Littelfuse M-458 Panel Indicator Dash Lamp - Equivalent & Substitute Parts

Part Overview

The Littelfuse M-458 is a panel indicator dash lamp featuring wire leads with 0.374" (9.5mm) termination, designed for dashboard and control panel applications. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing maintenance, repair, and new design implementations where equivalent functionality is required.

Substiute Parts

M-458

Littelfuse Inc.In Stock: 1020M-458 Datasheet

Current PartRFQ

DL-21-BX

Littelfuse Inc.In Stock: 1121DL-21-BX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M-458 is based on the following critical parameters:

• Termination Style: Wire leads with 0.374" (9.5mm) dimension
• Panel Cutout Configuration: Round cutout shape for direct mechanical fit
• Functional Category: Panel indicator dash lamp application
• Manufacturer Continuity: Littelfuse Inc. product line

The DL-21-BX qualifies as a manufacturer-recommended substitute based on matching termination methodology and panel indicator functionality within the Littelfuse product portfolio.

Parameter Comparison

Engineering Selection Recommendations

The DL-21-BX is the manufacturer-recommended substitute for the obsolete M-458. Selection of this active product ensures:

• Continued availability from Littelfuse Inc.
• Functional equivalence as a panel indicator dash lamp
• Maintained supply chain reliability for replacement and new applications
• Direct manufacturer support and technical documentation

For applications requiring the M-458, transition to the DL-21-BX is the supported path forward.

Frequently Asked Questions (FAQ)

Q: Why is the M-458 no longer available? A: The M-458 has reached end-of-life status and is classified as obsolete. The DL-21-BX represents the active equivalent within the Littelfuse product line.

Q: What are the critical compatibility factors for substitution? A: The primary compatibility factors are termination style (wire leads), panel cutout shape (round), and functional classification (panel indicator dash lamp). These parameters determine mechanical and electrical fit within the application.

Q: Is the DL-21-BX a direct mechanical replacement? A: The DL-21-BX is the manufacturer-recommended substitute. Verify panel cutout dimensions and termination specifications against your application requirements before implementation.

Q: Are there inventory considerations for the M-458? A: The M-458 has 939 pieces available as new original stock. However, as an obsolete product, future availability is not guaranteed. The DL-21-BX, with 1,097 pieces in stock and active product status, provides reliable long-term availability.

Q: What compliance information applies to these parts? A: The M-458 carries RoHS Not Applicable status with MSL 1 (Unlimited). Compliance details for the DL-21-BX should be verified with current Littelfuse documentation.