SM712 Series - 600W Asymmetrical TVS Diode Array- Qualified to AEC-Q101

Series: SM712
Availability: Not for New Designs

Contact the factory for lead times (part is still available for purchase).

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Disclaimer Notice

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.

This series is not recommended for new designs. Suggests to use SP712-02HTG for the new designs in near future. 

Littelfuse SM712 Series TVS Diode Array (SPA® Diodes) is designed to protect RS-485 applications with asymmetrical working voltages (-7V to 12V) from damage due to electrostatic discharge (ESD), electrical fast transients (EFT), and lightning-induced surges. It can absorb repetitive ESD strikes above the maximum level specified in the IEC61000-4-2 international standard without performance degradation and safely dissipate up to 19A of 8/20μs surge current (IEC-61000-4-5) with very low clamping voltages.


  • Robust surge and enhanced ESD protection: ESD, IEC61000-4-2: ±30kV (contact); EFT, IEC61000-4-2: 50A; Lightning, IEC61000-4-5: 19A; Peak pulse power: 600W
  • Asymmetrical standoff voltage matches RS-485 transceiver profile
  • Low dynamic resistance (0.5Ω TYP) offers superb clamping performance
  • Minimal capacitive loading of 75pF (MAX)
  • AEC-Q101 qualified


  • RS-485
  • Fieldbus
  • Modbus
  • Profibus
  • DMX512
  • Security Systems
  • Automated Teller Machines (ATMs)
  • Automation Equipment
  • Communication Equipment

Access specifications, certifications, check availability and order parts below

Catalog #AEC-Q101 QualifiedStandoff
ESD Contact
SizePolarityChannelsPublic part (Yes/No)Product CategoryRoHSSBU
Replaced By: SP712-02HTG
YES1220&30&301919V@ 1A I/O to GnaSOT23-3Bidirectional2YesGeneral Purpose ESD ProtectionYSBU
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