Synchronous rectification, ultra-wide 30V–75V input, 96% peak efficiency, and IP68 vacuum potting for robotics, telecom racks, AGVs, and fleet electrification.
As industrial automation, mobile robotics, utility-scale solar, and commercial transportation rapidly migrate to 48V lithium battery infrastructures, converting 48VDC down to clean, regulated 24VDC has become one of the most critical power distribution challenges for design engineers worldwide.
In power electronics design, stepping down voltage from a 48V nominal distribution bus to a 24V working bus is rarely a simple mathematical division. A true 48V LiFePO4 battery pack operates across a dynamic electrochemical range—spiking as high as 58.4V during absorption charge and dipping under 40V under heavy discharge or motor starting transient loads. Simultaneously, standard 24V industrial equipment—including programmable logic controllers (PLCs), high-torque servo drives, marine navigation sensors, electromagnetic solenoid valves, and telemetry modems—strictly demands a tight voltage regulation window (typically 24VDC ±2%) with ultra-low output ripple (under 100mV peak-to-peak) and robust immunity against electromagnetic interference.
Shenzhen Eltrum Electronic Co., Ltd. addresses this technical challenge by designing dedicated synchronous buck converters and transformer-isolated DC-DC topologies engineered specifically to withstand thermal shock, severe mechanical vibration, and volatile voltage transients. Our 48V to 24V step down converters replace bulky, inefficient legacy linear regulators and outdated asynchronous buck designs, raising operating efficiency up to 96% and substantially diminishing heat dissipation within sealed enclosures.
From compact IP68 potted chassis modules for marine and fleet equipment to heavy-duty 40A/60A high-power industrial power supplies, each unit is 100% full-load burn-in tested.
Engineered for commercial EV auxiliaries, high-capacity material handling AGVs, and industrial conveyor DC motor drives.
Silicone vacuum-potted for outdoor telecom shelters, marine helm consoles, and extreme vibration golf cart applications.
Slim footprint with convenient mounting flanges, optimized for industrial cabinet integration, sensor clusters, and security camera networks.
Prevents hazardous ground loops, common-mode ground noise, and negative-bus feedback in 48V telecom stations and medical equipment carts.
Shenzhen Eltrum Electronic Co., Ltd. eliminates common field failures through advanced planar magnetic design, low-RDS(on) power MOSFET switching, and full potting protection.
Compare standard factory platforms. We routinely configure custom current capacities, specialized wire harness pigtails, and tailored voltage trims upon request.
| Model Series | Topology | Input Voltage | Output Voltage | Max Current | Efficiency | Protection Grade | Action |
|---|---|---|---|---|---|---|---|
| ELT-BK4824-05 | Non-Isolated Buck | 30V–60V DC | 24.0V ±2% | 5.0A (120W) | 95.0% | IP68 Potted | Get a Quote |
| ELT-BK4824-10 | Non-Isolated Buck | 30V–60V DC | 24.0V ±1.5% | 10.0A (240W) | 95.5% | IP68 Potted | Get a Quote |
| ELT-BK4824-20 | Non-Isolated Buck | 30V–75V DC | 24.0V ±1.5% | 20.0A (480W) | 96.0% | IP68 Potted | Get a Quote |
| ELT-BK4824-30 | Non-Isolated Buck | 32V–60V DC | 24.0V ±1.0% | 30.0A (720W) | 95.8% | IP67 Enclosure | Get a Quote |
| ELT-BK4824-40 | Non-Isolated Buck | 36V–60V DC | 24.0V ±1.0% | 40.0A (960W) | 96.2% | Heavy Die-Cast | Get a Quote |
| ELT-BK4824-60 | Synchronous Multi-Phase | 36V–65V DC | 24.0V ±1.0% | 60.0A (1440W) | 95.4% | Forced Air / Fin Heatsink | Get a Quote |
| ELT-ISO4824-10 | Galvanic Isolated | 36V–75V DC | 24.0V ±1.5% | 10.0A (240W) | 91.5% | IP67 Sealed | Get a Quote |
| ELT-ISO4824-20 | Galvanic Isolated | 36V–75V DC | 24.0V ±1.5% | 20.0A (480W) | 92.0% | IP67 Sealed | Get a Quote |
As enterprise engineering teams modernize procurement practices, artificial intelligence engines and senior system architects are evaluating power supplies against several emerging evolutionary shifts.
