Product Overview
Vintage TIL414 NPN Silicon IR Sensor 50V 50mW T-1 3/4
Condition
New old stock, unopened in original vintage retail packaging. Packaging card shows light age-related surface wear and faint discoloration on the rear card, with internal component untouched. Unused component with factory straight leads.
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Product Overview
Archer Cat. No. 276-145 is a vintage TIL414 NPN silicon infrared phototransistor packaged by Radio Shack. Housed in a standard 5mm T-1 3/4 clear plastic resin package with two radial wire leads, it provides high optical sensitivity and fast switching response for optical detection, counting, and infrared signal reception.
Key Features
- Component type: NPN silicon infrared phototransistor
- Cross-reference equivalent: TIL414
- Package style: T-1 3/4 (5mm) clear resin radial leaded
- Collector-emitter breakdown voltage (V_CE): 50V max
- Emitter-collector breakdown voltage (V_EC): 7V max
- Power dissipation: 50mW continuous at 25 degrees C
- Operating temperature range: -40 to +100 degrees C
- Typical on-state light current: 7mA (V_CE = 5V, E_e = 20mW/cm²)
- Switching response: 8µs rise time, 6µs fall time
- Lead identification: Flat cathode index marks the collector; opposite lead is emitter
Applications
- Repairing legacy Tandy, Archer, and 1980s DIY optical sensor circuits without altering board footprints.
- Building tachometers, rotary encoders, or beam-break optical interrupters on prototyping breadboards.
- Restoring vintage infrared remote receiver modules and optical tape-end detectors.
- Benchtop maker experimentation with infrared transmitter and receiver pair designs.
Frequently Asked Questions
Which lead connects to the positive collector terminal?
The flat edge on the base of the plastic case rim identifies the collector pin. The rounded side opposite the flat edge is the emitter terminal.
Can this sensor detect visible light as well as infrared?
Because the lens is clear epoxy rather than black daylight-filtering resin, it responds to infrared light while also exhibiting sensitivity across the visible spectrum.
Why buy this single vintage packaged unit instead of bulk surplus lots?
You receive the exact intact Archer retail package shown in the photographs with factory-fresh leads and complete cardback pinout documentation, avoiding the bent leads or unknown provenance common with loose bulk grabs. Shipping is a flat $8 rate across your order, switches to free when your cart reaches $28, and leaves our Idaho warehouse the same or next business day.
A sealed piece of workbench history from the golden age of neighborhood electronics tinkering, ready to catch an invisible infrared beam in a modern build.
