LED RED T1-3/4 PANEL MOUNT 5101H1LC Equivalent & Substitute Parts

Part Overview

The 5101H1LC is a red LED panel indicator manufactured by Visual Communications Company (VCC) in the 5101H series. This component is designed for panel-mount applications with a T1-3/4 form factor and wire wrap termination. The part is classified as obsolete, making identification of equivalent substitute components necessary for ongoing system maintenance, repair, and new design implementations where legacy compatibility is required.

Substiute Parts

5101H1LC

Visual Communications Company - VCCIn Stock: 8995101H1LC Datasheet

Current PartRFQ

5591101001F

DialightIn Stock: 12075591101001F Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 5101H1LC is determined by the following critical parameters that must align between the main part and substitute components:

Mechanical Compatibility:

• Panel cutout shape: Round
• Panel cutout dimensions: 0.25" (6.35mm)
• Lens style: Round with domed top
• Form factor: T1-3/4

Electrical Compatibility:

• Forward voltage (Vf): 1.8V nominal (acceptable range: 1.7V to 1.8V)
• Maximum current (If): 7mA
• Wavelength - peak: 635nm (red spectrum)
• Lamp color: Red

Regulatory & Environmental:

• RoHS3 compliance required
• MSL rating: 1 (Unlimited)

The substitute part 5591101001F from Dialight meets these substitution criteria with compatible electrical ratings, identical panel cutout dimensions, and equivalent optical characteristics. The primary difference is the termination style (PC Pin versus Wire Wrap) and lens transparency (Diffused versus clear), which represent functional enhancements rather than incompatibilities.

Parameter Comparison

Engineering Selection Recommendations

The 5591101001F from Dialight serves as a direct electrical and mechanical substitute for the obsolete 5101H1LC. Selection of this substitute is supported by the following factors:

Electrical Equivalence: The substitute operates at 1.7V forward voltage compared to the original 1.8V, representing a 0.1V reduction within acceptable tolerance for red LED applications. Both components are rated for 7mA maximum current and operate at identical wavelength (635nm), ensuring functional equivalence in indicator applications.

Mechanical Compatibility: Both components feature identical 0.25" (6.35mm) round panel cutout dimensions and round domed lens style, enabling direct physical substitution in existing panel assemblies without mechanical modification.

Regulatory Compliance: Both the original and substitute components maintain ROHS3 compliance and MSL rating of 1 (Unlimited), satisfying environmental and moisture sensitivity requirements for industrial and commercial applications.

Product Status Advantage: The substitute part 5591101001F carries active product status with confirmed inventory availability (1131 pieces), whereas the original 5101H1LC is obsolete. This ensures long-term supply chain reliability for replacement and maintenance applications.

Termination Consideration: The substitute employs PC Pin termination instead of wire wrap. Integration into existing wire wrap assemblies requires termination method adaptation through standard interconnection techniques.

Frequently Asked Questions (FAQ)

Q: Can the 5591101001F directly replace the 5101H1LC without circuit modification?

A: The 5591101001F is electrically compatible with the 5101H1LC for standard indicator applications. The forward voltage difference (1.7V versus 1.8V) is within normal operating tolerance for red LED circuits. However, termination style differs (PC Pin versus Wire Wrap), requiring connection method adaptation.

Q: What is the significance of the diffused lens on the substitute part?

A: The 5591101001F features a diffused lens compared to the clear lens of the original 5101H1LC. Diffused lenses scatter light over a wider viewing angle (50° specified for the substitute), which may alter the visual appearance and brightness distribution in the application. Circuit brightness calculations should account for the 2.3mcd rating of the substitute versus the 2mcd rating of the original.

Q: Are both parts suitable for the same panel cutout dimensions?

A: Yes. Both the 5101H1LC and 5591101001F are designed for 0.25" (6.35mm) round panel cutouts. No mechanical modification to the panel assembly is required for physical installation.

Q: What compliance certifications apply to the substitute part?

A: The 5591101001F maintains ROHS3 compliance and carries MSL rating of 1 (Unlimited), matching the environmental and moisture sensitivity specifications of the original 5101H1LC.

Q: Is the substitute part currently available?

A: Yes. The 5591101001F is classified as an active product with confirmed inventory of 1131 pieces in stock, providing supply chain continuity for the obsolete 5101H1LC.

Q: How does the viewing angle specification affect substitution?

A: The substitute part specifies a 50° viewing angle, whereas the original part does not provide this specification. The diffused lens design of the substitute produces a wider light distribution pattern, which may be advantageous for applications requiring broader visibility but should be evaluated against specific application requirements.

Q: What termination method should be used to connect the PC Pin substitute to wire wrap circuits?

A: The PC Pin termination of the 5591101001F requires connection through standard PCB mounting or wire wrap adapter techniques. Direct wire wrap connection is not applicable; integration into existing wire wrap assemblies requires intermediate interconnection hardware or circuit board redesign.