HLMP4740 Equivalent & Substitute Parts

Part Overview

The HLMP4740 is a green diffused LED indicator in T-1 3/4 through-hole package manufactured by onsemi. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The HLMP4740 operates at 1.9V forward voltage with 2mA test current and delivers 3mcd brightness in a 5mm round domed lens configuration with 35° viewing angle.

Key Parameters

Parameter	Value
Manufacturer Part Number	HLMP4740
Manufacturer	onsemi
Color	Green
Lens Transparency	Diffused
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	1.9V
Current - Test	2mA
Millicandela Rating	3mcd
Viewing Angle	35°
Wavelength - Peak	565nm
Mounting Type	Through Hole
Package / Case	Radial
Height (Max)	6.30mm
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the HLMP4740 is determined by the following critical parameters: color (green), lens transparency (diffused), lens size (5mm T-1 3/4), mounting type (through-hole radial), and wavelength compatibility (565nm peak). Forward voltage, test current, and millicandela rating are secondary considerations that may vary within acceptable design tolerances depending on circuit implementation.

Substitute parts are grouped into two categories:

Category 1: Direct Form Factor Substitutes (5mm T-1 3/4 Through-Hole) Parts maintaining identical physical dimensions and mounting configuration, allowing direct PCB replacement with minimal circuit modification.

Category 2: Functional Equivalents (Alternative Voltage Ratings) Parts with compatible green wavelength and diffused lens but different voltage specifications, requiring circuit design adjustment.

Parameter Comparison

Part Number	Manufacturer	Color	Lens Transparency	Lens Size	Vf (Typ)	Current - Test	mcd	Viewing Angle	Peak Wavelength	Height (Max)	Product Status	Packaging
HLMP4740	onsemi	Green	Diffused	5mm, T-1 3/4	1.9V	2mA	3	35°	565nm	6.30mm	Obsolete	Radial
HLMP-3507	Broadcom Limited	Green	Diffused	5mm, T-1 3/4	2.1V	10mA	4.2	60°	565nm	9.19mm	Active	Bulk
HLMP-3507-D0001	Broadcom Limited	Green	Diffused	5mm, T-1 3/4	2.1V	10mA	4.2	60°	565nm	9.19mm	Active	Tape & Reel (TR)
HLMP-3507-D0002	Broadcom Limited	Green	Diffused	5mm, T-1 3/4	2.1V	10mA	4.2	60°	565nm	9.19mm	Active	Cut Tape (CT)
HLMP-3507-D00B2	Broadcom Limited	Green	Diffused	—	2.1V	10mA	4.2	—	565nm	—	Active	Bulk
HLMP-3507-EF000	Broadcom Limited	Green	Diffused	5mm, T-1 3/4	2.1V	10mA	13.9	60°	565nm	9.19mm	Obsolete	Bulk
HLMP-3680	Broadcom Limited	Green	Diffused	5mm, T-1 3/4	5V	10mA	1.6	60°	565nm	9.19mm	Active	Bulk
4302H5-5V	Visual Communications Company - VCC	Green	Diffused	5mm, T-1 3/4	5V	12mA	8	60°	565nm	10.08mm	Active	Bulk
4302H5-12V	Visual Communications Company - VCC	Green	Diffused	5mm, T-1 3/4	12V	13mA	8	60°	565nm	10.08mm	Active	Bulk
151051VS04000	Würth Elektronik	Green	Diffused	4.90mm Dia	2.1V	20mA	140	40°	573nm	8.95mm	Active	Bulk

Engineering Selection Recommendations

Primary Recommendation: HLMP-3507 Series (Broadcom Limited)

The HLMP-3507, HLMP-3507-D0001, and HLMP-3507-D0002 represent the most direct substitutes for the HLMP4740. All three variants share identical electrical specifications (2.1V, 10mA, 4.2mcd, 565nm peak wavelength) and maintain the 5mm T-1 3/4 form factor. These parts are in active product status with RoHS3 compliance and unlimited moisture sensitivity rating. Selection among the three variants depends on packaging requirements: bulk for general procurement, tape & reel for automated assembly, or cut tape for mixed-volume applications.

