Terminal Block Connector 305120 Equivalent & Substitute Parts

Part Overview

The American Electrical 305120 is a 2-position feed-through terminal block connector rated for 12-26 AWG wire gauges. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new designs. The 305120 operates at 750V IEC / 600V UL with a 26A current rating and features screw termination with polyamide insulation material rated UL94 V-2.

Substiute Parts

305120

American ElectricalIn Stock: 1092305120 Datasheet

Current PartRFQ

304129

American Electrical Inc.In Stock: 2771304129 Datasheet

SimilarRFQ

304209

American Electrical Inc.In Stock: 1292304209 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 305120 is determined by the following critical parameters:

• Electrical Compatibility: Voltage rating (IEC/UL), current rating (IEC/UL), and wire gauge range must meet or exceed the original specification
• Mechanical Compatibility: Number of positions (2), number of levels (1), termination style (screw), and terminal width must support equivalent connection density
• Material & Compliance: Insulation material flammability rating (UL94 V-2), RoHS3 compliance, and REACH status must align with regulatory requirements
• Physical Characteristics: Color (beige), stripping length (10mm), and connector type (feed through) must match application requirements

The substitute parts 304129 and 304209 are both from the American Electrical AVK series and maintain compatibility across these critical parameters while offering active product status.

Parameter Comparison

Engineering Selection Recommendations

304129 (AVK 2.5 FT): This substitute maintains full compliance with ROHS3 and REACH requirements. The polyamide insulation material with UL94 V-2 rating matches the original specification. Current ratings are reduced to 24A (IEC) and 20A (UL) compared to the 305120, and terminal width is reduced from 6.0mm to 5.0mm. This part is actively manufactured and available in production quantities.

304209 (AVK 2.5 RD): This substitute also maintains ROHS3 and REACH compliance with identical electrical and wire gauge specifications to 304129. The insulation material is specified as thermoplastic without a documented flammability rating, differing from the original polyamide PA66 material. Current ratings are 24A (IEC) and 20A (UL). This part is actively manufactured and available in production quantities.

Both substitutes are suitable for applications where the reduced current ratings (20-24A versus 26A) and terminal width (5.0mm versus 6.0mm) are acceptable within the system design constraints.

Frequently Asked Questions (FAQ)

Q: Can 304129 or 304209 directly replace 305120 in existing assemblies?

A: Both parts maintain the same 2-position, single-level feed-through configuration with screw termination and 12-26 AWG wire gauge compatibility. The reduced terminal width (5.0mm versus 6.0mm) and current ratings (20-24A versus 26A) must be evaluated against your specific application requirements. Mechanical fit and electrical load capacity should be confirmed before implementation.

Q: What is the difference between 304129 and 304209?

A: Both parts are from the AVK series with identical electrical ratings (24A IEC, 20A UL, 750V IEC, 600V UL) and wire gauge specifications. The primary difference is insulation material: 304129 uses polyamide (PA66) with UL94 V-2 rating, while 304209 uses thermoplastic material without a specified flammability rating. Select based on your application's flammability and material requirements.

Q: Are the substitute parts RoHS and REACH compliant?

A: Yes, both 304129 and 304209 are ROHS3 compliant and REACH unaffected, matching the compliance status of the original 305120.

Q: What is the significance of the terminal width reduction from 6.0mm to 5.0mm?

A: Terminal width affects the physical spacing and mounting density of the connector. The 1.0mm reduction may impact PCB layout or panel mounting configurations. Verify that your mechanical design accommodates the narrower terminal width before substitution.

Q: Why is the 305120 obsolete?

A: The 305120 is classified as obsolete by the manufacturer. The active AVK series substitutes (304129 and 304209) represent the current product line for equivalent 2-position feed-through terminal block applications.