TE Connectivity AMP Connectors 1546721-4 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1546721-4 is a 4-circuit barrier block terminal connector with 0.375" (9.53mm) pitch spacing. This component is designed for wire-to-board applications requiring screw termination with captive plate assembly. The part is classified as Active product status and is RoHS Compliant with UL94 V-0 flammability rating. Substitute parts are identified when equivalent electrical ratings, mechanical configurations, and mounting specifications align with the original component's functional requirements.

Substiute Parts

1546721-4

TE Connectivity AMP ConnectorsIn Stock: 9331546721-4 Datasheet

Current PartRFQ

1906129

Phoenix ContactIn Stock: 11811906129 Datasheet

SimilarRFQ

T38111-04-0

Curtis IndustriesIn Stock: 829T38111-04-0 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1546721-4 are identified based on strict alignment of the following critical parameters:

Electrical Compatibility Criteria:

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

Mechanical Compatibility Criteria:

• Number of Circuits: 4
• Pitch Spacing: 0.375" (9.53mm)
• Mounting Configuration: Through Hole compatible
• Bottom Termination: PC Pin or equivalent board-mount interface

Environmental & Compliance Criteria:

• Operating Temperature: 105°C minimum
• Flammability Rating: UL94 V-0
• RoHS Compliance Status: RoHS3 or RoHS Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The substitute parts listed below meet these criteria and are classified as functionally equivalent for direct replacement applications.

Parameter Comparison

Engineering Selection Recommendations

1546721-4 (TE Connectivity AMP Connectors)

Primary selection for applications requiring exact barrier block configuration with thermoplastic insulation. RoHS Compliant status supports standard commercial and industrial applications. UL94 V-0 flammability rating meets safety-critical requirements. Through-hole PC pin mounting provides standard PCB integration.

1906129 (Phoenix Contact COMBICON MKDS)

This substitute provides enhanced current capacity (30A versus 20A) and broader wire gauge acceptance (10-30 AWG versus 12-22 AWG). Wire termination uses rising cage clamp technology rather than captive plate screws. ROHS3 Compliant and MSL 1 rating confirm environmental compatibility. Horizontal with board mating orientation and interlocking side entry design offer alternative mechanical integration. Operating temperature and flammability rating specifications are not provided; verification against application requirements is necessary for temperature-sensitive or safety-critical environments.

T38111-04-0 (Curtis Industries 38000 Series)

Direct functional equivalent with identical electrical ratings (20A, 300V) and wire gauge specification (12-22 AWG). Barrier block configuration and dual-wall barrier type match the original design. UL94 V-0 flammability rating and 105°C operating temperature align with primary part specifications. ROHS3 Compliant and MSL 1 rating confirm regulatory compliance. Supports both chassis/panel and through-hole mounting configurations, providing installation flexibility. Polypropylene insulation material differs from thermoplastic specification of the original part.

Frequently Asked Questions (FAQ)

Q: Can the Phoenix Contact 1906129 directly replace the TE Connectivity 1546721-4?

A: The 1906129 meets core electrical and mechanical requirements (4 circuits, 0.375" pitch, 300V, 20A minimum current capacity). However, termination method differs: the 1906129 uses rising cage clamp technology versus captive plate screws on the original. PCB layout and screw torque specifications (0.5-0.6 Nm for 1906129 versus unspecified for 1546721-4) must be evaluated for your application. Operating temperature and flammability specifications are not provided for the 1906129.

Q: What are the key differences between the Curtis Industries T38111-04-0 and the original TE Connectivity part?

A: Both parts share identical electrical ratings (20A, 300V), wire gauge range (12-22 AWG), pitch (0.375"), and barrier block configuration. Operating temperature (105°C) and flammability rating (UL94 V-0) are equivalent. The primary difference is insulation material: T38111-04-0 uses polypropylene versus thermoplastic in the original. Mounting flexibility is expanded with the Curtis part supporting chassis, panel, and through-hole configurations.

Q: Are all substitute parts RoHS compliant?

A: Yes. The original 1546721-4 is RoHS Compliant. Both substitutes (1906129 and T38111-04-0) are ROHS3 Compliant, which represents the current RoHS directive standard and is backward compatible with RoHS Compliant requirements.

Q: What is the significance of the 0.375" (9.53mm) pitch specification?

A: Pitch defines the center-to-center spacing between adjacent circuits. All three parts (1546721-4, 1906129, and T38111-04-0) share 0.375" pitch, ensuring mechanical compatibility with PCB layouts designed for the original component. Pitch mismatch would prevent physical installation.

Q: Does wire gauge range affect substitution suitability?

A: Wire gauge range defines acceptable conductor sizes for termination. The original 1546721-4 accepts 12-22 AWG. The Phoenix Contact 1906129 accepts 10-30 AWG (broader range), while the Curtis Industries T38111-04-0 matches the original at 12-22 AWG. Broader acceptance (1906129) provides flexibility for larger or smaller conductors but does not affect compatibility with standard 12-22 AWG applications.

Q: What mounting configurations are supported by each part?

A: The TE Connectivity 1546721-4 and Phoenix Contact 1906129 are specified for through-hole mounting. The Curtis Industries T38111-04-0 supports both chassis/panel and through-hole mounting, offering additional installation options for applications requiring alternative mounting methods.

Q: How does current rating affect part selection?

A: The original 1546721-4 is rated for 20A. The Phoenix Contact 1906129 provides 30A capacity, exceeding the original specification. The Curtis Industries T38111-04-0 matches the original at 20A. Higher current rating (1906129) does not prevent substitution in 20A applications but provides design margin for future upgrades. Selection should match or exceed application current requirements.

Q: Are there differences in termination methods between the substitute parts?

A: Yes. The original 1546721-4 uses screws with captive plate termination. The Phoenix Contact 1906129 uses screw-based rising cage clamp technology. The Curtis Industries T38111-04-0 matches the original with screws and captive plate. Termination method affects installation procedure and torque specifications; verify compatibility with assembly equipment and procedures.