Equivalent & Substitute Parts for CMD383UBC Blue LED T-1 3/4 Through Hole

Part Overview

The CMD383UBC is a blue LED indication component manufactured by Visual Communications Company (VCC) in a T-1 3/4 through-hole radial package. This part is classified as obsolete, which necessitates identification of equivalent substitute components for ongoing design requirements and production continuity. The CMD383UBC features a 5mm lens with clear transparency, 800mcd brightness rating, and 3.8V forward voltage specification suitable for discrete indication applications.

Substiute Parts

CMD383UBC

Visual Communications Company - VCCIn Stock: 963CMD383UBC Datasheet

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HLMP-KB45-A0000

Broadcom LimitedIn Stock: 14544HLMP-KB45-A0000 Datasheet

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LTL2T3TBK5

Lite-On Inc.In Stock: 60223LTL2T3TBK5 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMD383UBC are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Color: Blue
• Lens Transparency: Clear
• Mounting Type: Through Hole
• Package Configuration: Radial
• Current - Test: 20mA
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)

Secondary Compatibility Parameters:

• Lens Size: T-1 3/4 (5mm) preferred for mechanical fit
• Voltage - Forward (Vf): Range 3.2V to 3.8V acceptable for standard logic-level circuits
• Millicandela Rating: 30mcd to 1200mcd range suitable for indication applications
• Viewing Angle: 12° to 40° acceptable depending on application requirements
• Wavelength - Peak: 430nm to 470nm within blue spectrum range

Two substitute parts meet the established criteria for functional and mechanical compatibility with the CMD383UBC.

Parameter Comparison

Engineering Selection Recommendations

LTL2T3TBK5 (Lite-On Inc.) - Primary Substitute

The LTL2T3TBK5 is the preferred substitute for CMD383UBC applications. This part maintains identical mechanical compatibility with T-1 3/4 (5mm) lens size and radial through-hole mounting. The forward voltage of 3.5V is within acceptable tolerance of the original 3.8V specification for standard logic-level circuits. The 1200mcd brightness rating exceeds the original 800mcd specification, providing enhanced visibility margin. The part is currently in active production status with 60,200 units in stock inventory. Full ROHS3 compliance and REACH unaffected status maintain regulatory alignment with the original component.

HLMP-KB45-A0000 (Broadcom Limited) - Secondary Substitute

The HLMP-KB45-A0000 serves as an alternative substitute where mechanical space constraints permit use of a smaller T-1 (3mm) lens package. This part features a lower forward voltage of 3.2V and reduced millicandela rating of 30mcd, making it suitable for applications with less stringent brightness requirements or where current-limiting resistor values can be adjusted. The wider 40° viewing angle provides broader light distribution compared to the original 12° specification. This part is in active production with 14,495 units in stock inventory and maintains full ROHS3 compliance.

Both substitute parts satisfy regulatory compliance requirements (ROHS3 Compliant, REACH Unaffected, EAR99 ECCN classification) and moisture sensitivity specifications (MSL 1 - Unlimited) equivalent to the original CMD383UBC component.

Frequently Asked Questions (FAQ)

Q: Can the LTL2T3TBK5 be used as a direct replacement for CMD383UBC in existing PCB designs?

A: Yes. The LTL2T3TBK5 maintains identical T-1 3/4 (5mm) lens size, radial through-hole mounting configuration, and maximum height of 8.70mm compared to the original 8.61mm. Pin spacing and mechanical footprint are compatible. The 3.5V forward voltage is within acceptable operating range for standard logic-level circuits designed for the original 3.8V specification.

Q: What are the brightness differences between the substitute parts and the original CMD383UBC?

A: The CMD383UBC provides 800mcd brightness. The LTL2T3TBK5 substitute provides 1200mcd, representing a 50% increase in brightness. The HLMP-KB45-A0000 provides 30mcd, representing a 96% decrease in brightness. Brightness selection depends on application requirements for indication visibility.

Q: Are there viewing angle differences that affect application suitability?

A: Yes. The CMD383UBC features a 12° viewing angle, providing narrow-beam indication. The LTL2T3TBK5 substitute provides 30° viewing angle, and the HLMP-KB45-A0000 provides 40° viewing angle. Wider viewing angles distribute light over a larger area, affecting visibility from different observation angles. Application requirements determine whether the narrower or wider viewing angle is appropriate.

Q: Do the substitute parts require circuit design modifications?

A: The LTL2T3TBK5 operates at 3.5V forward voltage compared to the original 3.8V, a 0.3V difference. For applications using fixed current-limiting resistors, this voltage difference may require resistor value adjustment to maintain the specified 20mA test current. The HLMP-KB45-A0000 operates at 3.2V forward voltage, requiring greater resistor adjustment. Consult circuit design specifications for current-limiting resistor calculations.

Q: What is the inventory status for each substitute part?

A: The LTL2T3TBK5 has 60,200 units in stock inventory. The HLMP-KB45-A0000 has 14,495 units in stock inventory. Both parts are in active production status, ensuring ongoing availability for production requirements.

Q: Are all substitute parts compliant with the same regulatory standards as the original CMD383UBC?

A: Yes. Both substitute parts are ROHS3 Compliant, REACH Unaffected, and classified as EAR99 under ECCN regulations, matching the original component's regulatory status. Moisture Sensitivity Level is 1 (Unlimited) for all parts, indicating no moisture sensitivity restrictions during storage or handling.

Q: Which substitute part should be selected for new designs?

A: The LTL2T3TBK5 is recommended for new designs requiring direct mechanical and electrical compatibility with the CMD383UBC specification. The HLMP-KB45-A0000 is suitable for applications where reduced brightness and wider viewing angle are acceptable, and where the smaller T-1 (3mm) lens size fits mechanical constraints.