Adafruit 1816 LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The Adafruit 1816 is a 10-segment LED circuit board indicator bar featuring white LEDs in a through-hole DIP configuration. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The part operates at 3.2V with a 25mA current rating and features a 5.00mm x 1.74mm rectangular lens with flat top design, delivering 30mcd brightness output.

Substiute Parts

1816

Adafruit Industries LLCIn Stock: 33421816 Datasheet

Current PartRFQ

XGCBDX10D

SunLEDIn Stock: 1903XGCBDX10D Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Adafruit 1816 is determined by the following critical parameters:

• Configuration: Bar - 10 Wide, DIP format (non-negotiable for PCB layout compatibility)
• Mounting Type: Through Hole (mechanical fit requirement)
• Lens Style: Rectangle with Flat Top (visual and mechanical envelope)
• Lens Size: Nominal dimensions 5.00mm x 1.74mm (footprint compatibility)
• Voltage Rating: 3.2V nominal operation (circuit compatibility)
• Current Rating: 25mA nominal draw (power supply compatibility)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)

The SunLED XGCBDX10D meets these substitution criteria with minor parameter variations within acceptable engineering tolerances for this component category.

Parameter Comparison

Engineering Selection Recommendations

The SunLED XGCBDX10D serves as an active substitute for the obsolete Adafruit 1816. Both components maintain identical DIP bar configuration and through-hole mounting compatibility. The XGCBDX10D is currently in active production status, ensuring supply chain continuity.

Key considerations for selection:

• Voltage Compatibility: The XGCBDX10D operates at 3V versus the original 3.2V specification. This 0.2V differential is within standard circuit tolerance for LED indicator applications.
• Current Rating: The substitute draws 30mA compared to 25mA, requiring verification that power supply capacity accommodates the 5mA increase per segment.
• Brightness Output: The XGCBDX10D delivers 9.4mcd versus 30mcd on the original part. This represents a significant reduction in luminous intensity and may impact visibility in high-ambient-light environments.
• Color Difference: The substitute features blue LEDs instead of white. This color change requires circuit board layout and user interface design review.
• Physical Dimensions: Lens dimensions vary by 0.08mm in length and 0.04mm in height. These minor differences remain within standard PCB footprint tolerances for through-hole components.
• Regulatory Compliance: Both components maintain ROHS3 compliance, satisfying environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the SunLED XGCBDX10D be used as a direct drop-in replacement for the Adafruit 1816?

A: The SunLED XGCBDX10D shares identical DIP bar configuration and through-hole mounting, enabling physical installation in the same PCB footprint. However, the color change from white to blue and reduced brightness output (9.4mcd versus 30mcd) require functional validation in your specific application context.

Q: What is the impact of the voltage rating difference (3.2V versus 3V)?

A: The 0.2V difference falls within standard operating tolerance for LED indicator circuits. Existing current-limiting resistor values will function with the substitute, though brightness output will be affected by the combined influence of lower voltage and reduced millicandela rating.

Q: Does the increased current draw (30mA versus 25mA) affect circuit design?

A: The 5mA per-segment increase must be evaluated against your power supply capacity and total circuit current budget. Verify that the power supply and current-limiting resistor network can accommodate the higher draw without exceeding design limits.

Q: Are the physical dimension differences (5.08mm x 1.78mm versus 5.00mm x 1.74mm) significant?

A: The variations of 0.08mm in length and 0.04mm in height remain within standard through-hole component tolerances and do not affect PCB footprint compatibility or mechanical fit.

Q: What certifications apply to both components?

A: Both the Adafruit 1816 and SunLED XGCBDX10D maintain ROHS3 compliance. The SunLED component additionally carries MSL 1 (Unlimited) moisture sensitivity rating and REACH Unaffected status.