SFH 4725S Equivalent & Substitute Parts

Part Overview

The SFH 4725S is an Infrared (IR) Emitter operating at 950nm wavelength, designed for surface mount applications in 3-SMD, No Lead packaging. This component is classified as Obsolete, which necessitates identification of equivalent and substitute parts for ongoing design requirements and production continuity. The SFH 4725S delivers 320mW/sr radiant intensity at 1A forward current with a 90° viewing angle and operates across the temperature range of -40°C to 125°C.

Substiute Parts

SFH 4725S

ams-OSRAM USA INC.In Stock: 836SFH 4725S Datasheet

Current PartRFQ

SFH 4725AS-EA

ams-OSRAM USA INC.In Stock: 938SFH 4725AS-EA Datasheet

MFR RecommendedRFQ

ARE6-98D1-0FH00

Broadcom LimitedIn Stock: 839ARE6-98D1-0FH00 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH 4725S is determined by the following critical parameters:

Primary Compatibility Criteria:

• Wavelength range (950nm ± tolerance)
• Radiant intensity output (320mW/sr @ 1A minimum)
• Forward current rating (1A maximum)
• Forward voltage compatibility (2.75V typical)
• Viewing angle (90° or narrower acceptable)
• Operating temperature range (-40°C to 125°C minimum)
• Surface mount 3-SMD, No Lead package
• RoHS3 compliance

Substitute Classification:

Manufacturer Recommended Substitute: SFH 4725AS-EA represents the direct evolution within the ams-OSRAM product line, maintaining the same base product number (SFH 4725) and series designation (OSLON® Black). This part is Active status and provides enhanced performance specifications.

Similar Manufacturer Substitute: ARE6-98D1-0FH00 from Broadcom Limited operates at a similar wavelength (945nm) with comparable radiant intensity and current ratings, though from a different manufacturer and series.

Parameter Comparison

Engineering Selection Recommendations

SFH 4725AS-EA (Manufacturer Recommended Substitute):

This part is the preferred substitute for the obsolete SFH 4725S. Both components share the same base product number (SFH 4725) and OSLON® Black series designation, indicating direct product line continuity. The SFH 4725AS-EA maintains identical wavelength (950nm) and operating temperature range (-40°C to 125°C). The part is Active status, ensuring long-term availability and supply chain stability. Enhanced specifications include increased maximum forward current (1.5A versus 1A) and higher radiant intensity (560mW/sr @ 1A versus 320mW/sr @ 1A), providing design flexibility for applications requiring higher output. The narrower viewing angle (80° versus 90°) represents a minor optical characteristic change suitable for focused beam applications.

ARE6-98D1-0FH00 (Similar Manufacturer Substitute):

This Broadcom Limited component provides an alternative from a different manufacturer. The wavelength is 945nm, which is within the near-infrared spectrum and acceptable for many 950nm applications with minor spectral tolerance considerations. Radiant intensity matches the SFH 4725S at 320mW/sr @ 1A. The forward voltage is significantly lower (1.9V typical versus 2.75V), which affects circuit design and power consumption calculations. Operating temperature range extends to -40°C to 120°C, providing 5°C less upper temperature margin. Moisture sensitivity is superior (MSL 1 Unlimited versus MSL 2 1 Year). This part is suitable for applications where wavelength tolerance and lower forward voltage are acceptable trade-offs.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4725AS-EA directly replace the SFH 4725S without circuit modifications?

A: The SFH 4725AS-EA shares identical wavelength, package, and mounting type with the SFH 4725S. However, the forward voltage is 2.9V (versus 2.75V) and maximum current is 1.5A (versus 1A). Circuit current-limiting resistors and power supply voltage must be recalculated to accommodate these parameter changes. Direct pin-for-pin substitution is possible, but circuit design review is required.

Q: Is the 945nm wavelength of the ARE6-98D1-0FH00 compatible with 950nm applications?

A: The ARE6-98D1-0FH00 operates at 945nm, a 5nm difference from the SFH 4725S 950nm specification. Compatibility depends on the application's wavelength tolerance. Infrared receiver sensors typically have spectral response curves spanning 20nm or wider, making 945nm acceptable for most general-purpose IR applications. Application-specific receiver specifications must be verified.

Q: What is the impact of the viewing angle difference between the SFH 4725S (90°) and substitute parts (80°)?

A: The SFH 4725S provides a 90° viewing angle (wider beam), while both substitute parts offer 80° viewing angles (narrower beam). This affects the spatial distribution of infrared radiation. Applications requiring wide-angle coverage may require circuit design adjustments or multiple emitters. Applications requiring focused beam transmission benefit from the narrower angle.

Q: How do the forward voltage differences affect circuit design?

A: The SFH 4725S operates at 2.75V typical, the SFH 4725AS-EA at 2.9V, and the ARE6-98D1-0FH00 at 1.9V. These differences directly impact the voltage drop across the emitter and the required series resistor value for current limiting. A 1A design using the SFH 4725S requires recalculation when switching to the ARE6-98D1-0FH00 due to the 0.85V lower forward voltage, resulting in different resistor values and power dissipation.

Q: What is the significance of the Moisture Sensitivity Level (MSL) difference?

A: The SFH 4725S has MSL 2 (1 Year), meaning the component must be used within one year of packaging opening. The ARE6-98D1-0FH00 has MSL 1 (Unlimited), requiring no time-based storage restrictions. For high-volume production or long-term inventory management, the ARE6-98D1-0FH00 offers superior handling flexibility.

Q: Are all substitute parts RoHS3 compliant?

A: The SFH 4725S and ARE6-98D1-0FH00 are explicitly RoHS3 compliant. The SFH 4725AS-EA RoHS status is not specified in the provided data. Compliance verification with the component manufacturer is required before final selection for RoHS-regulated applications.

Q: Can the higher radiant intensity of the SFH 4725AS-EA (560mW/sr @ 1A) be used at reduced current levels?

A: Yes. The SFH 4725AS-EA can operate at currents below its 1.5A maximum rating. Operating at 1A (the SFH 4725S maximum) will produce radiant intensity between the SFH 4725S specification (320mW/sr @ 1A) and the SFH 4725AS-EA specification (560mW/sr @ 1A). Exact output at reduced current requires consultation of the component's current-versus-intensity characteristic curve.