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Tunnel Diodes and Back Diodes from AMS

Product Announcement from American Microsemiconductor, Inc.

Tunnel Diodes and Back Diodes from AMS-Image


A tunnel diode is a semiconductor diode with a negative resistance region that allows very fast switching speeds, up to 30 GHz. The operation of the tunnel diode depends upon a quantum mechanic principle known as "tunneling" wherein the intrinsic voltage barrier (0.3 Volt for Germanium Diodes and 0.7 Volt for Silicon Diodes) is surmounted by high doping levels (introduced during the diffusion manufacturing process). This enhances tunneling and in turn, fast switching and low reverse breakdown voltage. 

Specifications for Tunnel Diode

  • Peak Voltage (Vp) of the tunnel diode
  • Tunnel Diode Peak Current (Ip)
  • Valley Voltage (Vv) of the tunnel diode
  • Tunnel Diode Valley Current (Iv)


A back or backward diode is a tunnel diode with a suppressed Ip and so more closely approximates a conventional diode characteristics. In a Back Diode, the Reverse Breakdown Voltage (VBR) is lower than the Forward Voltage(VF) and so the VBR voltage characteristic is used as the forward direction of the diode and the positive characteristic (VF) is used as the negative diode terminal, hence its name, back diode.

Here are few Tunnel Diodes American Microsemiconductor Supplies:

Did you Know ?

  •  American Microsemiconductor Inc. (AMS) is Certified AS9100: Rev C and ISO9001:2008
  • AMS has been supplying semiconductor for over 45 years
  • AMS has the largest semiconductor stock; over 170,000 different line items in stock
  • AMS has over 100 years of semiconductor sales experience
  • AMS sells semiconductors worldwide
  • AMS designs, re-engineers, modifies, manufactures, and tests all types of semiconductors 
  • We offer equivalents and replacements for discontinued/obsolete Semiconductors
  • If you have a sample of what you need, we will evaluate your sample
  • We have a Yahoo Semiconductor ecommerce store. Please visit us at: http://store.americanmicrosemiconductor.com
  •  AMS also  has our large inventory online at www.Amazon.com
  •  Both our stores, Yahoo and Amazon, have no minimum Purchase Order
  •  AMS accepts and delivers small manufacturing orders efficiently and on time.
  •  AMS supplies test data, if needed, on all our parts
  •  We do sorting, selection, and matching of semiconductor parameters
  •  Have a requirement, call us at 973-377-9566, Fax us at 973-377-3078,              email at sales@americanmicrosemi.com, or visit one of our stores at: http://store.americanmicrosemiconductor.com, or www.Amazon.com

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