TC-300-SM SMA Male Plug Coaxial Connector - Equivalent & Substitute Parts

Part Overview

The TC-300-SM is an SMA male plug coaxial connector manufactured by Amphenol Times Microwave Systems, designed for RF applications requiring 50-ohm impedance. This connector features solder contact termination and crimp shield termination, suitable for free-hanging in-line cable applications up to 2.5 GHz. The product is currently obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing.

Substiute Parts

TC-300-SM

Amphenol Times Microwave SystemsIn Stock: 744TC-300-SM Datasheet

Current PartRFQ

EZ-300-SM-X

Amphenol Times Microwave SystemsIn Stock: 1110EZ-300-SM-X Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TC-300-SM is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

• Connector style: SMA
• Connector type: Plug, Male Pin
• Impedance: 50 Ohms
• Cable group: LMR-300
• Mounting type: Free Hanging (In-Line)
• Fastening type: Threaded
• Center contact material: Beryllium Copper
• Dielectric material: Polytetrafluoroethylene (PTFE)
• Shield termination: Crimp

The EZ-300-SM-X qualifies as a substitute part because it maintains all critical electrical and mechanical parameters. Differences in contact termination method (solder versus push-on), frequency rating, operating temperature range, and product status are secondary considerations that do not prevent functional substitution in LMR-300 cable applications.

Parameter Comparison

Engineering Selection Recommendations

The EZ-300-SM-X is the designated substitute for the obsolete TC-300-SM. Both connectors are manufactured by Amphenol Times Microwave Systems and maintain identical electrical and mechanical specifications for LMR-300 cable applications.

Compliance Status: The EZ-300-SM-X holds active product status with ROHS3 compliance, providing superior long-term availability and regulatory alignment compared to the obsolete TC-300-SM. Both parts carry EAR99 ECCN classification and identical HTSUS codes.

Performance Characteristics: The EZ-300-SM-X operates across an extended frequency range (8 GHz versus 2.5 GHz) and extended temperature range (-40°C to 125°C versus -40°C to 85°C), providing operational margin beyond the original TC-300-SM specifications. The substitute part includes documented mating cycle rating of 500 cycles.

Termination Consideration: The primary difference is contact termination method. The TC-300-SM uses solder termination while the EZ-300-SM-X uses push-on termination. Both methods achieve equivalent electrical performance on LMR-300 cables. The EZ-300-SM-X includes ferrule component as part of the connector assembly.

Frequently Asked Questions (FAQ)

Q: Can the EZ-300-SM-X directly replace the TC-300-SM in existing applications?

A: Yes. Both connectors maintain identical SMA male plug configuration, 50-ohm impedance, LMR-300 cable compatibility, and crimp shield termination. The EZ-300-SM-X is electrically and mechanically compatible for all applications within the TC-300-SM operating specifications.

Q: What is the difference between solder and push-on termination?

A: The TC-300-SM uses solder termination, requiring heat application to attach the center contact to the cable conductor. The EZ-300-SM-X uses push-on termination, where the center contact is mechanically seated onto the cable conductor. Both methods achieve equivalent electrical connection on LMR-300 cables.

Q: Why does the EZ-300-SM-X have a higher frequency rating?

A: The EZ-300-SM-X is rated to 8 GHz while the TC-300-SM is rated to 2.5 GHz. This difference reflects design and testing specifications. The EZ-300-SM-X provides operational margin for applications requiring higher frequency performance while remaining fully compatible with lower-frequency applications.

Q: Are there packaging differences between these connectors?

A: The TC-300-SM packaging is not specified in available documentation. The EZ-300-SM-X is supplied in bulk packaging and includes two components: one connector and one ferrule. Verify packaging requirements for your application.

Q: What is the temperature operating range difference?

A: The TC-300-SM operates from -40°C to 85°C. The EZ-300-SM-X operates from -40°C to 125°C. The extended upper temperature limit of the substitute part provides additional thermal margin for demanding applications.

Q: Are both parts RoHS compliant?

A: Yes. The TC-300-SM is RoHS Compliant. The EZ-300-SM-X is ROHS3 Compliant, representing current regulatory standards. Both parts meet environmental compliance requirements.