Equivalent & Substitute Parts for 1051QCX4

Part Overview

The 1051QCX4 is a neon panel indicator manufactured by Visual Communications Company (VCC), designed for AC applications in the 208V to 250V range. This component features a white neon lamp with a white lens, round flat-top design, and quick connect termination (0.187" / 4.7mm). The part is classified as Obsolete, making identification of suitable alternatives essential for ongoing maintenance and system support. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and termination specifications to ensure direct compatibility in existing installations.

Substiute Parts

1051QCX4

Visual Communications Company - VCCIn Stock: 9941051QCX4 Datasheet

Current PartRFQ

1051QC4

Visual Communications Company - VCCIn Stock: 10681051QC4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1051QCX4 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility:

• Voltage rating: 208V ~ 250V AC
• Ratings classification: AC

Mechanical Compatibility:

• Panel cutout shape: Round
• Panel cutout dimensions: 0.50" (12.70mm)
• Lens style: Round with Flat Top
• Termination style: Quick Connect - 0.187" (4.7mm)

Functional Compatibility:

• Type: Neon
• Lamp color: White
• Lens color: White

Compliance & Environmental:

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part 1051QC4 meets all these criteria and is therefore classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

The 1051QC4 is a direct parametric equivalent to the 1051QCX4 across all electrical, mechanical, and functional specifications. Both parts are classified as discontinued products (Obsolete and Not For New Designs respectively), indicating that neither should be used in new system designs. However, for replacement and maintenance applications in existing installations, the 1051QC4 provides complete functional and mechanical compatibility.

Both parts maintain ROHS3 compliance and identical moisture sensitivity ratings, ensuring environmental and regulatory consistency. The primary distinction is packaging: the 1051QCX4 is supplied in standard packaging, while the 1051QC4 is supplied in bag packaging. This difference does not affect electrical or mechanical performance.

For applications requiring the 208V ~ 250V AC neon panel indicator with round 0.50" (12.70mm) cutout and quick connect termination, the 1051QC4 serves as a complete functional replacement.

Frequently Asked Questions (FAQ)

Q: Can the 1051QC4 be used as a direct replacement for the 1051QCX4?

A: Yes. The 1051QC4 is a parametric equivalent with identical voltage rating (208V ~ 250V AC), panel cutout dimensions (0.50" / 12.70mm), lens style (round with flat top), and termination type (quick connect 0.187" / 4.7mm). All electrical and mechanical specifications match exactly.

Q: What is the difference between the 1051QCX4 and 1051QC4?

A: The primary difference is packaging. The 1051QCX4 uses standard packaging, while the 1051QC4 uses bag packaging. All electrical, mechanical, and functional parameters are identical. Both parts are discontinued.

Q: Are both parts RoHS compliant?

A: Yes. Both the 1051QCX4 and 1051QC4 are ROHS3 compliant and have a Moisture Sensitivity Level of 1 (Unlimited).

Q: Why are both parts classified as discontinued?

A: The 1051QCX4 is classified as Obsolete, and the 1051QC4 is classified as Not For New Designs. Both designations indicate that these parts are no longer in active production and should not be specified for new system designs.

Q: What are the critical parameters for substitution?

A: Substitution requires matching: voltage rating (208V ~ 250V AC), panel cutout shape and dimensions (round, 0.50" / 12.70mm), lens style (round with flat top), termination type (quick connect 0.187" / 4.7mm), lamp color (white), and lens color (white).

Q: Can this neon indicator be used in DC applications?

A: No. Both the 1051QCX4 and 1051QC4 are rated for AC applications only. The voltage rating is specified as 208V ~ 250V AC.