CMD3750 LED Red Clear T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The CMD3750 is a red LED indication component manufactured by Visual Communications Company (VCC) in a T-1 3/4 through-hole radial package. This discrete 2.2V LED features a clear lens with 150mcd brightness rating and 24° viewing angle, designed for standard red indication applications. The CMD3750 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and new production requirements. Substitute parts must maintain compatibility with the through-hole radial mounting configuration and preserve the electrical characteristics required for direct circuit integration.

Key Parameters

Parameter	Value	Criticality for Substitution
Lens Size	5mm, T-1 3/4	Critical - Physical fit and mounting compatibility
Mounting Type	Through Hole, Radial	Critical - PCB assembly compatibility
Voltage - Forward (Vf) Typical	2.2V	Critical - Circuit design and current limiting
Current - Test	20mA	Important - Operating point specification
Color	Red	Critical - Visual indication function
Lens Transparency	Clear	Important - Optical output characteristics
Millicandela Rating	150mcd	Important - Brightness and visibility
Viewing Angle	24°	Important - Directional light output
Wavelength - Peak	635nm	Important - Red spectrum confirmation
Package / Case	Radial	Critical - Component orientation and lead configuration
RoHS Status	ROHS3 Compliant	Important - Regulatory compliance

Substitute Part Grouping Explanation

Substitute parts for the CMD3750 are grouped based on strict adherence to the following allowed parameters:

Primary Substitution Criteria (Must Match):

Lens Size: 5mm, T-1 3/4
Mounting Type: Through Hole, Radial
Color: Red
Package / Case: Radial
Wavelength - Peak: 635nm (red spectrum confirmation)

Secondary Compatibility Parameters (Allowable Variance):

Voltage - Forward (Vf): 1.7V to 2.2V range acceptable for standard current-limiting circuit designs
Current - Test: 2mA to 20mA range, with circuit design adjustment
Millicandela Rating: Brightness variance acceptable if application permits
Viewing Angle: 24° to 65° range acceptable depending on application requirements
Lens Transparency: Clear or Diffused acceptable based on application needs

Regulatory Compliance:

RoHS3 Compliant status preferred for new designs
REACH Unaffected or REACH Compliant status required

Substitute parts are organized by lens transparency type (Clear vs. Diffused) and product status (Active vs. Obsolete) to facilitate selection based on design requirements and supply chain availability.

Parameter Comparison

Part Number	Manufacturer	Lens Size	Mounting Type	Vf (Typ)	Current - Test	Color	Lens Transparency	mcd Rating	Viewing Angle	Peak Wavelength	Product Status	RoHS Status
CMD3750	VCC	5mm, T-1 3/4	Through Hole, Radial	2.2V	20mA	Red	Clear	150mcd	24°	635nm	Obsolete	ROHS3 Compliant
HLMP-3750	Broadcom Limited	5mm, T-1 3/4	Through Hole, Radial	1.9V	20mA	Red	Clear	125mcd	24°	635nm	Active	ROHS3 Compliant
HLMP-3750-L0002	Broadcom Limited	5mm, T-1 3/4	Through Hole, Radial	1.9V	20mA	Red	Clear	125mcd	24°	635nm	Active	ROHS3 Compliant
HLMP-4700	Broadcom Limited	5mm, T-1 3/4	Through Hole, Radial	1.7V	2mA	Red	Diffused	2.3mcd	50°	635nm	Active	ROHS3 Compliant
HLMP3300	onsemi	5mm, T-1 3/4	Through Hole, Radial	2.2V	10mA	Red	Diffused	3.5mcd	65°	635nm	Obsolete	Not specified
HLMP3300A2R0	Everlight Electronics Co Ltd	5mm, T-1 3/4	Through Hole, Radial	2.2V	10mA	Red	Diffused	3.5mcd	65°	635nm	Active	ROHS3 Compliant
HLMP3300A4R0	Everlight Electronics Co Ltd	5mm, T-1 3/4	Through Hole, Radial	2.2V	10mA	Red	Diffused	3.5mcd	65°	635nm	Active	ROHS3 Compliant
HLMP3301	onsemi	5mm, T-1 3/4	Through Hole, Radial	2.2V	10mA	Red	Diffused	7mcd	65°	635nm	Obsolete	Not specified
HLMP3315	onsemi	5mm, T-1 3/4	Through Hole, Radial	2.2V	10mA	Red	Diffused	18mcd	35°	635nm	Obsolete	Not specified
HLMP3316	onsemi	5mm, T-1 3/4	Through Hole, Radial	2.2V	10mA	Red	Diffused	35mcd	35°	635nm	Obsolete	Not specified
HLMP47009MP7	onsemi	5mm, T-1 3/4	Through Hole, Right Angle	1.8V	2mA	Red	Diffused, Tinted	2mcd	45°	Not specified	Obsolete	Not specified

Engineering Selection Recommendations

Primary Substitute - Clear Lens, Active Status:

HLMP-3750 and HLMP-3750-L0002 (Broadcom Limited) are the preferred direct substitutes for CMD3750. Both parts maintain identical physical form factor (5mm T-1 3/4 through-hole radial), identical lens transparency (clear), identical viewing angle (24°), and identical test current (20mA). The forward voltage differential (1.9V vs. 2.2V) is within acceptable tolerance for standard current-limiting resistor circuits. Both parts carry Active product status and ROHS3 Compliant certification, ensuring long-term supply availability and regulatory compliance. HLMP-3750-L0002 is supplied in Tape & Reel packaging for automated assembly, while HLMP-3750 is supplied in Bulk packaging.

