SFH 4550-EWFW
Overview
The SFH 4550-EWFW is a high-power infrared emitter from ams-OSRAM designed for high-intensity signaling at an 860nm wavelength. It features a narrow 6-degree viewing angle (plus/minus 3 degrees half angle), allowing for precise beam control and long-range detection in a standard T1 3/4 radial package. With a typical forward voltage of 1.5V and 630mW/sr minimum radiant intensity, it is optimized for high-efficiency optical systems.
Why Choose This Part
This emitter offers a very high radiant intensity of up to 1800 mW/sr, which significantly increases the signal-to-noise ratio in optical receivers. Its narrow 6-degree viewing angle eliminates the need for external collimating lenses in many applications, simplifying mechanical design. The 860nm wavelength provides a good balance between sensor sensitivity and reduced visible spectral emission.
Applications
Key Specifications
Getting Started
To drive this IR LED, use a constant current source or a transistor-switched circuit with a current-limiting resistor calculated for a 1.5V forward drop at 100mA. Ensure the radial T1 3/4 package is mounted with clear line-of-sight to the receiver, as the narrow 6-degree beam requires precise mechanical alignment. For pulsed operation, refer to the datasheet safe operating area to drive currents up to 1A for short durations.
SFH 4550 Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Radiant Intensity (Ie) Min @ If | Stock |
|---|---|---|
| SFH 4550-EWFW (this part) | 630m | 15,434 |
| SFH 4550 | 1100m | 69,329 |
