SFH 4441 E9621 Equivalent & Substitute Parts

Part Overview

The SFH 4441 E9621 is an infrared (IR) emitter manufactured by ams-OSRAM USA INC., designed for applications requiring 950nm wavelength emission at 100mA forward current. This component operates at a typical forward voltage of 1.5V with a 34° viewing angle and is housed in a 2-SMD, No Lead surface mount package. The part is currently in active product status with ROHS3 compliance and MSL 2 moisture sensitivity rating.

Substitute parts become necessary when the primary component experiences extended lead times, inventory constraints, or when design flexibility permits alternative package configurations while maintaining core electrical performance parameters.

Substiute Parts

SFH 4441 E9621

ams-OSRAM USA INC.In Stock: 721SFH 4441 E9621 Datasheet

Current PartRFQ

SFH 4248-Z

ams-OSRAM USA INC.In Stock: 1114SFH 4248-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SFH 4441 E9621 is determined by the following critical parameters:

Mandatory Matching Parameters:

• Wavelength: 950nm
• Current - DC Forward (If) Max: 100mA
• Voltage - Forward (Vf) Typical: 1.5V
• Type: Infrared (IR) Emitter
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• MSL Rating: 2 (1 Year)

Allowable Variation Parameters:

• Viewing Angle: May vary within application tolerance
• Operating Temperature Range: May extend beyond the primary part's range
• Package / Case: Alternative SMD configurations permitted if PCB layout accommodates
• Product Status: Active or Obsolete parts qualify if electrical parameters align
• Radiant Intensity: Additional specification data acceptable

The SFH 4248-Z qualifies as a substitute based on matching wavelength (950nm), forward current (100mA), forward voltage (1.5V), mounting type (Surface Mount), RoHS compliance, and MSL rating. Differences in viewing angle (30° vs. 34°), package configuration (4-PLCC vs. 2-SMD), and operating temperature range (-40 to 100°C vs. -40 to 85°C) are allowable variations dependent on application requirements.

Parameter Comparison

Engineering Selection Recommendations

SFH 4441 E9621 (Primary Part)

Select this component when:

• PCB layout requires the compact 2-SMD, No Lead package configuration
• Operating environment remains within -40 to 85°C range
• 34° viewing angle specification is required for optical design
• Active product status and immediate availability are priorities
• MIDLED® Mini series integration is specified

SFH 4248-Z (Substitute Part)

Select this component when:

• PCB layout accommodates the 4-PLCC package footprint
• Operating environment extends to 100°C maximum temperature
• 30° viewing angle is acceptable for application requirements
• Radiant intensity specification of 100mW/sr @ 100mA is required
• Extended temperature performance is necessary
• Product status as Obsolete does not conflict with supply chain strategy

Both parts maintain ROHS3 compliance and identical electrical core specifications (950nm wavelength, 100mA forward current, 1.5V forward voltage), ensuring functional equivalence in IR emission characteristics. Package and thermal range differences require PCB layout verification and thermal analysis before final selection.

Frequently Asked Questions (FAQ)

Q: Can SFH 4248-Z directly replace SFH 4441 E9621 on existing PCBs?

A: Direct PCB replacement requires verification of package footprint compatibility. The SFH 4441 E9621 uses a 2-SMD, No Lead package, while the SFH 4248-Z uses a 4-PLCC package. Physical dimensions and pad layouts differ; PCB redesign or adapter solutions may be necessary.

Q: Are the electrical characteristics identical between these parts?

A: Core electrical parameters match: both operate at 950nm wavelength, 100mA maximum forward current, and 1.5V typical forward voltage. Viewing angle differs (34° vs. 30°), which affects optical beam characteristics. Radiant intensity data is provided for SFH 4248-Z but not specified for SFH 4441 E9621.

Q: What is the significance of the viewing angle difference?

A: Viewing angle determines the optical beam spread. The SFH 4441 E9621 provides a 34° angle, while SFH 4248-Z provides 30°. A narrower angle (30°) concentrates emission intensity over a smaller area. Application-specific optical design must confirm acceptability of this variation.

Q: Why is SFH 4248-Z listed as Obsolete?

A: Product status does not affect electrical or functional equivalence. Obsolete designation indicates the manufacturer has discontinued active production. Inventory availability may vary. Verify supplier stock before committing to this substitute.

Q: Does the extended operating temperature range of SFH 4248-Z provide an advantage?

A: The SFH 4248-Z operates to 100°C maximum, compared to 85°C for SFH 4441 E9621. This extended range is beneficial only if the application requires operation above 85°C. Standard applications within -40 to 85°C range do not require this additional capability.

Q: Are both parts RoHS compliant?

A: Yes. Both SFH 4441 E9621 and SFH 4248-Z are ROHS3 compliant with MSL 2 (1 Year) moisture sensitivity rating, meeting identical environmental and regulatory requirements.

Q: What does the radiant intensity specification mean?

A: Radiant intensity (100mW/sr @ 100mA for SFH 4248-Z) quantifies the optical power output per unit solid angle at maximum forward current. This specification is provided for SFH 4248-Z but not listed for SFH 4441 E9621. Applications requiring specific radiant intensity values should reference the SFH 4248-Z specification.