SML-S13RTT86 Equivalent & Substitute Parts

Part Overview

The SML-S13RTT86 is an Infrared (IR) Emitter operating at 850nm wavelength, designed for surface mount applications in the 1206 (3216 Metric) package. Manufactured by Rohm Semiconductor, this component delivers 1.5mW/sr radiant intensity at 20mA forward current with a typical forward voltage of 1.4V and maximum DC forward current rating of 30mA.

The SML-S13RTT86 carries a Product Status designation of "Not For New Designs," indicating it has been superseded or discontinued for new applications. This status necessitates identification of functionally equivalent substitute components that maintain compatibility with existing designs while offering active product support and continued availability.

Substiute Parts

SML-S13RTT86

Rohm SemiconductorIn Stock: 12201SML-S13RTT86 Datasheet

Current PartRFQ

APTD3216SF4C

KingbrightIn Stock: 10851APTD3216SF4C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for IR emitters is determined by the following critical parameters:

• Package Compatibility: Physical form factor must be 1206 (3216 Metric) surface mount to ensure PCB layout and reflow soldering compatibility
• Wavelength Tolerance: Operating wavelength must fall within the application's spectral sensitivity range; 850nm and 880nm are considered compatible for most IR receiver applications with standard bandpass filtering
• Electrical Performance: Forward voltage and current ratings must support the existing circuit design; substitute parts may exceed the original specifications without circuit modification
• Thermal Operating Range: Substitute must cover or exceed the original operating temperature envelope
• Compliance & Availability: Active product status with current RoHS3 compliance ensures supply chain continuity and regulatory adherence

The APTD3216SF4C from Kingbright meets these substitution criteria while offering enhanced electrical performance and active product status.

Parameter Comparison

Engineering Selection Recommendations

The APTD3216SF4C represents a direct functional substitute for the SML-S13RTT86 based on the following engineering criteria:

Package and Mechanical Compatibility: Both components utilize the 1206 (3216 Metric) surface mount package with identical footprints, enabling direct PCB layout compatibility without redesign.

Electrical Performance: The APTD3216SF4C exceeds the original specifications in maximum forward current (50mA vs. 30mA) and radiant intensity (1.6mW/sr vs. 1.5mW/sr @ 20mA), while maintaining a lower typical forward voltage (1.3V vs. 1.4V). These characteristics ensure the substitute will function within existing circuit designs without modification.

Wavelength Consideration: The 30nm wavelength difference (880nm vs. 850nm) remains within the spectral response bandwidth of standard IR receiver photodiodes and integrated receiver modules, maintaining optical system performance.

Regulatory and Supply Status: The APTD3216SF4C carries Active product status with ROHS3 compliance, ensuring regulatory adherence and supply chain continuity. The SML-S13RTT86's "Not For New Designs" status makes the substitute the appropriate choice for ongoing production and new applications.

Thermal Performance: The extended operating temperature range of the APTD3216SF4C (-40°C to 85°C vs. -30°C to 85°C) provides additional margin for applications requiring enhanced low-temperature performance.

Frequently Asked Questions (FAQ)

Q: Can the APTD3216SF4C be used as a direct replacement for the SML-S13RTT86 without circuit modification?

A: Yes. The APTD3216SF4C is electrically and mechanically compatible. The substitute's higher current rating and lower forward voltage are compatible with standard IR emitter driver circuits designed for the original part. No circuit redesign is required.

Q: What is the significance of the 30nm wavelength difference between 850nm and 880nm?

A: IR receiver photodiodes and integrated receiver modules typically have spectral response bandwidths of 100nm or greater, centered around 850-950nm. The 880nm wavelength of the APTD3216SF4C falls within this response range and will function with standard IR receiver components designed for 850nm emitters.

Q: Are there any thermal or moisture handling differences between these components?

A: Both components share identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours), requiring the same storage and handling protocols. The APTD3216SF4C extends the lower operating temperature limit by 10°C, providing additional thermal margin.

Q: Why is the SML-S13RTT86 marked "Not For New Designs"?

A: This designation indicates the component has been superseded in the manufacturer's product line. The APTD3216SF4C from Kingbright is an Active product with current manufacturer support, making it the appropriate choice for new applications and ongoing production.

Q: Will the higher maximum forward current rating of the APTD3216SF4C affect circuit performance?

A: No. Maximum current rating indicates the component's capability, not its operating point. Circuit design determines actual forward current through resistor selection. The substitute's higher rating provides additional design margin without affecting performance at the original operating current.