SFH 4259S
Overview
The SFH 4259S is a high-power 860nm infrared emitter designed for high-efficiency optical systems. Part of the Power TOPLED Lens family, it utilizes a double-stack emitter technology to achieve a high radiant intensity of 85mW/sr at 100mA in a compact 4-PLCC package. This emitter is optimized for applications requiring high forward current capabilities even at elevated temperatures up to 100 degrees C.
Why Choose This Part
The double-stack technology allows for significantly higher radiant output than standard IR LEDs while maintaining a standard 4-PLCC footprint. Its 50-degree viewing angle provides a focused beam that reduces light spill in optical sensors, and the 3.1V typical forward voltage ensures compatibility with standard 3.3V or 5V logic via current-limiting drivers.
Applications
Key Specifications
Getting Started
When designing for the SFH 4259S, use a constant-current LED driver or a switching regulator to maintain a steady 100mA forward current and prevent thermal runaway. Ensure the PCB layout includes sufficient copper area around the 4-PLCC pads for heat dissipation, as the component is rated for operation up to 100 degrees C. For prototyping, this surface-mount component is compatible with standard reflow soldering processes.
SFH 4259S Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Package | Temp Range | Radiant Intensity (Ie) Min @ If | Stock |
|---|---|---|---|---|
| SFH 4259S (this part) | PLCC-4 | -40degC ~ 100degC .. | 85m | 54,804 |
| SFH 4259S-VAW | SMD-4 | -40degC ~ 100degC | 45m | — |
