18–75V to 24V 5A 120W Industrial Isolated Converter
- TopologyGalvanic Isolation
- Input Range18–36V / 36–75V DC
- Nominal Output24V @ 5A (120W)
- ProtectionOCP, OVP, OTP, SCP
Engineered Topologies
Featured Isolated & Industrial DC-DC Power Platforms
Select from our field-proven converter lines engineered for electrical vehicle auxiliary rails, marine house banks, commercial transport, and rugged telecom nodes.
Ultra-Wide 18–90V to 12V 10A Isolated Waterproof Module
- Input Window18–90V Dynamic
- Output Power12V @ 10A (120W)
- Sealing GradeFull Potting IP68
- Dielectric Proof1500VDC / 1 min
Telecom Grade 48V to 12V 10A Isolated Ground Converter
- Input Scope36–75V (Nominal 48V)
- Output Rail12V Regulated (120W)
- GroundingTrue Floating Ground
- EfficiencyPeak 93.5%
Industrial Isolated 18–75V to 5V 20A 100W Power Brick
- Input Compatibility24V / 36V / 48V Rails
- High Output5.0V @ 20A (100W)
- ChassisDie-cast Aluminum Shell
- Thermal Range-40°C to +85°C
1500W High-Capacity Buck-Boost Stabilizer (RS485 Enabled)
- Dynamic In10–60V Extreme
- Selectable Out12V / 24V / 28V / 48V
- Control BusRS485 Modbus Telemetry
- Power Density1500W Peak Capability
Commercial Vehicle 24V to 12V 85A–100A Step-Down Module
- Continuous Rating12V @ 100A (1200W)
- In-Vehicle UseHeavy Truck / Bus Auxiliary
- Efficiency PeakUp to 96% Synchronous
- StandardsCE / RoHS / ISO 9001
E-Mobility 30–90V (48V/72V) to 24V 20A Buck Converter
- High Voltage In30–90V DC Traction Pack
- Stabilized Out24V @ 10A / 20A
- EnclosureIP68 Sealed Waterproof
- Transient ProofLoad Dump Clamping
Smart 36V Lithium Charger: DC 12V to 43.8V 13A Waterproof
- Charging AlgorithmPrecision CC/CV Dynamic
- Target Packs36V LiFePO4 / Ternary
- ApplicationEV, Marine, RV Dual-Battery
- EnclosureEngine Bay Resistant
Technical Whitepaper
Engineering Truth: Why Galvanic Isolation Dictates System Longevity
An exhaustive engineering review on ground potential shifts, transient suppression, and selecting non-isolated vs. isolated DC-DC topologies.
1. Ground Loops, Common-Mode Noise, and Catastrophic Return Faults
In high-power direct-current deployments—including telecommunications shelters, electrified industrial material handlers (forklifts, AGVs), and maritime vessels—the electrical reference ground is neither homogeneous nor perfectly neutral. Non-isolated converters share a common negative rail between the source (e.g., a 48V or 72V traction battery) and the secondary payload (e.g., 12V flight computers, navigational sensors, or microcontrollers). When significant switching surges occur, ground bounce (ΔV = L × di/dt) creates instantaneous potential differentials across the shared return path. Without galvanic isolation, high ground return currents find unintended paths through delicate signal shields, CAN bus transceivers, and analog sensors, causing intermittent system resets, erratic sensor readings, or silicon burnout.
Optocoupler & Transformer Isolation
Our isolated converter topology integrates high-permeability toroidal transformers paired with high-speed optocouplers, establishing up to 1,500V DC galvanic clearance between primary windings and secondary stages.
Transient Clamping & EMI Immunity
Featuring two-stage LC filter networks and high-voltage TVS arrays at the front end, absorbing alternator load dump surges, inductive flyback pulses, and meeting demanding CISPR 25 Class 3 emissions targets.
Safe Floating Output Architectures
Completely severed ground connections allow system engineers to configure isolated DC outputs as positive ground, negative ground, or fully floating references without altering upstream battery topology.