Secondary Substitutes - Diffused Lens, Matched Forward Voltage:

HLMP3300A2R0 and HLMP3300A4R0 (Everlight Electronics Co Ltd) provide substitution for applications where diffused lens output is acceptable. Both parts match the CMD3750 forward voltage (2.2V) and maintain the 5mm T-1 3/4 through-hole radial configuration. These parts carry Active product status and ROHS3 Compliant certification. The diffused lens reduces brightness concentration (3.5mcd vs. 150mcd) and increases viewing angle (65° vs. 24°), suitable for applications requiring wider light distribution. Test current is 10mA, requiring circuit design adjustment from the original 20mA specification.

Tertiary Substitutes - Diffused Lens, Obsolete Status:

HLMP3301, HLMP3315, and HLMP3316 (onsemi) provide substitution options with varying brightness levels (7mcd, 18mcd, 35mcd respectively) while maintaining 2.2V forward voltage and 5mm T-1 3/4 through-hole radial configuration. These parts are classified as Obsolete, limiting their suitability for new designs but acceptable for maintenance and repair of existing equipment. All three parts feature diffused lens transparency and 10mA test current.

Not Recommended:

HLMP47009MP7 (onsemi) features right-angle mounting configuration, incompatible with the radial through-hole requirement of CMD3750 applications. This part is not suitable for direct substitution.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3750 directly replace CMD3750 without circuit modification?

A: HLMP-3750 maintains identical physical mounting (5mm T-1 3/4 through-hole radial), identical lens transparency (clear), identical viewing angle (24°), and identical test current (20mA). The forward voltage is 1.9V versus 2.2V. In standard current-limiting resistor circuits, this 0.3V difference is absorbed by the resistor value and does not require circuit redesign. Direct substitution is acceptable for most applications.

Q: What is the difference between HLMP-3750 and HLMP-3750-L0002?

A: Both parts are electrically and mechanically identical. The difference is packaging format: HLMP-3750 is supplied in Bulk packaging for manual assembly, while HLMP-3750-L0002 is supplied in Tape & Reel (TR) format for automated pick-and-place assembly. Select based on assembly process requirements.

Q: Why do some substitutes have lower brightness (mcd) ratings?

A: Brightness rating depends on lens transparency and design. Clear lens parts (HLMP-3750 series) concentrate light output, achieving higher mcd ratings. Diffused lens parts (HLMP3300 series) scatter light over a wider area, resulting in lower mcd ratings but wider viewing angles. Select based on application visibility requirements and viewing angle needs.

Q: Can I use HLMP3300A2R0 or HLMP3300A4R0 as substitutes?

A: Yes, these Everlight parts are suitable substitutes if your application accepts diffused lens output. They match the 2.2V forward voltage of CMD3750 and maintain the 5mm T-1 3/4 through-hole radial configuration. However, brightness is significantly lower (3.5mcd vs. 150mcd) and viewing angle is wider (65° vs. 24°). Verify that your application's visibility and directional requirements are compatible with these optical characteristics.

Q: What does "Active" product status mean versus "Obsolete"?

A: Active status indicates the manufacturer continues production and maintains long-term supply availability. Obsolete status indicates the manufacturer has discontinued production. For new designs, select Active status parts (HLMP-3750, HLMP3300A2R0, HLMP3300A4R0) to ensure supply chain continuity. Obsolete parts are acceptable for maintenance and repair of existing equipment.

Q: Are all substitute parts RoHS3 Compliant?

A: HLMP-3750, HLMP-3750-L0002, HLMP-4700, HLMP3300A2R0, and HLMP3300A4R0 are explicitly marked ROHS3 Compliant. HLMP3300, HLMP3301, HLMP3315, HLMP3316, and HLMP47009MP7 do not specify RoHS status in the provided data. For applications requiring RoHS3 compliance certification, select only parts with explicit ROHS3 Compliant designation.

Q: Can I use HLMP47009MP7 as a substitute?

A: No. HLMP47009MP7 features right-angle mounting configuration, which is mechanically incompatible with the radial through-hole requirement of CMD3750 applications. This part is not suitable for direct substitution.

Q: What is the significance of the 24° viewing angle in CMD3750?

A: The 24° viewing angle indicates narrow, directional light output. This is suitable for applications requiring focused indication in a specific direction. Substitute parts with wider viewing angles (50° to 65°) provide broader light distribution but less directional intensity. Select based on your application's viewing geometry and visibility requirements.

Q: How do I choose between clear and diffused lens substitutes?

A: Clear lens parts (HLMP-3750 series) provide high brightness with narrow viewing angle, suitable for applications requiring bright, directional indication. Diffused lens parts (HLMP3300 series) provide lower brightness with wider viewing angle, suitable for applications requiring visible indication from multiple viewing angles. Select based on your application's brightness requirement and viewing angle needs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message