SRDA3.3-4BTG - SRDA3.3 Series

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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 SRDA3.3-4BTG integrates low capacitance rail-to-rail diodes with an additional zener diode to protect I/O pins against ESD and lightning induced surge events. This device can safely absorb up to 35A per IEC61000-4-5 (tp=8/20μs) without performance degradation and a minimum ±30kV ESD per IEC61000-4-2 international standard. Its low loading capacitance makes it ideal for high-speed interface protection.

Features & Benefits:

  • Lightning protection, IEC61000-4-5, 35A (8/20μs)
  • EFT, IEC61000-4-4, 50A (5/50ns)
  • ESD, IEC61000-4-2, ±30kV contact, ±30kV air
  • Low clamping voltage
  • Low leakage current
  • SOIC-8 surface mount package (JEDEC MS-012)


  • Tertiary (IC Side) Protection: T1/E1/T3/E3; HDSL/SDSL; Ethernet
  • RS232, RS485
  • Video Line Protection
  • Security Cameras
  • Storage DVRs
  • Network Equipment
  • Instrumentation, Medical Equipment

SRDA3.3-4BTG ECAD Models

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Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s) IPC-Material Declaration
SRDA3.3-4BTG 3.3V 35A Rail Clamp Array,SOIC-8L RoHS No 06/26/2013 PbFree No 06/26/2013 CoC_RoHS10_SRDA3.3-4BTG REACH205_Declaration_SRDA3.3-4BTG No
Does not Contain IPC_SRDA3.3-4BTG_IEH
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