Equivalent & Substitute Parts for 139A-404R

Part Overview

The 139A-404R is a red lens cap with panel mount threaded base manufactured by Visual Communications Company (VCC). This component is classified as an obsolete product, necessitating identification of active equivalent parts for continued system support and procurement. The lens cap features a round domed top design with diffused transparency, suitable for indicator light applications requiring red optical output. Due to obsolete status, substitute parts from active manufacturers ensure supply chain continuity and system compatibility.

Substiute Parts

139A-404R

Visual Communications Company - VCCIn Stock: 1158139A-404R Datasheet

Current PartRFQ

1280971003

DialightIn Stock: 7481280971003 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 139A-404R is determined by strict equivalence across the following critical parameters:

Primary Matching Criteria:

• Lens diameter: 14.68mm
• Mounting configuration: Panel mount with threaded base
• Lens color: Red
• Lens transparency: Diffused
• LED count: 1

Compliance Alignment:

• RoHS3 compliance maintained across all substitute parts
• Moisture sensitivity level: MSL 1 (Unlimited)
• REACH unaffected status preserved

The substitute part 1280971003 from Dialight meets all primary matching criteria. Minor variations in lens style geometry (stovepipe top versus domed top) remain within acceptable substitution parameters, as both configurations maintain identical optical aperture diameter and diffused light transmission characteristics required for panel-mounted indicator applications.

Parameter Comparison

Engineering Selection Recommendations

For 139A-404R Replacement:

The Dialight 1280971003 serves as the direct functional equivalent for applications currently using the VCC 139A-404R. Selection is based on:

1. Compliance Continuity: Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with existing procurement and environmental standards.

2. Active Product Status: The 1280971003 is classified as active, providing assured long-term availability and supply chain stability compared to the obsolete 139A-404R.

3. Optical and Mechanical Equivalence: Identical lens diameter (14.68mm), color (red), transparency (diffused), and mounting configuration (panel mount threaded base) ensure direct functional substitution in panel-mounted indicator circuits.

4. Lens Geometry Variation: The stovepipe top design of the 1280971003 maintains the same optical aperture and diffusion characteristics as the domed top of the 139A-404R, with no impact on light transmission or viewing characteristics in standard indicator applications.

Frequently Asked Questions (FAQ)

Q: Can the Dialight 1280971003 directly replace the VCC 139A-404R in existing assemblies?

A: Yes. Both parts share identical lens diameter (14.68mm), mounting type (panel mount threaded base), color (red), and diffused transparency. The lens style variation (stovepipe versus domed top) does not affect optical performance or mechanical fit in standard panel-mounted indicator applications.

Q: What is the significance of the obsolete status of the 139A-404R?

A: Obsolete status indicates the part is no longer manufactured by VCC and future availability cannot be assured. The 1280971003 is actively produced by Dialight, providing reliable long-term supply for new designs and replacement requirements.

Q: Are there compliance differences between the two parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity ratings. Compliance requirements are fully maintained in the substitution.

Q: Does packaging differ between these parts?

A: The 139A-404R is supplied with unspecified packaging, while the 1280971003 is supplied in bulk packaging. Packaging format does not affect component functionality or compatibility.

Q: What parameters must remain constant for substitution validity?

A: Lens diameter (14.68mm), mounting type (panel mount threaded base), color (red), lens transparency (diffused), and LED count (1) are the critical parameters determining substitution eligibility. All are matched between the 139A-404R and 1280971003.