SFH 4796S Equivalent & Substitute Parts

Part Overview

The SFH 4796S is an Infrared (IR) Emitter operating at 860nm wavelength, manufactured by ams-OSRAM USA INC. as part of the OSLUX series. This component is designed for surface mount applications with a 1414 (3535 Metric) package footprint. The device is classified as Obsolete, necessitating identification of active alternative components that maintain functional compatibility for existing designs requiring 860nm infrared emission at specified electrical and optical parameters.

Substiute Parts

SFH 4796S

ams-OSRAM USA INC.In Stock: 1051SFH 4796S Datasheet

Current PartRFQ

SFH 4717AS

ams-OSRAM USA INC.In Stock: 895SFH 4717AS Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH 4796S is determined by the following critical parameters:

Core Electrical Compatibility:

• Wavelength: 860nm (infrared spectrum match required)
• Forward Voltage (Vf): 3.15V typical (circuit voltage compatibility)
• Radiant Intensity: Minimum 450mW/sr @ 1A (optical output requirement)

Mechanical & Environmental Compatibility:

• Mounting Type: Surface Mount (PCB assembly compatibility)
• Operating Temperature Range: Minimum -40°C ~ 85°C (thermal envelope)
• RoHS3 Compliance: Required (regulatory requirement)

Acceptable Variations:

• Maximum DC Forward Current (If): May exceed 1A (higher current capability acceptable if circuit design permits)
• Viewing Angle: May differ from 80° (application-dependent; narrower angles acceptable for focused applications)
• Package / Case: May differ from 1414 (3535 Metric) if footprint redesign is feasible
• Moisture Sensitivity Level (MSL): May differ (handling and storage consideration)

The SFH 4717AS meets all core electrical and environmental requirements while offering enhanced specifications in current capacity and radiant intensity.

Parameter Comparison

Engineering Selection Recommendations

SFH 4717AS Substitution Feasibility:

The SFH 4717AS is an active product from ams-OSRAM USA INC. that provides functional substitution for the obsolete SFH 4796S. Both components share identical wavelength (860nm) and forward voltage (3.15V) specifications, ensuring circuit-level compatibility.

Advantages of SFH 4717AS:

• Active product status ensures long-term availability and supply chain continuity
• Enhanced radiant intensity (900mW/sr @ 1A versus 450mW/sr @ 1A) provides increased optical output
• Extended operating temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) accommodates broader thermal environments
• Improved moisture sensitivity level (MSL 2 versus MSL 3) reduces handling and storage constraints
• ROHS3 compliance maintained

Design Considerations:

• Package footprint differs: 1515 (3838 Metric) versus 1414 (3535 Metric). PCB layout modification required.
• Viewing angle narrower: 50° versus 80°. Optical design review necessary for wide-angle applications.
• Maximum current rating higher: 1.5A versus 1A. Existing current-limiting circuits remain valid.

Compliance Status: Both components maintain ROHS3 compliance, REACH Unaffected status, and EAR99 ECCN classification.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4717AS directly replace the SFH 4796S without circuit modification?

A: Electrical substitution is direct at the circuit level due to matching forward voltage (3.15V) and wavelength (860nm). However, PCB layout modification is required due to different package footprints (1515 versus 1414). Current-limiting circuits designed for 1A operation remain valid with the 1.5A-rated SFH 4717AS.

Q: What is the impact of the narrower viewing angle (50° versus 80°)?

A: The SFH 4717AS has a narrower viewing angle, concentrating optical output into a smaller solid angle. Applications requiring wide-angle infrared coverage must evaluate whether 50° viewing angle meets optical design requirements. Narrower angles are suitable for focused, directional infrared applications.

Q: Are there packaging and handling differences between these components?

A: Yes. The SFH 4796S is supplied in Cut Tape (CT) packaging with MSL 3 (168 Hours), while the SFH 4717AS is supplied in Tape & Reel (TR) packaging with MSL 2 (1 Year). The improved moisture sensitivity level of the SFH 4717AS reduces desiccant storage requirements and extends shelf life.

Q: Does the higher radiant intensity of the SFH 4717AS affect circuit design?

A: The higher radiant intensity (900mW/sr @ 1A versus 450mW/sr @ 1A) represents increased optical output at the same forward current. Existing current-limiting circuits operate unchanged. Applications may benefit from reduced forward current requirements to achieve equivalent optical output, potentially improving power efficiency.

Q: What is the significance of the extended operating temperature range?

A: The SFH 4717AS supports -40°C ~ 125°C versus -40°C ~ 85°C for the SFH 4796S. This extended range accommodates high-temperature industrial and automotive environments without thermal derating. Designs operating within the original -40°C ~ 85°C range experience no change.

Q: Are both components RoHS compliant?

A: Yes. Both the SFH 4796S and SFH 4717AS are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and distribution.