Newsletter-Spring 2025
As global efforts toward renewable energy and carbon reduction policies accelerate, new energy technologies are rapidly emerging as dominant forces for the future. As a pioneer in the MELF resistor industry, Firstohm is dedicated to providing stable and reliable solutions for these cutting-edge technologies. Our MELF resistors deliver exceptional performance and durability in applications such as PV inverters, wind energy conversion, electric vehicles, and energy storage systems. In this edition, we introduce our latest technical advancements and explore how these innovations are driving the development of new energy projects, helping you seize market opportunities and embrace the future of green energy.
Electronica 2025 in ShangHai
★ April 15–17, 2025: electronica China (Shanghai)
Venue: Shanghai New International Expo Centre
Booth No.: N2-1211 (Hall N2, Booth 1211)
We sincerely invite you to visit us and explore more innovation and expertise!
★ Newly Upgraded [Download Center] Now Online!
To make it easier for customers to access information, we have fully optimized the 'Download Center' on our official website. Commonly requested items include:
• Declaration of Restricted Substances (RoHS/REACH/ /TSCA/POP/PFAS/Halogen-Free)
• Conflict Minerals Statement(CMRT/EMRT)
• Shelf Life of Unopened Products
These documents are available for immediate download. If any materials are missing, we warmly welcome your feedback!
★ Certified National Renewable Energy Certificate
Our Hualien Plant in Taiwan has adopted solar power and has been certified by the Bureau of Standards, Metrology and Inspection (BSMI) with a National Renewable Energy Certificate. Estimated annual solar power generation: 350,747 kWh, equivalent to the yearly electricity usage of approximately 100 households in Taiwan.
We continue to support energy transition and carbon neutrality through real action.
★ Discharge Resistor Applications and Solutions
In applications such as power modules, inverters, and energy storage systems, discharge resistors play a critical role in releasing residual charges from capacitors or circuits after power-off. This prevents electric shock risks and malfunction, ensuring the safety of both equipment and personnel. While the industry often uses multiple R-chip resistors in series/parallel combinations to meet power and voltage requirements, this approach has several drawbacks:
1. High component count – Takes up valuable board space
2. Complex assembly – Increases BOM and soldering steps
3. Reduced reliability – Failure of a single resistor may compromise the entire discharge function
※ Optimization Recommendation:
Use Firstohm’s SRM / SWM Series Anti-Surge MELF Resistors, key benefits:
• High power density – Compact size with strong power handling, reducing total component count
• Excellent pulse/surge tolerance – Ideal for pre-charge and discharge circuits
• High reliability – Excellent thermal stability and long-term performance
※ Real-world Success Story
Project: EV PDU (OBC Discharge Application)
Discharge Condition: 1000V → 60V within 1 second, Capacitance: 210μF
Original Setup: 20 pcs 1KΩ 1206 R-Chip resistors (5 series × 4 parallel)
Improved Setup: SWM200 2W 1KΩ × 4 pcs (2 series × 2 parallel), successfully replaced original setup
This redesign reduced component count by 80% while improving reliability and saving space.
Firstohm’s SRM / SWM series Anti-Surge resistors provide high power density and outstanding surge resistance, making them the ideal discharge resistor solution. They simplify designs, reduce costs, and improve overall system reliability - offering engineers a more optimized solution.
📞 For technical support or sample requests, please contact our Firstohm technical team.
★ September 11–13, 2024: electronica India
During electronica India, Firstohm gained valuable insights into customer needs and built closer connections with distributors from various regions. We sincerely thank everyone who visited our booth and look forward to future collaborations to expand the adoption of MELF resistors in the Indian market.
Thank you once again for taking the time to read this edition of our newsletter. If you have any questions, please feel free to contact your dedicated sales representative or reach us via our company email: qrc@Firstohm.com.tw
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What's New At Firstohm-Spring 2025
Advantages of Using MELF Resistors in Energy Discharge Applications
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