Equivalent & Substitute Parts for 1031QD4 Neon Panel Indicator

Part Overview

The 1031QD4 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. The part is classified as "Not For New Designs," indicating it is a legacy component. Identifying equivalent substitute parts is essential for maintaining existing equipment, supporting field replacements, and ensuring design continuity in applications where this indicator is currently deployed.

Substiute Parts

1031QD4

Visual Communications Company - VCCIn Stock: 10181031QD4 Datasheet

Current PartRFQ

1051QC4

Visual Communications Company - VCCIn Stock: 10681051QC4 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1031QD4 are identified based on strict electrical and mechanical parameter matching. The substitution logic is based on the following critical parameters:

Electrical Parameters:

• Voltage rating: 208V ~ 250V AC (must match exactly)
• Ratings classification: AC operation (must match)
• Lamp type: Neon (must match)

Mechanical Parameters:

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

Compliance Parameters:

• RoHS3 Compliant status (must match)
• REACH Unaffected status (must match)
• MSL Rating 1 (must match)

The 1051QC4 meets all critical electrical, mechanical, and compliance parameters and is therefore classified as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

The 1051QC4 is a direct parametric equivalent to the 1031QD4 for applications requiring a neon panel indicator with 208V to 250V AC operation. Both parts are manufactured by VCC and share identical electrical specifications, mechanical dimensions, and compliance certifications.

Selection Basis:

Both the 1031QD4 and 1051QC4 carry "Not For New Designs" status, indicating they are legacy components. For existing equipment maintenance and field replacement applications, either part is suitable based on availability and inventory status. The 1051QC4 currently has higher inventory availability (1054 Pcs) compared to the 1031QD4 (971 Pcs).

Both parts maintain ROHS3 compliance and REACH Unaffected status, satisfying regulatory requirements for current applications. The MSL Rating of 1 (Unlimited) indicates no moisture sensitivity constraints during storage or handling.

Selection between these two equivalent parts should be based on:

• Inventory availability at the time of procurement
• Lead time requirements
• Cost considerations
• Existing supply chain relationships

No additional testing or verification is required when substituting between these parametrically equivalent parts in existing applications.

Frequently Asked Questions (FAQ)

Q: Can the 1051QC4 be used as a direct replacement for the 1031QD4?

A: Yes. The 1051QC4 is a parametric equivalent substitute. All critical electrical parameters (208V ~ 250V AC, neon type), mechanical parameters (round 0.50" cutout, quick connect termination, round flat-top lens), and compliance certifications (ROHS3, REACH Unaffected) are identical.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: lamp type (neon), lamp and lens color (white), voltage rating (208V ~ 250V AC), lens style (round with flat top), panel cutout shape and dimensions (round, 0.50"), termination style (quick connect 0.187"), and compliance status (ROHS3, REACH Unaffected).

Q: Are there any differences between the 1031QD4 and 1051QC4?

A: The parts differ only in manufacturer series designation (1031QD vs. 1051QC) and HTSUS classification codes. All functional, electrical, mechanical, and compliance parameters are identical.

Q: What is the panel cutout requirement for installation?

A: Both parts require a round panel cutout of 0.50" (12.70mm) diameter. The quick connect termination uses 0.187" (4.7mm) spade connectors.

Q: Are these parts suitable for new designs?

A: Both the 1031QD4 and 1051QC4 are classified as "Not For New Designs." They are intended for maintenance, repair, and replacement of existing equipment only.

Q: What is the voltage operating range?

A: Both parts operate on AC voltage in the range of 208V to 250V. They are not suitable for DC applications or voltages outside this range.

Q: What packaging format is used?

A: Both parts are supplied in bag packaging.

Q: Are there any moisture sensitivity concerns?

A: No. Both parts have an MSL Rating of 1 (Unlimited), indicating no moisture sensitivity constraints during storage or handling.