Bivar Inc. 1.8RC LED Red Clear 1.8MM Through Hole - Equivalent & Substitute Parts

Part Overview

The Bivar Inc. 1.8RC is a red LED indication component designed for through-hole mounting applications. This discrete 2.1V radial LED features a clear, domed lens with 1.80mm diameter and delivers 2.5mcd at 20mA test current. The product is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure supply chain availability for new production and maintenance applications.

Substiute Parts

1.8RC

Bivar Inc.In Stock: 12081.8RC Datasheet

Current PartRFQ

1.8RD

Bivar Inc.In Stock: 11031.8RD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1.8RC is determined by strict adherence to the following critical parameters:

Critical Parameters (Must Match):

• Color: Red
• Lens Size: 1.80mm Dia
• Voltage - Forward (Vf) Typical: 2.1V
• Current - Test: 20mA
• Mounting Type: Through Hole
• Wavelength - Peak: 700nm
• Package / Case: Radial

Allowable Variation Parameters:

• Millicandela Rating: Substitute may differ within application tolerance
• Viewing Angle: Substitute may differ based on lens design
• Lens Transparency: Substitute may have different optical treatment (clear, diffused, tinted)
• Height (Max): Substitute may vary within PCB clearance constraints
• Product Status: Substitute must be Active or current production

The 1.8RD meets all critical parameter requirements while maintaining Bivar Inc. manufacturer consistency and active product status. The primary differences are lens transparency (diffused vs. clear), brightness (2mcd vs. 2.5mcd), viewing angle (50° vs. 35°), and height (3.00mm vs. 3.50mm).

Parameter Comparison

Engineering Selection Recommendations

The 1.8RD is a direct functional substitute for the obsolete 1.8RC based on matching critical electrical and mechanical parameters. Selection of the 1.8RD is supported by the following engineering factors:

Product Status: The 1.8RD maintains active production status with Bivar Inc., ensuring long-term supply chain availability and manufacturing consistency compared to the obsolete 1.8RC.

Compliance: The 1.8RD is ROHS3 compliant, meeting current environmental and regulatory requirements for new product designs and manufacturing processes.

Electrical Compatibility: Forward voltage (2.1V) and test current (20mA) are identical, ensuring direct circuit compatibility without modification to existing driver circuits or current-limiting resistor calculations.

Mechanical Compatibility: Identical lens size (1.80mm), mounting type (through hole), and radial package configuration ensure PCB footprint and assembly process compatibility. The reduced maximum height (3.00mm vs. 3.50mm) provides improved clearance margins.

Optical Considerations: The 1.8RD features diffused lens transparency and a wider viewing angle (50° vs. 35°), resulting in broader light distribution. The brightness reduction (2mcd vs. 2.5mcd) is a consequence of the diffused lens design. Applications requiring the original clear lens and narrow viewing angle characteristics should evaluate this optical difference against specific design requirements.

Frequently Asked Questions (FAQ)

Q: Can the 1.8RD be used as a direct replacement for the 1.8RC without circuit modification?

A: Yes. The 1.8RD maintains identical forward voltage (2.1V) and test current (20mA) specifications, eliminating the need for circuit redesign or resistor recalculation. The radial through-hole package and 1.80mm lens size ensure PCB footprint compatibility.

Q: What is the primary difference between the 1.8RC and 1.8RD?

A: The primary difference is lens transparency. The 1.8RC features a clear lens with 35° viewing angle and 2.5mcd brightness. The 1.8RD features a diffused lens with 50° viewing angle and 2mcd brightness. The diffused design produces wider light distribution at the cost of reduced peak brightness.

Q: Does the height difference (3.50mm vs. 3.00mm) affect PCB assembly?

A: The 1.8RD's reduced maximum height of 3.00mm provides improved clearance margins compared to the 1.8RC's 3.50mm specification. This reduction is beneficial for applications with tight vertical space constraints and does not negatively impact assembly compatibility.

Q: Is the 1.8RD suitable for applications requiring high brightness?

A: The 1.8RD delivers 2mcd compared to the 1.8RC's 2.5mcd. Applications with strict brightness requirements should evaluate whether the 0.5mcd reduction is acceptable. The diffused lens design distributes light over a wider angle, which may compensate for reduced peak brightness in certain viewing geometries.

Q: Are there any environmental or compliance differences between the two parts?

A: The 1.8RD is ROHS3 compliant, meeting current environmental standards. Both parts share identical moisture sensitivity level (MSL 1 - Unlimited) and ECCN/HTSUS classifications.

Q: What is the wavelength specification for both parts?

A: Both the 1.8RC and 1.8RD have a peak wavelength of 700nm, confirming identical red LED optical characteristics and color consistency.