TE Connectivity AMP Connectors 1546721-3 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1546721-3 is a 3-circuit barrier block terminal connector with 0.375" (9.53mm) pitch spacing, designed for through-hole PCB mounting. This component features screws with captive plate termination on the top and PC pin termination on the bottom, rated for 20A at 300V with wire gauge compatibility of 12-22 AWG. The part is classified as Active product status and is RoHS Compliant with UL94 V-0 flammability rating.

Substitute parts are necessary when the original manufacturer part becomes unavailable, when design requirements demand higher current ratings, or when alternative barrier block configurations better suit specific application needs while maintaining electrical and mechanical compatibility.

Substiute Parts

1546721-3

TE Connectivity AMP ConnectorsIn Stock: 10741546721-3 Datasheet

Current PartRFQ

1904150

Phoenix ContactIn Stock: 11921904150 Datasheet

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1907429

Phoenix ContactIn Stock: 10751907429 Datasheet

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A20220307WR

Eaton - Electronics DivisionIn Stock: 1064A20220307WR Datasheet

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CB20220307

Eaton - Electronics DivisionIn Stock: 1042CB20220307 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the TE Connectivity 1546721-3 is based on the following critical parameters that must align for functional equivalence:

Primary Matching Criteria:

• Number of circuits: 3
• Pitch spacing: 0.375" (9.53mm)
• Mounting type: Through Hole
• Terminal block type: Barrier Block
• Top termination: Screws with Captive Plate
• Bottom termination: PC Pin
• Wire gauge range: 12-22 AWG
• Flammability rating: UL94 V-0
• RoHS compliance status

Secondary Compatibility Parameters:

• Current rating: Equal to or greater than 20A
• Voltage rating: Equal to or greater than 300V
• Operating temperature range: Must accommodate 105°C maximum
• Barrier configuration: 2 Wall or greater

The substitute parts listed below satisfy all primary matching criteria and maintain or exceed secondary compatibility parameters. Parts CB20220307 and A20220307WR are direct barrier block equivalents from Eaton Electronics Division. Parts 1904150 and 1907429 are Phoenix Contact wire-to-board terminal blocks that share identical pitch, circuit count, and mounting characteristics but employ alternative wire termination technology (Rising Cage Clamp versus Screws with Captive Plate).

Parameter Comparison

Engineering Selection Recommendations

Direct Barrier Block Equivalents:

The Eaton Electronics Division parts CB20220307 (Magnum® CB2000 Series) and A20220307WR (A2000 Series) are direct functional equivalents to the TE Connectivity 1546721-3. Both parts maintain identical barrier block configuration, screw termination with captive plate design, PC pin bottom termination, and 0.375" pitch spacing. Both Eaton substitutes provide higher current ratings (30A versus 20A) and extended operating temperature ranges (-40°C to 105°C). Both parts carry ROHS3 Compliant status and UL94 V-0 flammability certification, ensuring compliance with current regulatory requirements. CB20220307 features a 3-wall (tri) barrier configuration compared to the original 2-wall design, providing enhanced circuit isolation.

Alternative Wire-to-Board Configuration:

Phoenix Contact parts 1904150 and 1907429 (COMBICON MKDS Series) provide functional substitution through alternative termination technology. These parts maintain the 3-circuit, 0.375" pitch, and through-hole mounting specifications. The Rising Cage Clamp wire termination replaces the screw-with-captive-plate design, offering different mechanical engagement characteristics. Both Phoenix Contact parts support higher current ratings (30A) and voltage ratings (600V). Part 1907429 carries ROHS3 Compliant certification, while 1904150 carries RoHS Compliant status. Neither Phoenix Contact part specifies UL94 flammability rating or operating temperature range in the provided data.

Selection Basis:

Selection among these substitutes depends on design requirements for current capacity, voltage margin, termination method preference, and regulatory compliance documentation. The Eaton barrier block substitutes (CB20220307 and A20220307WR) provide the closest functional equivalence with enhanced electrical ratings. The Phoenix Contact alternatives are suitable when wire-to-board configuration and higher voltage ratings align with application requirements.

Frequently Asked Questions (FAQ)

Q: Can CB20220307 or A20220307WR directly replace the TE Connectivity 1546721-3 without PCB layout modification?

A: Yes. Both Eaton parts maintain identical pitch spacing (0.375"), circuit count (3), and through-hole PC pin termination. PCB footprints are compatible. The screw termination interface is functionally equivalent, though CB20220307 features enhanced 3-wall barrier isolation versus the original 2-wall design.

Q: What is the primary difference between the Eaton CB20220307 and A20220307WR substitutes?

A: CB20220307 (Magnum® CB2000 Series) features 3-wall (tri) barrier construction, while A20220307WR (A2000 Series) features 2-wall (dual) barrier construction matching the original design. Both provide 30A current rating and identical voltage/temperature specifications. Selection depends on required circuit isolation level.

Q: Are Phoenix Contact 1904150 and 1907429 direct substitutes, or do they require design changes?

A: These Phoenix Contact parts are functional substitutes with design considerations. They maintain 3-circuit, 0.375" pitch, and through-hole mounting. However, the Rising Cage Clamp wire termination differs from screw-with-captive-plate design. PCB footprints are compatible, but wire termination procedures differ. These parts are suitable when alternative termination technology is acceptable and higher voltage rating (600V) is beneficial.

Q: What is the difference between 1904150 and 1907429 Phoenix Contact parts?

A: Both parts are identical in electrical and mechanical specifications. The primary difference is RoHS certification status: 1907429 carries ROHS3 Compliant certification, while 1904150 carries RoHS Compliant status. Selection depends on regulatory documentation requirements for the application.

Q: Can I use a substitute with higher current rating (30A) in place of the 20A original part?

A: Yes. All listed substitutes provide 30A current rating, which exceeds the original 20A specification. Higher current rating provides design margin and does not create compatibility issues. Wire gauge specifications (12-22 AWG for Eaton parts, 10-30 AWG for Phoenix Contact parts) remain compatible with original design wire sizes.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry either RoHS Compliant or ROHS3 Compliant certification. ROHS3 represents the current regulatory standard. The original TE Connectivity 1546721-3 carries RoHS Compliant status.

Q: Which substitute provides the best voltage margin for safety-critical applications?

A: Phoenix Contact parts 1904150 and 1907429 provide 600V rating compared to 300V in the original and Eaton substitutes. This 2:1 voltage margin is beneficial for applications requiring enhanced voltage safety factor. However, these parts do not specify UL94 flammability rating in provided data.

Q: What is the operating temperature range for each substitute?

A: The original TE Connectivity 1546721-3 specifies 105°C maximum. Eaton substitutes (CB20220307 and A20220307WR) specify -40°C to 105°C operating range. Phoenix Contact parts (1904150 and 1907429) do not specify operating temperature range in provided data.

Q: Are there packaging differences between the substitutes?

A: All substitute parts are supplied in Bulk packaging. The original TE Connectivity 1546721-3 packaging is not specified in provided data. Bulk packaging indicates standard industrial packaging without special protective measures.