Amphenol RF 112491-10 BNC Connector Plug 75 Ohm Crimp

Part Overview

The Amphenol RF 112491-10 is a BNC connector plug with male pin configuration, designed for 75 ohm coaxial cable applications. This straight, free-hanging connector features crimp termination for both center contact and shield, operating across the RGB video cable group. The part is currently active in production with 807 units in stock. Alternative models are necessary when specific cable group compatibility, termination method, frequency requirements, or compliance certifications differ from the primary specification.

Key Parameters

Parameter	Value
Manufacturer Part Number	112491-10
Manufacturer	Amphenol RF
Connector Style	BNC
Connector Type	Plug, Male Pin
Contact Termination	Crimp
Shield Termination	Crimp
Impedance	75 Ohms
Mounting Type	Free Hanging (In-Line)
Fastening Type	Bayonet Lock
Frequency - Max	4 GHz
Operating Temperature	-65°C ~ 165°C
Voltage Rating	500 V
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the 112491-10 is determined by the following core parameters:

Primary Substitution Criteria:

Connector style (BNC) and type (Plug, Male Pin)
Impedance (75 Ohms)
Mounting configuration (Free Hanging, In-Line)
Fastening type (Bayonet Lock)
Contact and shield termination method (Crimp)

Secondary Compatibility Factors:

Cable group compatibility
Frequency maximum rating
Operating temperature range
Dielectric material composition
Body material and finish specifications

The 112491-10 operates at 4 GHz maximum frequency with PTFE dielectric and brass body with nickel finish. Substitute parts meeting the primary criteria but differing in cable group, frequency rating, dielectric material, or body composition remain functionally compatible for 75 ohm BNC crimp applications, though application-specific requirements may necessitate selection based on cable group or frequency performance.

Parameter Comparison

Part Number	Manufacturer	Contact Termination	Shield Termination	Impedance	Frequency Max	Operating Temp	Dielectric	Body Material	RoHS Status	Product Status
112491-10	Amphenol RF	Crimp	Crimp	75 Ohms	4 GHz	-65°C ~ 165°C	PTFE	Brass	ROHS3 Compliant	Active
1-5413589-0	TE Connectivity	Crimp	Crimp	75 Ohms	2 GHz	-55°C ~ 85°C	PE	Brass	RoHS Compliant	Obsolete
3-5221185-4	TE Connectivity	Crimp	Crimp	75 Ohms	2 GHz	-55°C ~ 85°C	PE	Zinc	ROHS3 Compliant	Active
413589-3	TE Connectivity	Crimp	Crimp	75 Ohms	2 GHz	-55°C ~ 85°C	PE	Zinc	Not applicable	Active
413589-8	TE Connectivity	Crimp	Crimp	75 Ohms	2 GHz	-55°C ~ 85°C	PE	Zinc	RoHS non-compliant	Active
5221185-3	TE Connectivity	Crimp	Crimp	75 Ohms	2 GHz	-55°C ~ 85°C	PE	Zinc Die Cast	ROHS3 Compliant	Active
5221185-8	TE Connectivity	Crimp	Crimp	75 Ohms	2 GHz	-55°C ~ 85°C	PE	Zinc Die Cast	RoHS Compliant	Obsolete
221185-8	TE Connectivity	Crimp	Crimp	75 Ohms	2 GHz	-55°C ~ 85°C	PE	Zinc	RoHS non-compliant	Obsolete

Engineering Selection Recommendations

Active Status Priority: Parts 3-5221185-4, 413589-3, 413589-8, and 5221185-3 maintain active production status, ensuring ongoing availability and supply chain continuity. The 112491-10 primary specification is also active.

Compliance Considerations: For applications requiring ROHS3 compliance, select from 112491-10, 3-5221185-4, or 5221185-3. The 112491-10 offers the highest frequency capability (4 GHz) with ROHS3 compliance and extended operating temperature range (-65°C to 165°C), making it suitable for demanding RF applications. Parts 413589-8 and 221185-8 are RoHS non-compliant and should be avoided in regulated environments.

Frequency and Temperature Trade-offs: The 112491-10 operates at 4 GHz maximum with -65°C to 165°C temperature range. All TE Connectivity substitutes operate at 2 GHz maximum with -55°C to 85°C range. Selection depends on application frequency requirements and thermal environment specifications.

Cable Group Compatibility: The 112491-10 is specified for RGB video cable group. TE Connectivity alternatives support specific cable groups: 1-5413589-0 (AT&T 735A), 3-5221185-4 (C&M 17189), 413589-3 (Belden 8218), 413589-8 and 5221185-8 (RG-179, 179A, 179B, 187, 187A), and 5221185-3 (Belden 8218). Cable group selection must align with intended coaxial cable specifications.

Frequently Asked Questions (FAQ)

Q: Can TE Connectivity parts directly replace the Amphenol RF 112491-10?

A: TE Connectivity BNC crimp plugs are mechanically and electrically compatible as 75 ohm BNC connectors with identical bayonet locking and crimp termination. However, frequency ratings differ: the 112491-10 supports 4 GHz while TE alternatives support 2 GHz maximum. Selection depends on application frequency requirements.

Q: What is the significance of dielectric material differences (PTFE vs. PE)?

A: The 112491-10 uses PTFE (polytetrafluoroethylene) dielectric, while most TE Connectivity substitutes use PE (polyethylene). PTFE offers superior high-frequency performance and lower dielectric loss, supporting the 112491-10's 4 GHz capability. PE dielectric is suitable for lower frequency applications up to 2 GHz.

Q: Are obsolete parts acceptable for new designs?

A: Parts marked obsolete (1-5413589-0, 5221185-8, 221185-8) are no longer in active production. While existing inventory may be available, obsolete status indicates discontinued manufacturing. New designs should prioritize active status parts to ensure long-term supply availability.

Q: How do body material differences affect connector performance?

A: The 112491-10 uses brass body with nickel finish. TE Connectivity alternatives use zinc or zinc die cast bodies. Brass provides superior corrosion resistance and conductivity. Zinc bodies are cost-effective but may require additional plating for equivalent environmental performance. Material selection impacts long-term reliability in corrosive environments.

Q: What packaging differences exist between these parts?

A: The 112491-10 is supplied in bulk packaging with 4-piece includes (connector, contact, ferrule, sleeve). Most TE Connectivity alternatives are supplied with 3-piece includes (connector, contact, ferrule) without sleeve. Verify packaging contents match assembly requirements.

Q: Which substitute offers the best compliance profile?

A: Parts 3-5221185-4 and 5221185-3 offer ROHS3 compliance with active production status. The 112491-10 provides the most comprehensive compliance (ROHS3, REACH Affected) combined with superior frequency performance (4 GHz) and extended temperature range.

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