TE Connectivity 221447-1 SMA Connector Plug Equivalent & Substitute Parts

Part Overview

The TE Connectivity 221447-1 is a coaxial SMA connector plug designed for RF applications requiring 50-ohm impedance. This male pin connector operates at frequencies up to 18 GHz and is configured for free-hanging (in-line) mounting with crimp shield termination on RG-405 semi-rigid cable. The part is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives to maintain supply chain continuity for existing designs and applications.

Substiute Parts

221447-1

TE Connectivity Aerospace, Defense and MarineIn Stock: 1015221447-1 Datasheet

Current PartRFQ

228639-1

TE Connectivity Aerospace, Defense and MarineIn Stock: 723228639-1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 221447-1 is determined by strict equivalence across the following critical parameters:

Electrical Specifications: Impedance (50 Ohms), frequency rating (18 GHz maximum), voltage rating (335 V), and insertion loss (0.3 dB) must remain constant.

Mechanical Configuration: Connector style (SMA), connector type (Plug, Male Pin), mounting type (Free Hanging/In-Line), fastening type (Threaded), and cable group compatibility (RG-405 semi-rigid) must be identical.

Material and Contact Specifications: Center contact material (Beryllium Copper), center contact plating (Gold), body material (Stainless Steel), dielectric material (PTFE), and shield termination method (Crimp) must match.

Performance Characteristics: Mating cycles (500) and number of ports (1) must be equivalent.

Substitute parts meeting all these criteria are functionally interchangeable within the original design without modification to PCB layouts, cable assemblies, or mating interfaces.

Parameter Comparison

Engineering Selection Recommendations

The TE Connectivity 228639-1 is a direct functional equivalent to the 221447-1 across all critical electrical, mechanical, and material specifications. Both parts are discontinued at DiGi Electronics, indicating limited future availability.

Compliance Advantage: The 228639-1 carries MIL-PRF-39012 military qualification and ROHS3 compliance, providing enhanced regulatory standing compared to the base RoHS compliance of the 221447-1. This qualification does not alter electrical or mechanical performance but extends applicability to military and defense procurement specifications.

Operating Temperature Definition: The 228639-1 specifies an operating temperature range of -65°C to 105°C, whereas the 221447-1 does not provide this specification. For applications requiring defined thermal performance parameters, the 228639-1 offers explicit documentation.

Inventory Consideration: Both parts maintain current stock availability (952 units for 221447-1 and 670 units for 228639-1), supporting immediate procurement without lead time constraints.

Selection Basis: Component selection between these equivalent parts should be determined by compliance requirements, thermal specification needs, and inventory availability rather than electrical or mechanical performance differences.

Frequently Asked Questions (FAQ)

Q: Are the 221447-1 and 228639-1 electrically interchangeable?

A: Yes. Both connectors operate at identical impedance (50 Ohms), frequency rating (18 GHz), voltage rating (335 V), and insertion loss (0.3 dB). Electrical performance is equivalent across all specified parameters.

Q: Can the 228639-1 be used as a direct replacement in existing cable assemblies designed for the 221447-1?

A: Yes. Both connectors share identical mechanical configuration, mounting type (free-hanging in-line), fastening type (threaded), and cable group compatibility (RG-405 semi-rigid). No modifications to existing assemblies are required.

Q: What is the significance of the MIL-PRF-39012 designation on the 228639-1?

A: MIL-PRF-39012 is a military performance specification for coaxial connectors. This qualification indicates the 228639-1 meets military procurement standards and is suitable for defense applications. The 221447-1 does not carry this designation.

Q: Does the operating temperature specification difference affect component selection?

A: The 228639-1 explicitly specifies -65°C to 105°C operating temperature, while the 221447-1 does not provide this specification. For applications requiring documented thermal performance, the 228639-1 provides explicit parameters. Both parts are functionally equivalent within this temperature range.

Q: Are both parts RoHS compliant?

A: Yes. The 221447-1 is RoHS Compliant, and the 228639-1 is ROHS3 Compliant. Both meet environmental compliance requirements. ROHS3 represents a more recent compliance standard.

Q: What is included with the 228639-1 that differs from the 221447-1?

A: The 228639-1 includes 2 pieces (1 Connector and 1 Contact), whereas the 221447-1 does not specify included components. This packaging difference does not affect electrical or mechanical equivalence.

Q: Are there any restrictions on using these connectors in specific applications?

A: Both connectors are classified under ECCN EAR99 and HTSUS 8536.69.4010, indicating standard commercial export classification. Application restrictions depend on end-use requirements and regulatory jurisdiction rather than connector specifications.

Q: What is the expected service life of these connectors?

A: Both connectors are rated for 500 mating cycles, defining the mechanical durability specification. Actual service life depends on application conditions, frequency of mating/unmating, and environmental factors.

Q: Can these SMA connectors be used interchangeably with other 50-ohm RF connectors?

A: No. SMA connectors are a specific connector style with defined mechanical and electrical interfaces. They are compatible only with mating SMA receptacles and cannot be substituted with other connector types (such as N-type, TNC, or BNC) without mechanical and electrical redesign.