A5030UB3 - AxxxxU_3 Series

Series: AxxxxU_3      Obsolete: 2009-02-01 Questions? Contact Littelfuse Support
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This balanced protector is a surface mount alternative to the modified TO-220 package. Based on a six-pin surface mount SOIC package, it uses Littelfuse's patented "Y" (US Patent 4,905,119) configuration. It is available in surge current ratings up to 500A.

SIDACtor devices are used to enable equipment to meet various regulatory requirements including GR 1089, ITU K.20, K.21, and K.45, IEC 60950, UL 60950, and TIA-968 (formerly known as FCC Part 68).


  • All measurements are made at an ambient temperature of 25 °C. IPP applies to -40 °C through +85 °C temperature range.
  • IPP is a repetitive surge rating and is guaranteed for the life of the product.
  • Listed SIDACtor devices are bi-directional. All electrical parameters and surge ratings apply to forward and reverse polarities.
  • VDRM is measured at IDRM.
  • VS is measured at 100 V/μs.
  • Special voltage (VS and VDRM) and holding current (IH) requirements are available upon request.
  • Off-state capacitance (CO) is measured between Pins 1-3 and 1-4 at 1 MHz with a 2 V bias and is a typical value for “UA”, “UB”, and “UC” products.
  • Device is designed to meet balance requirements of GTS 8700 and GR 974. 
Property (Mouseover for details) Value
Max Capacitance Tip to Ring (pF) 40
Min Capacitance Tip to Ring (pF) 25
di/dt @ 110°C (A/μs) 500
IDRM @ VDRM (μA) 5
Holding Current (mA) 150
Iscurr 800
Package Size MS-013
Regulatory Requirements GR1089 Intra-Building
GR1089 Inter-Building (Series Resistance Needed)
ITU K.20
ITU K.20 Enhanced
ITU K.21 Enhanced
YD/T 993-1998 Without Primary
YD/T 993-1998 With Primary (Series Resistance Needed)
Ipp10x1000 100
Ipp10x160 200
Ipp10x560 150
Ipp10x700 200
Ipp2x10 500
Ipp5x310 200
Ipp5x320 200
Ipp8x20 400
Peak Off-State Voltage Tip to Ring (V) 270
Pins Tip to Ring 3-4
Pins Tip to Ground 3-1 3-6
Pins Ring to Ground 4-1 4-6
Switching Voltage Tip to Ring (V) 340