Equivalent & Substitute Parts for 5SRD-F Red LED T-1 3/4 Through Hole

Part Overview

The 5SRD-F is a red diffused LED indicator manufactured by Bivar Inc., designed for discrete red light indication applications in through-hole mounting configurations. This component features a 5mm T-1 3/4 lens form factor with a 40mcd brightness rating and 1.7V forward voltage specification. The 5SRD-F is classified as obsolete, necessitating identification of active substitute components that maintain functional compatibility within system designs. Substitute parts must preserve the mechanical form factor, mounting type, and core optical characteristics required for direct replacement in existing applications.

Substiute Parts

5SRD-F

Bivar Inc.In Stock: 10355SRD-F Datasheet

Current PartRFQ

5RD-F

Bivar Inc.In Stock: 8775RD-F Datasheet

SimilarRFQ

5HD-F

Bivar Inc.In Stock: 10145HD-F Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 5SRD-F are identified based on strict alignment with mechanical and optical parameters that determine physical and functional interchangeability. The substitution criteria are:

Mandatory Matching Parameters:

• Lens Size: 5mm, T-1 3/4
• Mounting Type: Through Hole
• Package / Case: Radial
• Height (Max): 8.60mm
• Lens Transparency: Diffused
• Color: Red
• Lens Style: Round with Domed Top
• Viewing Angle: 40°
• Current - Test: 20mA
• Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

• Voltage - Forward (Vf): Tolerance range determined by circuit design
• Millicandela Rating: Brightness variation acceptable within application requirements
• Wavelength - Peak: Red spectrum variation (625nm to 700nm) acceptable for red indication
• Product Status: Active status preferred for long-term availability

Both identified substitutes (5RD-F and 5HD-F) satisfy all mandatory mechanical and optical parameters. Electrical and optical performance variations fall within acceptable ranges for red LED indication applications.

Parameter Comparison

Engineering Selection Recommendations

5HD-F as Primary Substitute: The 5HD-F is the preferred substitute for the obsolete 5SRD-F. This component maintains identical mechanical dimensions (8.60mm height, 5mm T-1 3/4 lens), identical optical characteristics (40mcd brightness, 40° viewing angle, diffused red lens), and identical electrical test current (20mA). The forward voltage specification of 2V represents a 0.3V increase from the original 1.7V, which is within acceptable tolerance for standard LED circuit designs. The 5HD-F carries active product status and ROHS3 compliance certification, ensuring long-term availability and regulatory conformance. The wavelength shift from 645nm to 625nm remains within the red spectrum and is imperceptible in red indication applications.

5RD-F as Secondary Substitute: The 5RD-F maintains all mandatory mechanical and optical parameters but exhibits significant brightness reduction (1.5mcd versus 40mcd). This component is suitable only for applications where reduced brightness is acceptable or beneficial. The forward voltage of 2.1V and peak wavelength of 700nm are within acceptable ranges. The 5RD-F carries active product status and ROHS3 compliance. Selection of this component requires confirmation that the 1.5mcd brightness level meets application requirements.

Compliance Considerations: Both substitute parts are ROHS3 compliant, supporting regulatory requirements for new designs and manufacturing operations. The MSL rating of 1 (Unlimited) for all components indicates no moisture sensitivity restrictions during storage or handling.

Frequently Asked Questions (FAQ)

Q: Can the 5RD-F directly replace the 5SRD-F in all applications?

A: The 5RD-F matches all mechanical and optical form factor requirements but provides only 1.5mcd brightness compared to the original 40mcd specification. Direct replacement is possible only in applications where reduced brightness is acceptable. Verify brightness requirements before substitution.

Q: What is the impact of forward voltage differences between the 5SRD-F (1.7V) and substitute parts?

A: The 5HD-F operates at 2V and the 5RD-F at 2.1V, representing increases of 0.3V and 0.4V respectively. These variations are within standard tolerance for LED circuit designs using current-limiting resistors. Existing series resistor values may require adjustment to maintain the 20mA test current specification. Verify circuit design compatibility before implementation.

Q: Are the substitute parts physically compatible with existing PCB layouts designed for the 5SRD-F?

A: Yes. Both the 5HD-F and 5RD-F maintain identical mechanical specifications: 5mm T-1 3/4 lens size, 8.60mm maximum height, radial through-hole package, and round domed top lens style. No PCB layout modifications are required for mechanical compatibility.

Q: What is the wavelength difference between the main part and substitutes?

A: The 5SRD-F operates at 645nm peak wavelength. The 5HD-F operates at 625nm and the 5RD-F at 700nm. All three wavelengths fall within the red spectrum (620nm to 750nm range). The wavelength variations are not visually distinguishable in red indication applications and do not affect functional performance.

Q: Which substitute part should be selected for new designs?

A: The 5HD-F is recommended for new designs. It provides identical brightness (40mcd) and optical performance to the original 5SRD-F while offering active product status, ROHS3 compliance, and confirmed long-term availability. The 5RD-F should be selected only when reduced brightness (1.5mcd) is a design requirement.

Q: Are there any environmental or storage differences between the main part and substitutes?

A: No. All three components carry identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture sensitivity restrictions. Storage and handling requirements are identical across all components.

Q: What certifications apply to the substitute parts?

A: Both substitute parts (5HD-F and 5RD-F) are ROHS3 compliant. Both carry ECCN classification EAR99 and HTSUS code 8541.41.0000, matching the regulatory classification of the original 5SRD-F component.