PM5BWT LED Panel Indicator Equivalent & Substitute Parts

Part Overview

The PM5BWT is a panel-mounted LED indicator manufactured by Bivar Inc., featuring a blue clear lens with 430nm peak wavelength and 30mcd brightness rating. This component is classified as Obsolete product status, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs. The PM5BWT operates at 4V with 30mA maximum current and features a 0.25" (6.35mm) round panel cutout compatible with standard indicator panel installations.

Substiute Parts

PM5BWT

Bivar Inc.In Stock: 702PM5BWT Datasheet

Current PartRFQ

PM5BWD

Bivar Inc.In Stock: 1226PM5BWD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM5BWT is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Lamp Color: Blue
• Wavelength - Peak: 430nm
• Voltage (Vf Typ): 4V
• Panel Cutout Shape: Round
• Panel Cutout Dimensions: 0.25" (6.35mm)
• Lens Size: 5mm, T-1 3/4
• Lens Style: Round with Domed Top
• Series: PM5

Allowable Variation Parameters:

• Lens Transparency (Clear vs. Diffused)
• Millicandela Rating (brightness level)
• Viewing Angle
• Current (If Max)
• Termination Style
• Product Status (Active substitutes preferred for Obsolete parts)

The PM5BWD qualifies as a substitute based on matching all mandatory parameters while offering variations in lens transparency (Diffused vs. Clear), brightness (15mcd vs. 30mcd), viewing angle (45° vs. 20°), and current rating (25mA vs. 30mA).

Parameter Comparison

Engineering Selection Recommendations

PM5BWD Substitution Criteria:

The PM5BWD is the designated substitute for the obsolete PM5BWT based on the following engineering factors:

1. Product Status Alignment: PM5BWD holds Active product status, ensuring continued availability and manufacturing support, whereas PM5BWT is Obsolete and subject to discontinuation.

2. Regulatory Compliance: PM5BWD carries ROHS3 Compliant and REACH Unaffected certifications, meeting current environmental and regulatory requirements for component procurement in regulated industries.

3. Mechanical Compatibility: Both parts share identical panel mounting specifications (0.25" round cutout, 5mm T-1 3/4 lens form factor), enabling direct mechanical substitution without panel redesign.

4. Electrical Compatibility: Both parts operate at 4V nominal voltage with compatible current ratings (25mA vs. 30mA maximum), allowing operation within standard 4V indicator circuits with appropriate current-limiting resistor adjustment if required.

5. Optical Characteristics: Both parts emit 430nm peak wavelength blue light. The PM5BWD diffused lens provides 45° viewing angle versus the PM5BWT's 20° clear lens, with reduced brightness (15mcd vs. 30mcd). Selection depends on application visibility requirements and viewing angle constraints.

6. Termination Compatibility: PM5BWD features PC Pin termination, compatible with standard panel indicator wiring practices.

Frequently Asked Questions (FAQ)

Q: Can PM5BWD directly replace PM5BWT in existing designs?

A: Mechanical and electrical substitution is feasible. The PM5BWD fits the same 0.25" (6.35mm) round panel cutout and operates at the same 4V voltage. However, the reduced brightness (15mcd vs. 30mcd) and diffused lens (vs. clear) alter optical performance. Verify that the application's visibility requirements are satisfied with the PM5BWD's 45° viewing angle and lower brightness output.

Q: What is the primary difference between PM5BWT and PM5BWD?

A: The PM5BWT features a clear lens with 30mcd brightness and 20° viewing angle, while the PM5BWD features a diffused lens with 15mcd brightness and 45° viewing angle. The diffused lens provides wider light distribution at reduced intensity. Current ratings differ (30mA vs. 25mA maximum).

Q: Is the PM5BWD suitable for applications requiring 30mcd brightness?

A: No. The PM5BWD provides 15mcd brightness, which is 50% of the PM5BWT's 30mcd rating. Applications with specific brightness requirements must evaluate whether reduced output is acceptable or if alternative parts with higher brightness ratings are necessary.

Q: What are the compliance advantages of PM5BWD over PM5BWT?

A: PM5BWD is ROHS3 Compliant and REACH Unaffected, meeting current environmental regulations. PM5BWT compliance status is not specified. For procurement in regulated industries, PM5BWD provides documented regulatory alignment.

Q: Does the viewing angle difference affect substitution?

A: Yes. PM5BWD's 45° viewing angle is wider than PM5BWT's 20° viewing angle, resulting in broader light distribution but lower peak intensity in the direct viewing direction. Applications with narrow viewing angle requirements may experience reduced visibility with PM5BWD.

Q: Are the panel cutout dimensions identical?

A: Yes. Both parts use 0.25" (6.35mm) round panel cutouts with identical mechanical form factors (5mm, T-1 3/4 lens size, round domed top). No panel modification is required for mechanical substitution.

Q: What current adjustment is needed when substituting PM5BWD for PM5BWT?

A: PM5BWD maximum current is 25mA versus PM5BWT's 30mA. If the original circuit supplies 30mA, the PM5BWD will operate within specification at 25mA. Verify that the current-limiting resistor in the circuit accommodates the 25mA maximum rating to prevent component stress.

Q: Is PM5BWD available in the same packaging as PM5BWT?

A: PM5BWT packaging is listed as "-" (not specified). PM5BWD is supplied in Tray packaging. Confirm packaging compatibility with your procurement and assembly processes.

Q: Can I use PM5BWD in applications where the clear lens is critical?

A: No. PM5BWD features a diffused lens, which scatters light differently than the PM5BWT's clear lens. Applications requiring specific optical clarity or directional light output should not substitute the diffused lens variant.