ARPS1020A5 and ARPS1050A5 Radiation-Hardened Power Switch Family Extends Apogee’s Fault-Management Roadmap
Apogee Semiconductor proudly announces the ARPS1020A5 and ARPS1050A5, a radiation-hardened power switch family engineered to bring deterministic protection, fault containment, and continuous health telemetry to spacecraft and other mission-critical power architectures. With two optimized variants, the ARPS power switch family cleanly spans key spacecraft rails.
ARPS1020A5 supports standard 3.3 V, 5 V, and 12 V power rails, while ARPS1050A5 supports 28 V spacecraft buses, giving architects a consistent protection and telemetry strategy from regulated point-of-load domains through primary distribution. Designed as compact, high-side protected switches, these devices combine programmable over-current protection, short circuit protection, over-temperature protection, adjustable soft-start, state of switch reporting, and current telemetry to enable system-level fault management without compromising SWaP-C.
“With the release of ARPS1020A5 and ARPS1050A5, we’re continuing to expand the foundation established by our AxIO16 product releases,” said Mark Hamlyn, General Manager, Apogee Semiconductor. “The ARPS1020/ARPS1050 is the next step in executing our strategic roadmap and extending system-level fault management into power distribution.”
Empowering COTS Adoption Through a Scalable, Roadmap-Driven System Solution
The ARPS family represents the next milestone in Apogee’s strategic roadmap to deliver modular, fault-managed building blocks that enable COTS-based spacecraft architecture. When Paired with Apogee’s recently released AxIO16 family of radiation-hardened I/O expanders, ARPS devices form a cohesive system-level solution for modern space systems.
Key Radiation-Hardened Facts
- ARPS1020A5: 20 V at 8 A (23 mΩ RDSON)
- ARPS1050A5: 50 V at 4 A (57 mΩ RDSON)
- Industry’s smallest eFuse: 3 mm x 5 mm, 24-pin QFN
- Guaranteed break-before-make operation
- Over-current, short-circuit, and thermal protection
- Current sense output for external telemetry
- Fault output and state of switch output pins for system health monitoring
- True current sharing in paralleled implementations
- Radiation tolerant for LEO and GEO missions
Ordering & Availability
ARPS1020/ARPS1050 is now available for ordering online at ARPS1050A5/ARPS1020A5 | Apogee Semiconductor
Connect with our applications team at support@apogeesemi.com for support and design guidance.
About Apogee Semiconductor
Apogee Semiconductor is a leading provider of radiation-hardened semiconductor solutions for space, aerospace, and defense applications. The company develops high-performance microelectronics designed to withstand extreme environments, enabling mission-critical systems in the most challenging conditions. The company enables the use of COTS-based architecture through fault containment, fault management, and system-level observability across control, sensing, and power distribution.
Plano, Texas — October 21, 2025 — Apogee Semiconductor today announced that its AxIO16 Radiation Hardened I/O Expander has been selected as a 2025 Platinum Honoree in the Technology Innovators Award program by Military + Aerospace Electronics magazine, the highest recognition for breakthrough technologies that advance aerospace, defense, and high‑reliability systems. The AxIO16 product family is designed to expand and conserve FPGA and processor digital I/O via I²C/SMBus/SPI interfaces and integrates level translation across 1.4 V to 5.5 V rails, enabling robust scalable control architectures. The APIO16 is designed for LEO class environments with 30 krad (Si) resilience while the AFIO16 is ideal for GEO environments with 300 krad(Si) resilience. Both devices use the same 28 pin TSSOP footprint to simplify upgrades between LEO and GEO platforms.
