TE Connectivity AMP Connectors 1546724-3 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1546724-3 is a 3-circuit barrier block terminal connector with 0.375" (9.53mm) pitch spacing, designed for through-hole mounting applications. This component features dual-wall barrier construction, screw-based top termination, and PC pin insulated bottom termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new design implementations.

Substiute Parts

1546724-3

TE Connectivity AMP ConnectorsIn Stock: 8031546724-3 Datasheet

Current PartRFQ

2-1546724-6

TE Connectivity AMP ConnectorsIn Stock: 9972-1546724-6 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 1546724-3 is determined by strict equivalence across the following critical parameters:

Electrical Compatibility Parameters:

• Current Rating: 20A
• Voltage Rating: 300V
• Wire Gauge Acceptance: 12-22 AWG

Mechanical Compatibility Parameters:

• Terminal Block Type: Barrier Block
• Number of Circuits: 3
• Pitch: 0.375" (9.53mm)
• Number of Rows: 1
• Top Termination Method: Screws
• Bottom Termination Type: PC Pin, Insulated
• Barrier Configuration: 2 Wall (Dual)
• Mounting Type: Through Hole

Environmental & Compliance Parameters:

• Operating Temperature: 105°C
• Insulation Material: Polypropylene (PP)
• Flammability Rating: UL94 V-0
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute part 2-1546724-6 maintains full equivalence across all critical parameters. Variations in terminal screw material (Brass vs. Copper) and finish (Nickel vs. Tin) do not affect functional compatibility within the specified electrical and thermal operating envelope.

Parameter Comparison

Engineering Selection Recommendations

The 2-1546724-6 serves as the direct active substitute for the obsolete 1546724-3. Selection of this substitute is based on the following engineering criteria:

Product Status Alignment: The substitute part maintains active product status with TE Connectivity AMP Connectors, ensuring continued availability, technical support, and supply chain reliability. The main part's obsolete classification necessitates transition to the active equivalent.

Electrical & Mechanical Equivalence: All critical electrical parameters (20A current rating, 300V voltage rating, 12-22 AWG wire gauge acceptance) and mechanical specifications (3-circuit configuration, 0.375" pitch, dual-wall barrier construction, through-hole mounting) are identical between the main part and substitute.

Compliance & Certification Parity: Both parts maintain UL94 V-0 flammability rating, identical operating temperature range (105°C), and equivalent moisture sensitivity classification (MSL 1). RoHS compliance is confirmed for both parts, with the substitute meeting current RoHS standards.

Terminal Material Variation: The substitute incorporates brass terminal screws with nickel finish, compared to copper with tin finish in the main part. Both material combinations provide equivalent electrical conductivity and corrosion resistance within the specified 300V, 20A operating envelope and 105°C thermal environment. This variation does not impact functional performance or circuit reliability.

PCB Integration: Through-hole mounting configuration, PC pin insulated bottom termination, and flange-mounted design are identical, ensuring direct mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the 2-1546724-6 be used as a direct replacement for the 1546724-3 in existing designs?

A: Yes. The 2-1546724-6 maintains identical electrical ratings (20A, 300V), mechanical configuration (3-circuit, 0.375" pitch, dual-wall barrier), termination methods (screw top, PC pin insulated bottom), and environmental specifications (105°C operating temperature, UL94 V-0 flammability). Direct substitution is supported without design modification.

Q: What is the difference between the copper/tin and brass/nickel terminal screw finishes?

A: Both material combinations provide equivalent electrical conductivity and corrosion resistance within the specified operating parameters. Copper with tin finish and brass with nickel finish are functionally equivalent for this 20A, 300V barrier block application. Selection between them does not affect circuit performance or reliability.

Q: Are both parts RoHS compliant?

A: Yes. The main part 1546724-3 is ROHS3 compliant, and the substitute 2-1546724-6 is RoHS compliant. Both meet current regulatory requirements for hazardous substance restrictions.

Q: What is the pitch specification, and why is it critical for substitution?

A: Pitch is the center-to-center distance between adjacent circuits, specified as 0.375" (9.53mm) for both parts. This parameter is critical because it determines PCB footprint compatibility and wire entry spacing. Both the main part and substitute maintain identical pitch, ensuring mechanical fit on existing printed circuit boards.

Q: Can these barrier block connectors accept different wire gauges?

A: Yes. Both the 1546724-3 and 2-1546724-6 accept wire gauges from 12 AWG to 22 AWG. This range accommodates various conductor sizes within the 20A current rating specification.

Q: What does "2 Wall (Dual) Barrier Type" mean?

A: Dual-wall barrier construction provides electrical isolation between adjacent circuits through two parallel insulating walls. This configuration enhances safety and reduces crosstalk between circuit paths. Both the main part and substitute incorporate this dual-wall design.

Q: Is the flange mounting feature identical on both parts?

A: Yes. Both the 1546724-3 and 2-1546724-6 include flange-mounted design for through-hole PCB assembly. The flange provides mechanical stability and alignment during insertion and soldering.

Q: What is the operating temperature range for these connectors?

A: Both parts are rated for continuous operation at 105°C maximum. This temperature specification applies to the polypropylene insulation material used in both components.

Q: Why is the main part obsolete while the substitute is active?

A: Product lifecycle management results in obsolescence of older part numbers. The 2-1546724-6 represents the current active equivalent within the TE Connectivity AMP Connectors JC6 Buchanan series, offering identical functionality with continued manufacturer support and supply availability.

Q: Are there any inventory considerations when transitioning from the main part to the substitute?

A: The substitute 2-1546724-6 has 972 pieces in stock, compared to 719 pieces of the main part. Both are available as new original components. Transition planning should account for the obsolete status of the main part and prioritize procurement of the active substitute for new designs and replenishment orders.