MV3450P LED Green Clear T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The MV3450P is a green LED indicator manufactured by Everlight Electronics Co Ltd, designed for discrete indication applications in through-hole mounting configurations. This T-1 3/4 (5mm) LED features a clear lens with 150 millicandela brightness rating and operates at 2.2V forward voltage with 20mA test current. The part is currently active in production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1).

Equivalent and substitute parts are necessary when the MV3450P reaches end-of-life status, when inventory becomes unavailable, or when design requirements necessitate alternative electrical or optical characteristics within the same physical form factor and mounting type.

Key Parameters

Parameter	MV3450P Value	Significance for Substitution
Lens Size / Form Factor	5mm, T-1 3/4	Physical compatibility with PCB mounting holes and mechanical clearance
Mounting Type	Through Hole	Determines PCB assembly compatibility and lead configuration
Color	Green	Optical output wavelength and application-specific indication requirements
Lens Transparency	Clear	Affects light diffusion and brightness perception at viewing angles
Voltage - Forward (Vf) Typical	2.2V	Circuit design and current-limiting resistor calculations
Current - Test	20mA	Power supply capacity and thermal design requirements
Millicandela Rating	150mcd	Brightness and visibility in target application environment
Viewing Angle	24°	Directional light emission and observer position constraints
Wavelength - Peak	565nm	Color specification and optical filter compatibility
Height (Max)	8.89mm	PCB clearance and enclosure fit verification
Package / Case	Radial	Lead configuration and soldering process compatibility
RoHS Status	ROHS3 Compliant	Regulatory compliance for target markets

Substitute Part Grouping Explanation

Substitute parts for the MV3450P are classified into two categories based on electrical and optical parameter alignment:

Parametric Equivalents maintain all critical electrical and optical specifications within the same operating envelope. These parts share identical or functionally equivalent forward voltage (2.2V), test current (20mA), millicandela rating (150mcd), lens transparency (clear), and viewing angle (24°). Parametric equivalents are direct replacements requiring no circuit modification.

Similar Parts share the same physical form factor (5mm T-1 3/4 through-hole radial package) and color (green) but differ in one or more electrical or optical parameters. These parts require circuit design review and may necessitate resistor value adjustments or application reassessment based on brightness, voltage, current, or lens transparency differences.

The following parameters determine substitution eligibility:

Lens size and form factor (5mm T-1 3/4)
Mounting type (through-hole radial)
Color (green)
Peak wavelength (565nm nominal range)
Package configuration (radial leads)

Parameter Comparison

Parameter	MV3450P (Main)	HLMP3950A	HLMP-C523	MV3450B4R0	HLMP-3507	4302H5-5V	4302H5-12V
Manufacturer	Everlight Electronics	Fairchild Semiconductor	Broadcom Limited	Fairchild Semiconductor	Broadcom Limited	Visual Communications Company	Visual Communications Company
Lens Size	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4	5mm, T-1 3/4
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Color	Green	Green	Green	Green	Green	Green	Green
Lens Transparency	Clear	Clear	Clear	Clear	Diffused	Diffused	Diffused
Voltage - Forward (Vf) Typical	2.2V	2.2V	2.2V	2.2V	2.1V	5V	12V
Current - Test	20mA	20mA	20mA	20mA	10mA	12mA	13mA
Millicandela Rating	150mcd	150mcd	170mcd	150mcd	4.2mcd	8mcd	8mcd
Viewing Angle	24°	24°	25°	24°	60°	60°	60°
Wavelength - Peak	565nm	565nm	568nm	565nm	565nm	565nm	565nm
Height (Max)	8.89mm	8.89mm	8.91mm	8.89mm	9.19mm	10.08mm	10.08mm
Package / Case	Radial	Radial	Radial	Radial	Radial	Radial	Radial
Product Status	Active	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	Not applicable	ROHS3 Compliant	Not applicable	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	Not specified	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Parametric Equivalents (No Circuit Modification Required)

The following parts are parametric equivalents to the MV3450P and require no circuit design changes:

HLMP-C523 (Broadcom Limited) - Active product status with ROHS3 compliance. Identical electrical specifications (2.2V, 20mA, 150mcd equivalent at 170mcd rating). Clear lens with 25° viewing angle. Peak wavelength 568nm within specification tolerance. Height 8.91mm compatible with MV3450P clearance requirements. MSL 1 rating matches original part. Recommended for new designs and production continuity.

MV3450B4R0 (Fairchild Semiconductor) - Active product status. Identical electrical and optical specifications (2.2V, 20mA, 150mcd, 24° viewing angle, 565nm peak wavelength). Height 8.89mm matches original. RoHS status not applicable; MSL 3 rating indicates moisture sensitivity during storage (168-hour limit). Suitable for applications with controlled storage environments.