Secondary Recommendation: HLMP-3507-EF000 (Broadcom Limited)

This variant offers higher brightness (13.9mcd) while maintaining 2.1V operation and 5mm T-1 3/4 dimensions. Although classified as obsolete, it provides enhanced luminous intensity for applications requiring greater visibility. Availability should be verified before design commitment.

Alternative for 5V Systems: HLMP-3680 (Broadcom Limited)

For circuits operating at 5V supply voltage, the HLMP-3680 provides compatible green wavelength and diffused lens in the same 5mm T-1 3/4 package. Lower brightness (1.6mcd) and reduced viewing angle (60°) must be evaluated against application requirements.

Alternative for Higher Voltage Systems: 4302H5-5V or 4302H5-12V (VCC)

These parts accommodate 5V and 12V supply voltages respectively, with 8mcd brightness and 60° viewing angle. Slightly increased height (10.08mm) requires PCB clearance verification. RoHS3 compliant and active status.

Not Recommended: 151051VS04000 (Würth Elektronik)

While functionally compatible in color and wavelength, this part uses a 4.90mm diameter lens (non-standard T-1 3/4) and requires 20mA test current. Significantly higher brightness (140mcd) and different mechanical dimensions make it unsuitable for direct replacement without circuit and mechanical redesign.

Frequently Asked Questions (FAQ)

Q: Can HLMP-3507 directly replace HLMP4740 without circuit modification?

A: The HLMP-3507 maintains identical form factor and mounting type. However, forward voltage differs (2.1V vs. 1.9V) and test current increases (10mA vs. 2mA). Series resistor values in the LED drive circuit must be recalculated to accommodate these changes. Direct PCB substitution without circuit adjustment will result in excessive current and premature LED failure.

Q: What is the difference between HLMP-3507, HLMP-3507-D0001, and HLMP-3507-D0002?

A: These three part numbers are electrically and functionally identical. The differences are packaging only: bulk (standard reel), tape & reel (automated assembly), and cut tape (mixed-volume procurement). Select based on your assembly process requirements.

Q: Why is the 151051VS04000 not recommended as a substitute?

A: Although the 151051VS04000 shares green color and diffused lens characteristics, it uses a 4.90mm diameter lens instead of the standard 5mm T-1 3/4 form factor. This dimensional difference prevents direct PCB mounting. Additionally, its 140mcd brightness is 35 times higher than the HLMP4740, requiring complete circuit redesign for proper operation.

Q: Can I use a 5V-rated LED (HLMP-3680 or 4302H5-5V) in a 2V circuit?

A: No. The forward voltage rating indicates the minimum voltage required for proper LED operation. A 5V-rated LED will not illuminate adequately at 2V supply voltage. Conversely, operating a 2V LED at 5V without appropriate current-limiting resistance will cause immediate failure.

Q: What does "obsolete" product status mean for the HLMP4740?

A: Obsolete status indicates the manufacturer has discontinued production and removed the part from active inventory. While existing stock may be available through distributors, long-term supply cannot be guaranteed. Migration to active-status alternatives (HLMP-3507 series) is recommended for new designs and ongoing production.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All recommended substitute parts carry RoHS3 compliance certification. The original HLMP4740 is not listed with RoHS status in the provided data. Verify RoHS compliance requirements for your specific application and region.

Q: What is the significance of the 35° viewing angle on HLMP4740 versus 60° on most substitutes?

A: Viewing angle defines the cone of light emission. A narrower 35° angle concentrates light in a tighter beam, while 60° spreads light over a wider area. If your application requires narrow-angle indication, verify that the wider 60° angle of substitute parts meets visibility requirements from the intended viewing positions.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message