NAR261B 7-Segment LED Display - Equivalent & Substitute Parts

Part Overview

The NAR261B is a 2-character red 7-segment LED display module manufactured by Stanley Electric Co., featuring a 0.60" digit height and common anode configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs, repairs, and production continuity. The display operates at 1.7V forward voltage with a 20mA test current and delivers 12mcd brightness at 660nm wavelength peak emission.

Substiute Parts

NAR261B

Stanley Electric CoIn Stock: 931NAR261B Datasheet

Current PartRFQ

LDD-A516RI

Lumex Opto/Components Inc.In Stock: 1244LDD-A516RI Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the NAR261B is determined by the following critical parameters:

Primary Compatibility Criteria:

• Display type: 7-Segment LED (required match)
• Number of characters: 2 (required match)
• Common pin configuration: Common Anode (required match)
• Color: Red (required match)
• Forward voltage: 1.7V (required match)
• Package: 18-DIP (required match)
• Wavelength peak: 660nm (required match)

Secondary Compatibility Parameters:

• Digit height: 0.60" nominal (minor variations acceptable within mechanical envelope)
• Physical dimensions: Compatible within 18-DIP footprint constraints
• Current rating: Variations permitted based on application requirements

The LDD-A516RI from Lumex Opto/Components Inc. meets all primary compatibility criteria and maintains functional equivalence within the specified electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

NAR261B (Stanley Electric Co.):

• Product status: Obsolete
• REACH Status: REACH Unaffected
• ECCN: EAR99
• Availability: 854 pcs in stock (legacy inventory)

LDD-A516RI (Lumex Opto/Components Inc.):

• Product status: Active
• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected
• ECCN: EAR99
• Availability: 1163 pcs in stock
• Packaging: Tube
• Moisture Sensitivity Level: 1 (Unlimited)

For new designs and production applications, the LDD-A516RI is the appropriate selection due to active product status and ROHS3 compliance. The substitute part maintains electrical equivalence with the obsolete NAR261B while offering improved regulatory compliance and current manufacturing support. Both components share identical 18-DIP package footprints and are suitable for direct PCB substitution.

Frequently Asked Questions (FAQ)

Q: Can the LDD-A516RI directly replace the NAR261B in existing circuit designs?

A: Yes. Both components share identical 18-DIP package pinouts, common anode configuration, 1.7V forward voltage, and 660nm wavelength specification. The LDD-A516RI operates at 10mA test current versus the NAR261B's 20mA, resulting in lower power consumption. Circuit designs must accommodate the reduced current requirement through appropriate current-limiting resistor adjustments.

Q: What is the significance of the digit height difference (0.60" vs 0.56")?

A: The 0.04" (0.38mm) height difference is within acceptable mechanical tolerance for 18-DIP display modules. Both components fit within the same physical envelope constraints. Visual appearance may show minor differences in character size, but functional display capability remains equivalent.

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

A: The LDD-A516RI carries ROHS3 compliance certification, while the NAR261B does not specify RoHS status. Both components are REACH Unaffected and classified as EAR99 for export control purposes. For applications requiring RoHS compliance, the LDD-A516RI is the appropriate selection.

Q: How do the power dissipation ratings affect component selection?

A: The LDD-A516RI specifies 100mW maximum power dissipation compared to the NAR261B's 60mW. This difference reflects the substitute's capability to handle higher power levels. In typical 20mA operation, actual dissipation remains within acceptable limits for both components.

Q: What packaging considerations apply to the LDD-A516RI?

A: The LDD-A516RI is supplied in tube packaging with Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling procedures for 18-DIP components apply.