MV6951 Red LED T-1 3/4 Through Hole Equivalent & Substitute Parts

Part Overview

The onsemi MV6951 is a red diffused LED in T-1 3/4 (5mm) through-hole package designed for LED indication applications. It features a 2.4V forward voltage, 12mcd brightness rating, and 70° viewing angle. The MV6951 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain compatibility with through-hole mounting, similar optical characteristics, and red wavelength specifications within the 626nm to 650nm range.

Key Parameters

Parameter	MV6951 Value
Manufacturer	onsemi
Color	Red
Lens Transparency	Diffused
Lens Style	Round with Domed Top
Lens Size	5mm, T-1 3/4
Voltage - Forward (Vf) (Typ)	2.4V
Current - Test	20mA
Viewing Angle	70°
Mounting Type	Through Hole
Wavelength - Peak	650nm
Millicandela Rating	12mcd
Height (Max)	8.89mm
Package / Case	Radial
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the MV6951 are evaluated based on the following critical parameters:

Mechanical Compatibility: Lens size (5mm T-1 3/4), lens style (round with domed top), mounting type (through hole radial), and package case (radial) must match or be functionally equivalent.

Optical Characteristics: Color (red), lens transparency (diffused), and wavelength range (peak wavelength 635nm to 650nm, dominant wavelength 626nm to 645nm) determine visual compatibility.

Electrical Parameters: Forward voltage (Vf) and test current establish circuit compatibility. Substitutes with significantly different Vf or current ratings may require circuit modifications.

Product Status & Compliance: Active product status ensures ongoing availability. RoHS3 compliance and REACH unaffected status are preferred for regulatory alignment.

Substitute parts are grouped into two categories: direct electrical substitutes (similar Vf and current ratings) and functional substitutes (compatible mechanical and optical characteristics with different electrical specifications).

Parameter Comparison

Parameter	MV6951	151051RS11000	4302H1-12V	4302H1-5V	HLMP-3301	HLMP-3301-D0000	HLMP-3301-F0001
Manufacturer	onsemi	Würth Elektronik	VCC	VCC	Broadcom	Broadcom	Broadcom
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
Color	Red	Red	Red	Red	Red	Red	Red
Lens Transparency	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused	Diffused
Lens Size	5mm, T-1 3/4	4.90mm Dia	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
Voltage - Forward (Vf) (Typ)	2.4V	2.1V	12V	5V	1.9V	1.9V	1.9V
Current - Test	20mA	20mA	13mA	10mA	10mA	10mA	10mA
Viewing Angle	70°	60°	60°	60°	60°	60°	60°
Wavelength - Peak	650nm	650nm	635nm	635nm	635nm	635nm	635nm
Millicandela Rating	12mcd	30mcd	8mcd	8mcd	5.4mcd	2.1mcd	5.4mcd
Height (Max)	8.89mm	8.95mm	10.08mm	10.08mm	9.19mm	9.19mm	9.19mm
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Closest Electrical Match):

The Würth Elektronik 151051RS11000 provides the closest electrical compatibility with 2.1V forward voltage and 20mA test current, matching the MV6951's current rating. This part is active, RoHS3 compliant, and available in bulk packaging. Lens size is 4.90mm diameter, functionally equivalent to 5mm T-1 3/4. Brightness is higher at 30mcd versus 12mcd, suitable for applications where increased visibility is acceptable.

Secondary Substitutes (Broadcom HLMP-3301 Series):

The Broadcom HLMP-3301 family offers multiple packaging options (bulk, tape & reel, cut tape) with consistent 1.9V forward voltage and 10mA test current. These parts are active and RoHS3 compliant. Brightness varies by variant: HLMP-3301 and HLMP-3301-F0001 provide 5.4mcd, while HLMP-3301-D0000 and HLMP-3301-D0002 provide 2.1mcd. Lower forward voltage requires circuit verification to ensure adequate current limiting. Multiple packaging options support both prototype and production volumes.

Alternative Substitutes (VCC 4302H1 Series):

The Visual Communications Company 4302H1-5V and 4302H1-12V are active, RoHS3 compliant alternatives. The 4302H1-5V (5V forward voltage, 10mA) is closer to standard logic-level circuits. The 4302H1-12V (12V forward voltage, 13mA) suits higher-voltage applications. Both feature 8mcd brightness and 60° viewing angle. Height is 10.08mm, slightly taller than the MV6951.

Regulatory Compliance:

All recommended substitutes are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements. The MV6951's product status as obsolete necessitates transition to active alternatives for long-term supply chain stability.

Frequently Asked Questions (FAQ)

Q: Can the Würth Elektronik 151051RS11000 directly replace the MV6951 without circuit changes?

A: The 151051RS11000 has 2.1V forward voltage versus the MV6951's 2.4V, a 0.3V difference. This is within typical circuit tolerance for LED indication applications. Verify that your current-limiting resistor accommodates the lower voltage drop. The 20mA test current matches the MV6951, supporting direct substitution in most designs.

Q: Why do Broadcom HLMP-3301 variants have lower forward voltage (1.9V) than the MV6951 (2.4V)?

A: Forward voltage varies with LED die chemistry and manufacturing process. The 1.9V specification for HLMP-3301 is a characteristic of Broadcom's red LED design. Circuit resistor values must be recalculated to maintain desired brightness and current. Lower Vf reduces power dissipation, which may be advantageous in battery-powered applications.

Q: What is the difference between HLMP-3301, HLMP-3301-D0000, and HLMP-3301-F0001?

A: These are variants of the same base product (HLMP-3301) with different brightness ratings and packaging. HLMP-3301-D0000 provides 2.1mcd (lower brightness), while HLMP-3301 and HLMP-3301-F0001 provide 5.4mcd (higher brightness). Packaging differs: bulk, cut tape, and tape & reel options support different procurement and assembly methods. Electrical specifications (1.9V, 10mA) are identical across variants.

Q: Is the 4.90mm lens diameter of the 151051RS11000 compatible with 5mm mounting holes?

A: The 4.90mm diameter is functionally equivalent to 5mm T-1 3/4 specification. Standard 5mm LED mounting holes accommodate both sizes. Verify mechanical fit in your specific PCB design, as tolerance stack-up may affect retention. The 151051RS11000 is radial package, matching the MV6951's mounting style.

Q: Which substitute offers the best brightness match to the MV6951's 12mcd rating?

A: The Würth Elektronik 151051RS11000 at 30mcd is the brightest option, providing 2.5× the MV6951's brightness. For closer brightness matching, the Broadcom HLMP-3301 and HLMP-3301-F0001 at 5.4mcd are lower but still suitable for indication applications. Brightness selection depends on application requirements; higher brightness may cause glare in dark environments.

Q: Are all recommended substitutes available in the same packaging as the MV6951?

A: The MV6951 was supplied in bulk packaging. Most substitutes offer multiple packaging options: bulk (standard), tape & reel (production assembly), and cut tape (prototype). The Broadcom HLMP-3301 series provides the widest packaging flexibility. Verify packaging availability with your supplier for your specific procurement volume and assembly method.

Q: What is the viewing angle difference between the MV6951 (70°) and most substitutes (60°)?

A: The MV6951's 70° viewing angle provides wider light distribution than the 60° standard of most substitutes. For applications requiring wide-angle visibility, the 151051RS11000 at 60° may show slightly narrower light cone. In typical PCB-mounted indication applications, this 10° difference is often imperceptible. Verify viewing angle requirements for your specific application geometry.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message