TE Connectivity AMP Connectors 1546972-8 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 1546972-8 is an 8-circuit barrier block connector with 0.438" (11.12mm) pitch, rated for 20A at 600V, and designed for through-hole mounting applications. This component features dual-wall barrier construction with screw termination on top and PC pin termination on the bottom. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Terminal Block Type	Barrier Block
Number of Circuits	8
Pitch	0.438" (11.12mm)
Current Rating	20A
Voltage Rating	600V
Wire Gauge	12 AWG
Top Termination	Screws
Bottom Termination	PC Pin
Barrier Type	2 Wall (Dual)
Mounting Type	Through Hole
Operating Temperature Range	-60°C ~ 105°C
Material - Insulation	Thermoplastic
Flammability Rating	UL94 V-2

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 1546972-8 is determined by the following critical parameters: terminal block type (barrier block), number of circuits (8), pitch tolerance (0.437" to 0.438"), voltage rating (600V), mounting type (through hole), and barrier construction (dual wall). All substitute parts maintain these core specifications.

The Eaton A3000 series alternatives (A302208, A30220803, A30220807, A30740804) are classified as active products with enhanced current ratings (30A versus 20A), expanded wire gauge compatibility (12-22 AWG versus 12 AWG), and improved flammability ratings (UL94 V-0 versus V-2). Pitch specifications are nominally equivalent at 0.437" (11.10mm), representing a 0.01mm variance within acceptable tolerance for barrier block connectors.

Substitution logic is based on the following allowed parameters:

Barrier block terminal construction with dual-wall design
8-circuit configuration
Pitch within 0.437" to 0.438" range
600V voltage rating
Through-hole mounting
Thermoplastic insulation material
PC pin bottom termination (with exception noted for A30740804)
Screw-based top termination (standard or captive plate variants)

Parameter Comparison

Parameter	1546972-8 (TE Connectivity)	A302208 (Eaton)	A30220803 (Eaton)	A30220807 (Eaton)	A30740804 (Eaton)
Manufacturer	TE Connectivity AMP Connectors	Eaton - Electronics Division	Eaton - Electronics Division	Eaton - Electronics Division	Eaton - Electronics Division
Terminal Block Type	Barrier Block	Barrier Block	Barrier Block	Barrier Block	Barrier Block
Number of Circuits	8	8	8	8	8
Pitch	0.438" (11.12mm)	0.437" (11.10mm)	0.437" (11.10mm)	0.437" (11.10mm)	0.437" (11.10mm)
Number of Rows	1	1	1	1	1
Current Rating (Amps)	20A	30A	30A	30A	30A
Voltage Rating	600V	600V	600V	600V	600V
Wire Gauge	12 AWG	12-22 AWG	12-22 AWG	12-22 AWG	12-22 AWG
Top Termination	Screws	Screws	Screws	Screws with Captive Plate	Screws
Bottom Termination	PC Pin	PC Pin	PC Pin	PC Pin	PC Pin, Insulated
Barrier Type	2 Wall (Dual)	2 Wall (Dual)	2 Wall (Dual)	2 Wall (Dual)	2 Wall (Dual)
Color	Black	Black	Black	Black	Black
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature	-60°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Material - Insulation	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic	Thermoplastic
Flammability Rating	UL94 V-2	UL94 V-0	UL94 V-0	UL94 V-0	UL94 V-0
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	Not applicable	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

All four Eaton A3000 series alternatives (A302208, A30220803, A30220807, A30740804) are active products with current availability and ROHS3 compliance, providing advantages over the obsolete TE Connectivity 1546972-8.

A302208 and A30220803 are functionally equivalent barrier block connectors with standard screw termination. A302208 features zinc-plated steel screws, while A30220803 offers stainless steel screw options. Both support expanded wire gauge ranges (12-22 AWG) and deliver 30A current capacity. Selection between these two depends on corrosion resistance requirements in the application environment.

A30220807 provides identical electrical specifications to A302208 and A30220803 but incorporates a captive plate design on the screw termination. This feature enhances assembly security and reduces the risk of fastener loss during installation. This variant is suitable for applications requiring additional mechanical retention assurance.

A30740804 maintains core barrier block specifications but features insulated PC pins on the bottom termination and brass screws with nickel finish. The insulated pin design provides additional electrical isolation and is applicable in systems requiring enhanced safety margins or specific grounding isolation protocols.

All substitute parts operate within the -40°C to 105°C temperature range, which encompasses the majority of industrial applications. The original part's -60°C lower limit is not replicated; applications requiring sub-40°C operation require verification of actual environmental conditions.

All substitutes achieve UL94 V-0 flammability rating, exceeding the original V-2 specification and providing enhanced fire safety performance.

Frequently Asked Questions (FAQ)

Q: Can the Eaton A3000 series parts directly replace the TE Connectivity 1546972-8 in existing PCB designs?

A: Yes, all four Eaton alternatives maintain the same 8-circuit barrier block configuration, dual-wall barrier construction, 600V voltage rating, and through-hole mounting footprint. The pitch variance of 0.01mm (0.437" versus 0.438") is within standard tolerance for barrier block connectors and does not affect PCB layout compatibility.

Q: What is the significance of the current rating increase from 20A to 30A in the substitute parts?

A: The higher current rating in Eaton alternatives indicates enhanced thermal performance and conductor sizing. Applications operating at or near the original 20A specification benefit from the increased margin. Applications below 20A operate within the safe operating envelope of all substitute parts.

Q: How does the expanded wire gauge range (12-22 AWG) in substitute parts affect compatibility?

A: The original 1546972-8 accepts 12 AWG wire exclusively. Eaton alternatives accept 12-22 AWG, providing greater flexibility for applications using smaller gauge conductors. Existing installations using 12 AWG wire remain fully compatible with all substitutes.

Q: What distinguishes A30220807 from A302208 and A30220803?

A: A30220807 incorporates a captive plate design on the screw termination mechanism. This feature prevents fastener separation during assembly and maintenance operations. Electrical and thermal performance remain identical to A302208 and A30220803. Selection depends on assembly process requirements and mechanical retention preferences.

Q: When should A30740804 be selected over the other three alternatives?

A: A30740804 features insulated PC pins and brass screws with nickel finish. The insulated pin design provides galvanic isolation between the connector and PCB ground plane, applicable in systems requiring enhanced electrical isolation or specific grounding protocols. Brass construction offers superior corrosion resistance in harsh chemical environments compared to steel alternatives.

Q: Are there temperature range limitations when substituting the 1546972-8?

A: The original part operates from -60°C to 105°C. All Eaton substitutes operate from -40°C to 105°C. Applications requiring operation below -40°C require alternative component selection. Standard industrial and commercial applications typically operate within the -40°C to 105°C range covered by all substitutes.

Q: What is the impact of the UL94 V-0 rating in substitute parts compared to the original V-2 rating?

A: UL94 V-0 represents a higher flammability classification than V-2, indicating superior flame retardancy and self-extinguishing properties. This upgrade enhances fire safety performance in all applications without introducing compatibility concerns.

Q: Do all substitute parts carry ROHS3 compliance?

A: Yes, all four Eaton alternatives (A302208, A30220803, A30220807, A30740804) are ROHS3 compliant. The original TE Connectivity part lists RoHS status as not applicable. ROHS3 compliance ensures compliance with current environmental and hazardous substance regulations for new designs and manufacturing processes.

Q: What packaging considerations apply to these substitute parts?

A: All Eaton alternatives are supplied in bulk packaging. The original part packaging information is not specified. Bulk packaging is standard for barrier block connectors and does not affect component functionality or performance.

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