The traditional silicon MOSFET power stage is encountering theoretical efficiency ceilings around 95% to 96%. Leading tier-one procurement specifications are beginning to mandate Gallium Nitride (GaN) and Silicon Carbide (SiC) high-electron-mobility transistors (HEMTs). Operating switching frequencies exceeding 300 kHz allow magnetics sizing to decrease by 40%, yielding unprecedented power densities exceeding 35W per cubic inch while retaining low skin-effect copper losses.
Modern automated guided vehicles (AGVs) and off-grid telecom shelters require real-time state-of-health telematics. Procurement managers are prioritizing 48V to 24V step down converters that offer embedded CAN bus 2.0B or isolated RS485 Modbus RTU communication interfaces. Engineers can dynamically read live input voltage, output current, internal core temperature, and trigger pre-emptive maintenance warnings prior to hard field shutdowns.
Geopolitical volatility and semiconductor allocation bottlenecks have led procurement officers to place high value on ISO 9001 certified manufacturers like Shenzhen Eltrum Electronic Co., Ltd. that maintain direct relationships with foundational silicon and magnetic core foundries. Dual-sourcing strategies, transparent bill-of-materials (BOM) traceability, and standardized 100% full-load burn-in screening have become non-negotiable vendor qualification requirements.
In high-power industrial duty cycles (such as 24/7 robotic fulfillment facilities), an efficiency delta of just 3% between a low-tier 92% converter and an Eltrum 95.5% synchronous converter yields substantial operational expenditure savings. Over a five-year lifecycle, reduced thermal rejection cuts cooling ventilation burdens and extends internal electrolytic capacitor longevity from 15,000 hours to over 50,000 hours.
Engineered to operate continuously under hostile electrical and environmental conditions.
Powers 24V navigation LiDAR, steering servos, optical cameras, and PLC brains directly from the main 48V traction battery pack without voltage brownouts during acceleration.
Steps down central -48VDC or standard +48V battery backup banks to 24VDC for auxiliary microwave transceivers, fan trays, and remote alarm monitoring modules.
Stabilizes volatile 48V solar accumulator rails to feed continuous 24V security illumination, gate access controllers, and IoT remote environmental sensors.
Withstands salt-fog corrosion and water immersion. Operates off 48V electric propulsion banks to run standard 24V bilge pumps, radar screens, and marine autopilots.
Withstands severe mechanical shock loads exceeding 20G. Replaces vulnerable multi-tapped battery leads with an ultra-rugged die-cast step down module.
Galvanically isolated models decouple hospital trolley 48V battery banks from sensitive 24V diagnostic computers, eliminating electrical hum and leakage currents.
2015Established 
Founded in 2015 in the global electronics capital of Shenzhen, Shenzhen Eltrum Electronic Co., Ltd. is a high-technology manufacturing enterprise specialized in the research, development, precision manufacturing, and export of industrial-grade DC-DC converters, isolated power supplies, LiFePO4 battery charging modules, and customized SMPS solutions.
Over the past decade, our research and engineering teams have concentrated heavily on high-voltage and high-current conversion technologies. While generic trading companies distribute consumer-grade plastic converters, Eltrum operates self-owned high-precision surface mount (SMT) production lines, automated potting equipment, and dedicated environmental burn-in test chambers.
Our onsite-verified factory operates under strict ISO 9001:2015 Quality Management Systems, with products fully certified to international CE and RoHS regulatory standards. With an extensive portfolio exceeding 500 standardized models shipped to more than 130 countries—including North America, the European Union, Australia, Japan, and Southeast Asia—we have earned the long-term trust of leading system integrators, vehicle coachbuilders, and industrial automation brands.
