MV37509MP6 LED Circuit Board Indicator - Equivalent & Substitute Parts

Part Overview

The MV37509MP6 is a red LED circuit board indicator manufactured by onsemi, featuring a 5mm T-1 3/4 through-hole right-angle configuration with a tinted lens. This component is classified as obsolete, with 646 units currently in stock. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity and procurement planning. Substitute parts must maintain compatibility across electrical characteristics, mechanical form factor, and mounting configuration.

Key Parameters

Parameter	MV37509MP6 Value
Color	Red
Wavelength - Peak	635nm
Configuration	Single
Current	20mA
Millicandela Rating	150mcd
Lens Type	Tinted
Lens Style	Round with Domed Top
Lens Size	5mm, T-1 3/4
Voltage Rating	2.2V
Mounting Type	Through Hole, Right Angle
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the MV37509MP6 are evaluated based on the following critical parameters:

Color and Wavelength: Red spectrum (peak wavelength 635nm or adjacent red wavelengths 623nm–645nm)
Electrical Characteristics: Forward voltage (Vf) and test current compatibility with 20mA operation
Mechanical Form Factor: 5mm T-1 3/4 lens size with round domed top configuration
Mounting Configuration: Through-hole radial or right-angle mounting
Luminous Intensity: Millicandela rating in the range of 150mcd or higher for equivalent brightness
Product Status: Active status preferred for long-term availability

Substitute parts are grouped into two categories: direct equivalents (MV37509MP7) and functionally compatible alternatives that meet the core electrical and mechanical requirements.

Parameter Comparison

Parameter	MV37509MP6	MV37509MP7	HLMP-D105	LTL2R3KEK	LTL2R3KRK	OVLLR8C7
Manufacturer	onsemi	Fairchild Semiconductor	Broadcom Limited	Lite-On Inc.	Lite-On Inc.	TT Electronics/Optek Technology
Color	Red	Red	Red	Red	Red	Red
Wavelength - Peak (nm)	635	635	645	632	639	—
Current (mA)	20	20	20	20	20	20
Voltage - Forward (V)	2.2	2.2	1.8	2.05	2.0	2.0
Millicandela Rating (mcd)	150	150	240	700	680	900
Lens Style	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Domed Top	Round with Flat Top
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
Mounting Type	Through Hole, Right Angle	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Lens Transparency	Tinted	Tinted	Clear	Clear	Clear	Clear
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	3 (168 Hours)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: MV37509MP7

MV37509MP7 is the direct equivalent from Fairchild Semiconductor, maintaining identical electrical specifications (2.2V forward voltage, 20mA current, 150mcd brightness) and mechanical configuration (5mm T-1 3/4 right-angle through-hole). This part is active in production and ROHS3 compliant. The primary consideration is the higher MSL rating (3 vs. 1), which may require adjusted storage and handling protocols in moisture-sensitive environments.

Secondary Substitutes: HLMP-D105, LTL2R3KEK, LTL2R3KRK

These parts maintain the 20mA test current and 5mm T-1 3/4 form factor. HLMP-D105 offers higher brightness (240mcd) with lower forward voltage (1.8V), suitable for applications where reduced power dissipation is beneficial. LTL2R3KEK and LTL2R3KRK provide significantly higher brightness (700mcd and 680mcd respectively) with forward voltages near the original specification (2.05V and 2.0V). All three are active products with MSL 1 rating and ROHS3 compliance.

Alternative Substitute: OVLLR8C7

OVLLR8C7 from TT Electronics/Optek Technology meets the core electrical and mechanical requirements with 20mA current and 5mm T-1 3/4 form factor. This part delivers the highest brightness (900mcd) and features a flat-top lens rather than domed, which may affect optical characteristics in the application. Forward voltage is 2.0V, and the part is ROHS3 compliant with MSL 1 rating.

Compliance Considerations

All recommended substitutes are ROHS3 compliant and REACH unaffected. MSL 1 rated parts (HLMP-D105, LTL2R3KEK, LTL2R3KRK, OVLLR8C7) require no special moisture handling. MV37509MP7 carries MSL 3 rating, requiring controlled storage at ≤30% relative humidity and limiting shelf life to 168 hours after bag opening.

Frequently Asked Questions (FAQ)

Q: Can MV37509MP7 be used as a direct replacement for MV37509MP6?

A: Yes. MV37509MP7 maintains identical electrical specifications (2.2V, 20mA, 150mcd) and mechanical configuration (5mm T-1 3/4 right-angle through-hole). The primary difference is product status (active vs. obsolete) and MSL rating (3 vs. 1). Designs using MV37509MP6 can transition to MV37509MP7 without circuit modification.

Q: What is the impact of forward voltage differences in substitute parts?

A: Forward voltage variations (1.8V to 2.2V) affect series resistor sizing in current-limiting circuits. Parts with lower Vf (HLMP-D105 at 1.8V) require slightly higher series resistance to maintain 20mA operation; parts with higher Vf require lower resistance. Recalculation of series resistor values is necessary when substituting parts with Vf differing by more than ±0.2V.

Q: How do brightness differences affect circuit performance?

A: Millicandela rating determines perceived brightness. Substitute parts range from 150mcd (MV37509MP7) to 900mcd (OVLLR8C7). Higher brightness parts may appear over-bright in applications designed for 150mcd operation. If brightness consistency is critical, select substitutes with mcd ratings within ±20% of the original specification.

Q: Are there mechanical compatibility concerns with different lens styles?

A: MV37509MP6 features a tinted domed lens; most substitutes use clear domed or flat-top lenses. Lens transparency affects color perception and light distribution. Tinted lenses provide color filtering; clear lenses transmit full spectrum. Flat-top lenses (OVLLR8C7) have different light distribution patterns than domed lenses. Verify optical performance in the specific application before final selection.

Q: What is the significance of MSL ratings for these parts?

A: MSL 1 parts (HLMP-D105, LTL2R3KEK, LTL2R3KRK, OVLLR8C7) have unlimited shelf life and require no special moisture handling. MSL 3 parts (MV37509MP7) must be stored at ≤30% relative humidity and have a 168-hour shelf life after bag opening. For high-volume or long-lead-time applications, MSL 1 parts are preferred to minimize storage constraints.

Q: Can 4302H1-12V or 4302H1-5V be used as substitutes?

A: These parts are not recommended as direct substitutes. Both operate at significantly higher voltages (12V and 5V respectively) with lower brightness (8mcd) and different current characteristics (13mA and 10mA). Circuit redesign would be required to accommodate these electrical differences.

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