SFH 4725S-EA Infrared Emitter: Equivalent & Substitute Parts

Part Overview

The SFH 4725S-EA is an infrared (IR) emitter manufactured by ams-OSRAM USA INC., designed for applications requiring 950nm wavelength emission. This component operates at 2.65V forward voltage with a maximum DC forward current of 1A and delivers 560mW/sr radiant intensity. The device is packaged in a 3-SMD, No Lead surface mount configuration with an 80° viewing angle.

The SFH 4725S-EA is classified as Obsolete in product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this infrared emitter.

Substiute Parts

SFH 4725S-EA

ams-OSRAM USA INC.In Stock: 885SFH 4725S-EA Datasheet

Current PartRFQ

SFH 4715AS R33

ams-OSRAM USA INC.In Stock: 3707SFH 4715AS R33 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH 4725S-EA is evaluated based on the following criteria derived from the provided parameters:

Mechanical Compatibility:

• Package type must be 3-SMD, No Lead
• Mounting type must be Surface Mount
• Viewing angle must be 80°
• Orientation must be Top View

Electrical Compatibility:

• Operating temperature range must encompass -40°C to 125°C
• Forward voltage and maximum current must be compatible with existing circuit design
• Radiant intensity must meet or exceed application requirements

Functional Compatibility:

• Wavelength determines application suitability; substitutes operating at different wavelengths serve different spectral requirements

The SFH 4715AS R33 is identified as a manufacturer-recommended substitute. This part shares the same mechanical package (3-SMD, No Lead), mounting type (Surface Mount), viewing angle (80°), and operating temperature range (-40°C to 125°C). However, it operates at a different wavelength (860nm) and has different electrical characteristics (3.15V forward voltage, 1.5A maximum current, 710mW/sr radiant intensity).

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The SFH 4725S-EA is classified as Obsolete. The SFH 4715AS R33 is classified as Active and is in current production with 3688 units in stock, compared to 801 units of the obsolete part. This status difference provides significant supply chain advantage for long-term availability.

Compliance and Certification: The SFH 4715AS R33 carries ROHS3 compliance certification and specifies Moisture Sensitivity Level (MSL) 4 (72 Hours), indicating compliance with current environmental and handling standards. These certifications support integration into modern manufacturing environments and regulatory compliance frameworks.

Mechanical and Thermal Compatibility: Both parts share identical mechanical specifications (3-SMD, No Lead package, Surface Mount, 80° viewing angle, -40°C to 125°C operating range), confirming direct PCB layout and thermal design compatibility.

Electrical and Optical Differences: The substitute operates at 860nm wavelength versus 950nm for the main part. This wavelength difference is application-specific and must be evaluated against system requirements. The substitute exhibits higher forward voltage (3.15V vs. 2.65V) and higher maximum current rating (1.5A vs. 1A), requiring circuit verification. The substitute delivers higher radiant intensity (710mW/sr vs. 560mW/sr), which may provide performance benefits in optical detection applications.

Selection Basis: Selection between these parts must be based on wavelength requirements of the target application. If 950nm wavelength is mandatory, the SFH 4725S-EA remains the only option despite obsolescence status. If 860nm wavelength is acceptable or preferred, the SFH 4715AS R33 provides superior supply availability, active production status, and regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4715AS R33 be used as a direct drop-in replacement for the SFH 4725S-EA?

A: Mechanical and thermal compatibility is confirmed. However, the wavelength difference (860nm vs. 950nm) and electrical parameter differences (3.15V vs. 2.65V forward voltage) require application-level evaluation. Direct substitution is only valid if the system design accepts 860nm wavelength operation and the power supply can accommodate 3.15V bias voltage.

Q: What is the primary reason for substitution?

A: The SFH 4725S-EA is Obsolete. The SFH 4715AS R33 is Active in production with significantly higher inventory availability (3688 vs. 801 units), ensuring long-term supply continuity.

Q: Are there packaging differences between these parts?

A: Both parts use identical 3-SMD, No Lead surface mount packages. The SFH 4715AS R33 is supplied in Tape & Reel (TR) format, which is standard for high-volume production. The main part packaging format was not specified in available data.

Q: Does the higher radiant intensity of the SFH 4715AS R33 affect compatibility?

A: Higher radiant intensity (710mW/sr vs. 560mW/sr) represents increased optical output. In applications where optical power is limited by the emitter, this provides performance improvement. In applications with fixed optical requirements, the higher output does not create incompatibility but may require optical attenuation or detector gain adjustment.

Q: What circuit modifications are required for substitution?

A: The forward voltage difference (3.15V vs. 2.65V) requires verification of power supply capability and bias circuit design. Current-limiting circuits designed for 1A operation remain valid for the substitute's 1.5A maximum rating. Wavelength-dependent optical coupling and detector sensitivity must be evaluated against application specifications.

Q: Is the SFH 4715AS R33 compliant with current environmental standards?

A: Yes. The SFH 4715AS R33 is ROHS3 Compliant and specifies Moisture Sensitivity Level (MSL) 4 (72 Hours), meeting current environmental and handling requirements for modern manufacturing processes.

Q: What is the viewing angle compatibility?

A: Both parts specify 80° viewing angle, confirming identical beam divergence and spatial coverage patterns. No optical redesign is required from a beam geometry perspective.