801-24C-24 (frequently written as 801-24C24) is a massive, multi-contact General Purpose Power T-Bar Relay. Originally designed by T-Bar Incorporated (later acquired by Electronic Controls Inc. and currently manufactured by Olympic Controls), this unique relay acts as a centralized master-control matrix. It is engineered to simultaneously switch a high volume of independent data, analog telemetry, or low-voltage power channels with a single mechanical actuator pulse.Thorough Part DescriptionThe T-Bar 801-24C-24 is an industrial, panel-mounted multi-pole power relay belonging to the high-capacity 800 Series product lineup.The defining characteristic of this component is its extraordinary 24PDT (24-Pole, Double-Throw) contact configuration, allowing it to route 24 completely independent circuits simultaneously.The integrated electrical actuator mechanism operates on a continuous nominal input potential of 24V DC, maintaining a coil resistance profile of 174 Ohms and an active power consumption rating of approximately 3.5 Watts.The relay’s switching contacts are rated to handle standard operating currents up to 5 Amps at 115V AC.The external body architecture relies on a specialized, dust-tight mechanical wafer stack assembly, routing every contact out to heavy-duty base pins optimized for specialized plug-in sockets or direct solder wire termination.Industry Equivalents (Cross-References)The Olympic Controls 801-24C24 is the active direct factory part number, representing the current commercial manufacturing standard for this exact design after legacy vendor consolidations.The Electronic Controls Inc. 801-24C/24 serves as the exact direct historical equivalent, identifying the same physical 24-pole footprint under the previous corporate brand identity.The T-Bar 801-24C-28 functions as a high-voltage alternative within the identical 800 Series layout, utilizing matching 24PDT switching paths but rewound for 28V DC control environments.History of the ComponentThe lineage of this component belongs to T-Bar Incorporated, a highly specialized electronic control firm founded in the mid-20th century to solve a specific engineering challenge: standard commercial relays maximized efficiency by providing only 2 to 4 poles. When computing networks, broadcasting studios, and automated test arrays required a system to completely cut off or transfer massive multi-wire wire trunks, engineers had to trigger dozens of standard relays at once. This created dangerous processing lags and phase errors.T-Bar solved this by inventing the "T-Bar" solenoid actuator design, which uses a central linear motor plunger to clamp down a dense stack of mechanical switching wafers simultaneously. The 800 series was optimized for higher current loads (up to 5A). This design established an un-clonable industry niche that later carried the product line through acquisitions by Electronic Controls Inc. (ECI) and eventually Olympic Controls.As solid-state multiplexers and high-speed digital packet switching systems dominated industrial computing in the late 1990s and 2000s, mechanical gang-switching became a legacy art form. However, because physical relays offer complete galvanic isolation and immunity to software hacking or electronic interference, T-Bar assemblies remain actively protected and produced to service demanding critical aerospace, data, and defense channels.Actual Product Applications (Makes and Models)The IBM System/360 Mainframe Architectures integrated these T-Bar multi-pole relays inside their peripheral switching centers, utilizing the massive 24PDT matrices to instantly swing active data paths away from failing memory storage drives down to redundant backup storage banks.The Collins Radio AN/TSC-60 Communications Central military shelter networks utilized these 24VDC T-Bar arrays to simultaneously decouple whole banks of analog teleprinter lines and control routing configurations when transitioning between alternative microwave signals.The Grass Valley Group Model 1600 Television Production Switcher systems regularly employed these dust-tight multi-contact relays inside their primary video routing racks, allowing engineers to clean-switch complex multi-wire analog editing feeds without manual patching.
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