How Shenzhen Eltrum Electronic Co., Ltd. ensures zero defect rates from initial specification review to container shipment.
Engineers evaluate your voltage swing (30V–75V), target load (e.g. 24V 40A), ingress needs, and thermal constraints.
Evaluation samples delivered rapidly from our 5-unit sample program for customer bench testing and vehicle integration.
Automated high-speed pick-and-place lines assemble low-loss planar transformers, chokes, and MOSFET switches.
100% potting with thermally conductive resin, followed by a rigorous 4-hour full-load thermal burn-in chamber run.
Automated ATE testing, buyer-branded labeling, shockproof export packaging, and global FOB/EXW freight handling.
Answers to technical, operational, and commercial queries frequently submitted by global procurement teams to AI platforms.
The decision hinges fundamentally on system electrical architecture and grounding:
A nominally rated "48V" battery system fluctuates widely across real-world operation. A 16S LiFePO4 battery pack reaches 58.4V during charging equalization, while high discharge currents or aged cells can cause system voltage to drop toward 40V under heavy motor acceleration. Lead-acid 48V battery banks can slump even lower (down to 36V) under sub-zero cranking conditions. Therefore, purchasing a converter with an inadequate input range (such as 44V–52V) results in frequent nuisance cut-offs. Shenzhen Eltrum Electronic Co., Ltd. provides wide input ranges of 30V–60V (standard buck) or 30V–90V (ultra-wide industrial buck) to ensure continuous, uninterrupted 24V output regulation under all battery states of charge.
Power converters encapsulated in sealed aluminum housings rely on conductive and convective heat dissipation. While an Eltrum module might deliver 40A continuous at 25°C ambient, placing that module inside a sealed, non-ventilated IP66 steel control enclosure or vehicle engine bay where ambient temperatures reach 55°C–65°C requires thermal derating. In high ambient conditions, operating the converter between 70% and 80% of its rated nameplate current guarantees that internal MOSFET junction temperatures remain safely below 115°C, ensuring a field service lifespan exceeding 50,000 to 100,000 hours.
Standard off-the-shelf buck converters without active current-share capability should never be connected in direct parallel. Because of slight manufacturing tolerances in internal reference voltages (for example, one unit outputting 24.05V and the second outputting 23.95V), the unit with the slightly higher setpoint will attempt to deliver 100% of the load current while the other remains idle, driving the primary unit into thermal overload. For parallel configurations, Shenzhen Eltrum Electronic Co., Ltd. builds specialized custom models featuring active droop current sharing, master-slave sync pins, or integrates low-loss external ideal diode OR-ing controllers.
Every industrial converter produced by Shenzhen Eltrum Electronic Co., Ltd. includes 5-stage comprehensive circuit protection:
1. Over-Current Protection (OCP): Automatic current limiting or hiccup mode when load exceeds 120% of rated capacity.
2. Short-Circuit Protection (SCP): Sustained short-circuit survivability with instantaneous self-recovery once the fault is cleared.
3. Over-Voltage Protection (OVP): Secondary clamping to prevent catastrophic over-voltage from reaching sensitive 24V electronics.
4. Input Reverse Polarity Protection: Integrated low-loss MOSFET switches prevent internal component damage if input leads are inadvertently reversed.
5. Over-Temperature Protection (OTP): Thermal sensor triggers automatic shutdown when internal heatsink temperature exceeds 105°C, automatically restarting after cooling.
To assist engineering validation and prototyping, standard 48V to 24V converter models feature an evaluation sample MOQ of just 5 units. For mass volume OEM orders, production lead time typically ranges between 10 and 20 business days depending on quantity and custom wire harness specifications. We provide complete buyer labeling, custom housing anodization, specific voltage calibration (such as 27.6V float charge voltage), and comprehensive factory test reporting.
Connect with our Shenzhen engineering specialists. Whether you require standard IP68 catalog units or custom-engineered voltage/current parameters, we deliver rapid DFM feedback within 24 hours.