ASMB-TTB0-0A3A2 Equivalent & Substitute Parts

Part Overview

The ASMB-TTB0-0A3A2 is a 6-SMD RGB LED indicator from Broadcom Limited featuring independent red, green, and blue channels with diffused lens transparency. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates at 2.1V forward voltage for red and 2.9V for green and blue channels, with a 20mA test current per color channel.

Key Parameters

Parameter	Value
Manufacturer Part Number	ASMB-TTB0-0A3A2
Manufacturer	Broadcom Limited
Color Configuration	Red, Green, Blue (RGB) Independent
Lens Transparency	Diffused
Lens Style	Round with Flat Top
Voltage - Forward (Vf) Typical	2.1V Red, 2.9V Green, 2.9V Blue
Current - Test	20mA Red, 20mA Green, 20mA Blue
Viewing Angle	115°
Mounting Type	Surface Mount
Package / Case	6-SMD, J-Lead
Size / Dimension	4.60mm L x 4.60mm W
Height (Max)	2.80mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution for the ASMB-TTB0-0A3A2 is determined by the following critical parameters:

Color Configuration: Red, Green, Blue (RGB) independent channels
Lens Transparency: Diffused
Lens Style: Round with Flat Top
Voltage - Forward (Vf): 2.1V Red, 2.9V Green, 2.9V Blue
Current - Test: 20mA per channel
Mounting Type: Surface Mount
Package Type: 6-PLCC configuration
Wavelength Ranges: Red (620-635nm), Green (518-530nm), Blue (464-471nm)

The identified substitute parts ASMB-TTF2-0B20B and ASMB-TTF0-0A20B maintain electrical compatibility across all color channels and mechanical compatibility with the original package footprint. Both substitutes are active products with current manufacturing status, addressing the obsolescence of the original part.

Parameter Comparison

Parameter	ASMB-TTB0-0A3A2 (Original)	ASMB-TTF2-0B20B (Substitute)	ASMB-TTF0-0A20B (Substitute)
Manufacturer	Broadcom Limited	Broadcom Limited	Broadcom Limited
Color Configuration	Red, Green, Blue (RGB)	Red, Green, Blue (RGB)	Red, Green, Blue (RGB)
Lens Transparency	Diffused	Diffused	Diffused
Lens Style	Round with Flat Top	Round with Flat Top	Round with Flat Top
Voltage - Forward (Vf) Typical	2.1V Red, 2.9V Green, 2.9V Blue	2.1V Red, 2.9V Green, 2.9V Blue	2.1V Red, 2.9V Green, 2.9V Blue
Current - Test	20mA Red, 20mA Green, 20mA Blue	20mA	20mA
Viewing Angle	115°	110°	110°
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-SMD, J-Lead	6-PLCC	6-PLCC
Size / Dimension	4.60mm L x 4.60mm W	3.70mm L x 4.60mm W	3.70mm L x 4.60mm W
Height (Max)	2.80mm	3.00mm	3.00mm
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)	5A (24 Hours)	5A (24 Hours)
Wavelength - Dominant	621nm Red, 530nm Green, 470nm Blue	620nm Red, 524nm Green, 471nm Blue	620nm Red, 524nm Green, 471nm Blue
Wavelength - Peak	635nm Red, 521nm Green, 464nm Blue	628nm Red, 518nm Green, 467nm Blue	628nm Red, 518nm Green, 467nm Blue

Engineering Selection Recommendations

Both ASMB-TTF2-0B20B and ASMB-TTF0-0A20B are active products from Broadcom Limited and maintain full ROHS3 compliance and REACH unaffected status, matching the regulatory requirements of the original ASMB-TTB0-0A3A2.

The ASMB-TTF2-0B20B is supplied in Tape & Reel (TR) packaging with 11,285 pieces in stock inventory. The ASMB-TTF0-0A20B is supplied in Cut Tape (CT) & Digi-Reel® packaging with 201,222 pieces in stock inventory, providing greater availability for high-volume applications.

Both substitutes operate at identical forward voltages and test currents across all color channels. The viewing angle decreases from 115° to 110°, and physical dimensions increase slightly (3.70mm L x 4.60mm W versus 4.60mm L x 4.60mm W, with height increasing from 2.80mm to 3.00mm). Moisture sensitivity level increases from MSL 4 to MSL 5A, requiring adjusted handling protocols during storage and assembly.

Frequently Asked Questions (FAQ)

Q: Are ASMB-TTF2-0B20B and ASMB-TTF0-0A20B electrically compatible with ASMB-TTB0-0A3A2?

A: Yes. Both substitutes maintain identical forward voltages (2.1V Red, 2.9V Green, 2.9V Blue) and test currents (20mA per channel), ensuring direct electrical compatibility in existing circuit designs.

Q: What are the physical differences between the original and substitute parts?

A: The substitute parts are slightly larger: 3.70mm L x 4.60mm W versus 4.60mm L x 4.60mm W, with height increasing from 2.80mm to 3.00mm. The viewing angle decreases from 115° to 110°. PCB layout and clearance verification is required before implementation.

Q: How do the packaging options differ between the two substitutes?

A: ASMB-TTF2-0B20B is supplied in Tape & Reel (TR) format, suitable for automated pick-and-place assembly. ASMB-TTF0-0A20B is supplied in Cut Tape (CT) & Digi-Reel® format, offering flexibility for both manual and automated assembly processes.

Q: What is the impact of the increased Moisture Sensitivity Level (MSL)?

A: The original part has MSL 4 (72 Hours), while both substitutes have MSL 5A (24 Hours). This requires stricter moisture control during storage and a shorter time window between package opening and soldering. Baking procedures may be necessary if the 24-hour limit is exceeded.

Q: Are both substitutes available in sufficient quantity for production?

A: ASMB-TTF0-0A20B has 201,222 pieces in stock, providing substantial availability. ASMB-TTF2-0B20B has 11,285 pieces in stock. Inventory levels support both prototype and production-volume applications.

Q: Do the substitutes maintain the same regulatory compliance as the original part?

A: Yes. Both substitutes are ROHS3 compliant and REACH unaffected, matching the regulatory status of ASMB-TTB0-0A3A2.

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