PM3BWT LED Panel Indicator Blue

Part Overview

The PM3BWT is a blue LED panel indicator manufactured by Bivar Inc., designed for applications requiring a 4V, 25mA panel-mounted indicator with 25 millicandela brightness at 430nm wavelength. This part is classified as obsolete product status. Finding equivalent substitute parts is necessary to maintain system functionality and ensure continued procurement of reliable components for new designs and maintenance applications.

Substiute Parts

PM3BWT

Bivar Inc.In Stock: 1103PM3BWT Datasheet

Current PartRFQ

PM3BWDW12.0

Bivar Inc.In Stock: 1730PM3BWDW12.0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PM3BWT is valid when the replacement part maintains compatibility across the following critical parameters:

• Electrical: Voltage (4V), Current (25mA maximum), and Wavelength (430nm peak)
• Mechanical: Panel cutout shape (round), Panel cutout dimensions (0.16" / 4.06mm), Lens size (3mm, T-1), and Lens style (Round with Domed Top)
• Optical: Lamp color (Blue) and Lens color (Blue)
• Environmental: Moisture Sensitivity Level (MSL 1 or better)

The substitute parts listed below satisfy these core compatibility requirements while accommodating variations in lens transparency and viewing angle that do not affect panel mounting or electrical integration.

Parameter Comparison

Engineering Selection Recommendations

PM3BWDW12.0 is the qualified substitute for the obsolete PM3BWT part. Both components are manufactured by Bivar Inc. within the PM3 series and maintain identical electrical specifications (4V, 25mA) and mechanical compatibility (0.16" panel cutout, 3mm T-1 lens form factor).

Selection of PM3BWDW12.0 is supported by:

• Active product status with current manufacturing support from Bivar Inc.
• Identical MSL 1 moisture sensitivity rating, suitable for unlimited dry storage conditions
• Full compatibility with PM3BWT panel mounting requirements (round 4.06mm cutout)
• Compliance with the same electrical standards and automotive/industrial certifications

Design considerations: PM3BWDW12.0 operates with a 40° viewing angle compared to PM3BWT's 30° viewing angle and features a diffused lens versus the original clear lens. The substitute part also supplies 10mcd brightness instead of 25mcd. These differences must be evaluated against application-specific visibility and light output requirements. The PM3BWDW12.0 includes pre-attached 12-inch wire leads, which may require lead trimming or removal depending on original solder connection design.

Frequently Asked Questions (FAQ)

Q: Can PM3BWDW12.0 replace PM3BWT in all applications?

A: PM3BWDW12.0 maintains full electrical and mechanical compatibility with PM3BWT. However, two optical differences require evaluation: the 10mcd brightness of PM3BWDW12.0 is lower than the original 25mcd rating, and the diffused lens changes light diffusion characteristics compared to the clear lens. Applications with specific brightness or light distribution requirements must be re-qualified.

Q: What is the significance of the different viewing angles (30° vs. 40°)?

A: Viewing angle defines the cone of light perception. PM3BWT operates within a 30° cone, while PM3BWDW12.0 extends to 40°. This difference may affect the perceived brightness and visibility profile when viewing the indicator from off-axis positions. High-visibility applications may benefit from the wider 40° angle.

Q: Why does PM3BWDW12.0 have lower millicandela rating?

A: The 10mcd rating of PM3BWDW12.0 is determined by the combination of the diffused lens and the specific LED die characteristics. Diffused lenses reduce peak brightness while distributing light more uniformly across the viewing angle. This is a standard design trade-off in LED indicator technology.

Q: What are the implications of the pre-attached 12-inch wire leads?

A: PM3BWDW12.0 includes 12-inch (304.80mm) pre-attached wire leads for direct soldering. The original PM3BWT part number does not specify termination style. If your design requires trimmed leads or a different lead length, leads may be cut to length during assembly. Ensure proper strain relief and solder joint durability after modification.

Q: Are both parts compliant with industry standards and regulations?

A: Both PM3BWT and PM3BWDW12.0 carry identical environmental classifications (MSL 1, ECCN EAR99, HTSUS 8541.41.0000). PM3BWDW12.0 has active RoHS3 compliance certification and REACH unaffected status, indicating current regulatory alignment for production use.

Q: Is PM3BWT still available for purchase?

A: PM3BWT is classified as obsolete. PM3BWDW12.0 is the active production alternative with confirmed inventory availability. Procurement should transition to PM3BWDW12.0 for new designs and long-term supply continuity.