SEP8736-003 Infrared Emitter 880nm Equivalent & Substitute Parts

Part Overview

The SEP8736-003 is an infrared (IR) emitter manufactured by Honeywell Sensing and Productivity Solutions, designed for applications requiring 880nm wavelength emission at 50mA maximum forward current. This component operates at a typical forward voltage of 1.7V with a radiant intensity of 1.7mW/cm² at 20mA and features a 10° viewing angle in a radial through-hole package configuration.

The SEP8736-003 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for systems utilizing this component.

Substiute Parts

SEP8736-003

Honeywell Sensing and Productivity SolutionsIn Stock: 790SEP8736-003 Datasheet

Current PartRFQ

QEE122

onsemiIn Stock: 1774QEE122 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SEP8736-003 is determined by the following critical parameters:

Primary Matching Criteria:

• Wavelength: 880nm (exact match required)
• Current - DC Forward (If) Max: 50mA (exact match required)
• Voltage - Forward (Vf) Typical: 1.7V (exact match required)
• Mounting Type: Through Hole (exact match required)
• Package / Case: Radial (exact match required)
• Orientation: Side View (exact match required)

Secondary Compatibility Factors:

• Operating Temperature Range: Must encompass or exceed the original specification (-40°C to 85°C minimum)
• RoHS Compliance: Must maintain equivalent environmental compliance status
• Radiant Intensity: Measured under different test conditions but must support equivalent optical performance

The QEE122 manufactured by onsemi satisfies all primary matching criteria. While the QEE122 exhibits a wider viewing angle (50° versus 10°) and higher radiant intensity specification (4mW/sr @ 100mA versus 1.7mW/cm² @ 20mA), these parameters represent enhanced optical performance characteristics that do not preclude substitution in applications designed for the SEP8736-003.

Parameter Comparison

Engineering Selection Recommendations

SEP8736-003 (Honeywell) - Primary Part:

• Product Status: Obsolete
• Current Inventory: 693 pieces available
• Suitable for: Existing stock utilization, legacy system maintenance, immediate deployment where inventory exists
• Compliance: RoHS Compliant

QEE122 (onsemi) - Substitute Part:

• Product Status: Active
• Current Inventory: 1,700 pieces available
• Suitable for: New designs, production continuity, long-term supply assurance
• Compliance: ROHS3 Compliant (enhanced environmental standard)
• Additional Advantages: Extended operating temperature range (-40°C to 100°C), wider viewing angle (50°), higher radiant intensity specification

For applications requiring immediate component availability with exact parameter matching, the SEP8736-003 remains viable through existing inventory. For new production runs, design revisions, or long-term supply planning, the QEE122 provides equivalent electrical and mechanical compatibility with the advantage of active product status and enhanced compliance certification.

Frequently Asked Questions (FAQ)

Q: Can the QEE122 directly replace the SEP8736-003 in existing circuit designs?

A: Yes. The QEE122 matches all critical electrical parameters: 880nm wavelength, 50mA maximum forward current, and 1.7V typical forward voltage. Both components feature identical mounting type (through-hole), package configuration (radial), and orientation (side view). No circuit modifications are required for substitution.

Q: What is the significance of the different viewing angle specifications (10° versus 50°)?

A: The SEP8736-003 specifies a 10° viewing angle, while the QEE122 specifies 50°. A wider viewing angle indicates light emission over a broader spatial distribution. In applications where the original 10° narrow-beam characteristic is critical to system performance, the QEE122's wider angle may alter optical behavior. Conversely, in applications tolerant of broader light distribution, the QEE122 provides enhanced optical coverage.

Q: Are the radiant intensity measurements directly comparable between the two parts?

A: No. The SEP8736-003 specifies radiant intensity as 1.7mW/cm² at 20mA, while the QEE122 specifies 4mW/sr at 100mA. These measurements use different units and test conditions. Direct numerical comparison is not valid. Both specifications indicate adequate optical output for 880nm infrared applications; however, system-level optical performance validation is necessary if the original design relied on specific intensity characteristics.

Q: What is the impact of the extended operating temperature range in the QEE122?

A: The QEE122 operates across -40°C to 100°C, compared to the SEP8736-003 range of -40°C to 85°C. This 15°C extension at the upper temperature limit provides additional thermal margin. For applications operating near 85°C, the QEE122 offers improved reliability and reduced thermal stress. For applications within the original -40°C to 85°C range, both components are equivalent.

Q: Is the QEE122 packaging compatible with the SEP8736-003 footprint?

A: Yes. Both components use radial through-hole packages with side-view orientation. Physical footprint and PCB mounting are identical. No board redesign or mechanical modification is required for substitution.

Q: What is the difference between RoHS Compliant and ROHS3 Compliant?

A: ROHS3 represents an updated version of the RoHS (Restriction of Hazardous Substances) directive with enhanced environmental restrictions. ROHS3 compliance indicates adherence to current regulatory standards. Both designations confirm the absence of restricted substances; ROHS3 represents a more current certification level.

Q: Which part should be selected for new product designs?

A: The QEE122 is recommended for new designs. It maintains active product status, ensuring long-term availability and supply chain stability. The extended operating temperature range and enhanced compliance certification provide additional design margin and regulatory alignment.

Q: Can the SEP8736-003 be used for new production runs?

A: The SEP8736-003 is classified as obsolete. While 693 pieces are currently in inventory, future availability is not guaranteed. New production runs should transition to the QEE122 to ensure supply continuity and avoid future component obsolescence issues.