Eaton’s bolt-down fuses offer
reliable overcurrent protection in
energy storage systems
Efficient and reliable energy
storage is critical in a host of
modern applications. Notably,
battery technologies have
become ubiquitous, owing
to several benefits, including
low costs, lightweight and
compactness, and low self-
discharge rates. Moreover,
batteries can store energy
produced by renewables to
reduce the demand for grid
power via peak shaving in
peak hours of energy demand.
Lithium-ion batteries, for
example, provide high-density
power, are easy to maintain,
and offer thousands of charge
cycles over a wide range
of operating temperatures.
Electric and hybrid-electric
vehicles utilize Li-ion batteries
as sole energy storage or
to augment power from
combustion engines.
The latest cell chemistries
emphasize higher power density
in smaller sizes to meet the
demand for miniaturization.
However, this increases the
likelihood of damaging fault
currents that could result in
overheating or internal short
circuits during charge. Moreover,
there is a risk of thermal
runaway causing a rapid rise in
temperature and pressure within
cells. Due to these limitations,
Li-ion battery systems require
robust circuit protection to limit
the peak voltage as well as
maximum charge and discharge
currents during operation.
Fuses are some of the most
common circuit protection
elements designed to
limit overcurrent in electronic
applications. Fuses are available
in a wide range of designs,
such as bolt-down fuses
(which are well-suited for battery
protection). To meet the needs
of high-power energy, industrial,
and automotive applications,
bolt-down fuses with
high interrupt ratings as well
as high current, high voltage
capabilities are critical. Due to
high temperatures and severe
conditions typical in higher
amperage applications, fuses
must perform reliably in a broad
range of operating temperatures.
Bolt-down fuses must also
be sufficiently lightweight
and compact for seamless
integration into the most
space-constrained and
component-dense PCBs.
Eaton Bussmann series
AMX & AMH are a family of
bolt-down fuses that provide
best-in-class power density with
nominal current ratings of
350 A and 500 A respectively.
These two product families
offer high voltage ratings of
up to 125 Vdc and ultra-high
interrupt ratings of up to 20 kA.
They are suited for overcurrent
protection in high-current
power distribution applications
and protect against damaging
fault currents due to the
latest battery technologies.
They also offer a rejection
feature to prevent lower
voltage options from being
used in place. Applications for
Eaton’s AMX and AMH fuses
include energy, industrial,
and transportation, including
mild-hybrid automotive, vehicle
power distribution, material
handling systems, aircraft
power distribution, high current
wire protection, as well as
supercapacitor and battery
systems.
www.eaton.com/circuitprotection
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of their respective owners.
Eaton
Electronics Division
1000 Eaton Boulevard
Cleveland, OH 44122
United States
Eaton.com/electronics
© 2022 Eaton
All Rights Reserved
Printed in USA
Publication No. ELX1256 BU-ELX22120
November 2022
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Use case
Eaton Bussmann AMX & AMH bolt-down fuses