PM3HT LED Panel Indicator Equivalent & Substitute Parts

Part Overview

The PM3HT is a panel-mounted LED indicator manufactured by Bivar Inc., featuring a red clear lens with 50mcd brightness rating. This part operates at 2V with a 30mA maximum current and is designed for 3mm T-1 lens format with a 0.16" (4.06mm) round panel cutout. The PM3HT is classified as obsolete, necessitating identification of suitable substitute components for system integration and maintenance applications.

Substiute Parts

PM3HT

Bivar Inc.In Stock: 1014PM3HT Datasheet

Current PartRFQ

PM3HD

Bivar Inc.In Stock: 1035PM3HD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

The PM3HD serves as a substitute for the PM3HT based on shared electrical and mechanical compatibility parameters. Both components belong to the Bivar PM3 series and maintain identical specifications for the following critical parameters:

• Voltage: 2V
• Current: 30mA
• Lamp Color: Red
• Wavelength - Peak: 625nm
• Lens Size: 3mm, T-1
• Lens Style: Round with Domed Top
• Panel Cutout Shape: Round
• Panel Cutout Dimensions: 0.16" (4.06mm)

Variations between the main part and substitute exist in lens transparency (Clear vs. Diffused), viewing angle (30° vs. 40°), and brightness rating (50mcd vs. 30mcd). These differences represent optical performance characteristics that do not affect mechanical mounting or electrical circuit compatibility, provided circuit design accommodates the brightness variation.

Parameter Comparison

Engineering Selection Recommendations

The PM3HD represents a direct substitute for the obsolete PM3HT, as it maintains active product status with Bivar Inc. and shares identical electrical circuit requirements (2V, 30mA) and mechanical mounting specifications. The substitute operates within the same environmental classification (MSL 1 - Unlimited) and maintains export compliance under the same ECCN designation (EAR99).

The PM3HD is RoHS3 compliant, providing enhanced regulatory alignment for applications subject to hazardous substance restrictions. The optical differences—diffused lens transparency versus clear, 40° viewing angle versus 30°, and 30mcd versus 50mcd brightness—constitute performance trade-offs that must be evaluated against specific application requirements. Applications requiring the exact 50mcd brightness output of the PM3HT should conduct validation testing with the PM3HD to confirm adequate visibility in target operating conditions.

Frequently Asked Questions (FAQ)

Q: Can PM3HD be used as a direct replacement for PM3HT? A: Yes, from an electrical and mechanical perspective. Both components feature identical voltage (2V), current (30mA), lens format (3mm T-1), and panel cutout dimensions (0.16"). The substitute features diffused lens optics with a broader 40° viewing angle and lower brightness (30mcd vs. 50mcd), which may affect visual perception in the application.

Q: What is the primary reason for finding substitutes for PM3HT? A: The PM3HT is classified as obsolete by the manufacturer. The PM3HD provides a continuity solution, maintaining circuit compatibility while offering active product availability and improved regulatory compliance (RoHS3).

Q: How do the optical characteristics differ? A: The PM3HT features a clear lens with narrow 30° viewing angle and 50mcd brightness. The PM3HD employs a diffused lens with wider 40° viewing angle and 30mcd brightness. The diffused lens distributes light over a broader field, while the clear lens concentrates light within a narrower cone.

Q: Are there compatibility issues with the panel cutout? A: No. Both parts utilize identical round panel cutout dimensions of 0.16" (4.06mm) and identical 3mm T-1 lens form factors, ensuring mechanical interchangeability without enclosure modification.

Q: What compliance certifications apply to both parts? A: Both PM3HT and PM3HD carry EAR99 export classification and MSL 1 (Unlimited) moisture sensitivity designation. The PM3HD additionally carries RoHS3 compliance certification, providing enhanced regulatory alignment for restricted substance applications.

Q: Does packaging differ between the parts? A: Packaging designation for PM3HT is not specified in standard documentation. PM3HD is supplied in bag packaging. Confirm packaging requirements with supplier documentation for bulk procurement applications.