MIL-STD-1275E surge protection reference design


Design files


MIL-STD-1275E standard provides the latest characteristics for 28-V DC input power for using equipment in military vehicles. The standard characterizes three main events that occur during operation of a military vehicle, and any equipment connected to the 28-V main power supply must be protected against these three events. These events are reverse polarity, voltage spike and voltage surge. To pass these events, do not operate the protection circuit during a reverse polarity event. The output of the protection circuit should be nominal 28 V and maximum at 34 V throughout the duration of the spike and surge events. This reference design features a two-stage clamping circuit that can handle a maximum of 120-W output. By implementing a two-stage clamping circuit, the design helps reduce the overall cost of the bill of materials (BOM) and minimize the overall size.

  • Two-stage 100-V surge suppression
  • 250-V spike surge suppression
  • Reverse-input protection to -65 V
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A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDUDG1.PDF (1086 K)

Reference design overview and verified performance test data


Detailed schematic diagram for design layout and components


Complete listing of design components, reference designators, and manufacturers/part numbers


Detailed overview of design layout for component placement

TIDMAO5.ZIP (1583 K)

Files used for 3D models or 2D drawings of IC components

TIDCG87.ZIP (4205 K)

Design file that contains information on physical board layer of design PCB


PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

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Design tools & simulation

Simulation model

MIL-STD-1275 Simulation — SNVMCD6.ZIP (142 K)

Technical documentation

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Type Title Date
Design guide MIL-STD-1275E Surge Protection Reference Design PDF | HTML Jul. 29, 2022

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