Solid-state relays
Eliminate moving parts with isolation to achieve higher system reliability with integrated power and signal isolation
Browse by category
Simplify your design process with our integrated solid-state relay (SSR) portfolio. Featuring both basic and reinforced isolated switches and drivers, TI's SSRs offer a total solution alternative to electro-mechanical and optical relays via industry-leading capacitive and magnetic isolation technology. TI's best-in-class SSRs convert low-power inputs into high-current gate drives for internal or external power switches (MOSFET, SiC, or IGBT). With integrated features like avalanche current protection, dual isolated comparators, and self-generated secondary bias supply, TI's SSRs achieve higher system reliability without the need for an external isolated power supply. These devices reduce both system size and cost while meeting creepage and clearance requirements.
Select by type
Isolated switch driver (external FET)
Isolated switch (internal FET)
High-voltage switch with resistor divider
Related categories
Isolation
Opto-emulators
Benefits of our solid-state relays
Higher system reliability & best-in-class isolation
Reduce the number of moving parts in your design and enable basic isolation up to 3.75 kVrms and reinforced isolation up to 5 kVrms.
Integrated power & signal isolation
Reduce your solution size and cost with our solid-state relays which integrate the power and signal transfer over an isolation barrier in a single chip.
High accuracy for improved system safety
Detect insulation faults quickly and with higher accuracy by pairing our solid-state relays with a battery monitor in 800-V battery management systems.
Technical resources
How to achieve higher-reliability isolation and a smaller solution size with solid
Why Pre-Charge Circuits Are Necessary in High Voltage Systems
Design Considerations for Large Y-Capacitor Resistive-Bridge DC Insulation Monitoring Device
Discover featured applications
Isolated switches and drivers for insulation resistance monitoring in high-voltage battery packs
Battery pack passive balancing designs often require the resolution of voltage and temperature measurement at the cell level, and accurate current sensing at the pack level.
Our integrated solid-state relays and resources help you create designs for battery disconnect units, battery control units and wired cell-supervisor circuits, enabling highly accurate monitoring and control over high-voltage battery stacks.
Featured resources
- TPSI2240-Q1 – Automotive 1200V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPSI2260-Q1 – Automotive 600V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPS4141-Q1 – Automotive 1200V configurable precision resistor divider with integrated switch
Isolated switches and drivers for onboard charging and high-voltage DC/DC conversion applications
Our solid-state relay portfolio of integrated isolated bias supplies, auxiliary power supplies, and bidirectional communication across an isolation barrier enables you to build smaller and more reliable onboard charging and DC/DC conversion systems in hybrid electric vehicles (HEVs) and electric vehicles (EVs). With both integrated and external field-effect transistors, TI's magnetic and capacitive isolation technologies allow for smarter and more integrated onboard charging (OBC) and DC/DC solutions.
Featured resources
- TIDA-010232 – AFE for insulation monitoring in high-voltage EV charging and solar energy reference design
- TIDA-01513 – Automotive High-Voltage and Isolation Leakage Measurements Reference Design
- TIDA-050059 – Overcurrent and overtemperature protection for solid-state relays reference design
- TPSI2240-Q1 – Automotive 1200V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPSI2260-Q1 – Automotive 600V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPSI3052-Q1 – Automotive reinforced isolated switch driver with integrated 15-V gate supply
Isolated switches and drivers for EV traction inverters to recapture energy in regenerative braking
Our integrated circuits and reference designs allow you to create high- and low-voltage traction inverter designs that efficiently convert DC power to alternating phases of power to drive multiphase motors.
Benefits:
- Safe and efficient control and protection of the power switch (insulated gate bipolar transistor or silicon carbide).
- Position sensing of the motor shaft (resolver replacement).
- A redundant architecture to enable implementation of the system at the highest safety level.
