MSQ6111C Equivalent & Substitute Parts

Part Overview

The MSQ6111C is a quad red 7-segment LED display module manufactured by onsemi, featuring a 0.56" character size in a 12-DIP package configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The display operates as a common anode configuration with a forward voltage of 2.1V and test current of 20mA, suitable for numeric and alphanumeric display applications requiring standard LED brightness characteristics.

Substiute Parts

MSQ6111C

onsemiIn Stock: 1230MSQ6111C Datasheet

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LDQ-M514RI

Lumex Opto/Components Inc.In Stock: 869LDQ-M514RI Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the MSQ6111C is determined by the following critical parameters:

• Display Configuration: 4-character, 7-segment, common anode architecture
• Physical Package: 12-DIP form factor with matching dimensional envelope (0.56" character height)
• Electrical Compatibility: Forward voltage range and current specifications must support existing circuit designs
• Optical Characteristics: Red wavelength emission in the 630-700nm range
• Mechanical Fit: Overall dimensions and pin spacing must align with 12-DIP standard

The LDQ-M514RI from Lumex Opto/Components Inc. qualifies as a direct substitute based on matching display format, package type, character configuration, and common anode topology. Both parts operate within compatible electrical parameters and share identical physical mounting requirements.

Parameter Comparison

Engineering Selection Recommendations

The LDQ-M514RI represents a viable substitute for the obsolete MSQ6111C based on functional equivalence in display architecture and package compatibility. The substitute part maintains active product status, ensuring long-term availability and supply chain continuity.

Key considerations for selection:

• Electrical Parameters: The LDQ-M514RI operates at a lower forward voltage (2V vs. 2.1V) and reduced test current (10mA vs. 20mA), resulting in lower power dissipation. Existing circuit designs must accommodate these electrical differences through resistor value adjustments.
• Optical Output: The LDQ-M514RI provides higher brightness (3.9mcd vs. 0.7mcd) with a shorter peak wavelength (635nm vs. 697nm), producing a more orange-red appearance compared to the original part.
• Compliance Status: Both parts maintain MSL 1 rating and REACH Unaffected status. The LDQ-M514RI carries RoHS3 compliance, providing additional regulatory alignment for modern applications.
• Physical Compatibility: Dimensional variations are minimal (0.748" vs. 0.752" height; 1.980" vs. 1.988" width), ensuring PCB layout compatibility without modification.

Frequently Asked Questions (FAQ)

Q: Can the LDQ-M514RI be used as a direct pin-for-pin replacement for the MSQ6111C?

A: Yes. Both parts use 12-DIP package configuration with identical pin assignments for common anode 7-segment display operation. Physical dimensions are within tolerance for standard PCB footprints.

Q: What circuit modifications are required when substituting the LDQ-M514RI?

A: The lower forward voltage (2V vs. 2.1V) and reduced test current (10mA vs. 20mA) require recalculation of current-limiting resistor values. The higher brightness output (3.9mcd vs. 0.7mcd) may necessitate resistor adjustment to achieve desired display intensity. Wavelength differences (635nm vs. 697nm) will produce a visually different red tone.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts maintain MSL 1 and REACH Unaffected status. The LDQ-M514RI includes RoHS3 compliance certification, while the MSQ6111C does not specify this compliance. For applications requiring RoHS compliance, the LDQ-M514RI is the appropriate selection.

Q: What is the impact of the wavelength difference on display appearance?

A: The MSQ6111C emits at 697nm (deep red), while the LDQ-M514RI emits at 635nm (orange-red). This produces a perceptible color shift. Applications where color consistency is critical should evaluate this difference against design requirements.

Q: Is the LDQ-M514RI suitable for new designs?

A: Yes. The LDQ-M514RI carries active product status, ensuring availability for production and future supply. It is the recommended choice for new designs requiring quad red 7-segment display functionality in 12-DIP configuration.