Product Overview
Motorola MOC8107 NPN Phototransistor Optocoupler - New Stock, Sold Each
Condition
The photographed sample is representative of our stock of 18 units. It is a small six-pin package whose leads are formed into gull-wing bends for surface mounting rather than left straight for through-hole insertion, and the lead tips read dark in the photographs. The top face carries a legible Motorola logo, MOC8107 part marking, and a K712 code molded into it; the underside is marked KOREA with a small white circular F marking. The molded body shows no cracks, chips, or handling wear in the photos.
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Product Overview
The MOC8107 is a six-pin optocoupler with an NPN phototransistor output, pairing an infrared LED input with a photo-sensitive transistor to pass a control signal across an isolation barrier while keeping input and output circuits electrically separate. This example carries the Motorola logo molded into the package top alongside the MOC8107 and K712 markings, with KOREA marked on the reverse, and its six leads are formed into gull-wing bends for surface mounting, so it solders onto pads rather than dropping into a through-hole DIP socket. The part is rated for 5300 Vrms isolation voltage and an operating temperature range of -55C to 100C. Stock is new and unused, sold each - you receive one photographed-representative unit, not the full tray.
Key Features
- NPN phototransistor output optocoupler
- 5300 Vrms isolation voltage rating
- Operating temperature range -55C to 100C
- Six-pin package with gull-wing surface-mount formed leads
- Motorola manufacture, MOC8107 marking confirmed on the package
- New, unused condition, sold each
Applications
- Isolating a microcontroller's digital output from a relay or triac driver circuit
- Signal isolation across AC line voltage during industrial control panel repair
- Replacing a failed MOC8107 in legacy motor control or power supply feedback circuits
- Bench prototyping where a proven phototransistor-output optocoupler is needed in small quantities
Frequently Asked Questions
What does the MOC8107 optocoupler do?
It passes a control signal from an LED input to a phototransistor output across an isolation barrier, letting you switch or sense a signal without a direct electrical connection between the two sides of the circuit.
What package is this part in?
A six-pin dual in-line body with its leads formed into gull-wing bends for surface mounting, as shown in the photographs of the unit we ship - it solders onto pads rather than dropping into a through-hole DIP socket.
Is this a Motorola or Fairchild MOC8107?
The package pictured carries the Motorola logo, MOC8107 marking, and a K712 code - not a Fairchild mark. We have corrected the listed brand to Motorola to match what is stamped on the part itself. MOC8107 parts have been second-sourced by more than one manufacturer to the same datasheet, but the physical unit you receive here is Motorola-marked.
Can I order just the quantity I need?
Yes. We stock 18 of these and sell them individually, so you can order exactly the count your board or repair calls for instead of buying a full reel or tube of parts you will not use. Shipping is an $8 flat rate, free once your order passes $28, and orders leave our Idaho warehouse the same or next business day.
Motorola built its name on parts that just quietly worked, and this small six-pin optocoupler kept ground loops separated in gear that ran for decades without complaint. Count out what your build needs and let it get back to that same job.
