Molex 0382110421 Equivalent & Substitute Parts

Part Overview

The Molex 0382110421 is a 21-circuit barrier block connector from the Beau 38211 series, designed for chassis and panel mounting applications. This connector features a 0.563" (14.30mm) pitch with dual-wall barrier construction and supports 30A current at 300V. The product is currently obsolete, making equivalent substitutes necessary for ongoing maintenance, repair, and system upgrades where this connector type is specified.

Substiute Parts

0382110421

MolexIn Stock: 7410382110421 Datasheet

Current PartRFQ

TB300-21

Eaton - Bussmann Electrical DivisionIn Stock: 971TB300-21 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the Molex 0382110421 is determined by the following critical parameters:

• Circuit Count & Pitch Compatibility: The substitute must accommodate 21 circuits with a pitch of 0.562"-0.563" (14.27-14.30mm) to ensure mechanical fit within existing mounting footprints.
• Electrical Ratings: The substitute must support minimum 30A current and 300V voltage to meet or exceed the original specification.
• Barrier Construction: Dual-wall (2 Wall) barrier type is required for electrical isolation and safety compliance.
• Wire Gauge Range: The substitute must accept 10-18 AWG wire or a compatible range that includes this specification.
• Mounting & Termination: Chassis/panel mounting with screw termination (top) and closed bottom termination.
• Compliance & Material: UL94 V-0 flammability rating and RoHS compliance ensure regulatory alignment.

The Eaton Bussmann TB300-21 meets these substitution criteria with compatible electrical and mechanical parameters.

Parameter Comparison

Engineering Selection Recommendations

The Eaton Bussmann TB300-21 is the qualified substitute for the obsolete Molex 0382110421. Selection is based on the following engineering factors:

• Product Status Alignment: The TB300-21 is active and in production, ensuring long-term availability and supply chain continuity for the Molex 0382110421 obsolete part.
• Electrical Performance: The TB300-21 exceeds the original voltage specification (600V vs. 300V) while maintaining identical current rating (30A), providing enhanced margin for electrical safety.
• Mechanical Compatibility: Pitch tolerance of ±0.03mm between 0.562" and 0.563" is within standard PCB and mounting hole tolerances, ensuring direct mechanical fit.
• Wire Gauge Flexibility: The expanded wire gauge range (8-22 AWG vs. 10-18 AWG) accommodates the original specification while providing additional application flexibility.
• Regulatory Compliance: Both parts maintain UL94 V-0 flammability rating and RoHS compliance, ensuring no degradation in safety or environmental standards.
• Certification Parity: Both connectors are certified to equivalent safety and compliance standards, supporting direct substitution in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the Eaton TB300-21 be used as a direct replacement for the Molex 0382110421 in existing assemblies?

A: Yes. The TB300-21 is mechanically and electrically compatible. The pitch tolerance of ±0.03mm is within standard manufacturing tolerances for PCB mounting holes and chassis cutouts. Electrical ratings meet or exceed the original specification.

Q: What is the pitch tolerance between 0.562" and 0.563"?

A: The difference is 0.001" (0.025mm), which is well within standard PCB tolerance of ±0.010" (±0.25mm) and chassis mounting tolerances. This ensures proper fit without modification.

Q: Does the TB300-21 accept the same wire gauge as the original part?

A: The TB300-21 accepts 8-22 AWG wire, which encompasses the original 10-18 AWG specification. Wiring using 10-18 AWG will function identically in the substitute connector.

Q: Are there any material or temperature differences between these connectors?

A: The Molex uses phenolic insulation rated to 150°C, while the Eaton TB300-21 uses thermoplastic insulation rated to -40°C to 130°C. The Eaton's lower maximum temperature (130°C vs. 150°C) should be verified against your application's thermal requirements. Both maintain UL94 V-0 flammability rating.

Q: Is the TB300-21 available in the same packaging as the original?

A: The TB300-21 is supplied in bulk packaging, whereas the original Molex part packaging is not specified. Verify packaging requirements for your procurement and assembly processes.

Q: Are screw terminals included with the TB300-21?

A: Yes. The TB300-21 includes screw terminals, whereas the original Molex 0382110421 specifies screws are not included. Verify screw specifications and material (steel with zinc finish on the TB300-21) for your application.