Product Overview
Abbott Transistor 11541 Enclosed DC-DC Converter 24-30VDC to 8VDC
Condition
Used. Hand-pulled from decommissioned equipment. Evaluation: Visual inspection only. Function testing not performed. Markings stamped on nameplate: MODEL NO. C8D7.5, PART NO. 11541, SERIAL NO. 79202. Serial number 79202 is also stamped directly into the aluminum base plate edge.
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Product Overview
Abbott Transistor Laboratories model C8D7.5 (part number 11541) is a baseplate-cooled regulated DC-DC converter module housed in a rugged black metal enclosure. Engineered for 24 to 30 VDC direct current input systems, it delivers a regulated 8 VDC nominal output rated for continuous delivery up to 7.5 amps. A machined aluminum baseplate provides direct conduction cooling to external chassis or heatsink surfaces, while an adjustable potentiometer trimmer sits beneath a threaded cap on the top panel for output fine-tuning.
Key Features
- Nominal input voltage range: 24 to 30 VDC (Terminals 1 positive, 2 negative)
- Nominal output: 8 VDC at 7.5 A continuous (Terminals 3 positive, 4 negative)
- Top-mounted voltage adjustment potentiometer under knurled screw cover
- Maximum baseplate operating temperature: 212°F (100°C)
- Thermal indicator dot near baseplate designed to darken at 220°F
- External input fusing requirement: 8 A maximum
- Four flying lead wires exiting top potted feedthrough
- Machined aluminum mounting baseplate with four threaded corner holes
Applications
- Restoring regulated 8V DC power on legacy industrial control cabinets powered from 24V or 28V buses
- Bench testing and field replacement in military or avionics assemblies referencing NSN 6130-01-309-7913
- Supplying steady high-current 8V DC power for custom maker electronics, analog audio gear, or radio chassis mounted to a heatsink
Frequently Asked Questions
How is the output voltage adjusted?
Unscrew the threaded black cap marked ADJ. POT on the top panel to expose the internal multi-turn adjustment trimmer.
What are the input and output terminal wire assignments?
According to the side metadata plate, Terminal 1 is input positive, Terminal 2 is input negative, Terminal 3 is output positive, and Terminal 4 is output negative.
Does this power module require a heatsink during operation?
Yes. The baseplate must be mounted securely to a heatsink or chassis plate during operation to keep base temperatures under 212°F.
What condition is this module in and what testing was performed?
This unit was removed from decommissioned equipment. It has received a visual inspection of the housing, baseplate, and wiring harness, but internal electrical testing has not been performed.
Built back when industrial power modules were sealed like field gear and bolted straight to solid cold plates. Fasten it down to your heatsink, feed your 24-volt rail in, and put that 8-volt supply back to work.