Similar Parts (Circuit Design Review Required)

HLMP3950A (Fairchild Semiconductor) - Obsolete product status. Identical electrical and optical specifications to MV3450P (2.2V, 20mA, 150mcd, 24° viewing angle, 565nm peak wavelength). RoHS status not applicable. Not recommended for new designs due to obsolescence; suitable only for legacy system maintenance where inventory is available.

HLMP-3507 (Broadcom Limited) - Active product status with ROHS3 compliance. Diffused lens (vs. clear) with significantly reduced brightness (4.2mcd vs. 150mcd) and wider viewing angle (60° vs. 24°). Lower forward voltage (2.1V) and test current (10mA) require resistor recalculation. Suitable for applications requiring wide-angle diffused indication with lower brightness requirements.

4302H5-5V (Visual Communications Company) - Active product status with ROHS3 compliance. Diffused lens with 8mcd brightness and 60° viewing angle. Forward voltage 5V (vs. 2.2V) and test current 12mA require complete circuit redesign. Height 10.08mm exceeds MV3450P clearance by 1.19mm. Suitable only for applications with 5V supply and modified mechanical layout.

4302H5-12V (Visual Communications Company) - Active product status with ROHS3 compliance. Diffused lens with 8mcd brightness and 60° viewing angle. Forward voltage 12V (vs. 2.2V) and test current 13mA require complete circuit redesign. Height 10.08mm exceeds MV3450P clearance by 1.19mm. Suitable only for applications with 12V supply and modified mechanical layout.

Frequently Asked Questions (FAQ)

Q: Can HLMP-C523 be used as a direct replacement for MV3450P without circuit modification?

A: Yes. HLMP-C523 maintains identical forward voltage (2.2V), test current (20mA), and brightness rating (170mcd, equivalent to 150mcd specification). Clear lens and 25° viewing angle are functionally equivalent to the original part. No resistor or circuit changes are required.

Q: What is the difference between "clear" and "diffused" lens options?

A: Clear lens LEDs (MV3450P, HLMP-C523, MV3450B4R0, HLMP3950A) concentrate light output within a narrow viewing angle (24-25°), producing higher brightness at the center viewing axis. Diffused lens LEDs (HLMP-3507, 4302H5-5V, 4302H5-12V) scatter light across a wider viewing angle (60°), reducing peak brightness but improving visibility from off-axis positions. Selection depends on application viewing geometry.

Q: Why do 4302H5-5V and 4302H5-12V require circuit redesign?

A: These parts operate at 5V and 12V forward voltage respectively, compared to 2.2V for the MV3450P. Current-limiting resistor values must be recalculated based on the new forward voltage and available supply voltage. Using original resistor values will result in incorrect LED current and potential component damage.

Q: Is MV3450B4R0 suitable for new product designs?

A: MV3450B4R0 is active in production status with identical electrical and optical specifications to MV3450P. However, MSL 3 rating (168-hour moisture sensitivity limit) requires controlled storage and handling procedures. For applications with standard storage conditions, HLMP-C523 with MSL 1 rating is preferred.

Q: Can HLMP3950A be used in new designs?

A: HLMP3950A is classified as obsolete and is not recommended for new designs. While electrical and optical specifications match MV3450P exactly, obsolete status indicates discontinued manufacturing and limited future availability. Use HLMP-C523 or MV3450B4R0 for new product development.

Q: What is the maximum height constraint for PCB mounting?

A: MV3450P specifies 8.89mm maximum height. HLMP-C523 (8.91mm) and MV3450B4R0 (8.89mm) are compatible. HLMP-3507 (9.19mm) exceeds specification by 0.30mm. VCC parts 4302H5-5V and 4302H5-12V (10.08mm) exceed specification by 1.19mm and require mechanical clearance verification.

Q: Are all substitute parts ROHS3 compliant?

A: No. HLMP3950A and MV3450B4R0 show "Not applicable" RoHS status, indicating they may not meet ROHS3 requirements. HLMP-C523, HLMP-3507, 4302H5-5V, and 4302H5-12V are explicitly ROHS3 compliant. Verify RoHS compliance requirements for target markets before part selection.

Q: What viewing angle should I select for my application?

A: Narrow viewing angle (24-25°) parts (MV3450P, HLMP-C523, MV3450B4R0, HLMP3950A) concentrate brightness for direct line-of-sight observation. Wide viewing angle (60°) parts (HLMP-3507, 4302H5-5V, 4302H5-12V) provide visibility from multiple observer positions. Selection depends on intended viewing geometry and brightness requirements.

Q: Can I substitute a 4302H5-5V for MV3450P if I adjust the resistor?

A: Resistor adjustment alone is insufficient. The 4302H5-5V operates at 5V forward voltage (vs. 2.2V), has diffused lens (vs. clear), produces 8mcd brightness (vs. 150mcd), and measures 10.08mm height (vs. 8.89mm). Circuit redesign, optical performance reassessment, and mechanical layout verification are required.

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