Molex 0731385013 BNC Connector Jack Equivalent & Substitute Parts

Part Overview

The Molex 0731385013 is an active BNC connector jack designed for 50-ohm coaxial RF applications. This female socket connector features right-angle panel mount through-hole termination with solder contact and shield termination. The connector includes a bulkhead front-side nut fastening mechanism and bayonet lock coupling. With 811 units in current stock and ROHS3 compliance, this part serves as a standard interface component in RF signal distribution systems. Substitute parts are identified based on matching electrical impedance, mechanical mounting configuration, and connector interface specifications.

Key Parameters

Parameter	Molex 0731385013
Connector Style	BNC
Connector Type	Jack, Female Socket
Impedance	50 Ohms
Mounting Type	Panel Mount, Through Hole, Right Angle
Contact Termination	Solder
Shield Termination	Solder
Fastening Type	Bayonet Lock
Number of Ports	1
Mating Cycles	500
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the Molex 0731385013 are qualified based on the following critical parameters that must match or exceed the original specification:

Mandatory Matching Parameters:

Connector Style: BNC
Connector Type: Jack, Female Socket
Impedance: 50 Ohms
Mounting Type: Panel Mount, Through Hole, Right Angle
Contact Termination: Solder
Shield Termination: Solder
Fastening Type: Bayonet Lock
Number of Ports: 1
Mating Cycles: 500 minimum

All identified substitute parts meet these core electrical and mechanical requirements. Variations in packaging format (Bulk, Bag, Tray, Tube), frequency rating, dielectric material, and center contact plating do not affect functional interchangeability for standard 50-ohm RF applications.

Parameter Comparison

Part Number	Manufacturer	Impedance	Mounting	Frequency Max	Operating Temp	Voltage Rating	Mating Cycles	RoHS Status	Packaging	Inventory
0731385013	Molex	50 Ohms	Panel Mount, Through Hole, Right Angle	-	-	-	500	ROHS3 Compliant	Bulk	811
031-5431-1010	Amphenol RF	50 Ohms	Panel Mount, Through Hole, Right Angle	1 GHz	-55°C ~ 85°C	500 V	500	ROHS3 Compliant	Bulk	1141
031-5538	Amphenol RF	50 Ohms	Panel Mount, Through Hole, Right Angle	1 GHz	-55°C ~ 85°C	500 V	500	ROHS3 Compliant	Bag	1174
031-5538-1010	Amphenol RF	50 Ohms	Panel Mount, Through Hole, Right Angle	1 GHz	-55°C ~ 85°C	500 V	500	ROHS3 Compliant	Tray	1037
227161-2	TE Connectivity AMP Connectors	50 Ohms	Panel Mount, Through Hole, Right Angle	4 GHz	-55°C ~ 85°C	500 V	500	RoHS non-compliant	Tube	1748
227676-1	TE Connectivity AMP Connectors	50 Ohms	Panel Mount, Through Hole, Right Angle	4 GHz	-55°C ~ 85°C	500 V	500	ROHS3 Compliant	Tray	1140
31-5431-2010	Amphenol RF	50 Ohms	Panel Mount, Through Hole, Right Angle	1 GHz	-55°C ~ 85°C	500 V	500	ROHS3 Compliant	Bulk	1192
5227161-3	TE Connectivity AMP Connectors	50 Ohms	Panel Mount, Through Hole, Right Angle	4 GHz	-55°C ~ 85°C	500 V	500	ROHS3 Compliant	Bulk	1142

Engineering Selection Recommendations

ROHS3 Compliant Substitutes (Preferred for Regulated Applications): Parts 031-5431-1010, 031-5538, 031-5538-1010, 227676-1, 31-5431-2010, and 5227161-3 all carry ROHS3 compliance matching the original Molex 0731385013. These parts are suitable for applications requiring environmental and regulatory compliance certification.

Non-Compliant Alternative: Part 227161-2 is RoHS non-compliant and should be selected only when legacy system compatibility or specific design requirements mandate its use.

Frequency Capability Considerations: Amphenol RF parts (031-5431-1010, 031-5538, 031-5538-1010, 31-5431-2010) are rated to 1 GHz maximum frequency. TE Connectivity parts (227161-2, 227676-1, 5227161-3) are rated to 4 GHz maximum frequency. Selection depends on the actual operating frequency of the RF signal path.

Packaging and Inventory: All substitute parts maintain equivalent electrical and mechanical specifications. Packaging format selection (Bulk, Bag, Tray, Tube) depends on procurement and assembly workflow requirements. TE Connectivity 227161-2 offers the highest current inventory at 1748 units.

Frequently Asked Questions (FAQ)

Q: Can I substitute any of these parts directly into a circuit designed for the Molex 0731385013?

A: Yes, all listed substitute parts share identical BNC jack configuration, 50-ohm impedance, right-angle panel mount through-hole termination, and bayonet lock fastening. Direct mechanical and electrical substitution is supported without circuit modification.

Q: What is the difference between the Amphenol RF and TE Connectivity options?

A: Both manufacturers provide functionally equivalent BNC jack connectors. The primary differences are frequency rating (Amphenol RF: 1 GHz maximum; TE Connectivity: 4 GHz maximum), dielectric material (Amphenol RF uses Polypropylene; TE Connectivity uses Polymethylpentene), and center contact plating (Amphenol RF: Gold; TE Connectivity 227161-2: Tin; TE Connectivity 227676-1 and 5227161-3: Gold). Selection depends on application frequency requirements and compliance mandates.

Q: Does packaging format affect connector performance?

A: No. Packaging format (Bulk, Bag, Tray, Tube) is a logistics and assembly consideration only. All parts within the same electrical and mechanical specification perform identically regardless of packaging.

Q: Why is part 227161-2 marked as RoHS non-compliant?

A: Part 227161-2 does not meet ROHS3 environmental compliance standards. It should be used only in applications where legacy component specifications or non-regulated markets permit non-compliant materials.

Q: Are all substitute parts rated for 500 mating cycles?

A: Yes. All listed substitute parts are rated for a minimum of 500 mating cycles, matching the original Molex 0731385013 specification.

Q: Which substitute part should I select for a new design?

A: For new designs requiring regulatory compliance, select from ROHS3-compliant options: 031-5431-1010, 031-5538, 031-5538-1010, 227676-1, 31-5431-2010, or 5227161-3. If the application operates above 1 GHz, prioritize TE Connectivity parts (227676-1 or 5227161-3) for their 4 GHz frequency rating.

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