CMW01H LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The CMW01H is a 3mm T-1 green circuit board indicator LED manufactured by Visual Communications Company (VCC). This component features a diffused lens with domed top, rated for 2.1V at 10mA operation, and is designed for through-hole right-angle mounting applications. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

CMW01H

Visual Communications Company - VCCIn Stock: 885CMW01H Datasheet

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LTL-533-11

Lite-On Inc.In Stock: 15755LTL-533-11 Datasheet

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WP934RS/GD

KingbrightIn Stock: 964WP934RS/GD Datasheet

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WP934ZH/GD

KingbrightIn Stock: 5827WP934ZH/GD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMW01H are identified based on strict alignment with the following critical parameters:

Primary Compatibility Criteria:

• Color: Green (565nm peak wavelength)
• Configuration: Single LED
• Lens Type: Diffused
• Lens Style: Round with Domed Top
• Mounting Type: Through Hole, Right Angle
• Voltage Rating: 2.1V nominal (2.2V acceptable within standard LED tolerance)
• RoHS3 Compliance: Required
• MSL Rating: 1 (Unlimited)

Substitution Logic: The CMW01H operates at 10mA with 2mcd output. Substitute parts may operate at higher current ratings (25mA, 30mA) and higher luminous intensity (30mcd, 40mcd) while maintaining the same voltage class and physical form factor. Circuit designs using the CMW01H can accommodate higher-performance alternatives through appropriate current-limiting resistor adjustment. Lens size variations (3mm T-1 versus 4.8mm) represent distinct mechanical form factors and are grouped separately.

Parameter Comparison

Engineering Selection Recommendations

Group 1: Direct Form Factor Substitutes (3mm T-1 Lens Size)

WP934RS/GD and WP934ZH/GD are mechanically and electrically compatible with CMW01H for applications requiring 3mm T-1 through-hole right-angle mounting. Both parts are manufactured by Kingbright and maintain active product status. The 0.1V voltage increase (2.2V versus 2.1V) falls within standard LED forward voltage tolerance ranges. Current rating increases from 10mA to 25mA require circuit resistor recalculation but do not prevent substitution. Both parts are ROHS3 compliant with MSL 1 rating.

Group 2: Alternate Form Factor Substitute (4.8mm Lens Size)

LTL-533-11 manufactured by Lite-On Inc. provides functional equivalence with modified mechanical form factor. The 4.8mm lens diameter differs from the 3mm T-1 standard, requiring PCB layout verification. This part maintains voltage compatibility (2.1V), ROHS3 compliance, and MSL 1 rating. Higher current (30mA) and luminous intensity (40mcd) necessitate circuit design adjustment. The 60° viewing angle provides wider light distribution compared to the CMW01H 50° specification.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage environments. WP934RS/GD and WP934ZH/GD are REACH Unaffected. LTL-533-11 is REACH Affected. All parts share ECCN EAR99 and HTSUS 8541.41.0000 classification with the original CMW01H.

Frequently Asked Questions (FAQ)

Q: Can WP934RS/GD or WP934ZH/GD directly replace CMW01H without circuit modification?

A: Both Kingbright parts maintain identical 3mm T-1 through-hole right-angle form factor and 2.1V/2.2V voltage compatibility. However, the current rating increase from 10mA to 25mA requires recalculation of the series current-limiting resistor to maintain proper LED operation. Direct physical substitution is possible; circuit adjustment is necessary.

Q: What is the difference between WP934RS/GD and WP934ZH/GD?

A: Both parts are identical in electrical and optical specifications. The difference lies in packaging designation and internal construction variant. Both are manufactured by Kingbright, share the same base product number WP934, and are functionally equivalent for circuit applications.

Q: Is LTL-533-11 suitable for PCB designs originally specified for CMW01H?

A: LTL-533-11 provides electrical compatibility but requires PCB layout verification due to the 4.8mm lens diameter versus 3mm T-1 standard. The larger lens size may not fit existing mounting holes or clearance envelopes. Mechanical compatibility must be confirmed before substitution.

Q: Why do substitute parts have higher millicandela ratings than CMW01H?

A: Substitute parts (WP934RS/GD, WP934ZH/GD at 30mcd; LTL-533-11 at 40mcd) represent higher-performance alternatives to the 2mcd CMW01H. Circuit designs can accommodate these higher-output LEDs through appropriate current-limiting resistor selection. The increased luminous intensity does not prevent substitution in applications where the original brightness is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. CMW01H, WP934RS/GD, WP934ZH/GD, and LTL-533-11 are all ROHS3 compliant. MSL ratings are uniformly 1 (Unlimited) across all parts, ensuring compatibility with standard manufacturing processes.

Q: What is the viewing angle difference between CMW01H and substitute parts?

A: CMW01H specifies 50° viewing angle. WP934RS/GD and WP934ZH/GD specify 40° (narrower distribution). LTL-533-11 specifies 60° (wider distribution). Viewing angle affects light distribution pattern but does not prevent electrical substitution. Application requirements determine whether angle variation is acceptable.