P5103ACL - Primary Protection Pxxx3AC Series

SIDACtor Primary Protection Balanced Modified TO_220 Image
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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.

The SIDACtor® Primary Protection Balanced Series Modified TO-220 are thyristor devices designed for use in primary protection applications.

The series provides a single port overvoltage solution that enables applications to comply with the balance requirements of GR-974 and GTS-8700. Please contact Littelfuse to discuss your particular application and regulatory requirements.

Features and Benefits

  • High holding current options available
  • Failsafe option available
  • Low voltage overshoot
  • Low on-state voltage
  • Does not degrade with use
  • Fails short circuit when surged in excess of ratings
  • Single-port protection
  • Modified TO-220 Package
  • Lead forms available


  • UL 497
  • ITU K.28
  • GR-947
  • GTS-8700

Property (Mouseover for details) Value
Max Capacitance Tip to Ring (pF) 40
Min Capacitance Tip to Ring (pF) 20
di/dt @ 110°C (A/μs) 500
IDRM @ VDRM (μA) 5
Holding Current (mA) 150
Iscurr 800
Partner ECAD Models P5103ACL
Regulatory Requirements GR1089 INTER BUILDING
ITU K.20
Ipp10x700 200
Ipp2x10 500
Ipp5x310 200
Ipp5x320 200
Ipp8x20 400
Peak Off-State Voltage Tip to Ring (V) 420
Pins Tip to Ring 1-3
Pins Tip to Ground 1-2
Pins Ring to Ground 3-2
Switching Voltage Tip to Ring (V) 600
Surge Rating C
Package TO-92

URicon QVGQ2_E133083

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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
P5103ACLRP SIDACtor® 3Chp 420V 500A TO220A RoHS RoHS No 11/01/2004 PbFree No 07/09/2012 Yes
P5103ACL SIDACtor® SYM 3Chp 420V 500A TO220A RoHS RoHS No 11/01/2004 PbFree No 07/09/2012 Yes
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