Smart 36V Lithium Battery Charger DC 12V to 43.8V 13A
- Input / Output: 12V DC / 43.8V DC
- Nominal Current: 13A Dynamic CC/CV
- Housing Seal: IP65 / Polyurethane Potting
Rolling Stock Portfolio
High-Reliability DC-DC Converters & Industrial Systems
Engineered to mitigate transient spikes, track surge phenomena, and thermal fluctuation across high-altitude transit networks.
18–75V to 24V 5A Isolated Module
- Dielectric Strength: 1500V DC Isolation
- Output Voltage: 24V DC Fixed (120W)
- Protection: OVP, OCP, OTP Recovery
24V to 12V 85A/100A Buck Converter
- Continuous Load: Up to 100A Continuous
- Topology: Synchronous Buck 96%
- Standard Meet: CE / RoHS / ISO 9001
1500W Buck-Boost Converter (RS485)
- Input Spectrum: 10V to 60V Wide Range
- Output Channels: 12V / 24V / 28V / 48V
- Telemetry: RS485 Dynamic Polling
30–90V Traction Input to 24V Module
- Input Windows: 36V / 48V / 72V Railway Rail
- Output Current: 10A to 20A Regulated
- Cooling System: Extruded Aluminum Fin
Isolated 18–90V to 12V 10A Converter
- Galvanic Barrier: Input/Output Separation
- Nominal Power: 120W Hermetic Potted
- Subsystems: CBTC Signalling & Sensor
48V to 24V 40A 1000W Auxiliary Unit
- Input Configuration: Nominal 48V DC Bus
- Output Regulation: 24V @ 40A Steady Rail
- Efficiency Profile: >95.5% at Rated Capacity
12V to 24V/48V High-Current Boost
- Configuration: 12V Step-Up to 24V/48V
- Thermal Threshold: -40°C to +85°C Ambient
- Enclosure Rating: IP68 Ingress Immersion
Alpine Operational Scenarios
Optimized for the Innsbruck & Tyrolean Rail Ecosystem
Decoupled, thermal-cycling resilient DC power distribution across light rail, funiculars, and cross-border transit corridors.
Innsbrucker Verkehrsbetriebe (IVB) Light Rail
Modern low-floor trams running across the Stubaitalbahn demand stable 24V DC auxiliary feeds from volatile 600V/750V DC catenary conversion stations. Our multi-stage buck and isolated converter architectures preserve steady DC control power for pneumatic braking, LED lighting strings, passenger information displays (PIS), and ticketing validator networks during dynamic catenary bounce.
Hungerburgbahn & Alpine Funicular Systems
Steep gradients and rapid elevation changes subject electronic enclosures to severe barometric variance and persistent condensation. Eltrum's fully potted IP67/IP68 isolated converters handle sudden sub-zero mountain cold up to the Nordkette, offering critical uninterruptible power for track-switching logic, remote telemetry links, and safety interlocks without thermal derating penalties.
Brenner Base Tunnel (BBT) Logistics & Rolling Stock
As Europe's crucial north-south railway hub advances, high-power electric locomotives traversing the Brenner axis demand maximum electromagnetic immunity. Our isolated DC-DC modules suppress aggressive conducted and radiated interference, delivering galvanic isolation thresholds capable of safeguarding high-end locomotive cab electronics from severe inductive load dumps.
Strategic Whitepaper
Next-Generation Power Topologies in Alpine Rail Modernization
Evaluating Total Cost of Ownership (TCO), High-Altitude Electrical Clearance, and Wide-Bandgap Semiconductor Advantages
The modernization of Central European rolling stock, with Innsbruck functioning as a pivotal node between the Austrian Federal Railways (ÖBB) network and cross-alpine conduits, has precipitated stringent demands on power conversion subsystems. The convergence of EN 50155 (Railway Applications - Rolling Stock Electronic Equipment) with intense Alpine temperature extremes demands transformative engineering approaches from Tier-1 and Tier-2 converter manufacturers.
Key Engineering Takeaway: Rolling stock operations operating between Innsbruck Hauptbahnhof (574m AMSL) and elevated Alpine routes exceeding 1,500m experience distinct Paschen curve characteristics. Lower ambient air pressure drastically diminishes dielectric breakdown voltages, demanding increased clearance and creepage distances in high-voltage DC-DC magnetics to avert partial discharge phenomena.
1. The Evolution of Wide-Input Bandgap Switching (SiC & GaN)
Legacy rolling stock power modules relied on silicone bipolar or traditional MOSFET topologies that exhibited escalating switching losses when handling broad European supply lines (such as nominal 24V, 48V, 72V, and 110V inputs under ±30% swings). By integrating advanced planar transformers alongside high-frequency power semiconductors, modern Chinese manufacturing hubs produce DC-DC stages exhibiting 95% to 97% thermodynamic conversion efficiency. This directly translates into miniaturized extruded housings that eliminate maintenance-heavy active cooling fans, perfectly satisfying the confined chassis of Tyrolean suburban train formations.
