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Date: 20-07-17

ESD-Clamping Diodes from STMicroelectronics meets size and performance requirements

As SOC chips gets more complex due to higher level of integration and lesser and lesser operating voltages, they become more sensitive to electrostatic discharge voltage. To protect such IC chips and circuit boards, design engineers need quickly acting ESD protection diodes, they also need to be of very small size to take care of space constrained electronics design requirements.

The new ESD clamping diodes from STMicroelectronics  are made to quickly clamp transients to a voltage as low as 7V, and handle 7A peak pulse current. The unidirectional ESDZL5-1F4 and bidirectional ESDZV5-1BF4 have a snap-back characteristic, with 5.8V trigger voltage and low dynamic resistance with package footprint dimensions of 0.58mm x 0.28mm (typical).

They feature  6pF capacitance and withstand 15kV and 18kV contact discharge respectively, both devices exceed the IEC 61000-4-2 specifications. The applications include protecting equipment such as industrial sensors, IoT devices, active cables and connectors, smart-home electronics, wearable devices like smart watches and healthcare or fitness bands, and portable products including smartphones, tablets, data loggers, and point-of-sale terminals.

The 0201 size unidirectional ESDZL5-1F4 and bidirectional ESDZV5-1BF4 are in production now, and samples are available. Pricing is from $0.014 for orders of 5000 units.


                                                                                         ESDZL5-1F4       ESDZV5-1BF4

                                                                                         Unidirectional      Bidirectional

  • Minimum trigger voltage                                              5.8V                       5.8V
  • Typical line capacitance                                              7.5pF                     6pF
  • Typical clamping voltage[1]                                     9.5V                       7V
  • ESD contact discharge (IEC 61000-4-2)                       15kV                      18kV
  • Typical package dimensions: 0.58mm x 0.28mm
  • Maximum package area: 0.18mm2

[1]  30ns after 8kV contact discharge, per IEC 61000-4-2


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