TE Connectivity 521437-1 Quick Connect Female Crimp Connector Equivalent & Substitute Parts

Part Overview

The TE Connectivity 521437-1 is a 0.110" (2.79mm) Quick Connect Female Crimp Connector rated for 18-22 AWG wire gauges with full insulation. This connector is part of the Ultrapod series and is designed for free-hanging, in-line applications. The 521437-1 is classified as obsolete, making identification of active equivalent parts essential for procurement and design continuity. Substitute parts must maintain identical electrical and mechanical specifications to ensure direct compatibility in existing applications.

Substiute Parts

521437-1

TE Connectivity AMP ConnectorsIn Stock: 1113521437-1 Datasheet

Current PartRFQ

521437-2

TE Connectivity AMP ConnectorsIn Stock: 15206521437-2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 521437-1 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Wire gauge range: 18-22 AWG
• Contact material: Brass
• Insulation type: Fully Insulated
• Tab width: 0.110" (2.79mm)
• Tab thickness: 0.032" (0.81mm)

Mechanical Parameters:

• Overall length: 1.180" (29.98mm)
• Insulation diameter range: 0.080" ~ 0.120" (2.03mm ~ 3.05mm)
• Mounting type: Free Hanging (In-Line)
• Gender: Female
• Termination: Crimp

Compliance Parameters:

• RoHS compliance status
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• ECCN and HTSUS classifications

The 521437-2 meets all required electrical and mechanical parameters and is classified as an active product with current manufacturing status, making it a direct substitute for the obsolete 521437-1.

Parameter Comparison

Engineering Selection Recommendations

The 521437-2 is the direct equivalent substitute for the obsolete 521437-1. Both parts share identical electrical and mechanical specifications across all critical parameters including tab dimensions, wire gauge rating, insulation type, and overall length.

Selection Basis:

The 521437-2 is classified as an active product with current manufacturing status, ensuring ongoing availability and supply chain continuity. Both parts maintain RoHS compliance, with the 521437-2 meeting the more recent ROHS3 standard. The MSL rating of 1 (Unlimited) is identical for both parts, indicating equivalent moisture sensitivity characteristics.

The 521437-2 is supplied in Cut Tape (CT) packaging, which is standard for high-volume procurement. The addition of a specified tin contact finish on the 521437-2 provides enhanced corrosion resistance compared to the unspecified finish of the obsolete 521437-1, while maintaining full electrical and mechanical compatibility.

All compliance classifications, including ECCN (EAR99) and HTSUS (8536.90.4000), remain unchanged between the two parts.

Frequently Asked Questions (FAQ)

Q: Can the 521437-2 be used as a direct replacement for the 521437-1 in existing applications?

A: Yes. The 521437-2 is electrically and mechanically identical to the 521437-1 across all critical parameters. Both parts have identical tab dimensions (0.110" width, 0.032" thickness), wire gauge rating (18-22 AWG), insulation type (fully insulated), and overall length (1.180"). Direct substitution is supported without design modification.

Q: What is the difference between the 521437-1 and 521437-2?

A: The primary difference is product status. The 521437-1 is obsolete, while the 521437-2 is active and in current production. The 521437-2 includes a specified tin contact finish, whereas the 521437-1 finish is not specified. Both parts are RoHS compliant, with the 521437-2 meeting the ROHS3 standard. All electrical and mechanical specifications are identical.

Q: Are there any compatibility concerns when switching from 521437-1 to 521437-2?

A: No compatibility concerns exist. Both parts are from the same Ultrapod series, share identical tab dimensions and wire gauge ratings, and are designed for the same free-hanging, in-line mounting applications. The insulation diameter range (0.080" ~ 0.120") is identical for both parts.

Q: What packaging is available for the 521437-2?

A: The 521437-2 is supplied in Cut Tape (CT) packaging, which is standard for terminal components and suitable for automated assembly processes.

Q: Are both parts RoHS compliant?

A: Yes. The 521437-1 is RoHS Compliant, and the 521437-2 is ROHS3 Compliant. Both meet RoHS requirements, with the 521437-2 meeting the more recent ROHS3 standard.

Q: What is the MSL rating for these connectors?

A: Both the 521437-1 and 521437-2 have an MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions for storage or handling.

Q: Can the 521437-2 handle the same wire gauge range as the 521437-1?

A: Yes. Both parts are rated for 18-22 AWG wire gauges and have identical insulation diameter specifications (0.080" ~ 0.120").