TE Connectivity AMP Connectors 521311-2 Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 521311-2 is a 3 Position Housing Connector Female Receptacle in Natural color, designed for 0.110" (2.79mm) Quick Connect/Disconnect applications. This component operates as a receptacle housing for Faston series connectors and is classified as Obsolete product status. Due to its obsolete classification, identification of active equivalent parts is necessary to maintain design continuity and ensure ongoing component availability for production and field service applications.

Substiute Parts

521311-2

TE Connectivity AMP ConnectorsIn Stock: 901521311-2 Datasheet

Current PartRFQ

880137-2

TE Connectivity AMP ConnectorsIn Stock: 1250880137-2 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 521311-2 is based on strict electrical and mechanical compatibility criteria. The substitute part 880137-2 maintains functional equivalence through the following key parameters:

Critical Matching Parameters:

• Terminal Size: 0.110" (2.79mm) — identical across both parts
• Number of Positions: 3 — identical configuration
• Gender: Female, Receptacle — identical functional role
• Terminal Type: Quick Connect, Disconnect — identical connection method
• Mounting Type: Free Hanging (In-Line) — identical installation approach
• Stacking Direction: Top to Bottom — identical orientation
• For Use With/Related Products: 0.110" (2.79mm) Quick Connects — identical application compatibility

Allowable Variations:

• Color: Natural (521311-2) to Black (880137-2) — cosmetic difference with no functional impact
• Series: Faston (521311-2) to Fastin-Faston (880137-2) — backward compatible series evolution
• Material: Polyamide PA66/Nylon 6/6 (521311-2) to Nylon (880137-2) — equivalent material composition
• Product Status: Obsolete (521311-2) to Active (880137-2) — availability improvement
• RoHS Status: ROHS3 Compliant (521311-2) to RoHS Compliant (880137-2) — equivalent environmental compliance

Parameter Comparison

Engineering Selection Recommendations

The 880137-2 serves as a direct functional substitute for the obsolete 521311-2 based on the following engineering criteria:

Product Status Consideration: The 521311-2 is classified as Obsolete, which restricts long-term availability and supply chain reliability. The 880137-2 maintains Active product status, ensuring continued manufacturing support and component availability.

Compliance Equivalence: Both parts maintain equivalent environmental compliance certifications. The 521311-2 carries ROHS3 Compliant status, while the 880137-2 carries RoHS Compliant status. Both certifications satisfy regulatory requirements for restricted substance management.

Electrical and Mechanical Compatibility: All critical functional parameters remain identical between the two parts. Terminal size, position count, gender, connection type, and mounting configuration are preserved, ensuring direct mechanical and electrical interchangeability within 0.110" (2.79mm) Quick Connect/Disconnect applications.

Material and Environmental Performance: Both parts utilize equivalent nylon-based materials with identical Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture-related handling restrictions and equivalent environmental performance characteristics.

Series Compatibility: The transition from Faston to Fastin-Faston series represents a backward-compatible evolution within TE Connectivity's connector product line, maintaining full functional compatibility with existing 0.110" (2.79mm) quick connect systems.

Frequently Asked Questions (FAQ)

Q: Can the 880137-2 be used as a direct replacement for the 521311-2 in existing assemblies?

A: Yes. The 880137-2 maintains identical electrical and mechanical specifications across all critical parameters: terminal size (0.110"/2.79mm), position count (3), gender (Female Receptacle), connection type (Quick Connect/Disconnect), and mounting configuration (Free Hanging In-Line). The parts are functionally interchangeable.

Q: What is the difference between the Natural color of the 521311-2 and the Black color of the 880137-2?

A: Color is a cosmetic specification with no impact on electrical or mechanical function. Both parts perform identically in Quick Connect/Disconnect applications. Color selection depends on assembly aesthetics or identification requirements.

Q: Are there material differences between the 521311-2 and 880137-2?

A: Both parts utilize nylon-based materials. The 521311-2 specifies Polyamide (PA66) Nylon 6/6, while the 880137-2 specifies Nylon. These materials are equivalent in performance for this connector housing application.

Q: What does the Fastin-Faston series designation mean for the 880137-2?

A: Fastin-Faston indicates an evolution of the Faston series connector line. The 880137-2 maintains full backward compatibility with 0.110" (2.79mm) Quick Connect systems, ensuring compatibility with existing connector designs and applications.

Q: Do both parts have the same moisture sensitivity requirements?

A: Yes. Both the 521311-2 and 880137-2 carry Moisture Sensitivity Level (MSL) rating of 1 (Unlimited), indicating no moisture-related handling or storage restrictions. Both parts can be stored and handled under standard environmental conditions.

Q: Why is the 521311-2 listed as Obsolete?

A: Obsolete status indicates that the manufacturer has discontinued production of this part number. The 880137-2 is the active equivalent, ensuring continued availability and manufacturing support for this connector housing function.

Q: Are the RoHS compliance statuses equivalent between the two parts?

A: Yes. The 521311-2 carries ROHS3 Compliant status, and the 880137-2 carries RoHS Compliant status. Both certifications satisfy regulatory requirements for restricted substance management and are equivalent for compliance purposes.

Q: What packaging is available for the 880137-2?

A: The 880137-2 is supplied in Bulk packaging, with 1167 pieces available in current inventory as new original stock.

Q: Are contacts included with either part?

A: No. Both the 521311-2 and 880137-2 are housing components only. Contacts are not included and must be sourced separately for 0.110" (2.79mm) Quick Connect applications.

Q: Can the 880137-2 be used in new designs as well as replacement applications?

A: Yes. The 880137-2 is classified as Active product status and is suitable for both new design implementations and field replacement of obsolete 521311-2 components. All electrical and mechanical specifications support direct application in 0.110" (2.79mm) Quick Connect/Disconnect systems.