MV7843 LED Red Clear T-1 T/H Equivalent & Substitute Parts

Part Overview

The MV7843 is a red LED indicator in T-1 through-hole package manufactured by onsemi. This discrete 2.1V radial LED is designed for indication applications with a 3mm domed lens and 240mcd brightness rating. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, maintenance, and production continuity.

Substiute Parts

MV7843

onsemiIn Stock: 858MV7843 Datasheet

Current PartRFQ

MV7043

onsemiIn Stock: 744MV7043 Datasheet

Parametric EquivalentRFQ

MV7843

onsemiIn Stock: 858MV7843 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the MV7843 is determined by strict equivalence across the following critical parameters:

• Color: Red
• Lens Size: 3mm, T-1
• Lens Style: Round with Domed Top
• Lens Transparency: Clear
• Voltage - Forward (Vf) (Typ): 2.1V
• Current - Test: 20mA
• Millicandela Rating: 240mcd
• Viewing Angle: 60°
• Mounting Type: Through Hole
• Package / Case: Radial
• Height (Max): 6.30mm

The MV7043 meets all critical substitution parameters with the exception of wavelength peak specification (645nm versus 630nm for the MV7843). This wavelength difference represents a shift within the red spectrum and must be evaluated against application-specific color requirements.

Parameter Comparison

Engineering Selection Recommendations

The MV7043 provides parametric equivalence to the MV7843 across all critical electrical and mechanical specifications. Both parts share identical forward voltage, test current, brightness rating, viewing angle, and physical dimensions. Both maintain REACH Unaffected status and EAR99 ECCN classification.

The wavelength peak difference (645nm versus 630nm) represents a spectral shift within the red LED range. Selection between these parts depends on application-specific color matching requirements and whether the longer wavelength of the MV7043 is acceptable for the intended indication function.

Both parts are obsolete. Inventory availability should be confirmed with component suppliers prior to procurement decisions.

Frequently Asked Questions (FAQ)

Q: Can the MV7043 be used as a direct replacement for the MV7843?

A: The MV7043 matches all critical electrical and mechanical parameters of the MV7843, including forward voltage (2.1V), test current (20mA), brightness (240mcd), viewing angle (60°), and physical dimensions (3mm T-1 radial package, 6.30mm height). The wavelength peak differs (645nm versus 630nm), which may affect color perception in the application. Compatibility depends on whether this wavelength shift is acceptable for your indication requirements.

Q: What determines whether a substitute LED is compatible with the MV7843?

A: Compatibility is established through equivalence in forward voltage, test current, millicandela rating, viewing angle, lens size, lens style, mounting type, and package dimensions. Wavelength peak specification must be evaluated against application-specific color requirements.

Q: Are there any compliance or regulatory differences between the MV7843 and MV7043?

A: Both parts maintain identical REACH and ECCN classifications (REACH Unaffected, EAR99). Both carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: Why is the MV7843 listed as obsolete?

A: The product status reflects current manufacturer availability. Obsolete designation indicates the part is no longer in active production. Equivalent parts such as the MV7043 may be available through component inventory channels.

Q: Does the wavelength difference between MV7843 (630nm) and MV7043 (645nm) affect circuit performance?

A: Wavelength differences do not affect electrical circuit performance, forward voltage, or current characteristics. The difference is perceptual—the MV7043 produces a slightly longer-wavelength red appearance. Circuit-level compatibility remains unchanged.