Specs side by side
2 parts compared · 13 differing specs across 14 total parameters.
| Parameter | ||
|---|---|---|
| Supply voltage | Same functional envelope; ranks per the vendor datasheet. | - |
| Memory & Peripherals | The choice for customers whose approved-vendor list excludes Asian opto brands. | - |
| Compatibility Level | Functional Equivalent | - |
| Component Category | - | Phototransistor Optocouplers |
| Core & Architecture | Avago/Broadcom member of the same 4-pin phototransistor family, used where the documentation chain prefers a Western brand. | - |
| Firmware Notes | Verify the rank window and the isolation class letter in the orderable number; Broadcom part numbers encode both. | - |
| Hardware Notes | Standard DIP-4 / SMD-4 footprint. | - |
| Lead Time Advantage | Shenzhen Spot Stock (24-48h Dispatch) | - |
| Market Reality | - | The PC817 is the optocoupler of SMPS feedback loops and low-speed isolation across every price class of equipment - one of the highest-volume optos ever made. Genuine supply is continuous, but the part is a specification, not a single part number: the CTR rank (A / B / C / D or combined bins) and the isolation class decide whether a substitute works, and the second-source universe (LTV-817, EL817, TLP521-1, HCPL-817) is enormous precisely because designers treat the function as generic. The buying question is always which rank and which vendor, not whether the part exists. |
| Reference Part | PC817 | - |
| Role In Circuit | - | Original Reference Part |
| Sourcing Advantage | Branded stock with full documentation for approval-heavy programs. | - |
| Sourcing Status | - | Active Shenzhen Spot Sourcing (24–48h) |
| Case | DIP-4 / SMD-4 | DIP-4 / SMD-4 |