VSMB14942 Equivalent & Substitute Parts

Part Overview

The VSMB14942 is an infrared (IR) emitter operating at 940nm wavelength, manufactured by Vishay Semiconductor Opto Division. This component is designed for side-view applications requiring 100mA maximum forward current with a 32° viewing angle in a 1210 (3225 Metric) surface mount package. The product is currently obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

VSMB14942

Vishay Semiconductor Opto DivisionIn Stock: 3471VSMB14942 Datasheet

Current PartRFQ

15412094A2070

Würth ElektronikIn Stock: 270115412094A2070 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VSMB14942 is determined by the following critical parameters:

• Wavelength: Must be 940nm to maintain compatibility with receiver circuits and optical filtering
• Mounting Type: Must be surface mount to fit existing PCB layouts
• Orientation: Must be side view to match optical path requirements
• Operating Temperature Range: Must support -40°C ~ 85°C minimum
• Compliance Standards: Must maintain ROHS3 compliance and equivalent environmental certifications

The substitute part 15412094A2070 (Würth Elektronik WL-SISW series) meets these core substitution criteria. Variations in forward current rating, forward voltage, radiant intensity, viewing angle, and package size represent acceptable trade-offs when the primary functional parameters align.

Parameter Comparison

Engineering Selection Recommendations

The 15412094A2070 (Würth Elektronik WL-SISW) is a qualified substitute for the obsolete VSMB14942. Both components share identical wavelength (940nm), operating temperature range (-40°C ~ 85°C), orientation (side view), and compliance certifications (ROHS3, REACH Unaffected, EAR99).

The substitute part operates at reduced maximum forward current (50mA versus 100mA) and features a narrower viewing angle (20° versus 32°). These differences require circuit-level evaluation to confirm compatibility with existing driver circuits and optical system requirements. The substitute part is currently in active production status, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can the 15412094A2070 directly replace the VSMB14942 without circuit modifications?

A: Direct replacement depends on your circuit design. Both parts share the same wavelength, operating temperature range, and compliance standards. However, the substitute operates at lower maximum current (50mA vs. 100mA) and has a narrower viewing angle (20° vs. 32°). Verify that your driver circuit and optical system accommodate these differences.

Q: What is the significance of the package size difference (1210 vs. 1206)?

A: The VSMB14942 uses a 1210 (3225 Metric) package, while the substitute uses 1206 (3216 Metric). The 1206 package is slightly smaller. PCB footprint compatibility must be confirmed before substitution. Layout modifications may be required.

Q: Are both parts RoHS compliant?

A: Yes. Both the VSMB14942 and 15412094A2070 are ROHS3 compliant with identical Moisture Sensitivity Level (MSL 3, 168 Hours) ratings.

Q: Why is the VSMB14942 listed as obsolete?

A: The VSMB14942 has been discontinued by Vishay Semiconductor Opto Division. The 15412094A2070 represents an active production alternative with equivalent core optical and environmental specifications.

Q: How do the radiant intensity values compare?

A: The VSMB14942 provides 2.8mW/sr @ 20mA, while the substitute provides 3mW/sr @ 20mA. Both measurements are taken at the same reference current, making them directly comparable. The substitute exhibits slightly higher radiant intensity.