Infineon Extends Solid State Isolator Portfolio with Compact ISSI20BxxF Family for High-Volume Industrial Automation Applications

­Infineon Technologies AG introduces the ISSI20BxxF Solid State Isolator (SSI) family, bringing solid-state isolation technology into high-volume applications traditionally served by photovoltaic isolators (PVIs), photovoltaic relays (PVRs), and electromechanical relays (EMRs). Housed in a compact PG-DSO-8 150 mil package with a footprint comparable to existing PVI solutions, the new family gives designers a direct upgrade path to SSI technology in space-constrained designs while benefiting from higher drive capability, integrated protection features and flexibility in power-switch selection. Target applications include solid-state relay modules, PLC input/output, industrial automation, laboratory DC power supplies, automated test equipment, low-voltage building automation, and telecom infrastructure.

The ISSI20BxxF family is built on Infineon's proprietary coreless-transformer technology, which transfers both signal and energy across the isolation barrier to drive external power switches without requiring a dedicated isolated gate supply. This approach delivers higher output-drive capability than conventional PVI-based solutions, enabling compatibility with a broad range of external power switches. Integrated protection functions include over-current protection, over-temperature protection, fast fault turn-off, and latch-off capability, reducing the need for external protection circuitry and improving system robustness. Selected variants additionally support dynamic Miller clamp and fast turn-on functionality for applications with more demanding switching requirements.

The family comprises three devices, the ISSI20B02F, ISSI20B03F, and ISSI20B11F, all housed in the PG-DSO-8 150 mil package. All three devices provide 3 kVrms isolation, 4 mm creepage, and UL 1577 certification, covering applications where basic isolation is appropriate under applicable safety standards. The ISSI20BxxF family complements Infineon's previously introduced ISSI20RxxH and ISSI30RxxH families, extending the SSI portfolio to designs where a smaller footprint is required. 

Compared with electromechanical relays, SSI-based solid-state relays eliminate mechanical wear, contact bounce, and arcing, enabling silent operation and long service life, characteristics that are increasingly valued in high-cycle applications.

Availability
The ISSI20B02F, ISSI20B03F, and ISSI20B11F are available now. Evaluation hardware, application notes, technical training materials, and design support resources are available. More information is available here.