Featured resources
- TIDA-010232 – AFE for insulation monitoring in high-voltage EV charging and solar energy reference design
- TIDA-050058 – Zero-cross switching for solid-state relays reference design
- TIDA-050059 – Overcurrent and overtemperature protection for solid-state relays reference design
- TPSI2240-Q1 – Automotive 1200V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPSI2260-Q1 – Automotive 600V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPSI3052-Q1 – Automotive reinforced isolated switch driver with integrated 15-V gate supply
- How to achieve higher-reliability isolation and a smaller solution size with solid – Technical article
- Why Pre-Charge Circuits Are Necessary in High Voltage Systems – Application brief
Isolated switches and drivers for fast protection in high voltage battery backup units (BBU), rack and thermal management.
Our isolated switches and drivers provide strong electrical isolation with efficient switching, protecting control circuits in power distribution systems. Their compact size and built-in protection simplify designs for applications like outlet switching, power sequencing, and thermal management. These solid-state relays offer quick response times and work with standard interfaces, helping datacenter operators reliably manage power while using fewer components in tight spaces.
Featured resources
- TPSI3052 – Isolated switch driver with integrated 15-V gate supply
- TPSI3050 – Isolated switch driver with integrated 10-V gate supply
- TPSI2240-Q1 – Automotive 1200V, 50mA isolated switch with reinforced isolation and avalanche protection
Isolated switches and drivers for EV charging stations
Our integrated circuits and reference designs help you create smarter and more efficient power modules that can charge electric vehicles (EVs). Whether it is a power factor correction (PFC) stage or a DC/DC power stage design, we have the right circuits to design an efficient power module.
DC fast charging power module designs require expertise to enable accurate sensing and control of power output.
Featured resources
- TIDA-010232 – AFE for insulation monitoring in high-voltage EV charging and solar energy reference design
- TIDA-050058 – Zero-cross switching for solid-state relays reference design
- TIDA-050059 – Overcurrent and overtemperature protection for solid-state relays reference design
- TPSI2240-Q1 – Automotive 1200V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPSI2260-Q1 – Automotive 600V, 50mA isolated switch with reinforced isolation and avalanche protection
- TPSI2072-Q1 – Automotive, two-channel 600V 50mA isolated switch with 2mA avalanche rating
- Why Pre-Charge Circuits Are Necessary in High Voltage Systems – Application brief
- How solid-state relays simplify insulation monitoring designs in high-voltage applications – Technical article
Isolated switches and drivers for factory automation in PLC applications
Our solid-state relay portfolio, which includes features such as bidirectional communication, integrated isolated bias supplies and auxiliary power, can help you design safer and more efficient programmable logic controller (PLC) subsystems such as digital output modules, mixed modules, and digital input rail power-supply modules.
Featured resources
- Programmable logic control, distributed control system, programmable automation controller – Digital output module
- Programmable logic control, distributed control system, programmable automation controller – Digital input module
- Programmable logic control, distributed control system, programmable automation controller – Mixed module (analog and digital I/Os)
- Circuit breakers and interrupters – Circuit breaker (air, molded case, vacuum)
- TIDA-050058 – Zero-cross switching for solid-state relays reference design
- TIDA-050059 – Overcurrent and overtemperature protection for solid-state relays reference design
- How to design high-voltage systems with higher reliability while reducing solution – Technical article
- How to achieve higher-reliability isolation and a smaller solution size with solid – Technical article
Design & development resources
Overcurrent and overtemperature protection for solid-state relays reference design
This reference design shows how to achieve overcurrent and overtemperature protection for a solid-state relay. The reference design features the TPSI3050-Q1 5-kVRMS reinforced isolated switch driver. TPSI3050-Q1 device integrates a laminate transformer to achieve isolation while transferring signal (...)
Zero-cross switching for solid-state relays reference design
This reference design shows how to achieve zero-cross switching (ZCS) with a solid-state relay. The reference design features the TPSI3050-Q1 isolated switch driver. TPSI3050-Q1 device integrates a laminate transformer to achieve isolation while transferring signal and power to the secondary side. (...)
AFE for insulation monitoring in high-voltage EV charging and solar energy reference design
New products
Automotive 1200V, 50mA isolated switch with reinforced isolation and avalanche protection
Approx. price (USD) 1ku | 2.25
Automotive 600V, 50mA isolated switch with reinforced isolation and avalanche protection
Approx. price (USD) 1ku | 1.49