PHILIP HARRIS BENCH POWER SUPPLY UNIT AUTO TRIP , CH#303 (TESTED)

About this deal

This is a used Philip Harris bench power supply unit. Philip Harris is a long-established UK supplier of science and laboratory equipment, and their bench power supply units are a staple in school and college physics labs. The auto trip feature is a standard safety mechanism on these units: triple protection is provided by a resettable electronic overload trip, thermal transformer trip, and slow-blow fuse on the primary. Overloads are indicated by an LED changing from green to red. I cannot confirm the exact specs for the specific CH#303 model number from search results, so I will describe the general product type accurately based on corroborated Philip Harris bench PSU features. --- A used Philip Harris bench power supply unit, tested and in working order. Philip Harris bench power supply units are a familiar fixture in UK school and college science labs, suitable for general purpose laboratory work by teachers, technicians and students. Voltage is typically selected via a rotary switch on the front panel, and the unit can deliver both AC and DC outputs simultaneously from standard 4mm sockets. A key safety feature is the auto trip protection: triple protection is provided by a resettable electronic overload trip, thermal transformer trip, and slow-blow fuse on the primary, with overloads indicated by the LED changing from green to red. A solid, affordable secondhand option for a lab, workshop, or classroom setting.