LED Panel Indicator PM3HTW12.0 Equivalent & Substitute Parts

Part Overview

The PM3HTW12.0 is a red LED panel indicator manufactured by Bivar Inc., designed for applications requiring a 2V, 30mA panel-mounted indicator with 12-inch wire leads. This component features a clear lens with 30° viewing angle and 50mcd brightness rating at 625nm wavelength.

The PM3HTW12.0 is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades where this indicator is specified.

Substiute Parts

PM3HTW12.0

Bivar Inc.In Stock: 1087PM3HTW12.0 Datasheet

Current PartRFQ

PM3HDW12.0

Bivar Inc.In Stock: 890PM3HDW12.0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM3HTW12.0 is determined by strict compliance with the following mandatory parameters:

Electrical Parameters (Non-negotiable):

• Forward voltage (Vf): 2V
• Maximum current (If): 30mA

Optical Parameters (Non-negotiable):

• Lamp color: Red
• Peak wavelength: 625nm

Mechanical Parameters (Non-negotiable):

• Lens size: 3mm, T-1
• Panel cutout shape: Round
• Panel cutout dimensions: 0.16" (4.06mm)
• Termination style: Wire leads with 12-inch length
• Lens style: Round with domed top

Variable Parameters (Allowed to differ):

• Lens transparency (clear vs. diffused)
• Viewing angle
• Millicandela rating
• Product status (obsolete vs. active)
• Packaging format

The PM3HDW12.0 qualifies as a substitute because it maintains all mandatory electrical, optical, and mechanical parameters while differing only in allowed variable parameters.

Parameter Comparison

Engineering Selection Recommendations

PM3HDW12.0 as Primary Substitute:

The PM3HDW12.0 is the direct substitute for the obsolete PM3HTW12.0. Selection of this substitute is based on the following engineering criteria:

1. Electrical Compatibility: Both parts operate at identical voltage (2V) and current (30mA) specifications, ensuring direct circuit compatibility without modification to drive circuitry or power supply design.

2. Mechanical Compatibility: Identical lens size (3mm, T-1), panel cutout dimensions (0.16"/4.06mm), and wire lead length (12 inches) ensure direct mechanical interchangeability in existing panel designs and PCB layouts.

3. Optical Compatibility: Identical lamp color (red) and peak wavelength (625nm) maintain color consistency and spectral characteristics across production batches.

4. Product Status Advantage: The PM3HDW12.0 is classified as active, ensuring long-term availability and continued manufacturing support, unlike the obsolete PM3HTW12.0.

5. Compliance Status: The PM3HDW12.0 carries ROHS3 compliance certification, meeting current environmental and regulatory requirements for new designs and production.

Optical Characteristic Differences:

The PM3HDW12.0 features a diffused lens compared to the clear lens of PM3HTW12.0. This results in:

• Wider viewing angle (40° vs. 30°)
• Lower peak brightness (30mcd vs. 50mcd)

These differences are acceptable in applications where indicator visibility across a wider viewing angle is beneficial or where peak brightness is not a critical design constraint. Applications requiring the specific 50mcd brightness or 30° viewing angle of the original part should be evaluated for tolerance to these optical changes.

Frequently Asked Questions (FAQ)

Q1: Can PM3HDW12.0 be used as a direct replacement for PM3HTW12.0 in existing designs?

A: Yes. The PM3HDW12.0 maintains all mandatory electrical and mechanical parameters. Direct substitution is possible without circuit modification or panel redesign. The diffused lens and wider viewing angle represent the only functional differences.

Q2: What is the difference between the clear lens (PM3HTW12.0) and diffused lens (PM3HDW12.0)?

A: The clear lens provides a narrower, more focused light beam (30° viewing angle) with higher peak brightness (50mcd). The diffused lens spreads light over a wider area (40° viewing angle) with lower peak brightness (30mcd). Selection depends on application requirements for viewing angle and brightness intensity.

Q3: Are there any electrical differences between these parts?

A: No. Both parts operate at 2V forward voltage and 30mA maximum current. They are electrically identical and require no circuit modifications for substitution.

Q4: Why is PM3HDW12.0 preferred over PM3HTW12.0?

A: The PM3HDW12.0 is classified as active with current manufacturing support, while PM3HTW12.0 is obsolete. For new production and long-term availability, PM3HDW12.0 is the recommended choice. Additionally, PM3HDW12.0 carries ROHS3 compliance certification.

Q5: Will the panel cutout need to be modified?

A: No. Both parts use identical round panel cutouts of 0.16" (4.06mm) diameter. Existing panel designs require no mechanical modification.

Q6: Are the wire leads identical?

A: Yes. Both parts feature 12-inch (304.80mm) wire leads with identical termination style, ensuring direct compatibility with existing wiring and connector designs.

Q7: What is the moisture sensitivity level for these parts?

A: Both parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage, handling, or assembly.

Q8: Are there packaging differences?

A: The PM3HTW12.0 packaging format is not specified in the data. The PM3HDW12.0 is supplied in bag packaging. Confirm packaging requirements with procurement specifications.