Featured High-Voltage DC-DC Converters & Industrial Chargers
Engineered in our state-of-the-art Shenzhen facility and calibrated to meet the strict EMC, EN 50155, and low-temperature durability demands of Baltic infrastructure systems.
Smart 36V Lithium Battery Charger DC 12V to DC 43.8V 13A
- Topology: DC-DC Step-Up / CC-CV
- Input Voltage: 10V – 36V DC
- Output: 43.8V @ 13A (LiFePO4)
- Ingress Rating: IP67 Waterproof Potted
1500W High-Power Buck-Boost Converter with RS485 Bus
- Topology: Synchronous Buck-Boost
- Input Range: 10V – 60V Continuous
- Output Rails: 12V / 24V / 28V / 48V
- Interface: Modbus RTU / RS485
Industrial Isolated Step-Down Converter 36-75V to 24V 5A
- Topology: Transformer Isolated Flyback
- Input: 18–36V / 36–75V DC Wide
- Output: 24V @ 5A (120W Stable)
- Protection: Ground Isolation & EMI Filter
Ultra-Wide 18-90V to 12V 10A Isolated Power Module
- Topology: Isolated Forward Converter
- Input Window: 18V – 90V DC Dynamic
- Output: 12V Regulated @ 10A
- Application: Forklifts, AGVs & Tram Rail
Heavy Transport 24V to 12V 85A/100A Step-Down Module
- Topology: Synchronous Rectification Buck
- Continuous Current: 100 Amperes (1200W)
- Input Surge: Surge suppression to 40V
- Enclosure: Extruded Fin Aluminum Heat Sink
IP66 Sealed 600W High-Efficiency LiFePO4 Charger
- AC Input: 90V – 264V Universal AC
- Charge Volts: 14.6V / 29.2V / 58.4V CC-CV
- Thermal Range: -40°C to +65°C Operational
- Design: Solid Epoxy Vibration Proof
48V to 24V 40A 1000W High Conversion Step-Down Module
- Efficiency: > 96% @ Rated Load
- Input Voltage: 35V – 60V DC Nominal
- Output: 24V Stable @ 40A
- Safety: Over-Temp, Short-Circuit, UVLO
12V to 48V 20A High-Power Waterproof Step-Up Boost Unit
- Topology: Non-Isolated Synchronous Boost
- Low Input: 9V – 16V Battery Input
- High Output: 48V Regulated @ 20A (960W)
- Sealing: Full Die-Cast Sealed Shell
Localized Application Scenarios in Daugavpils & Eastern Latvia
Daugavpils represents Latvia's second-largest city, an essential railway crossroad, and a traditional industrial powerhouse in Latgale. The operational deployment of high-voltage DC-DC converters addresses distinct geographic, environmental, and infrastructure challenges.
Daugavpils Tram & Rolling Stock Auxiliaries
The municipal tram network (Daugavpils Satiksme) and historic locomotive maintenance hubs operate overhead DC traction lines subject to extreme voltage fluctuations, inductive kicks, and heavy mechanical vibration. Our isolated 18–90V and 600V–750V DC-DC converters bridge traction power into ultra-clean 24V auxiliary lines, powering modern ticket validator gates, digital GPS dispatch equipment, LED route matrices, and driver cockpit telematics without ground loop contamination.
Baltic Sub-Zero Industrial Cold-Start & Warehousing
Winters in the Latgale continental climate zone consistently drop below -25°C. Uninsulated transit logistics centers and cold-storage distribution hubs along the A6 transit corridor require material handling equipment (electric forklifts, AGVs, stackers) that remain reliable under severe cold. Eltrum's converters feature aerospace-grade silicone potting, anti-cracking thermal expansion matching, and industrial semiconductors capable of rated startup at -40°C without core saturation or switching frequency drift.
Renewable Microgrids & Hybrid BESS Storage
Latvia's aggressive push toward energy independence has triggered commercial solar park installations throughout Augšdaugava Municipality. Our high-power buck-boost converters and bidirectional DC-DC controllers interface fluctuating 48V–96V battery banks with 12V/24V telemetry stations, DC micro-inverters, and off-grid remote cellular backhauls, eliminating brown-outs during cyclic solar dropouts and high-draw industrial pump activation.
