PL121 BNC Connector Plug Equivalent & Substitute Parts

Part Overview

The PL121 is an active BNC connector plug manufactured by Cinch Connectivity Solutions Trompeter, designed for 50-ohm coaxial RF applications. This male pin connector features a panel mount configuration with solder cup termination and operates across a frequency range up to 4 GHz. The component is ROHS3 compliant and REACH affected, making it suitable for modern electronic assemblies requiring RF connectivity in controlled impedance environments. Substitute parts may be required due to inventory constraints, supply chain considerations, or specific application requirements within the allowed electrical and mechanical parameter ranges.

Substiute Parts

PL121

Cinch Connectivity Solutions TrompeterIn Stock: 896PL121 Datasheet

Current PartRFQ

BNC-BPR-3(40)

Hirose Electric Co LtdIn Stock: 964BNC-BPR-3(40) Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PL121 is determined by strict adherence to the following core electrical and mechanical parameters:

Critical Matching Parameters:

• Connector Style: BNC (exact match required)
• Connector Type: Plug, Male Pin (exact match required)
• Impedance: 50 Ohms (exact match required)
• Contact Termination: Solder Cup (exact match required)
• Mounting Type: Panel Mount (exact match required)
• Mounting Feature: Bulkhead - Rear Side Nut (exact match required)
• Frequency - Max: 4 GHz (minimum requirement)
• Number of Ports: 1 (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (required for regulatory alignment)
• REACH Status: REACH Affected (required for regulatory alignment)

The substitute part BNC-BPR-3(40) from Hirose Electric Co Ltd meets all critical electrical parameters and maintains full regulatory compliance. Variations in fastening type (Snap-On vs. Bayonet Lock), shield termination method (Solder vs. Solder Tag), and operating temperature range do not disqualify substitution when the core RF and mechanical interface parameters remain aligned.

Parameter Comparison

Engineering Selection Recommendations

Both the PL121 and BNC-BPR-3(40) maintain active product status and full ROHS3 and REACH compliance. Selection between these parts should be based on application-specific operating temperature requirements. The PL121 supports an extended operating temperature range of -65°C to 165°C, making it suitable for applications requiring operation at elevated temperatures or in extreme cold environments. The BNC-BPR-3(40) operates within -55°C to 85°C, which covers standard industrial and commercial temperature ranges.

The fastening mechanism difference (Snap-On vs. Bayonet Lock) represents a mechanical interface variation that does not affect RF performance or electrical compatibility. Both connectors maintain identical 50-ohm impedance, frequency response to 4 GHz, and solder cup termination architecture. Inventory availability and lead time considerations may also influence part selection, with the BNC-BPR-3(40) currently showing 891 pieces in stock compared to 845 pieces for the PL121.

Frequently Asked Questions (FAQ)

Q: Can BNC-BPR-3(40) be used as a direct replacement for PL121 in all applications?

A: The BNC-BPR-3(40) is electrically and mechanically compatible with PL121 for RF applications operating within the -55°C to 85°C temperature range. Applications requiring operation below -55°C or above 85°C must use the PL121 due to its extended operating temperature specification.

Q: What is the difference between Snap-On and Bayonet Lock fastening types?

A: Snap-On fastening (PL121) uses a push-to-connect mechanism, while Bayonet Lock fastening (BNC-BPR-3(40)) uses a twist-to-lock mechanism. Both provide secure panel mount connections and do not affect RF signal integrity or impedance matching.

Q: Are both connectors suitable for 50-ohm RF systems?

A: Yes. Both PL121 and BNC-BPR-3(40) are rated for 50-ohm impedance and maintain this specification across their operating frequency ranges up to 4 GHz.

Q: What is the significance of the shield termination difference (Solder vs. Solder Tag)?

A: Both termination methods provide electrical connection for the shield. Solder termination (PL121) requires direct solder connection to the shield conductor. Solder Tag termination (BNC-BPR-3(40)) includes a pre-formed tag for shield connection. Both methods are functionally equivalent for RF shielding purposes.

Q: Do both connectors include the same accessories?

A: Both connectors include 3 pieces per package: 1 connector, 1 nut, and 1 washer/solder tag. The accessory configuration differs slightly but serves the same functional purpose for panel mount installation.

Q: Are both parts RoHS and REACH compliant?

A: Yes. Both PL121 and BNC-BPR-3(40) are ROHS3 compliant and REACH affected, meeting current regulatory requirements for electronic component manufacturing and use.