Fuse Protection for Modern Battery Storage Systems
- Braemac
- Jun 11
- 1 min read
Littelfuse Energy Storage Rack Fuse Series
The Littelfuse Energy Storage Rack (ESR) fuse series is purpose-built to protect battery racks in energy storage systems, inverters, and a variety of DC applications. Available in multiple configurations, the ESR series delivers advanced protection engineered for high-performance battery systems:
The 1500 V DC square-body fuse delivers reliable performance by rapidly clearing fault currents to safeguard critical components.
The class aBat partial range fuse enables advanced short circuit protection and a low minimum breaking capacity (MBC) from 300% of its rated current up to 250 kA—it covers fault conditions that traditional partial-range fuses often miss.
The ESR fuse safely interrupts most faults in a battery storage system to avoid catastrophic failures and downtime.
Designed to support the needs of next-gen battery technologies, ESR fuses enable seamless integration with existing battery modules and allow systems to scale without circuit redesigns. By minimizing energy loss and offering high-speed fault response, the series enhances system efficiency and reliability. Optional blow-fuse indicators help reduce downtime and improve safety
ESR Fuse Key Features:
High DC interrupting rating
Low minimum breaking current
Extremely fast acting
Low watt loss
Conforms to the IEC 60269-7 battery standard
Compact NH 1XL and 3XL sizes
Optional blown-fuse indicator and external microswitch
ESR Fuse Key Applications:
Battery energy storage systems (BESSs) – Battery Protection Unit (BPU) and battery racks
Power conversion systems
DC common bus systems
Hybrid PV-BESS inverters
Want to learn more about which ESR fuse solution is right for your system?
Contact info@Braemac.com for additional information and expert support.
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