Description
ESI 83561 +5 Volt Power Supply Plug-In Module Card As-Is For Parts
The ESI 83561 is a +5 VDC plug-in power supply module made by ESI (Electro-Scientific Industries) of Portland, Oregon. It is designed to seat into a compatible ESI card cage or instrument chassis, providing regulated +5-volt DC power to the system via a rear multi-pin connector. The module uses a linear power supply topology with a mains transformer, rectifier, and filter capacitors housed in an open-frame aluminum enclosure with a front-panel pull handle for easy extraction.
Specifications & What's Included
- Brand: ESI (Electro-Scientific Industries), Portland, Oregon, USA
- Model: 83561
- Output Voltage: +5 VDC
- Form Factor: Plug-in card/module (card cage mount)
- Rear connector: Multi-pin edge/card connector (blue, visible in photos)
- Chassis: Open-frame aluminum enclosure with front pull handle
- Internal components: Mains transformer, electrolytic capacitors, PCB, wiring harness
- Sold as-is for parts or repair — untested, no functionality guarantee
Applications
ESI (Electro-Scientific Industries) was a Portland, Oregon-based manufacturer of precision electronic test and measurement instruments, best known for laser systems, component analyzers, and impedance bridges. Plug-in power supply modules like the 83561 were used as internal power sources within ESI's modular instrument chassis, delivering regulated DC voltage to measurement circuits and logic boards. This type of card-cage power module is typical of 1970s and 1980s-era instrument design, when bench instruments were built around replaceable plug-in subsystems that could be serviced or swapped individually. Units like this are sought today by technicians maintaining or restoring ESI equipment, as well as by electronics hobbyists and vintage instrument collectors sourcing replacement parts for ESI chassis systems.
This ESI 83561 +5 Volt Power Supply Plug-In module has not been tested and we cannot confirm it is functional. It appears to be in good physical condition cosmetically — the aluminum chassis is intact, the front panel label is clear, and the pull handle is present. Internal components including the transformer, capacitors, and PCB are visible and appear undamaged. The rear multi-pin connector is present. This unit is being sold strictly as-is for parts or repair with no functionality guarantee. Please view our photo set and contact us if you have any questions.
Warranty Information
Additional Information
Brand: |
ESI |
Model: |
83561 |
MPN: |
83561 |
Type: |
Plug-In Power Supply Module |
SKU: |
46372 |
Output Voltage: |
+5 VDC |
Form Factor: |
Plug-In Card/Module |
Connector Type: |
Multi-pin edge/card connector (rear) |
Condition: |
As-Is / For Parts or Not Working |
Seller Notes: |
Sold as-is for parts or repair. Unit has not been tested. |
Country/Region of Manufacture: |
United States |
Compatible With: |
ESI instrument chassis / card cage systems |
Condition Notes: |
ESI 83561 +5V Power Supply Plug-In sold as-is for parts or repair. Unit has not been tested and is not guaranteed functional. Cosmetically appears intact. No functionality warranty. |
