MB403-A28-CA-BP LED Lamp Equivalent & Substitute Parts

Part Overview

The MB403-A28-CA-BP is an amber LED lamp replacement with Miniature Bayonet (BA9S) base designed for 28V applications. This component is classified as Obsolete, necessitating identification of active equivalent and substitute parts for continued system support and procurement. The lamp features a T-3 1/4 form factor with 592nm wavelength output and 2180mcd brightness rating, suitable for general purpose lighting applications. Active alternatives within the MB403 series provide functional equivalence across different voltage ratings and packaging configurations.

Key Parameters

Parameter	Value
Manufacturer Part Number	MB403-A28-CA-BP
Manufacturer	Visual Communications Company - VCC
Series	MB403
Base Type	Miniature Bayonet (BA9S)
Size / Dimension	T - 3 1/4
Color	Amber
Wavelength	592nm
Voltage - Forward (Vf) (Typ)	28V
Millicandela Rating	2180mcd
Configuration	Single
Applications	General Purpose Lighting
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
ECCN	EAR99
HTSUS	8541.41.0000

Substitute Part Grouping Explanation

Substitution within the MB403 series is determined by the following critical parameters that must remain constant:

Fixed Parameters (Non-Negotiable for Substitution):

Base Type: Miniature Bayonet (BA9S)
Size / Dimension: T - 3 1/4
Color: Amber
Wavelength: 592nm
Millicandela Rating: 2180mcd
Configuration: Single
Applications: General Purpose Lighting

Variable Parameter (Determines Voltage-Specific Substitution):

Voltage - Forward (Vf) (Typ): 6V, 15V, 24V, or 28V

The MB403-A28-CA-BP operates at 28V. Direct substitutes must maintain identical mechanical and optical characteristics while accommodating system voltage requirements. Parts with different voltage ratings (6V, 15V, 24V) are classified as parametric equivalents suitable only for systems designed for those specific voltage levels.

Parameter Comparison

Parameter	MB403-A28-CA-BP	MB403-A28-CA	MB403-A28AC-CA	MB403-A24-CA	MB403-A15-CA	MB403-A6AC-CA	MB403-A6AC-CW
Manufacturer	VCC	VCC	VCC	VCC	VCC	VCC	VCC
Series	MB403	MB403	MB403	MB403	MB403	MB403	MB403
Base Type	BA9S	BA9S	BA9S	BA9S	BA9S	BA9S	BA9S
Size / Dimension	T - 3 1/4	T - 3 1/4	T - 3 1/4	T - 3 1/4	T - 3 1/4	T - 3 1/4	T - 3 1/4
Color	Amber	Amber	Amber	Amber	Amber	Amber	Amber
Wavelength	592nm	592nm	592nm	592nm	592nm	592nm	592nm
Voltage - Forward (Vf) (Typ)	28V	28V	28V	24V	15V	6V	6V
Millicandela Rating	2180mcd	2180mcd	2180mcd	2180mcd	2180mcd	2180mcd	2180mcd
Configuration	Single	Single	Single	Single	Single	Single	Single
Product Status	Obsolete	Active	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging	-	Bulk	Bulk	Bulk	Bulk	Bulk	Bulk

Engineering Selection Recommendations

Primary Substitute for 28V Systems:

MB403-A28-CA is the direct active equivalent to MB403-A28-CA-BP. Both components operate at 28V with identical mechanical, optical, and electrical specifications. MB403-A28-CA carries Active product status and is available in Bulk packaging with 604 units in stock. This part maintains full ROHS3 compliance and REACH Unaffected status, meeting current regulatory requirements.

Secondary 28V Substitute:

MB403-A28AC-CA provides functional equivalence at 28V with identical performance parameters. This variant is Active with 891 units in stock and maintains ROHS3 compliance and REACH Unaffected status. Selection between MB403-A28-CA and MB403-A28AC-CA depends on procurement availability and packaging requirements.

Voltage-Specific Alternatives:

For systems operating at different voltage levels, the following active substitutes are available:

24V systems: MB403-A24-CA (936 units in stock)
15V systems: MB403-A15-CA (770 units in stock)
6V systems: MB403-A6AC-CA or MB403-A6AC-CW (741 and 786 units respectively)

All substitute parts maintain identical mechanical form factor (T-3 1/4 BA9S), optical output (592nm, 2180mcd), and regulatory compliance (ROHS3, EAR99, HTSUS 8541.41.0000).

Frequently Asked Questions (FAQ)

Q: Can MB403-A28-CA directly replace MB403-A28-CA-BP?

A: Yes. MB403-A28-CA is a direct functional equivalent with identical voltage (28V), base type (BA9S), form factor (T-3 1/4), color (Amber), wavelength (592nm), and brightness (2180mcd). The primary difference is product status: MB403-A28-CA is Active while MB403-A28-CA-BP is Obsolete.

Q: What is the difference between MB403-A28-CA and MB403-A28AC-CA?

A: Both parts operate at 28V with identical electrical and optical specifications. The difference lies in internal construction or processing designation indicated by the "AC" suffix in MB403-A28AC-CA. Both are Active, ROHS3 compliant, and mechanically interchangeable.

Q: Can I use MB403-A24-CA in a 28V circuit?

A: No. MB403-A24-CA is rated for 24V operation. Using it in a 28V circuit will result in overvoltage stress and component failure. Voltage rating must match system design specifications.

Q: Are all MB403 series lamps mechanically identical?

A: Yes. All MB403 variants in this comparison share identical mechanical specifications: T-3 1/4 form factor, Miniature Bayonet (BA9S) base, Amber color, 592nm wavelength, and 2180mcd brightness. Differences exist only in forward voltage rating.

Q: What packaging options are available?

A: MB403-A28-CA-BP is supplied with "-" packaging designation (original specification). All active substitutes are available in Bulk packaging, suitable for component procurement and integration workflows.

Q: Are all these parts RoHS compliant?

A: Yes. All parts listed—MB403-A28-CA, MB403-A28AC-CA, MB403-A24-CA, MB403-A15-CA, MB403-A6AC-CA, and MB403-A6AC-CW—are ROHS3 compliant. Most also carry REACH Unaffected status where specified.

Q: Which 28V substitute has the highest inventory availability?

A: MB403-A28AC-CA has the highest inventory with 891 units in stock, followed by MB403-A28-CA with 604 units.

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