PM3ATW12.0 Equivalent & Substitute Parts

Part Overview

The PM3ATW12.0 is a panel-mounted LED indicator manufactured by Bivar Inc., featuring an amber lamp with clear lens transparency and 12-inch wire leads. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement planning. The part operates at 2V with a maximum current of 30mA and provides 40 millicandela output at a 30° viewing angle.

Substiute Parts

PM3ATW12.0

Bivar Inc.In Stock: 771PM3ATW12.0 Datasheet

Current PartRFQ

PM3ADW12.0

Bivar Inc.In Stock: 1031PM3ADW12.0 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM3ATW12.0 is determined by strict alignment with the following critical parameters:

Mandatory Matching Parameters:

• Voltage: 2V
• Current: 30mA
• Lamp Color: Amber
• Lens Size: 3mm, T-1
• Panel Cutout Dimensions: 0.16" (4.06mm)
• Termination Style: Wire Leads - 12" (304.80mm)
• Wavelength - Peak: 605nm

Variable Parameters (Allowable Differences):

• Lens Transparency: Clear or Diffused
• Viewing Angle: 30° or 40°
• Millicandela Rating: 25mcd to 40mcd

The PM3ADW12.0 qualifies as a substitute based on matching all mandatory parameters while differing in lens transparency (Diffused vs. Clear) and viewing angle (40° vs. 30°), which are acceptable variations within the PM3 series design envelope.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: PM3ADW12.0

The PM3ADW12.0 is the qualified substitute for the obsolete PM3ATW12.0. Selection of this alternative 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 electronics.

2. Mechanical Compatibility: Panel cutout dimensions (0.16" / 4.06mm) and termination style (12-inch wire leads) are identical, enabling direct mechanical replacement in existing panel assemblies.

3. Optical Characteristics: While the PM3ADW12.0 features diffused lens transparency compared to the clear lens of the PM3ATW12.0, both maintain the same amber lamp color and 605nm peak wavelength. The diffused lens provides a wider viewing angle (40° vs. 30°), which expands the angular range for visual indication without compromising color perception.

4. Luminous Output: The PM3ADW12.0 provides 25mcd compared to the PM3ATW12.0's 40mcd. This reduction in brightness is a direct consequence of the diffused lens design and must be evaluated against application-specific visibility requirements.

5. Product Status and Compliance: The PM3ADW12.0 holds Active product status with RoHS3 compliance, ensuring ongoing availability and regulatory alignment for new designs and production continuity.

6. Supply Chain: The PM3ADW12.0 maintains higher inventory levels (996 pcs) compared to the PM3ATW12.0 (718 pcs), supporting procurement reliability.

Frequently Asked Questions (FAQ)

Q: Can the PM3ADW12.0 be used as a direct replacement for the PM3ATW12.0 in all applications?

A: The PM3ADW12.0 is electrically and mechanically compatible with the PM3ATW12.0. However, the diffused lens and reduced millicandela rating (25mcd vs. 40mcd) may affect visibility in applications requiring high brightness or directional light output. Applications with specific brightness or lens clarity requirements must evaluate the optical differences.

Q: What is the primary difference between the PM3ATW12.0 and PM3ADW12.0?

A: The main differences are lens transparency (Clear vs. Diffused), viewing angle (30° vs. 40°), and millicandela rating (40mcd vs. 25mcd). All electrical, mechanical, and spectral parameters remain identical.

Q: Why is the PM3ATW12.0 marked as obsolete?

A: The PM3ATW12.0 is classified as obsolete by the manufacturer. The PM3ADW12.0 serves as the active replacement within the PM3 series, offering equivalent functionality with improved availability.

Q: Does the diffused lens of the PM3ADW12.0 affect color perception?

A: No. Both parts maintain identical amber lamp color and 605nm peak wavelength. The diffused lens affects light distribution and brightness uniformity rather than color output.

Q: Are there any compliance or regulatory differences between these parts?

A: Both parts share identical ECCN (EAR99), HTSUS (8541.41.0000), and MSL (1 - Unlimited) classifications. The PM3ADW12.0 includes RoHS3 compliance certification, supporting regulatory requirements for new designs.

Q: What packaging differences exist between the main part and substitute?

A: The PM3ATW12.0 is supplied with standard packaging, while the PM3ADW12.0 is supplied in Bag packaging. This difference does not affect component functionality or performance.