MB403-A28-CA LED Lamp Equivalent & Substitute Parts

Part Overview

The MB403-A28-CA is an active-status LED lamp replacement designed for miniature bayonet (BA9S) applications. This amber-colored T-3 1/4 form factor lamp operates at 28V forward voltage and delivers 2180 millicandela output. The part is manufactured by Visual Communications Company (VCC) and is ROHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement in the same circuit and mechanical envelope.

Substiute Parts

MB403-A28-CA

Visual Communications Company - VCCIn Stock: 626MB403-A28-CA Datasheet

Current PartRFQ

MB403-A24-CA

Visual Communications Company - VCCIn Stock: 946MB403-A24-CA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MB403-A28-CA are identified based on the following criteria:

Matching Parameters (Required for Substitution):

• Series: MB403
• Base Type: Miniature Bayonet (BA9S)
• Size / Dimension: T - 3 1/4
• Color: Amber
• Wavelength: 592nm
• Millicandela Rating: 2180mcd
• Configuration: Single
• Product Status: Active
• RoHS Status: ROHS3 Compliant

Variable Parameter (Allows Substitution Grouping):

• Voltage - Forward (Vf) (Typ): Different voltage ratings within the MB403 series allow substitution when the application circuit voltage matches the lamp specification.

The MB403-A24-CA is grouped as a substitute because it shares all matching parameters with the MB403-A28-CA but operates at 24V instead of 28V. Substitution is valid only when the host circuit voltage specification matches the lamp forward voltage rating.

Parameter Comparison

Engineering Selection Recommendations

Both the MB403-A28-CA and MB403-A24-CA are active-status products manufactured by VCC with ROHS3 compliance and REACH unaffected status. Selection between these parts is determined solely by the circuit voltage requirement:

• Select MB403-A28-CA for 28V circuit applications
• Select MB403-A24-CA for 24V circuit applications

Both parts share identical mechanical form factor (T-3 1/4 miniature bayonet base), optical output (2180mcd amber at 592nm wavelength), and regulatory compliance. Substitution is valid only when the host circuit voltage matches the lamp forward voltage specification.

Frequently Asked Questions (FAQ)

Q: Can MB403-A24-CA replace MB403-A28-CA in a 28V circuit?

A: No. The MB403-A24-CA is rated for 24V operation. Installing a 24V lamp in a 28V circuit will result in overvoltage stress and reduced lamp life. Use only the MB403-A28-CA for 28V applications.

Q: Can MB403-A28-CA replace MB403-A24-CA in a 24V circuit?

A: No. The MB403-A28-CA is rated for 28V operation. Installing a 28V lamp in a 24V circuit will result in reduced brightness and potential underdrive conditions. Use only the MB403-A24-CA for 24V applications.

Q: Are the mechanical dimensions identical between these parts?

A: Yes. Both MB403-A28-CA and MB403-A24-CA use the T-3 1/4 form factor with miniature bayonet (BA9S) base. Mechanical interchangeability is confirmed; electrical compatibility depends on circuit voltage.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both MB403-A28-CA and MB403-A24-CA are ROHS3 compliant, REACH unaffected, and carry the same ECCN (EAR99) and HTSUS (8541.41.0000) classifications.

Q: What is the optical output difference between these parts?

A: Both parts deliver identical optical specifications: 2180 millicandela amber output at 592nm wavelength. Optical performance is equivalent; voltage rating is the only functional difference.