Terminal Block Connector 331120 Equivalent & Substitute Parts

Part Overview

The American Electrical 331120 is a 2-position ground terminal block connector designed for wire gauges 12-26 AWG (0.5-4mm²). This component features screw termination, polyamide insulation with UL94 V-2 flammability rating, and is compliant with RoHS3 and REACH standards. The product is classified as obsolete, making identification of suitable substitute components essential for ongoing system maintenance and new design implementations.

Substiute Parts

331120

American ElectricalIn Stock: 820331120 Datasheet

Current PartRFQ

334120

American Electrical Inc.In Stock: 2067334120 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 331120 is determined by the following critical parameters:

• Number of Positions and Levels: Must remain 2 positions, 1 level to maintain circuit topology compatibility
• Termination Style: Must be screw termination for mechanical and electrical consistency
• Wire Gauge Compatibility: Substitute must accommodate the 12-26 AWG range or a compatible superset range
• Material and Flammability: Polyamide insulation with UL94 V-2 rating ensures thermal and safety performance
• Connector Type: Ground/Earth terminal block designation must be preserved
• Compliance Standards: RoHS3 and REACH compliance required for regulatory alignment

The substitute part 334120 meets these criteria with the following considerations: it maintains 2-position, 1-level configuration with screw termination and identical insulation material and flammability rating. The wire gauge range expands to 10-26 AWG, providing broader compatibility. Terminal width increases from 5.0mm to 6.0mm, and stripping length reduces from 12mm to 10mm.

Parameter Comparison

Engineering Selection Recommendations

The 334120 is a suitable substitute for the obsolete 331120 based on the following factors:

Compliance and Regulatory Status: Both components maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory alignment for current and future applications. The 334120 carries active product status, providing long-term availability and supply chain stability compared to the obsolete 331120.

Functional Equivalence: Both components preserve the 2-position, 1-level ground terminal block configuration with screw termination. Identical insulation material (Polyamide PA66) and flammability rating (UL94 V-2) ensure thermal and safety performance parity.

Wire Gauge Accommodation: The 334120 expands the wire gauge range to 10-26 AWG, encompassing the original 12-26 AWG specification. This broader range provides enhanced flexibility for wire selection without compromising the original design intent.

Physical Dimensional Considerations: The terminal width increase from 5.0mm to 6.0mm and stripping length reduction from 12mm to 10mm represent minor mechanical variations. These changes must be evaluated against specific PCB layout constraints and installation procedures in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 334120 directly replace the 331120 in existing designs?

A: The 334120 maintains functional equivalence in terms of position count, termination method, and electrical safety ratings. However, the increased terminal width (6.0mm vs. 5.0mm) and reduced stripping length (10mm vs. 12mm) require verification against specific PCB footprint and installation requirements before implementation.

Q: What is the significance of the expanded wire gauge range in the 334120?

A: The 334120 accommodates 10-26 AWG compared to the 331120's 12-26 AWG range. This expansion allows connection of larger diameter conductors (10 AWG) while maintaining compatibility with the original specification range. Applications utilizing only 12-26 AWG wires experience no functional change.

Q: Are there compliance differences between the two components?

A: Both components maintain identical RoHS3 and REACH compliance status. The 334120's active product status ensures ongoing regulatory monitoring and supply chain availability, whereas the 331120's obsolete status limits future sourcing options.

Q: How do the terminal width and stripping length differences affect installation?

A: Terminal width affects PCB layout spacing and connector density. Stripping length impacts wire preparation procedures. Both parameters must be cross-referenced with application-specific installation documentation and equipment specifications to ensure compatibility.

Q: What is the wire gauge specification difference between mm² ratings?

A: The 331120 specifies 0.5-4mm² while the 334120 specifies 4mm². The 334120's specification represents the maximum cross-sectional area. For applications using conductors within the 0.5-4mm² range, both components provide equivalent accommodation.