Molex 0382800409 Equivalent & Substitute Parts

Part Overview

The Molex 0382800409 is a 9-circuit barrier block connector from the Beau 38280 series, designed for chassis and panel mounting applications. This component features a 0.688" (17.48mm) pitch with dual-wall barrier construction, rated for 50A at 300V, and accommodates wire gauges from 6-18 AWG. The product is currently obsolete, making identification of compatible substitute components essential for ongoing maintenance, repair, and system upgrades where this connector type is specified.

Substiute Parts

0382800409

MolexIn Stock: 11060382800409 Datasheet

Current PartRFQ

TB400-09

Eaton - Bussmann Electrical DivisionIn Stock: 1105TB400-09 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the Molex 0382800409 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Terminal block type (Barrier Block)
• Number of circuits (9)
• Pitch tolerance (0.688" ± acceptable mechanical variance)
• Number of rows (2)
• Barrier construction (2 Wall/Dual)
• Mounting configuration (Chassis/Panel)
• Top termination method (Screw-based)
• Bottom termination (Closed)

Secondary Compatibility Criteria:

• Current rating (minimum 50A)
• Voltage rating (minimum 300V)
• Wire gauge accommodation (minimum 6-18 AWG range)
• Flange feature presence
• Color consistency (Black)
• Insulation material compatibility
• UL94 V-0 flammability rating

The Eaton Bussmann TB400-09 meets all primary criteria and exceeds secondary electrical specifications, making it a direct functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The Eaton Bussmann TB400-09 is a direct functional substitute for the obsolete Molex 0382800409 based on the following engineering criteria:

Mechanical Compatibility: The TB400-09 maintains identical circuit count (9), row configuration (2), barrier construction (dual-wall), and mounting methodology (chassis/panel). The pitch variance of 0.03mm (0.687" vs 0.688") is within standard mechanical tolerance for barrier block connectors and does not affect mounting or mating compatibility.

Electrical Superiority: The substitute component exceeds the original specification with 75A current rating versus 50A, and 600V voltage rating versus 300V. These enhanced ratings provide increased design margin and system reliability.

Regulatory Compliance: Both components achieve UL94 V-0 flammability certification and RoHS compliance, meeting modern regulatory requirements. The TB400-09 is currently active in production, ensuring long-term availability and supply chain stability.

Wire Gauge Consideration: The TB400-09 accommodates 6-14 AWG wire, which is a subset of the original 6-18 AWG range. Applications utilizing 16-18 AWG conductors require verification that the substitute's terminal design provides adequate contact pressure and retention for these larger gauges.

Temperature Operating Range: The TB400-09 supports -40°C to 130°C operation, exceeding the original 105°C maximum, providing enhanced thermal margin for demanding environments.

Frequently Asked Questions (FAQ)

Q: Can the Eaton TB400-09 directly replace the Molex 0382800409 in existing installations?

A: Yes, the TB400-09 is mechanically and electrically compatible. The 0.03mm pitch variance is within standard tolerance. Verify that wire gauges in your application fall within the 6-14 AWG range supported by the substitute.

Q: What is the significance of the pitch difference (0.688" vs 0.687")?

A: The 0.03mm variance represents a 0.04% difference and is within standard mechanical tolerance for barrier block connectors. This does not affect mounting hole alignment, mating compatibility, or electrical performance.

Q: Why does the TB400-09 support only 6-14 AWG when the original supports 6-18 AWG?

A: The TB400-09 terminal design is optimized for the 6-14 AWG range. Applications using 16-18 AWG conductors should verify terminal contact pressure and retention specifications with the manufacturer before substitution.

Q: Are there any material differences between the two components?

A: The Molex uses phenolic insulation while the Eaton uses thermoplastic insulation. Both achieve identical UL94 V-0 flammability ratings. The thermoplastic material in the TB400-09 provides improved moisture resistance and wider operating temperature range.

Q: What is the availability status of each component?

A: The Molex 0382800409 is obsolete with 1044 units in current inventory. The Eaton TB400-09 is active production with 1053 units in stock, ensuring ongoing availability for future requirements.

Q: Do the electrical rating differences affect substitution suitability?

A: No. The TB400-09's higher current (75A vs 50A) and voltage (600V vs 300V) ratings provide increased design margin and do not create compatibility issues. The substitute is rated for all applications within the original component's specifications.

Q: Are screw terminals included with both components?

A: The Molex 0382800409 is supplied without screws. The Eaton TB400-09 includes screws as part of the standard package, reducing assembly requirements.