2. Engineering Topology Decision Matrix
Review the operational envelope below to verify the exact topology required for your mission-critical system design:
| Conversion Topology | Voltage Relation | Ground Isolation | Typical Conversion η | Primary Industry Applications |
|---|---|---|---|---|
| Isolated Flyback / Forward | Wide (18–36V, 36–75V, 18–90V) | Yes (1.5kV–3kV DC) | 88% – 93% | Telecom DC plants, material handling, marine instruments, medical carts |
| Non-Isolated Synchronous Buck | Vin > Vout (e.g. 24V/48V → 12V) | No (Common Ground) | 94% – 97% | Commercial vehicle lighting, cabin audio, fleet dashcams, e-scooter auxiliaries |
| Synchronous Boost | Vin < Vout (e.g. 12V → 24V/48V) | No (Common Ground) | 92% – 95% | Solar pumping, high-power LED drivers, 48V winch rails from 12V vehicle banks |
| 4-Switch Buck-Boost | Vin crosses Vout (e.g. 9–40V → 12V) | No (Common Ground) | 91% – 94% | Cranking voltage stabilizers, LiFePO4 battery-to-battery charging modules |
Industry Outlook 2026–2030
Emerging Sourcing & Technology Trends in DC-DC Conversion
Strategic supply chain managers and lead hardware architects must evaluate five macro transitions driving power conversion specifications over the coming decade.
01
Wide Bandgap Semiconductor Integration (GaN & SiC)
Silicon carbide (SiC) MOSFETs and Gallium Nitride (GaN) switches are replacing silicon. By shrinking switching losses at frequencies above 300kHz, planar magnetics size drops by 45%, unlocking power densities exceeding 45W/in³ while operating cooler in tightly packed enclosures.
02
The Universal Sourcing of 18–90V Ultra-Wide Inputs
Procurement teams are shifting away from fragmented 24V-only or 48V-only SKUs toward standardized wide-input platforms. A singular 18–90V isolated platform satisfies 24V commercial fleets, 48V material transport, and 72V utility e-mobility, slashing inventory overhead and qualification times.
03
Smart Digital Telemetry: CAN bus & RS485 Integration
Dumb black-box converters are being phased out in smart fleet architectures. Modern procurement specifications demand bidirectional Modbus RS485 or SAE J1939 CAN interfaces for real-time voltage monitoring, dynamic thermal derating, and predictive lifecycle alerts prior to field downtime.
04
Thermally Conductive Polyurethane IP68 Encapsulation
Fan-cooled power modules suffer catastrophic failure in saline marine, dusty mining, and vibrating agricultural machinery. Vacuum-degassed, two-component thermally conductive resin potting eliminates condensation, withstands 10G mechanical vibration, and improves heat dispersion across the aluminum shell.
05
Nearshoring Supply Guarantees with Verified Tier-1 Plants
Global original equipment manufacturers (OEMs) are auditing sub-tier suppliers for component traceability, localized Shenzhen engineering redundancy, ISO 9001 compliance, and conflict-free mineral sourcing to guarantee multi-year product lifecycle continuity without unplanned redesigns.
Why Choose Us
Shenzhen Eltrum Electronic: Direct Source Factory Engineering
Founded in 2015, Shenzhen Eltrum Electronic Co., Ltd. has grown into China’s foremost developer and manufacturer of high-reliability DC-DC power conversion hardware, intelligent battery charging modules, and customized AC-DC platforms. Operating from our onsite-verified 3,000 m² Shenzhen facility, we blend proprietary magnetics design with high-speed automated SMT lines.
We engineer high-stress isolated converters capable of operating unassisted across harsh climates from Northern European cold storage to Middle Eastern solar installations. Our factory is fully certified to ISO 9001 quality management protocols, and every mass-produced unit complies with CE and RoHS directives.
- Agile OEM/ODM Prototyping: Custom input voltages, connector harnesses, IP68 housings, and bespoke charging profiles delivered within 10–14 days.
