ESR Series - Battery Protection Fuses

Series: ESR
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

The Littelfuse Energy Storage Rack (ESR) series of fuses is designed specifically to protect battery racks in energy storage systems, inverters, and many other dc applications. The 1500 V dc high-speed square body fuse is extremely fast-acting to respond quickly to a range of fault currents to safeguard the battery module or other devices.

This Class aBat partial range fuse has superior short circuit protection and a low minimum breaking capacity (MBC)—from 300 % or 3 times the fuse’s rated current to 250 kA—to cover a range of over currents that traditional high-speed partial range fuses do not protect against.

The ESR fuse safely interrupts most faults in a battery storage system to avoid catastrophic failures and costly shutdowns.

Features and Benefits:
  • High dc interrupting rating provides superior short-circuit protection and the ability to scale-up systems without the need to redesign the existing circuit protection, saving time and costs
  • The low minimum breaking current offers easy coordination with battery modules and reduces size and rating of dc contactors to save space and costs
  • Extremely fast acting delivers high-speed performance
  • Low watt loss maximizes efficiency by preventing energy loss and minimizing the wasted power of components
  • Conforming to the IEC60269-7 battery standard, the ESR series is specifically designed to safeguard evolving battery technologies with fuse circuit protection
  • Compact NH 1XL and 3XL sizes save space and offer design flexibility
Applications:
  • Battery energy storage systems (BESSs) – Battery Protection Unit (BPU) and battery racks
  • Power conversion systems
  • Dc common bus systems
  • Hybrid PV-BESS inverters

Product Literature

Fuses For Battery Energy Storage Systems - Technical Paper  

Access specifications, certifications, check availability and order parts below

Catalog #Amps (A)Interrupting RatingOpeningVDC (V)Case SizeStockSamplesCompare
ESR1XLDB0125125250 kA @ 1500 VdcaBat1500NH 1XLCheckOrder
ESR1XLDB0160160250 kA @ 1500 VdcaBat1500NH 1XLCheckOrder
ESR1XLDB0200200250 kA @ 1500 VdcaBat1500NH 1XLCheckOrder
ESR1XLUB0125125250 kA @ 1500 VdcaBat1500NH 1XLCheckOrder
ESR1XLUB0160160250 kA @ 1500 VdcaBat1500NH 1XLCheckOrder
ESR1XLUB0200200250 kA @ 1500 VdcaBat1500NH 1XLCheckOrder
ESR3XLDB0250250250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLDB0315315250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLDB0350350250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLDB0400400250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLDB0450450250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLDB0500500250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLDB0550550250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLDB0630630250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0250250250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0315315250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0350350250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0400400250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0450450250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0500500250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0550550250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
ESR3XLUB0630630250 kA @ 1500 VdcaBat1500NH 3XLCheckOrder
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
ESR1XLDB0125X POWR-SPEED SQB ESR 1500VDC 1XL DIN 125A RoHS No 05/04/2022 PbFree No 05/04/2022 CoC_RoHS10_ESR1XL_SERIES_125A REACH_SVHC_Declaration_ESR1XL_SERIES_125A Yes
05/04/2022		 Does not Contain
ESR1XLDB0160X POWR-SPEED SQB ESR 1500VDC 1XL DIN 160A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR1XLDB0200X POWR-SPEED SQB ESR 1500VDC 1XL DIN 200A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR1XLUB0125X POWR-SPEED SQB ESR 1500VDC 1XL BOLT 125A RoHS No 05/04/2022 PbFree No 05/04/2022 CoC_RoHS10_ESR1XL_SERIES_125A REACH_SVHC_Declaration_ESR1XL_SERIES_125A Yes
05/04/2022		 Does not Contain
ESR1XLUB0160X POWR-SPEED SQB ESR 1500VDC 1XL BOLT 160A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR1XLUB0200X POWR-SPEED SQB ESR 1500VDC 1XL BOLT 200A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLDB0250X POWR-SPEED SQB ESR 1500VDC 3XL DIN 250A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLDB0315X POWR-SPEED SQB ESR 1500VDC 3XL DIN 315A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLDB0350X POWR-SPEED SQB ESR 1500VDC 3XL DIN 350A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLDB0400X POWR-SPEED SQB ESR 1500VDC 3XL DIN 400A RoHS No 05/04/2022 PbFree No 05/04/2022 CoC_RoHS10_ESR3XLDB0400X Yes
05/04/2022
ESR3XLDB0450X POWR-SPEED SQB ESR 1500VDC 3XL DIN 450A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLDB0500X POWR-SPEED SQB ESR 1500VDC 3XL DIN 500A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLUB0250X POWR-SPEED SQB ESR 1500VDC 3XL BOLT 250A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLUB0315X POWR-SPEED SQB ESR 1500VDC 3XL BOLT 315A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLUB0350X POWR-SPEED SQB ESR 1500VDC 3XL BOLT 350A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLUB0400X POWR-SPEED SQB ESR 1500VDC 3XL BOLT 400A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLUB0450X POWR-SPEED SQB ESR 1500VDC 3XL BOLT 450A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
ESR3XLUB0500X POWR-SPEED SQB ESR 1500VDC 3XL BOLT 500A RoHS No 05/04/2022 PbFree No 05/04/2022 Yes
05/04/2022
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Catalog # Certificates
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ESR1XLDB0125 URiconCURiconCEicon
ESR1XLDB0160 URiconCURiconCEicon
ESR1XLDB0200 URiconCURiconCEicon
ESR1XLUB0125 URiconCURiconCEicon
ESR1XLUB0160 URiconCURiconCEicon
ESR1XLUB0200 URiconCURiconCEicon
ESR3XLDB0250 URiconCURiconCEicon
ESR3XLDB0315 URiconCURiconCEicon
ESR3XLDB0350 URiconCURiconCEicon
ESR3XLDB0400 URiconCURiconCEicon
ESR3XLDB0450 URiconCURiconCEicon
ESR3XLDB0500 URiconCURiconCEicon
ESR3XLDB0550 URiconCURiconCEicon
ESR3XLDB0630 URiconCURiconCEicon
ESR3XLUB0250 URiconCURiconCEicon
ESR3XLUB0315 URiconCURiconCEicon
ESR3XLUB0350 URiconCURiconCEicon
ESR3XLUB0400 URiconCURiconCEicon
ESR3XLUB0450 URiconCURiconCEicon
ESR3XLUB0500 URiconCURiconCEicon
ESR3XLUB0550 URiconCURiconCEicon
ESR3XLUB0630 URiconCURiconCEicon