TE Connectivity AMP Connectors 243 Terminal Block Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors model 243 is a 2-position terminal block featuring NEMA open construction with a 22.1mm terminal width. This component is designed for direct mount applications requiring tubular clamp termination at 65A UL current rating and 600V UL voltage rating. The product is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the specified electrical and mechanical parameters.

Substiute Parts

243

TE Connectivity AMP ConnectorsIn Stock: 1249243 Datasheet

Current PartRFQ

CBS4U

Altech CorporationIn Stock: 909CBS4U Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 243 terminal block is determined by the following critical parameters that must be maintained or exceeded:

Electrical Compatibility Requirements:

• Current rating of 65A UL minimum
• Voltage rating of 600V UL minimum
• Wire gauge accommodation of 6-18 AWG range

Mechanical Compatibility Requirements:

• 2-position configuration
• 1-level construction
• NEMA open construction type
• Polyamide (PA/Nylon) insulation material

Regulatory & Environmental Requirements:

• ROHS3 compliance
• Operating temperature support of 150°C or higher

The Altech Corporation CBS4U terminal block satisfies these substitution criteria through equivalent electrical ratings (65A UL / 600V UL), matching position and level configuration, compatible insulation material (Polyamide PA66), and ROHS3 compliance. While the CBS4U features a narrower 13.0mm terminal width and screw termination (versus tubular clamp), these represent functional design variations within the NEMA open construction category that do not preclude substitution for applications within the specified electrical envelope.

Parameter Comparison

Engineering Selection Recommendations

The Altech Corporation CBS4U terminal block serves as an active equivalent for the obsolete TE Connectivity 243 based on the following engineering criteria:

Electrical Equivalence: Both components maintain identical UL current (65A) and voltage (600V) ratings, ensuring compatibility within the specified electrical operating envelope.

Regulatory Compliance: Both components achieve ROHS3 compliance, satisfying environmental and hazardous substance restrictions applicable to current procurement standards.

Functional Configuration: Both components provide 2-position, 1-level NEMA open construction with polyamide insulation, maintaining the core functional architecture required for terminal block applications.

Wire Gauge Consideration: The CBS4U accommodates 6-16 AWG, which overlaps the 243's 6-18 AWG range. Applications requiring 17-18 AWG termination require verification of alternative substitutes or retention of original stock.

Design Variations: The CBS4U incorporates screw termination and DIN rail mounting capability, representing design enhancements over the original tubular clamp and direct mount configuration. These variations do not compromise electrical performance within the specified parameter envelope.

Frequently Asked Questions (FAQ)

Q: Can the Altech CBS4U directly replace the TE Connectivity 243 in all applications?

A: The CBS4U provides electrical and regulatory equivalence for applications operating within 65A UL and 600V UL specifications. Wire gauge compatibility exists for 6-16 AWG. Applications requiring 17-18 AWG termination or specific direct mount mechanical requirements require evaluation of alternative substitutes or original part retention.

Q: What is the significance of the terminal width difference (22.1mm vs. 13.0mm)?

A: Terminal width represents the physical spacing between connection points. The CBS4U's narrower 13.0mm width reflects a more compact design footprint. This variation does not affect electrical performance but may impact physical installation space and mechanical fit within existing assemblies.

Q: How do the termination style differences affect substitution?

A: The 243 uses tubular clamp termination while the CBS4U uses screw termination. Both methods achieve equivalent electrical connection and current-carrying capacity at the specified 65A rating. Screw termination provides adjustable clamping force, while tubular clamp provides fixed engagement. Selection depends on application-specific assembly procedures and tooling availability.

Q: Are both components suitable for 150°C operating temperature applications?

A: The TE Connectivity 243 specifies 150°C operating temperature. The Altech CBS4U does not provide an operating temperature specification in the available data. Applications requiring confirmed 150°C operation should verify CBS4U thermal performance specifications with the manufacturer.

Q: What is the difference between UL and IEC current ratings shown for the CBS4U?

A: The CBS4U provides dual ratings: 65A UL and 57A IEC. For applications requiring UL compliance, the 65A rating applies. For IEC-regulated applications, the 57A rating applies. The TE Connectivity 243 specifies UL ratings only (65A UL).

Q: Does the DIN rail mounting capability of the CBS4U affect compatibility?

A: The CBS4U supports both channel and DIN rail mounting, providing installation flexibility beyond the 243's direct mount configuration. This represents a functional enhancement that does not preclude substitution. Existing direct mount applications may require mechanical adaptation or alternative mounting solutions.

Q: What packaging differences exist between these components?

A: The TE Connectivity 243 packaging specification is not provided. The Altech CBS4U is supplied in bulk packaging. Procurement requirements for specific packaging formats should be confirmed with component suppliers.