2. Galvanic Decoupling and Conducted Noise Suppression
In high-density electrified rail transit corridors, common ground returns inevitably introduce common-mode noise, ground loops, and high-energy transients driven by regenerative dynamic braking systems. Galvanically isolated converters break structural ground currents via high-pot shielding barriers, delivering pure, noise-free DC rails for safety-critical systems like Communications-Based Train Control (CBTC), European Train Control System (ETCS) transponders, and automated train protection units.
| Parameter / Criterion | Standard Industrial Modules | Eltrum Alpine Rail Compliant | Local Field Benefit (Innsbruck) |
|---|---|---|---|
| Operating Temperature | -20°C to +50°C (Non-Potted) | -40°C to +85°C (Hermetic Potting) | Immune to extreme alpine freeze & sudden thaw cycles |
| Input Transients | ±15% Continuous Range | Ultra-Wide 4:1 to 8:1 (EN 50155 spec) | Absorbs heavy catenary sag and pantograph bounce |
| Dielectric Isolation | 500V DC Nominal | 1500V – 3000V DC Galvanic Barrier | Precludes micro-arcing in low-pressure alpine elevations |
| Ingress & Vibration | IP20 / Standard Solder Mount | IP65 to IP68 / Shock Class B Certified | Zero degradation along high-vibration rack-rail tracks |
3. Life-Cycle Reliability (MTBF) and Low TCO
Transit procurement teams across Austria focus strictly on Life Cycle Costs (LCC). A nominal reduction in unit purchase price is quickly negated if premature electrolytic capacitor dry-out requires widespread bogie maintenance downtime. Utilizing solid aluminum electrolytic, metalized film capacitors, and void-free thermally conductive polyurethane encapsulation guarantees calculated Mean Time Between Failures (MTBF) exceeding 300,000 hours under rugged European operational profiles.
Manufacturing Authority
Why Major Integrators Partner with Shenzhen Eltrum Electronic
Combining deep R&D expertise, ISO 9001 certified batch testing, and tailored OEM customization since 2015.
500+
Standard Power Architectures
130+
Export Destinations Served
3,000m²
Dedicated Production Facility
5 Pcs
Accessible Evaluation MOQ
Galvanic Isolation Authority
Founded on proprietary high-frequency transformer design, Eltrum provides elite galvanic isolation modules engineered to eliminate signal cross-talk in rolling stock, high-voltage battery racks, telecom shelters, and industrial automation networks across demanding global environments.
Advanced Environmental Potting
Every transit-grade module undergoes high-vacuum resin potting, creating an impenetrable barrier against road salt spray, dust ingress, moisture penetration, and thermal shocks ranging from -40°C to +85°C. Unyielding resilience in the harshest Tyrolean winter conditions.
Agile OEM/ODM Customization
We configure input spans, output rails, telemetry hooks (RS485/CANbus), custom metal housings, and specific dynamic charging curves within rapid engineering sprints. Benefit from tier-one Chinese mass manufacturing scale backed by responsive technical engineering direct contact.
Procurement Intelligence
Frequently Asked Questions for Innsbruck & European Buyers
Addressing compliance, technical adaptation, and international logistics for rail transit projects.
How do Eltrum converters meet EN 50155 standards for Tyrolean rail projects?
Our industrial and transit-grade DC-DC converters are engineered to address the core operational requirements outlined in EN 50155, including wide input voltage tolerances (such as 40% to +25% nominal swings), comprehensive electrical isolation barriers (1500V–3000V DC dielectric rating), and shock/vibration tolerance according to IEC 61373. Encapsulated potting ensures protection against thermal shock and condensing humidity common in Alpine environments.
What is the lead time and delivery procedure to Innsbruck, Austria?
For standard evaluation units and pilot validation batches (MOQ starting at 5 pieces), air-freight dispatch directly from our Shenzhen facility to Innsbruck Kranebitten Airport or Vienna Central Hub typically requires 5 to 8 working days via DHL/FedEx Express. Mass-volume production orders are shipped via standard air cargo or consolidated rail-freight containers (China-Europe Railway Express) directly to Austrian logistics terminals with full export documentation (FOB/DAP/EXW terms).
Can Eltrum customize input ranges for legacy 600V or 750V DC tram networks?
Yes. In addition to our low-to-medium voltage portfolio (12V to 90V inputs), our engineering R&D team designs custom step-down conversion systems tailored to interface with intermediate DC links (from 300V up to 900V DC). We calibrate precise step-down stages that feed reliable 24V or 48V DC buses for auxiliary control cabinets and communications equipment.
How does the hermetic potting handle altitude changes above 1,000 meters?
At elevated altitudes, such as mountain funicular routes around Innsbruck, lower air density reduces convective heat transfer and lowers dielectric breakdown thresholds. Our void-free polyurethane and silicone elastomer potting completely displaces air around high-voltage components, preventing internal corona discharge while establishing direct conduction pathways to the aluminum chassis for continuous dissipation.
What CE, RoHS, and ISO certifications are provided upon delivery?
All series are manufactured under our ISO 9001 certified quality management system. Production lots conform strictly to CE (EMC Directive 2014/30/EU and LVD Directive 2014/35/EU) and RoHS environmental directives. Formal Declaration of Conformity (DoC), environmental compliance statements, and detailed factory burn-in test reports are supplied directly with your order documentation.
Accelerate Your Project
Need Custom Converter Engineering for Your Innsbruck Fleet?
Connect immediately with our Senior Power Supply Engineers to review input schematics, thermal profiles, and get evaluation samples dispatched rapidly.