SFH 4441 Equivalent & Substitute Parts

Part Overview

The SFH 4441 is an Infrared (IR) Emitter operating at 950nm wavelength, designed for surface mount applications requiring 100mA forward current and 1.5V forward voltage. This component is classified as Obsolete product status, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement continuity.

Substiute Parts

SFH 4441

ams-OSRAM USA INC.In Stock: 803SFH 4441 Datasheet

Current PartRFQ

SFH 4248-Z

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

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SFH 4441 is determined by the following critical electrical and mechanical parameters:

Primary Matching Criteria:

• Wavelength: 950nm (infrared spectrum alignment)
• Current Rating: 100mA maximum DC forward current
• Voltage: 1.5V typical forward voltage
• Mounting Type: Surface Mount technology
• Type Classification: Infrared (IR) Emitter

Secondary Compatibility Factors:

• Operating Temperature Range: Minimum -40°C to 85°C
• RoHS3 Compliance: Required for regulatory alignment
• Radiant Intensity: Minimum 65mW/sr @ 100mA
• Viewing Angle: 34° nominal

The SFH 4248-Z qualifies as a substitute based on matching wavelength (950nm), forward current (100mA), forward voltage (1.5V), surface mount technology, and RoHS3 compliance. Package configuration differs (4-PLCC versus 2-SMD, No Lead), and radiant intensity is higher (100mW/sr @ 100mA), with extended operating temperature range (-40°C ~ 100°C).

Parameter Comparison

Engineering Selection Recommendations

Electrical Compatibility: The SFH 4248-Z maintains identical electrical specifications for wavelength (950nm), forward current (100mA), and forward voltage (1.5V), ensuring functional equivalence in circuit operation. The substitute provides higher radiant intensity (100mW/sr versus 65mW/sr), which represents improved optical output performance.

Thermal Performance: The SFH 4248-Z extends the operating temperature range to -40°C ~ 100°C compared to the SFH 4441 range of -40°C ~ 85°C, providing broader thermal operating capability.

Regulatory Compliance: Both components maintain ROHS3 compliance and identical Moisture Sensitivity Level (MSL 2, 1 Year), ensuring regulatory and handling requirements remain consistent.

Package Consideration: The primary difference is package configuration: SFH 4441 uses 2-SMD, No Lead format while SFH 4248-Z uses 4-PLCC format. This difference requires PCB layout and footprint modification during substitution.

Product Status: Both components are classified as Obsolete. Substitution addresses procurement continuity for the discontinued SFH 4441.

Frequently Asked Questions (FAQ)

Q: Can the SFH 4248-Z directly replace the SFH 4441 without circuit modification?

A: Electrical parameters are identical (950nm wavelength, 100mA forward current, 1.5V forward voltage), allowing circuit operation without modification. However, package configuration differs (4-PLCC versus 2-SMD, No Lead), requiring PCB footprint redesign.

Q: What is the significance of the higher radiant intensity in the SFH 4248-Z?

A: The SFH 4248-Z provides 100mW/sr @ 100mA compared to 65mW/sr @ 100mA in the SFH 4441. This represents increased optical output intensity at identical forward current, potentially improving detection range or signal strength in infrared applications.

Q: Does the viewing angle difference affect substitution suitability?

A: The SFH 4248-Z has a 30° viewing angle versus 34° for the SFH 4441. This narrower angle may affect optical coverage in applications requiring wider beam distribution. Application-specific optical requirements determine substitution feasibility.

Q: Are there compliance or handling differences between these components?

A: Both components maintain ROHS3 compliance and identical Moisture Sensitivity Level (MSL 2, 1 Year). Handling, storage, and regulatory requirements remain consistent.

Q: Why is the operating temperature range extended in the SFH 4248-Z?

A: The SFH 4248-Z supports -40°C ~ 100°C operation compared to -40°C ~ 85°C for the SFH 4441. This extended upper temperature limit provides operational capability in higher thermal environments.

Q: What packaging format does the SFH 4248-Z use?

A: The SFH 4248-Z uses 4-PLCC (Plastic Leaded Chip Carrier) package format, differing from the SFH 4441 2-SMD, No Lead configuration. PCB design modifications are required for physical integration.