TE Connectivity AMP Connectors 331178 BNC Plug Right Angle 50 Ohm Equivalent & Substitute Parts

Part Overview

The TE Connectivity AMP Connectors 331178 is a BNC connector plug with male pin configuration, designed for 50 ohm coaxial applications. This connector features right angle, free hanging (in-line) mounting with push-on contact termination and crimp shield termination. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new design implementations.

Substiute Parts

331178

TE Connectivity AMP ConnectorsIn Stock: 1014331178 Datasheet

Current PartRFQ

031-316

Amphenol RFIn Stock: 765031-316 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the TE Connectivity 331178 with the Amphenol RF 031-316 is based on the following critical parameters that determine functional equivalence:

Electrical Compatibility:

• Both connectors maintain 50 ohm impedance specification
• Both support identical voltage rating of 500 V
• Both feature bayonet lock fastening type
• Both accommodate the same cable groups: RG-174 and RG-188

Mechanical Compatibility:

• Both employ BNC connector style with male pin plug configuration
• Both utilize free hanging (in-line), right angle mounting orientation
• Both feature single port configuration
• Both incorporate polytetrafluoroethylene (PTFE) dielectric material
• Both include gold-plated center contacts

Operational Differences: The primary distinction between these parts lies in contact termination methodology. The 331178 employs push-on contact termination, while the 031-316 utilizes crimp contact termination. This difference does not preclude substitution when the application accommodates crimp termination. The 031-316 additionally supports an expanded cable group range and operates across a wider temperature spectrum.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The Amphenol RF 031-316 serves as a direct functional substitute for the obsolete TE Connectivity 331178 in applications where crimp contact termination is acceptable. Both connectors satisfy identical electrical specifications including 50 ohm impedance, 500 V voltage rating, and bayonet lock fastening.

Compliance Considerations:

The 031-316 maintains superior regulatory compliance status as an active product with ROHS3 certification and REACH affected designation, compared to the 331178's RoHS compliant status. Both parts carry EAR99 export classification and identical HTSUS coding.

Performance Advantages:

The 031-316 provides extended operational temperature range (-65°C to 165°C versus -55°C to 85°C) and higher maximum frequency capability (4 GHz versus 2.5 GHz), offering enhanced performance margins for demanding applications. The specified insertion loss of 0.2 dB for the 031-316 provides measurable signal integrity data absent from the 331178 specification.

Cable Compatibility:

The 031-316 accommodates an expanded cable group range including RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174, providing greater flexibility compared to the 331178's RG-174 and RG-188 support.

Termination Methodology:

Applications currently utilizing push-on termination with the 331178 require process modification to implement crimp termination with the 031-316. This represents the primary design consideration for substitution implementation.

Frequently Asked Questions (FAQ)

Q: Can the Amphenol RF 031-316 directly replace the TE Connectivity 331178 in existing assemblies?

A: Direct mechanical and electrical replacement is feasible provided the application accommodates crimp contact termination. The bayonet lock fastening, 50 ohm impedance, and connector geometry remain identical. Assembly procedures must transition from push-on to crimp termination methodology.

Q: What cable types are compatible with the 031-316 substitute?

A: The 031-316 supports RG-174, RG-188, RG-188A, RG-316, LMR-100, and M17/119-RG174 cable specifications. The original 331178 supported RG-174 and RG-188. Expanded cable compatibility with the substitute provides additional design flexibility.

Q: Are there frequency limitations when substituting the 331178 with the 031-316?

A: The 031-316 operates at maximum frequency of 4 GHz, exceeding the 331178 specification of 2.5 GHz. Applications operating within the original 2.5 GHz specification experience no frequency-related constraints with the substitute.

Q: What is the temperature operating range difference between these connectors?

A: The 331178 operates from -55°C to 85°C, while the 031-316 operates from -65°C to 165°C. Applications requiring extended temperature performance benefit from the substitute's wider operational envelope.

Q: Do both connectors maintain identical impedance and voltage specifications?

A: Both connectors maintain 50 ohm impedance and 500 V voltage rating specifications. Electrical performance parameters remain equivalent for these critical characteristics.

Q: What regulatory compliance differences exist between the 331178 and 031-316?

A: The 331178 carries RoHS compliant certification, while the 031-316 carries ROHS3 compliant certification, representing updated regulatory alignment. The 031-316 includes REACH affected designation. Both maintain EAR99 export classification and identical HTSUS coding.

Q: How do the contact termination methods differ between these parts?

A: The 331178 employs push-on contact termination, while the 031-316 utilizes crimp contact termination. Crimp termination requires specialized tooling and assembly procedures distinct from push-on methodology.

Q: Is the 031-316 currently available for procurement?

A: The 031-316 maintains active product status with current inventory availability, contrasting with the 331178's obsolete classification. Active status ensures continued supply and technical support.