TC-240-BMC Equivalent & Substitute Parts

Part Overview

The TC-240-BMC is a BNC male plug connector manufactured by Amphenol Times Microwave Systems, designed for 50-ohm coaxial cable applications with a maximum frequency rating of 2.5 GHz. This connector features a clamp shield termination and solder contact termination, suitable for free-hanging in-line installations. The product is currently classified as obsolete, making identification of compatible substitute parts essential for ongoing system maintenance and new design implementations where legacy compatibility is required.

Key Parameters

Parameter	Value
Manufacturer Part Number	TC-240-BMC
Manufacturer	Amphenol Times Microwave Systems
Category	Coaxial Connectors (RF)
Connector Style	BNC
Connector Type	Plug, Male Pin
Impedance	50 Ohms
Cable Group	LMR-240
Frequency - Max	2.5 GHz
Operating Temperature Range	-40°C to 85°C
Voltage Rating	500 V
RoHS Status	RoHS Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the TC-240-BMC is determined by strict equivalence across the following critical parameters:

Connector Style & Type: Both parts must be BNC male plug connectors
Impedance: 50-ohm characteristic impedance is mandatory
Cable Compatibility: LMR-240 cable group compatibility
Frequency Rating: Maximum frequency of 2.5 GHz or higher
Operating Temperature: -40°C to 85°C range
Contact Termination: Solder termination for both center and shield connections
Mounting Configuration: Free-hanging in-line installation

The TC-240-BM-X qualifies as a substitute based on these parameters. While secondary characteristics such as body material, shield termination method (clamp versus crimp), and dielectric material differ, the primary electrical and mechanical specifications remain compatible for LMR-240 cable applications within the specified frequency and temperature ranges.

Parameter Comparison

Parameter	TC-240-BMC (Main Part)	TC-240-BM-X (Substitute)
Manufacturer	Amphenol Times Microwave Systems	Amphenol Times Microwave Systems
Connector Style	BNC	BNC
Connector Type	Plug, Male Pin	Plug, Male Pin
Contact Termination	Solder	Solder
Impedance	50 Ohms	50 Ohms
Cable Group	LMR-240	LMR-240
Fastening Type	Bayonet Lock	Bayonet Lock
Frequency - Max	2.5 GHz	2.5 GHz
Mounting Type	Free Hanging (In-Line)	Free Hanging (In-Line)
Operating Temperature	-40°C to 85°C	-40°C to 85°C
Voltage Rating	500 V	Not specified
Center Contact Plating	Gold	Gold
RoHS Status	RoHS Compliant	ROHS3 Compliant
Product Status	Obsolete	Active
Shield Termination	Clamp	Crimp
Body Material	Beryllium Copper	Aluminum
Dielectric Material	Polytetrafluoroethylene (PTFE)	Polyethylene (PE)

Engineering Selection Recommendations

The TC-240-BM-X is the manufacturer-recommended substitute for the obsolete TC-240-BMC. Selection of the substitute part is justified by the following factors:

Product Status: The TC-240-BMC is obsolete, while the TC-240-BM-X maintains active production status, ensuring long-term availability and supply chain continuity.
Regulatory Compliance: Both parts meet RoHS requirements. The TC-240-BM-X achieves ROHS3 compliance, representing current regulatory standards.
Electrical Equivalence: Both connectors maintain identical impedance (50 ohms), frequency rating (2.5 GHz), and operating temperature range (-40°C to 85°C), ensuring functional compatibility in LMR-240 cable applications.
Mechanical Compatibility: Both parts feature identical BNC bayonet locking mechanisms, solder contact termination, and free-hanging in-line mounting configuration.

The primary differences—shield termination method (clamp versus crimp) and body material composition—do not affect electrical performance or mechanical mating within the specified application parameters.

Frequently Asked Questions (FAQ)

Q: Can the TC-240-BM-X directly replace the TC-240-BMC in existing installations?

A: Yes. Both connectors share identical electrical specifications (50-ohm impedance, 2.5 GHz maximum frequency), mechanical interfaces (BNC bayonet lock), and operating temperature ranges (-40°C to 85°C). The TC-240-BM-X is the manufacturer-recommended substitute for the obsolete TC-240-BMC.

Q: What is the difference between clamp and crimp shield termination?

A: The TC-240-BMC uses clamp shield termination, while the TC-240-BM-X uses crimp shield termination. Both methods provide equivalent electrical connection to the cable shield for LMR-240 applications. The termination method does not affect impedance or frequency performance.

Q: Are there packaging differences between these parts?

A: The TC-240-BMC is supplied in standard packaging, while the TC-240-BM-X is supplied in bulk packaging. This difference affects procurement and handling but does not impact electrical or mechanical performance.

Q: Does the change in body material from beryllium copper to aluminum affect performance?

A: No. Both materials provide adequate shielding and mechanical strength for 50-ohm BNC connector applications. The material change does not affect electrical characteristics or frequency response within the 2.5 GHz maximum rating.

Q: Is the TC-240-BM-X compatible with LMR-240 cable?

A: Yes. The TC-240-BM-X is specified for LMR-240 cable group compatibility, identical to the TC-240-BMC. Both connectors are designed for use with LMR-240 coaxial cable.

Q: What is the significance of ROHS3 compliance on the substitute part?

A: ROHS3 compliance indicates the TC-240-BM-X meets current European Union Restriction of Hazardous Substances regulations. This represents updated regulatory certification compared to the obsolete TC-240-BMC and ensures compliance with current procurement standards.

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