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SFH 4851

SFH 4851
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SFH 4851

Product catalog summary
Overview: The SFH 4851 is an infrared emitter with a wavelength of 850 nm, designed for applications in factory automation. It features a hermetically sealed metal can package (TO46) and is compatible with silicon photodetectors.
Specifications: The device operates within a temperature range of -40°C to 100°C and can handle a maximum forward current of 100 mA, with a pulsed forward current up to 1 A. The forward voltage ranges from 1.7 V to 1.9 V at 100 mA, and up to 4.5 V at 1 A. The emitter has a peak wavelength of 860 nm and a spectral bandwidth of 30 nm.
Performance Characteristics: The SFH 4851 offers short switching times with a rise and fall time of 12 ns. It has a radiant intensity of 2110 mW/sr at 1 A and a total radiant flux of 25 mW at 100 mA. The thermal resistance is specified as 350 K/W junction-case and 500 K/W junction-ambient.
Safety and Handling: The device is classified under the exempt risk group according to IEC 62471:2006 for photo biological safety. It is recommended to minimize exposure to aggressive substances to prevent performance degradation.
Packaging and Soldering: The SFH 4851 weighs approximately 360 mg. Recommended soldering involves a two-wave process with specific preheating and cooling rates. The device is not intended for use in safety-critical or medical applications without further analysis and coordination.
Additional Information: The datasheet includes a disclaimer regarding the variability of typical values due to manufacturing processes and advises consulting the latest version online for updates.
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Catalog excerpts

SFH 4851-1

Published by ams-OSRAM AG Tobelbader Strasse 30, 8141 Premstaetten, Austria Phone +43 3136 500-0 ams-osram.com © All rights reserved | 2023-01-24 1 | Version 1

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SFH 4851-2

Applications - Factory Automation Features - Package: hermetically sealed - ESD: 2 kV acc. to ANSI/ESDA/JEDEC JS-001 (HBM, Class 2) - Wavelength 850nm - Anode is electrically connected to the case - Short switching times - Spectral match with silicon photodetectors

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SFH 4851-3

Ordering Information  Type

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SFH 4851-4

Maximum Ratings TA = 25 °C Parameter Operating temperature Storage temperature Junction temperature Forward current Forward current pulsed tp ≤ 200 µs; D ≤ 0.005 Power consumption ESD withstand voltage acc. to ANSI/ESDA/JEDEC JS-001 (HBM, Class 2)

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SFH 4851-5

Peak wavelength Centroid wavelength Spectral bandwidth at 50% Irel,max (FWHM) Half angle Dimensions of active chip area Temperature coefficient of voltage Temperature coefficient of brightness Temperature coefficient of wavelength Thermal resistance junction case real Thermal resistance junction ambient rea

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SFH 4851-6

Relative Spectral Emission Radiation Characteristics

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SFH 4851-7

Forward current Relative Radiant Intensity Max. Permissible Forward Current Permissible Pulse Handling Capability IF = f (tp); duty cycle D = parameter; TA = 25°C

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SFH 4851-8

Permissible Pulse Handling Capability IF = f (tp); duty cycle D = parameter; TA = 85°C

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SFH 4851-9

Dimensional Drawing Further Information: Approximate Weight:

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SFH 4851-11

300 10 s max., max. contact time 5 s per wave Second wave Continuous line: typical process Dotted line: process limits Notes The evaluation of eye safety occurs according to the standard IEC 62471:2006 (photo biological safety of lamps and lamp systems). Within the risk grouping system of this IEC standard, the device specified in this data sheet falls into exempt risk group - Exempt. Subcomponents of this device contain, in addition to other substances, metal filled materials including silver. Metal filled materials can be affected by environments that contain traces of aggressive substances....

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SFH 4851-12

Disclaimer Attention please! The information describes the type of component and shall not be considered as assured characteristics. Terms of delivery and rights to change design reserved. Due to technical requirements components may contain dangerous substances. For information on the types in question please contact our Sales Organization. If printed or downloaded, please find the latest version on our website. Packing Please use the recycling operators known to you. We can also help you – get in touch with your nearest sales office. By agreement we will take packing material back, if it is...

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SFH 4851-13

Radiant intensity: Measured at a solid angle of Ω = 0.01 sr Brightness: The brightness values are measured with a tolerance of ±11%. Reverse Operation: This product is intended to be operated applying a forward current within the specified range. Applying any continuous reverse bias or forward bias below the voltage range of light emission shall be avoided because it may cause migration which can change the electro-optical characteristics or damage the LED. Forward Voltage: The forward voltages are measured with a tolerance of ±0.1 V. Total radiant flux: Measured with integrating sphere. Typical...

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SFH 4851-14

Revision History Version Ordering Information Maximum Ratings Characteristics Brand New Layout Applications

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SFH 4851-15

Published by ams-OSRAM AG Tobelbader Strasse 30, 8141 Premstaetten, Austria Phone +43 3136 500-0 ams-osram.com © All rights reserved

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*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.
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