BBD-128-G-G Equivalent & Substitute Parts

Part Overview

The BBD-128-G-G is a rectangular connector header manufactured by Samtec Inc., designed for through-hole board-to-board applications. This vertical header features 56 positions arranged in 2 rows with 0.100" (2.54mm) pitch spacing. The connector is actively produced and maintains full RoHS3 compliance with MSL Level 1 rating, making it suitable for standard industrial and commercial electronics assembly.

Substitute parts are identified based on matching core electrical and mechanical parameters within the BBD series, allowing for design flexibility when the primary part number is unavailable or when specific stacking height requirements necessitate alternative configurations.

Substiute Parts

BBD-128-G-G

Samtec Inc.In Stock: 840BBD-128-G-G Datasheet

Current PartRFQ

BBD-128-G-A

Samtec Inc.In Stock: 971BBD-128-G-A Datasheet

MFR RecommendedRFQ

BBD-128-G-B

Samtec Inc.In Stock: 987BBD-128-G-B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution within the BBD-128 series is determined by the following invariant parameters that must remain constant across all equivalent parts:

• Connector Type: Header
• Contact Type: Male Pin
• Number of Positions: 56
• Number of Rows: 2
• Pitch - Mating: 0.100" (2.54mm)
• Row Spacing - Mating: 0.100" (2.54mm)
• Mounting Type: Through Hole
• Termination: Solder
• Fastening Type: Push-Pull
• Contact Shape: Circular
• Insulation Material: Polyester, Glass Filled
• Operating Temperature Range: -55°C ~ 125°C
• Contact Finish - Mating: Gold
• Contact Finish - Post: Nickel
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The primary variable parameter distinguishing substitute parts is the Overall Contact Length and corresponding Insulation Height, which determines the stacking height of the assembled connector. This variation allows selection based on specific PCB stack-up requirements while maintaining full electrical and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

All three parts—BBD-128-G-G, BBD-128-G-A, and BBD-128-G-B—maintain identical electrical specifications, contact configurations, and compliance certifications. Selection between these parts is determined solely by mechanical fit requirements within the target application.

BBD-128-G-G provides the maximum overall contact length of 0.835" (21.21mm) with an insulation height of 0.585" (14.86mm), suitable for applications requiring extended post length or greater standoff distance from the PCB.

BBD-128-G-A offers the minimum profile with an overall contact length of 0.460" (11.68mm) and insulation height of 0.211" (5.35mm), appropriate for space-constrained designs or low-profile board stacks.

BBD-128-G-B provides an intermediate configuration with an overall contact length of 0.585" (14.86mm) and insulation height of 0.335" (8.51mm), serving applications with moderate height requirements.

All parts are actively produced by Samtec Inc., maintain ROHS3 compliance, and carry MSL Level 1 rating. Interchangeability is guaranteed when mechanical envelope constraints are satisfied.

Frequently Asked Questions (FAQ)

Q: Can BBD-128-G-A, BBD-128-G-B, and BBD-128-G-G be used interchangeably?

A: These parts are electrically and functionally equivalent but differ in overall contact length and insulation height. Interchangeability depends on the mechanical constraints of your PCB stack-up. Verify that the selected part's dimensions fit within your design envelope before substitution.

Q: What determines the choice between these three part numbers?

A: The primary selection criterion is the required stacking height. BBD-128-G-A is the lowest profile option, BBD-128-G-B is intermediate, and BBD-128-G-G provides maximum height. Choose based on your specific PCB thickness and connector clearance requirements.

Q: Are all three parts RoHS3 compliant?

A: Yes. BBD-128-G-G, BBD-128-G-A, and BBD-128-G-B are all ROHS3 compliant with MSL Level 1 rating, meeting standard industrial compliance requirements.

Q: Do these connectors support the same mating pitch and row spacing?

A: Yes. All three parts maintain identical mating pitch of 0.100" (2.54mm) and row spacing of 0.100" (2.54mm), ensuring compatibility with standard 0.1" grid PCB layouts and mating connectors.

Q: What is the operating temperature range for these connectors?

A: All three parts operate across the range of -55°C to 125°C, providing consistent thermal performance across the substitute group.

Q: Are contact finishes identical across all three parts?

A: Yes. All parts feature gold-plated mating contacts (20.0µin / 0.51µm) and nickel-plated posts (50.0µin / 1.27µm), ensuring consistent electrical performance and corrosion resistance.