Isolated 24VAC/DC Solid-State Relay Reference Design


Design files


This isolated, bi-directional, solid-state switch can control current flow into both AC and DC loads. Rated for 24VAC, it can switch loads up to approximately 1Arms/4Apeak.

  • 24VAC/DC solid state relay replaces mechanical relay
  • Board size is approximately 35mm x 12mm
  • Controls current flow into both AC and DC loads
  • Higher current rating possible by simply replacing FETs
Output voltage options PMP12072.1
Vin (Min) (V) 1
Vin (Max) (V) 28
Vout (Nom) (V) 24
Iout (Max) (A) 4
Output Power (W) 96
Isolated/Non-Isolated Isolated
Input Type DC
Topology Other
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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.


Test results for the reference design, including efficiency graphs, test prerequisites and more

TIDRO93.PDF (83 K)

Detailed schematic diagram for design layout and components

TIDRO94.PDF (89 K)

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

TIDRO95.PDF (45 K)

Detailed overview of design layout for component placement

TIDRO97.ZIP (11382 K)

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


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

TIDRO96.PDF (212 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

N-channel MOSFETs

CSD19538Q3A100-V, N channel NexFET™ power MOSFET, single SON 3 mm x 3 mm, 61 mOhm

Data sheet: PDF | HTML
PWM controllers

UCC28086Current mode push-pull PWM with prog. slope comp, 100µs soft start, 4.3/4.1 UVLO, -40°C to 85°C

Data sheet: PDF

Technical documentation

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Type Title Date
* Test report PMP12072 Test Results Oct. 31, 2016

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