Content last revised on January 22, 2026
NRL75-DC11S15B: 75W 1/8 Brick Isolated DC-DC Converter
The NetPower NRL75-DC11S15B is a high-density DC-DC converter engineered to simplify power architectures in 48V systems. Delivering a precisely regulated 15V output, this module streamlines system integration with its industry-standard footprint and comprehensive feature set. Its suite of onboard protections (OVP, OCP, OTP) minimizes the need for external safety circuits, simplifying your BOM and accelerating system validation. What is the input voltage range of the NRL75-DC11S15B? It accepts a wide 36V to 75V input, making it exceptionally versatile for nominal 48V bus applications.
Top Specs: 36-75V DC Input | 15V/5A Output | 91.5% Efficiency
Key Benefits:
- Accelerates design with standard 1/8 brick footprint.
- Reduces external components via integrated protections.
NRL75-DC11S15B: Core Specifications for Rapid Integration
The technical specifications of the NRL75-DC11S15B are tailored for straightforward implementation into demanding applications. All parameters listed are based on performance at a nominal 48Vdc input, full rated output load, and a 25°C ambient temperature unless otherwise noted. For detailed characteristic curves and application notes, please refer to the official datasheet.
| Parameter | Specification | Notes |
|---|---|---|
| Input Characteristics | ||
| Input Voltage Range | 36V to 75V DC | Ideal for standard 48V telecom and datacom buses. |
| Input Under-Voltage Lockout | Turn-on: 34.5V (Typ) / Turn-off: 31.5V (Typ) | Prevents operation with insufficient input voltage. |
| Output Characteristics | ||
| Output Voltage | 15V | |
| Output Current Range | 0A to 5A | |
| Line Regulation | ±0.2% (Max) | Over the full input voltage range. |
| Load Regulation | ±0.2% (Max) | From no load to full load. |
| Ripple and Noise (20MHz BW) | 120mV p-p (Typ) | |
| General & Thermal Characteristics | ||
| Efficiency | 91.5% (Typ) | At nominal input, full load. |
| Isolation Voltage | 2250V DC | Input to Output. |
| Operating Ambient Temperature | -40°C to +85°C | |
| Switching Frequency | 300 kHz (Typ) | Fixed frequency operation. |
Integrated Protections: Reducing External Circuitry
A key advantage of the NetPower NRL75-DC11S15B is its self-contained design, which incorporates multiple protection layers. This integration is crucial for designers, as it reduces the external bill of materials, saves valuable board space, and enhances overall system reliability by default. Does the NRL75-DC11S15B require external protection circuits? No, it includes integrated over-current, over-voltage, and over-temperature protection.
- Output Over-Current Protection (OCP): The module employs a "hiccup" auto-recovery mode. If the output current exceeds approximately 130% of its rated maximum, the converter will shut down and periodically attempt to restart. This prevents damage to both the converter and the downstream load during a fault condition without requiring manual intervention.
- Output Over-Voltage Protection (OVP): An internal circuit latches the converter off if the output voltage exceeds a preset limit (typically 120% of nominal), safeguarding sensitive downstream components from damaging over-voltage events.
- Over-Temperature Protection (OTP): A thermal sensor on the module's PCB monitors its temperature. If it surpasses the safe operating threshold, the converter will shut down to prevent thermal damage, automatically restarting once it has cooled to a safe level.
- Basic Insulation and Isolation: The 2250V DC isolation acts as a fundamental safety barrier. Think of it as a "safety moat" between the high-voltage input bus and the lower-voltage output circuitry, protecting both equipment and personnel. This level of isolation is a critical requirement in many telecommunications and industrial safety standards.
Evaluating Your Options: A Data-First Look at 1/8 Brick Converters
When evaluating DC-DC converters, engineers must balance efficiency, thermal performance, and features against system requirements. The NRL75-DC11S15B provides a well-rounded data profile for this analysis. The comparison below is intended to frame the decision-making process by highlighting key datasheet parameters. System designers should always validate performance within their specific application environment.
Decision Factors:
- Efficiency vs. Load: With a typical efficiency of 91.5% at full load, the NRL75-DC11S15B is designed for power-conscious systems. It's critical to analyze the efficiency curve in the datasheet to ensure performance aligns with your system's typical operating load, as this directly impacts thermal design and operating costs.
- Input Voltage Headroom: The wide 36V to 75V input range provides significant design margin for systems built on a nominal 48V bus, which can experience transients and dips. This adaptability can be compared to a universal power adapter that functions reliably even with fluctuating grid power, simplifying design for systems deployed in diverse electrical environments.
- Integrated vs. Discrete Protections: While some applications may require custom external protection circuits, the integrated OCP, OVP, and OTP of the NetPower NRL75-DC11S15B offer a tested, reliable solution that can significantly shorten development time compared to designing, testing, and qualifying a discrete protection scheme.
Meeting 48V System Demands with Modular Power Design
The industry's shift towards 48V power distribution architectures in data centers, 5G infrastructure, and advanced industrial automation is driven by the need to deliver higher power more efficiently. Transmitting power at a higher voltage reduces I²R (current-squared resistance) losses, but it necessitates robust and reliable point-of-load (PoL) conversion. The NetPower NRL75-DC11S15B directly supports this trend. By offering a standardized, high-density power block, it enables engineers to focus on system-level innovation rather than the complexities of designing custom power supplies. This modular approach, explored in resources covering high-efficiency power systems, is fundamental to achieving the rapid deployment schedules and reliability targets of modern electronics.
Deployment Scenarios: From Telecom Racks to Industrial Controls
The combination of a standard footprint, wide input range, and robust protections makes the NRL75-DC11S15B a versatile component for a variety of engineering challenges.
- Telecommunications & Networking: In equipment such as routers, switches, and base station transceivers, the module can efficiently step down the 48V bus voltage to power control logic, auxiliary rails, or interface cards. Its high isolation is critical for meeting telecommunication safety standards.
- Industrial Control Systems: The module provides a stable, isolated 15V source for powering sensors, actuators, and PLC (Programmable Logic Controller) I/O modules within noisy industrial environments. The wide input range ensures stable operation even when the main power bus fluctuates.
- Data Center Equipment: Within servers and storage arrays, the NRL75-DC11S15B can be used for distributed power architectures, providing localized, regulated power to specific subsystems, thereby improving overall system efficiency and thermal management. For space-constrained telecom systems requiring a stable 15V rail from a 48V bus, this 91.5% efficient 1/8 brick is a superior choice over larger, less integrated solutions.
Understanding the nuances of component specifications is a crucial skill, much like the process outlined in a guide to decoding datasheets. For any project, a thorough review of the component's documentation is the first step toward successful integration. Should your design require different parameters, our portfolio includes a wide range of power solutions.