Content last revised on June 20, 2026
SV24-28-350 AcBel 24V to 28V 350W High-Efficiency DC-DC Converter Module
How do you maintain a rock-solid 28V supply for high-performance industrial equipment when your primary 24V rail is subject to significant voltage swings? For engineers designing RF power amplifiers or automated transit systems, the challenge isn't just conversion—it is doing so with enough thermal headroom to survive enclosed environments. The SV24-28-350 from AcBel provides a robust answer, delivering a regulated 28V DC output at 12.5A from a wide 18–36V DC input range. This module is specifically designed to eliminate the instability of unregulated bus voltages while maintaining a power density that fits tight PCB layouts.
UVP: High-current 12.5A density and advanced thermal dissipation for 24V-native industrial and telecom power architectures.
- Input Voltage Range: 18V to 36V DC (Nominal 24V)
- Output Power: 350W (28V @ 12.5A)
- Efficiency: Typically >90% at full load.
Engineers often ask if this converter can handle the transient voltage drops common in battery-powered motor drives. By utilizing a wide 18–36V input window, the SV24-28-350 ensures that 28V output remains steady even during heavy engine cranking or sudden load steps. For 24V-bus systems requiring high thermal margins and precise voltage regulation, this 350W module is the optimal choice.
Frequently Asked Questions
Engineering Insights for Power System Design
How does the 12.5A output current rating impact thermal management in fanless enclosures?
At a full 350W load, the SV24-28-350 generates heat equivalent to roughly 10% of its throughput (assuming 90% efficiency). In fanless designs, the low thermal resistance of the baseplate is critical. To maintain the 28V output without derating, the module must be coupled with a high-performance heatsink or a cold-plate interface. This allows the high 12.5A current to be maintained even in elevated ambient temperatures by effectively moving heat away from the internal power MOSFETs.
What is the primary benefit of the wide 18V to 36V input range compared to fixed 24V modules?
The primary benefit is system-level resilience. In many industrial applications, a "24V" rail is rarely a perfect 24V; it can drop to 18V under heavy inductive load starts or surge to 30V+ during battery charging cycles. The SV24-28-350 acts as a buffer, preventing these fluctuations from reaching sensitive 28V components like RF transmitters or precision sensors, thus enhancing overall system reliability.
Key Parameter Overview
Functional Specifications for System Integration
| Category | Parameter | Technical Value |
|---|---|---|
| Input Characteristics | Voltage Range | 18V – 36V DC |
| Nominal Voltage | 24V DC | |
| Output Characteristics | Output Voltage | 28V DC |
| Max Output Current | 12.5A | |
| Total Output Power | 350W | |
| Performance | Efficiency | Up to 91% |
| Isolation Voltage | 1500V DC (Typical) | |
| Environmental | Operating Temp | -40°C to +85°C (Baseplate) |
Technical Deep Dive
Advanced Power Conversion and Thermal Architecture
The engineering behind the SV24-28-350 focuses on minimizing switching losses through synchronous rectification and high-frequency PWM control. To visualize this, consider a high-speed highway interchange: a standard converter acts like a stop-and-go intersection, losing energy every time a car stops. The SV24-28-350 is the high-speed ramp, allowing energy to flow with minimal resistance. This efficiency is why the module can output 350W in a compact footprint.
Furthermore, the physical construction utilizes an aluminum baseplate design. In high-power modules, heat is the enemy of longevity. By providing a direct thermal path from the internal switching components to the exterior surface, the SV24-28-350 minimizes the internal temperature gradient. This is comparable to an athlete wearing moisture-wicking fabric; the faster the heat (or sweat) is moved away from the core, the longer the system (or athlete) can perform at peak intensity. For designs requiring even more power handling, engineers often look at integrating high-performance power modules like the FS450R12KE3 in the upstream AC-DC stages to ensure the DC bus remains stabilized before reaching the SV24-28-350.
Application Scenarios & Value
Optimizing Performance in Demanding Industrial Environments
The SV24-28-350 is frequently deployed in Automated Guided Vehicles (AGV) and warehouse robotics. Imagine a 24V battery-operated AGV that needs to power a 28V localized motor drive for a lifting arm. During the lift, the battery voltage might sag to 20V. Without the SV24-28-350, the lifting arm would lose torque or stall. However, the module’s 350W capability ensures that the 28V rail remains constant, allowing the AGV to complete its task despite the battery's state of charge.
In addition to mobile robotics, this converter is a staple in telecom power distribution. Remote radio heads often require a clean 28V supply to power high-frequency transistors. The SV24-28-350 provides the necessary isolation and regulation, ensuring that electromagnetic interference is minimized. For larger-scale industrial inverters that might supply the primary DC bus for these systems, modules such as the FF400R12KE3 or CM600DX-24T are often found in the primary power conversion stage. By pairing AcBel's precise DC-DC regulation with robust primary switching, designers can achieve a highly reliable power chain that meets strict IEC 61800-3 standards for industrial drives.
As a specialist distributor, we understand that power design is about more than just a datasheet; it is about system reliability. The SV24-28-350 represents a stable, high-density solution for 28V industrial applications. To discuss specific integration requirements or to request a quote for your next project, contact our technical sales team today.