TE Connectivity AMP Connectors 322257 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 322257 is a ring terminal connector designed for high-amperage applications. This component features a circular terminal geometry with a 3/8 inch stud, rated for 300-350MCM (kcmil) wire gauges, and utilizes a crimp termination method with a brazed seam construction. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility for new designs and replacement applications.

Substiute Parts

322257

TE Connectivity AMP ConnectorsIn Stock: 826322257 Datasheet

Current PartRFQ

325803

TE Connectivity AMP ConnectorsIn Stock: 982325803 Datasheet

MFR RecommendedRFQ

325803-1

TE Connectivity AMP ConnectorsIn Stock: 1411325803-1 Datasheet

MFR RecommendedRFQ

325903

TE Connectivity AMP ConnectorsIn Stock: 1050325903 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 322257 is determined by the following critical parameters: stud size (3/8 inch), wire gauge compatibility (300-350MCM range), termination method (crimp), contact material (copper), contact finish (tin), insulation type (non-insulated), and mounting configuration (free hanging in-line). The substitute parts identified maintain these core electrical and mechanical characteristics while offering active product status and current manufacturing availability.

The three substitute parts are grouped as follows:

Primary Substitutes (Wire Gauge Aligned):

• 325803 and 325803-1: Rectangular standard terminals rated for 300MCM wire gauge with 3/8 stud, crimp/barrel termination, and tin-plated copper construction
• 325903: Rectangular tongue terminal rated for 350MCM wire gauge with 3/8 stud equivalent mounting, crimp/barrel termination, and tin-plated copper construction

All substitutes maintain the 3/8 stud size, free hanging in-line mounting, non-insulated configuration, and copper/tin contact material specifications of the original part.

Parameter Comparison

Engineering Selection Recommendations

For 300MCM Wire Gauge Applications: Parts 325803 and 325803-1 are direct functional equivalents for applications requiring 300MCM wire gauge termination. Both parts are active products with current manufacturing support. Part 325803-1 offers higher inventory availability (1368 pcs) compared to 325803 (932 pcs). Both maintain RoHS compliance and identical electrical/mechanical specifications for the 300MCM wire gauge range.

For 350MCM Wire Gauge Applications: Part 325903 serves as the equivalent for 350MCM wire gauge applications. This part is active and maintains all critical parameters including the 3/8 stud size, crimp/barrel termination, copper/tin construction, and free hanging in-line mounting. The 325903 accommodates the upper end of the original part's wire gauge range.

Compliance Considerations: All substitute parts maintain RoHS compliance and EAR99 ECCN classification consistent with the original 322257. The MSL rating of 1 (Unlimited) is preserved across all alternatives, indicating no moisture sensitivity constraints for storage and handling.

Frequently Asked Questions (FAQ)

Q: Can 325803 or 325803-1 be used as direct replacements for 322257 in existing assemblies?

A: Yes, for applications requiring 300MCM wire gauge termination. Both parts maintain the 3/8 stud size, crimp termination method, copper/tin contact material, and free hanging in-line mounting configuration. The primary difference is terminal geometry (rectangular versus circular), which does not affect electrical performance when the stud interface is the functional requirement.

Q: What is the difference between 325803 and 325803-1?

A: Parts 325803 and 325803-1 are functionally identical in electrical and mechanical specifications. The primary distinction is inventory availability, with 325803-1 offering 1368 pieces in stock versus 932 pieces for 325803. Both are active products from the Ampower series with identical dimensional and performance characteristics.

Q: When should 325903 be selected instead of 325803 or 325803-1?

A: Part 325903 is specified for applications requiring 350MCM wire gauge termination. If the original 322257 was used in a 350MCM application, 325903 provides the appropriate wire gauge rating. For 300MCM applications, 325803 or 325803-1 are the correct selections.

Q: Are there any dimensional differences that affect mechanical fit?

A: All substitute parts maintain the 3/8 stud size and free hanging in-line mounting configuration. Minor dimensional variations exist in overall length and width due to terminal geometry differences (rectangular versus circular), but these do not affect stud interface compatibility or electrical performance.

Q: What is the significance of the "Crimp, Barrel" termination designation on substitute parts?

A: The substitute parts utilize both crimp and barrel termination methods, providing enhanced connection reliability compared to crimp-only termination. This represents an improvement over the original 322257 specification while maintaining full compatibility with standard crimping equipment and procedures.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three substitute parts (325803, 325803-1, and 325903) maintain RoHS compliance. Part 325803 carries ROHS3 certification, while 325803-1 and 325903 carry standard RoHS certification. All meet current environmental and regulatory requirements.

Q: What inventory considerations should guide part selection?

A: Part 325803-1 offers the highest current inventory (1368 pcs), followed by 325903 (971 pcs) and 325803 (932 pcs). For applications requiring immediate availability, 325803-1 is the preferred selection when 300MCM wire gauge is specified.