TE Connectivity AMP Connectors 521787-1 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 521787-1 is a 3 Position Housing Connector Female Receptacle designed for 0.187" (4.75mm) Quick Connect and Disconnect applications. This connector operates as a free-hanging, in-line mounted terminal housing constructed from Polyamide (PA66) Nylon 6/6 material in natural color.

The 521787-1 is classified as an Obsolete product. Identification of equivalent and substitute parts is necessary to maintain system compatibility and ensure continued availability for applications requiring this connector specification.

Substiute Parts

521787-1

TE Connectivity AMP ConnectorsIn Stock: 1091521787-1 Datasheet

Current PartRFQ

1-521787-1

TE Connectivity AMP ConnectorsIn Stock: 39621-521787-1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 521787-1 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Terminal Type: Quick Connect, Disconnect
• Gender: Female, Receptacle
• Terminal Size: 0.187" (4.75mm)
• Number of Positions: 3
• Stacking Direction: Side to Side
• Mounting Type: Free Hanging (In-Line)
• Material: Polyamide (PA66), Nylon 6/6
• Color: Natural
• Series: Faston

The substitute part 1-521787-1 meets all mandatory matching parameters and is therefore classified as a direct equivalent. The primary distinction between the main part and substitute is product status and packaging configuration.

Parameter Comparison

Engineering Selection Recommendations

The substitute part 1-521787-1 is a direct functional equivalent to the obsolete 521787-1. Both parts share identical electrical and mechanical specifications, including terminal configuration, contact size, position count, and material composition.

The primary advantage of selecting 1-521787-1 is its Active product status, ensuring long-term availability and continued manufacturing support. The substitute part maintains equivalent RoHS compliance and ECCN classification, supporting regulatory requirements for both legacy and new applications.

Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture handling requirements during storage or installation.

The substitute part is supplied in Bulk packaging, which may differ from the original packaging configuration. Packaging selection should be evaluated based on procurement volume and inventory management requirements.

Frequently Asked Questions (FAQ)

Q: Can 1-521787-1 be used as a direct replacement for 521787-1?

A: Yes. The 1-521787-1 is a direct functional equivalent. Both parts are manufactured by TE Connectivity AMP Connectors and share identical specifications for terminal type, gender, terminal size, position count, stacking direction, mounting type, material, and color.

Q: What is the primary difference between these two parts?

A: The 521787-1 is classified as Obsolete, while 1-521787-1 is Active. The substitute part is supplied in Bulk packaging. All electrical and mechanical parameters are identical.

Q: Are there any compliance differences between the two parts?

A: Both parts are RoHS compliant and carry the same ECCN (EAR99) and HTSUS (8536.69.8000) classifications. The 521787-1 is ROHS3 Compliant, while 1-521787-1 is RoHS Compliant. Both meet regulatory requirements for their respective applications.

Q: Do these connectors include contacts?

A: No. Both the 521787-1 and 1-521787-1 are housing-only components. Contacts must be sourced separately and are compatible with 0.187" (4.75mm) Quick Connect and Disconnect flag terminals.

Q: What is the Moisture Sensitivity Level for these parts?

A: Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture sensitivity restrictions. Standard handling and storage procedures are sufficient.

Q: Are there inventory considerations when selecting between these parts?

A: The 521787-1 has 1065 pieces in stock as a legacy item. The 1-521787-1 has 3875 pieces in stock and is an Active product with ongoing manufacturing support. For new designs or long-term applications, 1-521787-1 is the recommended selection.