P01-28C-1A Equivalent & Substitute Parts

Part Overview

The P01-28C-1A is an incandescent panel indicator manufactured by NKK Switches, designed for 28V applications with a red diffused lens and rectangular form factor. This component is classified as obsolete, making equivalent or substitute parts necessary for ongoing system maintenance, repairs, and new designs requiring similar functionality.

The primary reason for identifying substitute parts is the discontinuation of incandescent technology in favor of modern LED alternatives that offer improved reliability, lower power consumption, and extended operational life while maintaining compatible mechanical and electrical interfaces.

Substiute Parts

P01-28C-1A

NKK SwitchesIn Stock: 1057P01-28C-1A Datasheet

Current PartRFQ

UB204KW035C-3JC

NKK SwitchesIn Stock: 823UB204KW035C-3JC Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The UB204KW035C-3JC has been identified as a substitute for the P01-28C-1A based on the following substitution criteria:

Mechanical Compatibility:

• Both components feature diffused red lenses for visual indication
• Panel cutout dimensions are within acceptable tolerance (0.66" x 0.74" vs. 0.69" x 0.69")
• Both utilize flat-top lens styles suitable for flush panel mounting

Functional Compatibility:

• Both serve as panel-mounted indicator lights with red visual output
• Both maintain MSL 1 (Unlimited) moisture sensitivity rating
• Both comply with REACH regulations and carry EAR99 ECCN classification

Key Differences Requiring Evaluation:

• Technology transition from incandescent (28V, 22mA) to LED (1.85V, 30mA)
• Panel cutout shape change from rectangle to square
• Lens size reduction from 16.20mm x 16.00mm to 15.00mm diameter
• Voltage and current requirements differ significantly

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The P01-28C-1A is classified as obsolete, while the UB204KW035C-3JC is active and in production. For new designs and long-term system support, the active substitute part ensures continued availability and supply chain stability.

Compliance & Certifications: Both parts maintain identical REACH compliance status (REACH Unaffected) and ECCN classification (EAR99). The substitute part additionally carries ROHS3 compliance, meeting modern environmental and regulatory requirements.

Substitution Feasibility: Direct mechanical substitution requires panel cutout modification due to shape change (rectangle to square) and dimensional variance. The voltage and current requirement differences necessitate circuit redesign, including power supply adjustment and current-limiting resistor recalculation for the LED variant.

Frequently Asked Questions (FAQ)

Q: Can the UB204KW035C-3JC be used as a direct drop-in replacement for the P01-28C-1A?

A: No. While both components serve identical functional roles as red panel indicators, direct substitution requires mechanical and electrical modifications. The panel cutout must be enlarged and reshaped from rectangle to square, and the circuit must be redesigned to accommodate the 1.85V LED voltage requirement versus the original 28V incandescent specification.

Q: What are the primary mechanical compatibility concerns?

A: The panel cutout dimensions differ (0.66" x 0.74" vs. 0.69" x 0.69"), and the shape changes from rectangle to square. The lens size also decreases from 16.20mm x 16.00mm to 15.00mm. These differences require panel modification and potential bracket adjustment.

Q: How do the electrical requirements differ?

A: The P01-28C-1A operates at 28V with 22mA current draw, while the UB204KW035C-3JC requires 1.85V at 30mA. This significant voltage reduction necessitates circuit redesign, including power supply modification and current-limiting resistor recalculation.

Q: Are both parts compliant with current regulations?

A: Both parts maintain REACH compliance and EAR99 ECCN classification. The substitute part additionally meets ROHS3 environmental standards, making it suitable for applications with modern regulatory requirements.

Q: What is the inventory status of these parts?

A: The P01-28C-1A has 959 pieces in stock as new original inventory. The UB204KW035C-3JC has 779 pieces available in bulk packaging. Both are currently available for procurement.