Description
The Zenith 905-00090 (often listed in service manuals as part number 905-90 or the 905-90 IC Kit) is an original equipment manufacturer (OEM) replacement power module, physically featuring the authentic Sanken STR-30123 thick-film hybrid integrated circuit. Extensively utilized as a primary-side fixed voltage regulator in line-operated television chassis and vintage display monitors, this power management device integrates a high-performance triple-diffused planar Darlington power switching transistor alongside its dedicated reference voltage and error feedback drive circuitry inside a single robust module.
Key Features:
- Manufacturer: Sanken Electric Co., Ltd. (Sourced and cataloged as an OEM factory replacement part by the Zenith Electronics service network).
- Factory Part Numbers: Zenith 905-00090 / 905-90 (Directly replaces standard Sanken STR-30123 / STR30123 configurations).
- Package Type: 5-Pin Single In-line Power Package (SIP-5 / ZIP-5 / TO-3P modification) featuring an integrated metal cooling fin with a single pre-drilled mounting hole for secure heat sink coupling.
- Electrical Specifications: Delivers a highly stable, fixed output target of 123V (±0.8V) under a 200V maximum peak input voltage ceiling, rated for up to 1.0A of continuous output current and 27W of maximum power dissipation.
- Common Chassis Applications: Widely relied upon for rebuilding primary power regulation stages in classic color televisions, arcade video display units (famously deployed at location IC4 on Wells Gardner K7000-series boards), and as a precise replacement for the 223-18-01 regulator on Zenith K7000A monitor chassis.
- Condition: Brand New / New Old Stock (NOS)
This critical replacement semiconductor block is highly sought after by retro arcade technicians, vintage TV repair benches, and classic CRT restoration hobbyists requiring an authentic OEM cross-referenced component to restore power grid rails back to original factory parameters.