Newsletter-Autumn 2026
The rapid growth of generative AI, high-performance GPUs, and AI servers is driving higher demands for power efficiency and reliability in data centers. As the industry adopts 800V HVDC power architectures to improve energy efficiency, Battery Backup Units (BBUs) have become essential for ensuring uninterrupted operation during power disruptions.
Within BBU discharge circuits, resistors must withstand high voltages and high pulse energy while maintaining long-term reliability. Leveraging decades of expertise in MELF and high-surge resistor technologies, Firstohm provides high-reliability discharge resistor solutions designed for demanding AI data center power systems.
Technical Insights
Why Are BBU Discharge Resistors So Important?
In BBU power systems, the DC-Link capacitor may retain hazardous voltages even after system shutdown, maintenance, or fault conditions. A properly designed discharge resistor safely dissipates the stored energy, reducing the capacitor voltage to a safe level within the required timeframe.
Effective discharge resistor solutions help:
• Enhance maintenance and service safety
• Reduce risks associated with residual DC-Link voltage
• Protect power systems and sensitive electronic components
• Meet system safety and reliability requirements
• Improve the long-term stability of AI server power architectures
Because the discharge process can generate high instantaneous power and pulse energy, discharge resistors must provide more than just power-handling capability. Key performance requirements include:
• High pulse and surge withstand capability
• Low resistance drift and long-term reliability
• Efficient heat dissipation
• Compact SMT-compatible package designs for automated manufacturing
Case Study: Proven Discharge Resistor Solution for AI Data Center BBU Systems Application Overview
Firstohm's discharge resistor solution has been successfully adopted in an AI Data Center BBU system, where high reliability and robust pulse performance are essential.
Customer Requirements
• High reliability for mission-critical applications
• Superior pulse and surge energy handling capability
• Compatibility with high-voltage DC-Link architectures
• Long-term resistance stability and performance
Actual Discharge Conditions
588 V / 100 μF / 1.5 Seconds
Under these discharge conditions, the resistor must withstand substantial instantaneous power and pulse energy. This places stringent demands on surge tolerance, thermal stability, and long-term reliability, making resistor selection a key factor in overall system safety and performance.
Firstohm's Recommended Solution
SRM301 High-Surge MELF Resistor
For this AI Data Center BBU application, Firstohm recommends the SRM301 High-Surge MELF Resistor. By adopting a 2-series, 2-parallel configuration, the solution effectively distributes the voltage, power, and thermal stress during the discharge process, enhancing overall surge-handling capability and system reliability.
Key benefits include:
- • Excellent pulse and surge withstand capability
- • Reliable operation in high-voltage DC-Link circuits
- • Improved thermal management and heat dissipation
- • Enhanced long-term stability and reliability
- • Compact SMT design for automated assembly
This solution has been successfully deployed in AI Data Center BBU systems, demonstrating reliable performance under demanding discharge conditions.
Performance Validation
Field testing conducted under actual customer application conditions demonstrated the excellent resistance stability of the SRM301 High-Surge MELF Resistor in BBU discharge circuits.
Test Conditions
• Charge/Discharge Cycles: 1,000 cycles
• Test Result: PASS
• Resistance Change After Test: ΔR = 0.035%
Test Results
After 1,000 charge and discharge cycles, the SRM301 maintained exceptionally stable resistance performance, with a resistance change of only 0.035%. The results confirm its ability to withstand repetitive pulse loads while delivering excellent long-term stability and reliability.
This validation demonstrates that the SRM301 is a highly suitable solution for BBU DC-Link discharge circuits, where repeated pulse energy, system reliability, and operational safety are critical requirements.
From AI Data Centers to High-Reliability Power Systems
The rapid growth of AI data centers is driving the transition toward higher voltages, greater power density, and improved energy efficiency. From 800V HVDC architectures and BBU systems to DC-Link, pre-charge, and discharge circuits, resistors may be small components, but they play a critical role in system safety, energy management, and overall reliability.
At Firstohm, we continue to advance our expertise in MELF, Power MELF, and Surge Resistant Resistor technologies to help customers meet the demanding requirements of next-generation applications. Our solutions are designed to support the growing need for high-reliability resistors in AI data centers, energy storage systems, electric vehicles, and high-power power supply applications.
Partner with Firstohm for Reliable Power Solutions
With proven performance in demanding BBU discharge applications, Firstohm delivers resistor solutions engineered for high voltage, high pulse energy, and long-term reliability, enabling safer and more efficient power systems for the AI era.
Firstohm in Action
Meet Firstohm at electronica 2026 in MunichMeet Firstohm at electronica 2026 in Munich
Discover our latest high-reliability resistor solutions for AI data centers and advanced power applications. We look forward to welcoming you at electronica 2026, Munich, Germany.
★ Nov. 10–13, 2026: electronica 2026, Munich, Germany
Location： Messe München, Germany
Booth Number：Hall A6 / Booth 514
Building More Reliable High-Performance Power Systems with Firstohm
If you have any questions regarding 800V BBU discharge applications or the SRM Series, please contact your local sales representative or reach us through the channels below:
📧 Email: qrc@firstohm.com
🌐 Website: www.firstohm.com
At Firstohm, we are committed to delivering high-reliability resistor solutions that support the next generation of AI data centers and advanced power systems.
Thank you for your continued support of Firstohm.
- Download
- Related Products
-
Vehicle Grade Surge Resistant MELF Resistor (3W 2K ohm 5%)
SRM301J2K00TKZTR2K0
Vehicle Grade Surge Resistant MELF Resistor 3W 2K ohm 5% is designed by thin film technology with superior anti-surge capability, benefits from MELF packages...
Details Add to List
Vehicle Grade Surge Resistant MELF Resistor (3W 510 ohm 5%)
SRM301J510RTKZTR2K0
Vehicle Grade Surge Resistant MELF Resistor 3W 510 ohm 5% is designed by thin film technology with superior anti-surge capability, benefits from MELF packages...
Details Add to List
