Astronics / EADS / Racal 1250-20 Power Switching Module with Terminal Block

The Astronics / EADS / Racal 1250-20 is a modular power switching module designed to manage and distribute AC or DC power within test systems and electronic equipment. It integrates ten independent Double Pole Single Throw (DPST) relays capable of switching up to 8 A at 250 VAC rms or up to 5 A at 48 VDC, making it suitable for industrial and aerospace applications requiring reliable power control.

Technical Specifications

Relay Configuration: 10 independent DPST relays

AC Switching: Up to 8 A rms at 250 VAC rms

DC Switching: Up to 5 A at 48 VDC

Auxiliary Supply: Fused +13 VDC for external relay drive

Contact Monitoring: User-selectable confidence checking

Channel Architecture: Separate connections to both sides of each relay contact for independent operation or custom network configuration

Key Features

Terminal block for simplified field connections

Per-channel mounting holes for arc suppressors, filters, and other external components

Relay contact monitoring with selectable verification

Modular design compatible with the Racal 1250 Universal Switch Controller mainframe

Fused auxiliary DC supply eliminates external power distribution complexity

Typical Applications

Manual test systems requiring multi-channel AC/DC power switching

Automatic test equipment with relay-based signal routing

Industrial control and monitoring systems

Aerospace test benches and validation platforms

Compatibility & Integration The 1250-20 operates as a dedicated switching module within the Racal 1250 Universal Switch Controller series. It integrates directly into the controller mainframe without additional adapters. Separate relay contact connections allow flexible configuration for series, parallel, or independent switching topologies. The integrated terminal block simplifies wiring and reduces integration time in both bench and production test environments.