers.
Key Hubs: Seville, Badajoz, AlbaceteAutomotive & Industrial Robotics in Catalonia & Basque Country
The industrial manufacturing heartlands of Martorell, Zaragoza, and Bilbao rely on dense automated assembly corridors. High-frequency robotic welders and variable-frequency AC drives produce extreme harmonic EMI and switching transients on the main 24V/48V factory distribution lines. Eltrum’s galvanic isolated modules provide pristine, transformer-isolated 5V and 12V power to sensitive PLC I/O modules, optical LiDAR scanners, and vision inspection systems, completely insulating sensitive control silicon from high-power factory inductive kickback.
Key Hubs: Barcelona, Bilbao, VitoriaIntralogistics AGVs & Autonomous Forklifts in Central Hubs
Madrid’s rapid expansion as Southern Europe’s e-commerce and logistics capital (Getafe, San Fernando de Henares, Illescas) has accelerated automated guided vehicle (AGV) deployments. Utilizing 48V or 72V LiFePO4 traction packs, these vehicles undergo massive current surges during acceleration and regenerative braking. Eltrum's 48V-to-12V and 72V-to-24V isolated supplies break the traction battery ground from the navigation computer and safety sensor arrays, preventing battery float voltages from frying onboard electronics.
Key Hubs: Madrid, Guadalajara, ToledoMarine Navigation & Port Electrification on Northern & Mediterranean Coasts
Operating in corrosive saltwater environments from Vigo and A Coruña down to Valencia and Algeciras, naval electronics and port automated cranes face severe galvanic corrosion if common grounds leak even minute currents to vessel hulls. Eltrum’s fully potted, waterproof (IP68) isolated converters provide floating 12V and 24V power for navigation radar, AIS transponders, sonar sounders, and deck lighting, guaranteeing strict zero-conductivity isolation from the vessel chassis.
Key Hubs: Vigo, Cadiz, Valencia, CartagenaRailway Auxiliary Power for Spanish Rolling Stock & ADIF Corridors
Supplying high-reliability rolling stock integrators and signaling cabinets along ADIF rail lines. Our wide-input isolated converters handle severe supply dips and overvoltage surges characteristic of 72V, 96V, and 110V railway auxiliary batteries. They furnish stabilized, galvanically isolated power to driver cab displays, passenger Wi-Fi gateways, and trackside interlocking sensors in conformity with shock, vibration, and thermal railway profiles.
Key Hubs: Madrid, Zaragoza, Valladolid5G Telecom Base Stations & Rural Repeater Stations
Spain’s mountainous rural interior requires thousands of autonomous telecom towers powered by hybrid solar-diesel-battery setups operating on standard -48V positive-ground configurations. Eltrum isolated DC-DC modules convert raw -48V bus power into clean, negative-referenced or positive-referenced 12V/24V power without risking direct chassis shorts, empowering telecom contractors (Cellnex, Telefónica ecosystems) to bridge disparate radio systems seamlessly.
Key Hubs: Nationwide Tower Sites & Data HubsKey Macro Trends Reshaping Power Supply Procurement in Spain
Strategic market factors driving Spanish technical engineering teams to transition from standard step-down regulators to ruggedized, custom-engineered isolated topologies.
PERTE ERHA & Decarbonization Funding
Under Spain's Strategic Projects for Economic Recovery and Transformation (PERTE) focused on Renewable Energy, Renewable Hydrogen, and Storage, domestic clean-tech manufacturers are scaling utility BESS (Battery Energy Storage Systems) and electrolyzer testbeds. These high-voltage systems (up to 1000VDC strings) mandate auxiliary isolated DC-DC converters to step down high DC voltages safely to power local battery management systems (BMS), thermal solenoid valves, and safety interlocks.
Elevated Ambient Thermal Resilience (+85°C)
Record-breaking summer temperatures across Southern and Central Spain have caused high failure rates in standard commercial power supplies mounted in uncooled outdoor IP66 enclosures. Spanish system integrators are actively transitioning toward high-grade aluminum extruded modules filled with thermally conductive silicon/epoxy potting, engineered to maintain full operational load up to +60°C without derating and survivability up to +85°C.
Consolidation of 48V and 72V Power Architectures
In both light electric vehicles (LEVs) and intralogistics material handling, Spanish OEMs are shifting away from traditional 12V and 24V lead-acid configurations toward 48V, 60V, and 72V LiFePO4 battery platforms. This architectural elevation necessitates robust isolated buck converters capable of tolerating voltage surges up to 90VDC while generating pristine 12V rails for cabin air conditioners, lighting, and CAN bus control clusters.
Shenzhen Engineering Precision Serving Spanish Tier-1 Partners
Established in 2015, Shenzhen Eltrum Electronic Co., Ltd. operates an onsite-verified 3,000 m² production facility dedicated to advanced switch-mode power topologies. With an active portfolio exceeding 500 standard models shipped across more than 130 countries, we maintain high-velocity manufacturing pipelines tailored to European supply chain agility.
While many power suppliers act merely as third-party trading entities, Eltrum controls the entire engineering lifecycle: high-speed surface-mount technology (SMT) lines, custom toroidal transformer winding, vacuum potting encapsulation, and rigorous 100% full-load thermal burn-in testing. For Spanish technical directors seeking rapid prototyping, we offer a low validation MOQ starting at just 5 units, followed by tailored OEM/ODM mass production with buyer-label packaging and custom voltage profiles.
Frequently Asked Questions by Spanish Engineering Buyers
Straightforward technical and commercial answers addressing certification, import tariffs, customs clearance, and electrical integration across Spain.
How do Eltrum isolated power supplies comply with European and Spanish safety standards (CE, UNE-EN)?
What is the typical shipping lead time and import procedure for delivery into Spain (Madrid, Barcelona, Valencia)?
Why should an engineer select an isolated DC-DC converter over a non-isolated converter for a 48V telecom or solar installation?
Can Eltrum customize voltage setpoints, connector harnesses, and thermal housings for Spanish OEMs?
How do Eltrum isolated power supplies handle severe thermal dissipation in outdoor Spanish conditions?
What are the accepted payment methods and commercial terms for Spanish business entities?
Ready to Engineer Your Isolated Power Architecture?
Whether you require standard 18–75V industrial isolated modules for Madrid automation corridors or high-power waterproof chargers for Andalusian renewable projects, our technical engineering team delivers validated specifications within 24 hours.