PCH125-RLP LED Circuit Board Indicator Equivalent & Substitute Parts

Part Overview

The PCH125-RLP is a 3mm red LED circuit board indicator manufactured by Visual Communications Company (VCC). This component is designed for through-hole, right-angle mounting applications requiring a single red indicator with low current consumption (2mA) and a round domed lens. The PCH125-RLP is classified as obsolete, making identification of functionally equivalent substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain compatibility with the original mounting configuration, optical characteristics, and electrical performance parameters.

Substiute Parts

PCH125-RLP

Visual Communications Company - VCCIn Stock: 969PCH125-RLP Datasheet

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SSF-LXH103LID

Lumex Opto/Components Inc.In Stock: 28336SSF-LXH103LID Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the PCH125-RLP must satisfy the following core substitution criteria based on provided parameters:

Mandatory Compatibility Parameters:

• Lens Size: 3mm, T-1 (physical form factor match)
• Mounting Type: Through Hole, Right Angle (installation compatibility)
• Lens Style: Round with Domed Top (optical profile match)
• Color: Red (functional requirement)
• Wavelength - Peak: 635nm (color specification)
• Configuration: Single (circuit integration)
• RoHS Status: ROHS3 Compliant (regulatory compliance)

Allowable Parameter Variations:

• Current Rating: May exceed 2mA if circuit design accommodates higher current draw
• Millicandela Rating: May exceed 2.1mcd; higher brightness is functionally acceptable
• Viewing Angle: May exceed 50°; wider viewing angle is functionally acceptable
• Voltage Rating: May differ if circuit provides appropriate supply voltage
• Lens Type: May include diffusion or tinting if optical function is maintained

The substitute part SSF-LXH103LID meets all mandatory compatibility parameters while exceeding performance specifications in current, brightness, and viewing angle.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SSF-LXH103LID (Lumex Opto/Components Inc.)

The SSF-LXH103LID is the qualified substitute for the obsolete PCH125-RLP based on the following engineering criteria:

1. Form Factor Compatibility: Both components share identical 3mm T-1 lens size and through-hole right-angle mounting configuration, ensuring direct PCB footprint compatibility without layout modifications.

2. Optical Specification Match: Both components emit red light at 635nm peak wavelength with round domed lens style, maintaining consistent visual indication appearance and function.

3. Regulatory Compliance: Both components are ROHS3 compliant, satisfying environmental and regulatory requirements for equivalent component selection.

4. Performance Enhancement: The SSF-LXH103LID provides higher luminous intensity (40mcd vs. 2.1mcd) and wider viewing angle (60° vs. 50°), resulting in improved visibility without compromising functionality.

5. Production Status: The SSF-LXH103LID is in active production with substantial inventory availability (28,230 pcs), ensuring long-term supply continuity compared to the obsolete PCH125-RLP.

Circuit Design Consideration: The SSF-LXH103LID operates at 20mA rated current versus the PCH125-RLP at 2mA. Circuit designs must accommodate this higher current draw through appropriate current-limiting resistor selection or driver circuit configuration. The 2V voltage rating of the substitute must align with available circuit supply voltages.

Frequently Asked Questions (FAQ)

Q: Can the SSF-LXH103LID directly replace the PCH125-RLP without PCB modifications?

A: Yes, for mounting and form factor. Both components use 3mm T-1 through-hole right-angle configuration with identical lens style. However, circuit design must accommodate the higher 20mA current rating of the substitute through appropriate current-limiting resistor adjustment.

Q: What is the primary difference between these two components?

A: The PCH125-RLP operates at 2mA with 2.1mcd brightness, while the SSF-LXH103LID operates at 20mA with 40mcd brightness. The substitute provides 10× higher current consumption and approximately 19× higher luminous intensity. Both maintain identical optical wavelength (635nm) and physical form factor.

Q: Will the SSF-LXH103LID appear brighter than the original PCH125-RLP?

A: Yes. The SSF-LXH103LID has a millicandela rating of 40mcd compared to 2.1mcd for the PCH125-RLP. Additionally, the substitute includes diffused and tinted lens treatment, which may alter the visual appearance slightly while maintaining red color specification.

Q: Are there any compliance or certification differences?

A: Both components are ROHS3 compliant. The SSF-LXH103LID includes additional REACH Unaffected status documentation. Both share identical ECCN (EAR99) and HTSUS (8541.41.0000) classifications.

Q: What circuit modifications are required for substitution?

A: The primary modification involves current-limiting resistor recalculation. The original circuit designed for 2mA operation must be adjusted to accommodate 20mA operation of the substitute. The 2V voltage rating of the SSF-LXH103LID must be verified against available circuit supply voltage.

Q: Is the wider 60° viewing angle of the substitute a concern?

A: No. A wider viewing angle (60° vs. 50°) is functionally acceptable and typically beneficial for indicator applications, as it increases visibility from a broader range of viewing positions.

Q: What is the moisture sensitivity level difference?

A: The PCH125-RLP lists MSL as Not Applicable, while the SSF-LXH103LID specifies MSL 1 (Unlimited). This indicates the substitute has no moisture sensitivity restrictions during storage or handling.