Product Overview
TLP721F Phototransistor Optocoupler - 4000Vrms Isolation, DIP-4, Signal Isolation for Power Supplies and Motor Control
Condition
Unused NOS - new old stock sourced from an electronics distributor consolidating inventory. Pins appear straight and unsoldered. Body clean. Evaluation: Visual inspection only. Function testing not performed.
Ships same business day from Idaho. Packed carefully.
Backed by our guarantee.
Product Overview
Toshiba TLP721F (also marked P721F) is a 4-pin DIP optocoupler combining a GaAs infrared emitting diode with a phototransistor output. Provides 4000Vrms minimum isolation voltage. Discontinued by Toshiba - available in NOS form only. The TLP721F designation indicates the part is tested to TLP721 specifications.
Key Features
- Isolation voltage: 4000Vrms minimum
- Package: DIP-4 (Dual In-line Package, 4-pin), 7.62mm pitch
- Output device: Phototransistor
- Collector-emitter voltage (VCEO): 55V minimum
- Current transfer ratio (CTR): 50% minimum (GB rank: 100% minimum)
- Input forward current (IF): 60mA maximum continuous
- Operating temperature: -25°C to 85°C
Applications
- Switch-mode power supply feedback circuits
- Motor control signal isolation
- Industrial automation control interfaces
- Data communication isolation
- Repair and replacement in existing designs using TLP721F or P721F
Frequently Asked Questions
Is this a through-hole or surface-mount component?
Through-hole, DIP-4 package with 7.62mm pin pitch. Designed for standard PCB through-hole mounting.
What CTR rank is this unit?
Not confirmed. The TLP721F has a minimum CTR of 50%. A GB-rank variant has a minimum CTR of 100%. Verify the date code markings against Toshiba datasheet rank designations before use if CTR rank is critical for your application.
Can this replace a TLP721?
The TLP721F is tested to TLP721 specifications. Not confirmed whether it is a direct drop-in for all TLP721 variants - verify pinout and CTR rank against your circuit requirements.
What is included with this purchase?
The IC only. No datasheet, packaging, or accessories included.
The TLP721F stopped being manufactured before most current designs were drawn. That makes NOS stock the only path to keeping a working board alive - and this one is clean, untouched, and ready to drop in.