- 100% 4-Hour Burn-In: Every single batch undergoes thermal cycling and continuous dynamic full-load stress testing before packaging.
- Flexible Procurement Batches: Low MOQ starting from 5 units for sample qualification, scalable to 50,000 units monthly throughput.
- Direct Engineering Collaboration: Direct communication with lead power hardware engineers to resolve EMI, harmonic, and mechanical constraints.
Procurement Knowledge Base
Frequently Asked Questions by Sourcing & Engineering Teams
Authoritative answers concerning minimum orders, thermal derating, bespoke customizations, and electrical certification.
What is the definitive engineering difference between isolated and non-isolated DC-DC converters?
An isolated DC-DC converter uses a high-frequency transformer barrier to physically separate the electrical input circuits from the output circuits, resulting in no shared ohmic return path (no common ground). This prevents hazardous ground loops, protects downstream electronics from common-mode noise, allows floating outputs, and shields sensitive equipment from severe primary ground potential surges. A non-isolated converter (like a standard buck or boost) shares a direct common negative ground between input and output, which offers higher conversion efficiency (94–97%) and lower cost, but provides zero galvanic protection against high-voltage ground faults.
How should we calculate thermal derating for sealed, fanless IP68 converters in high-temperature environments?
Our converters are rated for full nominal output power at ambient temperatures up to 45°C or 50°C (depending on model) when mounted to a vertical, heat-dissipating metallic surface. In sealed enclosures without forced-air cooling or where ambient temperatures exceed 60°C, we advise derating the sustained continuous operational load by 20% to 30%. For example, an application with a continuous 10A draw in a sealed 70°C enclosure should utilize our 15A or 20A rated module to maintain junction temperatures well below the silicon threshold and maximize MTBF.
Can Eltrum modify voltage thresholds, wire harnesses, or internal algorithms for custom OEM batches?
Yes. As a direct Shenzhen manufacturer, Shenzhen Eltrum Electronic Co., Ltd. provides end-to-end OEM and ODM services. We routinely customize specific input voltage windows (e.g., custom 14–42V or 36–100V), calibrate custom continuous current limits, integrate specialized connectors (such as Anderson Powerpole, Deutsch DT series, or M12 waterproof aviation plugs), and implement unique CC/CV charging curves tailored to proprietary lithium-ion, LTO, or LiFePO4 battery management systems (BMS).
What is your typical Minimum Order Quantity (MOQ) and production lead time for standard and custom models?
For standard production models, our MOQ starts at just 5 units, allowing engineering teams to conduct rapid bench validation, thermal analysis, and field trials. High-power units (1,000W+) can be sampled from 1–2 units. Production lead times for standard catalog items are typically 5 to 7 business days. Custom OEM/ODM modified orders typically require 10 to 14 days for rapid prototyping and validation, followed by 3 to 4 weeks for volume dispatch.
What international quality standards and electrical safety certifications do your converters maintain?
All Eltrum manufacturing operations comply strictly with the ISO 9001:2015 Quality Management System. Our converter series undergo comprehensive EMC and LVD testing to achieve European Conformity (CE) marking and RoHS directive compliance. Every production batch is subjected to comprehensive incoming material inspections (IQC), in-process visual and automatic testing (IPQC), and a 100% 4-hour dynamic full-load burn-in test before shipment. Specific test reports and declaration of conformity certificates are provided upon inquiry.
How can procurement teams initiate customized RFQs, obtain official quotations, and confirm delivery terms?
You can initiate a direct inquiry by clicking the "Get a Quote" live chat button anywhere on this page, or by emailing our engineering sales group directly at [email protected]. Please include your nominal input voltage (and swing range), target output voltage, continuous current requirement, peak surge expectation, target environment (IP sealing requirements), and estimated annual volume. We accept FOB, EXW, and CIF delivery terms with international payment support via T/T, PayPal, or Escrow.
Accelerate Your Power Hardware Development
Connect immediately with our Shenzhen application engineering department. We evaluate your voltage ranges, thermal dissipation constraints, and system ground topologies to provide fully validated samples within days.