DF3SRD LED Indicator Bar Equivalent & Substitute Parts

Part Overview

The DF3SRD is a red LED circuit board indicator bar manufactured by Kingbright, featuring a 19.90mm x 6.80mm rectangular lens with flat top design. This through-hole mounted component is configured as a single DIP bar indicator with diffused, tinted red optics. The DF3SRD is classified as obsolete product status, necessitating identification of active equivalent components for new designs and ongoing production requirements. Substitute parts must maintain mechanical compatibility, mounting characteristics, and core optical functionality while meeting current supply chain availability.

Substiute Parts

DF3SRD

KingbrightIn Stock: 1195DF3SRD Datasheet

Current PartRFQ

DF3SURKD

KingbrightIn Stock: 1246DF3SURKD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DF3SRD is determined by the following critical parameters:

Mechanical Compatibility Requirements:

• Lens size: 19.90mm x 6.80mm (exact match required)
• Lens style: Rectangle with Flat Top (exact match required)
• Mounting type: Through Hole (exact match required)
• Configuration: Bar - Single, DIP (exact match required)

Optical Compatibility Requirements:

• Color: Red spectrum
• Lens type: Diffused, Tinted (exact match required)

Electrical Operating Parameters:

• Voltage rating and current specifications must be evaluated within circuit design constraints
• Wavelength peak may vary within red spectrum range (645nm to 660nm acceptable)
• Millicandela rating variations are acceptable provided mechanical and optical parameters match

Regulatory & Compliance Requirements:

• RoHS3 Compliant status required
• REACH Unaffected status required
• MSL Rating 1 (Unlimited) required

The DF3SURKD meets all mechanical, optical, and regulatory criteria for substitution with the DF3SRD.

Parameter Comparison

Engineering Selection Recommendations

DF3SURKD as Primary Substitute for DF3SRD:

The DF3SURKD is the manufacturer-recommended substitute for the obsolete DF3SRD. Both components share identical mechanical form factors, mounting configurations, and regulatory compliance certifications. The DF3SURKD maintains active product status with current manufacturing and supply chain availability.

Electrical Parameter Considerations:

The DF3SURKD operates at 1.95V with 185mA current rating, compared to the DF3SRD specification of 1.85V at 30mA. Circuit designs utilizing the DF3SURKD must accommodate these electrical parameter differences through appropriate current-limiting resistor selection and power supply voltage compatibility verification. The DF3SURKD delivers 160mcd brightness versus the DF3SRD's 270mcd rating; optical intensity requirements must be evaluated within specific application contexts.

Compliance & Supply Chain:

Both components maintain ROHS3 Compliant and REACH Unaffected certifications. The DF3SURKD's active product status ensures long-term supply chain continuity and manufacturing support, eliminating obsolescence risk associated with the DF3SRD.

Frequently Asked Questions (FAQ)

Q: Can the DF3SURKD be used as a direct mechanical replacement for the DF3SRD?

A: Yes. Both components feature identical 19.90mm x 6.80mm rectangular lens dimensions, flat-top lens style, and through-hole mounting configuration. PCB footprints and mechanical mounting requirements are identical.

Q: What are the key electrical differences between DF3SRD and DF3SURKD?

A: The DF3SURKD operates at 1.95V with 185mA current rating, while the DF3SRD operates at 1.85V with 30mA current rating. Circuit designs must be evaluated to ensure power supply voltage compatibility and appropriate current-limiting resistor values for the DF3SURKD's higher current requirement.

Q: Does the wavelength difference (660nm vs. 645nm) affect substitution compatibility?

A: Both wavelengths fall within the red spectrum range. The 645nm wavelength of the DF3SURKD produces a slightly different red hue compared to the 660nm DF3SRD. Visual appearance in the final application should be evaluated if color consistency is critical.

Q: How does the brightness difference (270mcd vs. 160mcd) impact substitution?

A: The DF3SRD provides higher brightness at 270mcd compared to the DF3SURKD at 160mcd. Applications requiring specific minimum brightness levels must verify that 160mcd meets functional requirements. Conversely, applications with brightness constraints may benefit from the lower intensity of the DF3SURKD.

Q: Are both components RoHS and REACH compliant?

A: Yes. Both the DF3SRD and DF3SURKD are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: What is the packaging difference between these components?

A: The DF3SRD is supplied with standard packaging (indicated as "-"), while the DF3SURKD is supplied in Tube packaging. Procurement and handling procedures may differ accordingly.

Q: Why is the DF3SRD classified as obsolete?

A: The DF3SRD has reached end-of-life status in the manufacturer's product portfolio. The DF3SURKD represents the active equivalent component for ongoing production and new design applications.