High-Voltage Power Conversion Architecture: Topology Comparison
Selecting optimal power topologies requires evaluating input-output ratios, galvanic isolation demands, thermal dissipation boundaries, and EMC footprint. Below is an engineering comparison of our manufacturing configurations.
| Topology | Input Voltage Window | Nominal Output Rails | Efficiency | Galvanic Isolation | Primary Industrial Use in Latvia |
|---|---|---|---|---|---|
| Synchronous Buck | 24V, 48V, 72V, 80V DC | 5V, 12V, 24V Fixed / Adj | 94% – 96.5% | Non-Isolated (Common GND) | Truck 24V fleets, industrial robot actuators, sensors |
| Non-Isolated Boost | 10V – 16V, 18V – 32V DC | 24V, 36V, 48V, 60V DC | 93% – 95.8% | Non-Isolated | Stepping 12V battery banks to 48V LED and hydraulic lifters |
| Auto Buck-Boost | 8V – 40V, 10V – 60V Ultra-Wide | 12V, 13.8V, 24V, 28V DC | 91% – 94.2% | Non-Isolated | Voltage stabilization against cranking dips & solar swings |
| Isolated Flyback / Forward | 18V – 36V, 36V – 75V, 18V – 90V | 5V, 12V, 24V Regulated | 88% – 92.5% | 1500V DC Galvanic Isolation | Railway signals, telecom base towers, medical DC carts |
| CC-CV Multi-Stage Charger | 10V – 36V DC / 90–264V AC | 14.6V, 29.2V, 43.8V, 58.4V | 92% – 95.0% | Fully Isolated Optocoupler | LiFePO4 dual-battery RV, e-mobility fleet slow/fast charge |
Mitigating Low-Frequency Ripple & Thermal Derating
In high-voltage DC-DC engineering, conversion efficiency is only one parameter of long-term reliability. Our custom magnetics employ ultra-low core loss nanocrystalline transformers and planar inductors. This minimizes eddy current heating under 100kHz–300kHz switching frequencies, preserving thermal headroom even within completely enclosed, non-ventilated IP67 cast-aluminum enclosures.
Furthermore, internal military-grade metal oxide varistors (MOVs) and transient voltage suppression (TVS) diodes safeguard power switches against ISO 7637-2 vehicular load dump pulses and lightning-induced rail track inductive surges.
Industrial Modernization & Market Trends in Daugavpils
How international decarbonization goals and eastern European industrial transformation are reshaping procurement priorities for high-voltage power conversion modules.
Electrification of Municipal Transit & Heavy Utility
European Union climate targets mandate zero-emission urban fleets. Latvian municipalities are steadily upgrading diesel municipal systems to battery-electric buses and modern low-floor trams. This transition drives massive demand for high-reliability 600V-to-24V and 48V-to-12V DC-DC converters capable of powering auxiliary pneumatic brakes, safety lights, steering servos, and HVAC control electronics directly from primary traction battery packs.
Supply Chain Reshoring to Direct Chinese Wholesale
Industrial procurement teams in Latgale historically purchased through multi-tiered Western European intermediaries, inflating project budgets by 35%–50%. Today, Latvian engineers and system integrators bypass resellers, sourcing directly from verified ISO 9001 Chinese manufacturers. Direct factory wholesale provides full access to customized voltage curves, buyer-label branding, customized harness connectors, and low sample MOQs.
Strict Adherence to CE, RoHS & E-Mark Standards
Commercialization across Latvia and the broader EU single market demands absolute regulatory compliance. Sourcing converters with validated CE LVD (Low Voltage Directive), EMC standards (EN 61000-6-2, EN 61000-6-4), and hazardous substance restrictions (RoHS) is non-negotiable. Converters must demonstrate low harmonic distortion to prevent interfering with sensitive railway signaling or medical telemetry infrastructure.
Shenzhen Eltrum Electronic: Direct Source Factory Since 2015
Founded in Shenzhen, China, Shenzhen Eltrum Electronic Co., Ltd. has grown into a premier specialized manufacturer of isolated, buck, boost, and buck-boost switch-mode DC-DC converters and waterproof lithium battery chargers. Spanning modern SMT surface-mount lines, automated wave soldering facilities, and dedicated climatic burn-in chambers, our operations encompass 51–100 seasoned engineers and manufacturing specialists.
Every batch leaving our 3,000m² facility undergoes automated 100% full-load burn-in screening, high-voltage hi-pot insulation breakdown testing, and automated oscilloscope ripple analysis. Our engineering team directly supports OEM/ODM modifications, customizing voltage trims, current foldback limits, RS485 communication protocols, and custom IP68 potted chassis for European industrial buyers.
Frequently Asked Questions by Latvian Procurement Teams
Clear technical, logistical, and commercial answers for sourcing managers and electrical engineers in Daugavpils, Rēzekne, and the greater Baltic area.
How long does freight shipping take from Shenzhen to Daugavpils, Latvia?
How do Eltrum converters withstand severe Baltic sub-zero cold (-30°C)?
Why is galvanic isolation necessary in municipal tram and heavy forklift applications?
What are the minimum order quantities (MOQ) for custom voltages and OEM specifications?
Are Eltrum products fully compliant with European CE and environmental standards?
What payment and contractual trade terms (Incoterms) are supported?
Request Direct Factory Quotation & Engineering Datasheets
Whether you are engineering a municipal transport auxiliary system, sizing a lithium battery bank charger, or designing rugged industrial machinery in Daugavpils, connect directly with our power supply application engineers today.