Product Overview
TLP721F Transistor Output Optocoupler - 4000 V Isolation, Single Channel, 4-Pin Plastic DIP
Condition
Unused new old stock (NOS). Markings legible: Toshiba logo, P721F. Sold each.
Ships same or next business day from our Idaho warehouse. Honest pricing, no nonsense.
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Product Overview
Toshiba TLP721F is a single-channel optocoupler: an LED input drives a transistor output through light, with 4000 V of isolation between the two sides.
Key Features
- Type: transistor output optocoupler, one element
- Isolation voltage: 4000 V
- Collector-emitter breakdown voltage: 55 V minimum
- Current transfer ratio (CTR): 50%
- Package: 4-pin plastic DIP
Applications
- Replacing a failed optocoupler on a board whose silkscreen or parts list calls for TLP721F or P721F
- Carrying a logic signal from a microcontroller to a circuit at a different ground or voltage
- Isolating a switch or sensor input from the controller that reads it
Frequently Asked Questions
How many optocouplers are in one package?
One. The TLP721F is a single-channel part, so each signal path you isolate takes its own chip.
Is the TLP721F still in production?
No. The TLP721F is obsolete.
The body reads P721F, not TLP721F. Is it the same part?
Yes. Toshiba marks this package without the TL prefix, so P721F under the Toshiba logo is the TLP721F.
The price-break table on this page gives the price per piece at each quantity.
An LED on one side, a transistor on the other, and nothing but light crossing between two circuits that never share a wire. Toshiba has retired the TLP721F, and the empty four-pin spot on your board has not heard the news.
