Amphenol RF 031-71004 BNC Connector Equivalent & Substitute Parts

Part Overview

The Amphenol RF 031-71004 is a BNC Connector Jack, Female Socket rated at 75 Ohms with panel mount solder cup termination. This component is classified as Active product status with 945 units currently in stock. The 031-71004 operates at frequencies up to 4 GHz and features extended insulation with a 500 V voltage rating and 500 mating cycles.

Substitute parts are necessary when the 031-71004 becomes unavailable, when alternative impedance specifications are required for system compatibility, or when different material compositions and plating options better suit specific application requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	031-71004
Manufacturer	Amphenol RF
Category	Coaxial Connectors (RF)
Connector Style	BNC
Connector Type	Jack, Female Socket
Impedance	75 Ohms
Contact Termination	Solder Cup
Shield Termination	Solder
Mounting Type	Panel Mount
Mounting Feature	Bulkhead - Rear Side Nut
Fastening Type	Bayonet Lock
Frequency - Max	4 GHz
Number of Ports	1
Features	Extended Insulation
Housing Color	Silver
Center Contact Material	Beryllium Copper
Body Material	Brass
Body Finish	Nickel
Center Contact Plating	Gold
Dielectric Material	Polytetrafluoroethylene (PTFE)
Voltage Rating	500 V
Mating Cycles	500
Insertion Loss	0.2 dB
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the 031-71004 are grouped based on the following critical parameters that determine functional compatibility:

Primary Substitution Criteria:

Connector Style: BNC
Connector Type: Jack, Female Socket
Contact Termination: Solder Cup
Shield Termination: Solder
Mounting Type: Panel Mount
Mounting Feature: Bulkhead - Rear Side Nut
Fastening Type: Bayonet Lock
Frequency - Max: 4 GHz
Number of Ports: 1
Features: Extended Insulation
Voltage Rating: 500 V
Mating Cycles: 500

Secondary Variation Parameters:

Impedance: 75 Ohms (main part) vs. 50 Ohms (substitute parts)
Center Contact Material: Beryllium Copper vs. Phosphor Bronze vs. Brass
Body Material: Brass vs. Zinc
Body Finish: Nickel vs. Silver
Center Contact Plating: Gold vs. Silver vs. Tin
Dielectric Material: PTFE vs. PBT vs. Fluoropolymer
Operating Temperature: Not specified (main part) vs. -65°C ~ 165°C (substitute parts)
RoHS Status: ROHS3 Compliant vs. RoHS non-compliant
Product Status: Active vs. Obsolete

The primary difference between the 031-71004 and available substitutes is impedance specification. The main part operates at 75 Ohms, while all identified substitute parts operate at 50 Ohms. This impedance difference requires system-level evaluation for compatibility.

Parameter Comparison

Parameter	031-71004	31-102	31-221	31-2221	1-1337451-0	227754-1	227754-2	227754-3	5227715-3	5227754-1
Manufacturer	Amphenol RF	Amphenol RF	Amphenol RF	Amphenol RF	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity	TE Connectivity
Connector Style	BNC	BNC	BNC	BNC	BNC	BNC	BNC	BNC	BNC	BNC
Connector Type	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket	Jack, Female Socket
Impedance	75 Ohms	50 Ohms	50 Ohms	50 Ohms	50 Ohms	50 Ohms	50 Ohms	50 Ohms	50 Ohms	50 Ohms
Contact Termination	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup	Solder Cup
Shield Termination	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder	Solder
Mounting Type	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount	Panel Mount
Mounting Feature	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut	Bulkhead - Rear Side Nut
Fastening Type	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock	Bayonet Lock
Frequency - Max	4 GHz	4 GHz	4 GHz	4 GHz	4 GHz	4 GHz	4 GHz	4 GHz	4 GHz	4 GHz
Number of Ports	1	1	1	1	1	1	1	1	1	1
Features	Extended Insulation	Extended Insulation	Extended Insulation	Extended Insulation	Extended Insulation	Extended Insulation	Extended Insulation	Extended Insulation	Extended Insulation	Extended Insulation
Housing Color	Silver	Silver	Silver	Silver	Silver	Silver	Silver	Silver	Silver	Silver
Voltage Rating	500 V	500 V	500 V	500 V	500 V	500 V	500 V	500 V	500 V	500 V
Mating Cycles	500	500	500	500	500	500	500	500	500	500
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS non-compliant	RoHS non-compliant	RoHS non-compliant	RoHS Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active	Active	Active	Active	Active	Obsolete	Active

Engineering Selection Recommendations

Amphenol RF Substitutes (50 Ohm):

The Amphenol RF parts 31-102, 31-221, and 31-2221 are all Active status BNC connectors with 50 Ohm impedance. These parts maintain the same manufacturer lineage as the 031-71004 and are ROHS3 Compliant. Part 31-102 includes a gasket in addition to lockwasher and nut. Parts 31-221 and 31-2221 include lockwasher and nut. All three maintain the same 4 GHz frequency rating, 500 V voltage rating, and 500 mating cycles specification. The primary material difference is center contact composition: 31-102 and 31-221 use Beryllium Copper and Phosphor Bronze respectively, while 31-2221 uses Phosphor Bronze with different plating.

TE Connectivity Substitutes (50 Ohm):

TE Connectivity AMP Connectors offers multiple 50 Ohm BNC jack options. Part 1-1337451-0 (Greenpar series) is Active status and ROHS3 Compliant with Brass center contact material and Silver body finish. Parts 227754-1, 227754-2, and 227754-3 are Active status but RoHS non-compliant with Phosphor Bronze center contact material and Zinc body material. Part 5227715-3 is Obsolete status and RoHS Compliant with Beryllium Copper center contact and Fluoropolymer dielectric. Part 5227754-1 is Active status and ROHS3 Compliant with Phosphor Bronze center contact and PBT dielectric.

Compliance Considerations:

For applications requiring ROHS3 compliance, select from: 31-102, 31-221, 31-2221, 1-1337451-0, or 5227754-1. Parts 227754-1, 227754-2, and 227754-3 are RoHS non-compliant and unsuitable for regulated applications. Part 5227715-3 is Obsolete and should not be selected for new designs.

Impedance Consideration:

All substitute parts operate at 50 Ohms impedance, while the 031-71004 operates at 75 Ohms. This impedance difference requires system-level evaluation to determine compatibility with existing cable and equipment specifications.

Frequently Asked Questions (FAQ)

Q: Can I directly substitute a 50 Ohm BNC connector for the 75 Ohm 031-71004?

A: Direct substitution requires system-level evaluation. The 031-71004 is specified at 75 Ohms impedance, while all identified substitute parts operate at 50 Ohms. Impedance mismatch can introduce signal reflections and affect system performance. Compatibility depends on the specific application requirements and cable specifications.

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

A: Both manufacturers provide BNC jack connectors with equivalent mechanical and electrical specifications at 50 Ohms. Amphenol RF parts (31-102, 31-221, 31-2221) maintain the same manufacturer as the original part. TE Connectivity parts (1-1337451-0, 227754 series, 5227754-1) offer alternative sourcing. All Active status parts meet the same frequency, voltage, and mating cycle specifications.

Q: Which substitute part should I select for RoHS-regulated applications?

A: For ROHS3 compliance, select from: Amphenol RF 31-102, 31-221, or 31-2221; TE Connectivity 1-1337451-0 or 5227754-1. Parts 227754-1, 227754-2, and 227754-3 are RoHS non-compliant and unsuitable for regulated environments.

Q: What is the significance of center contact material differences?

A: Center contact materials vary between Beryllium Copper, Phosphor Bronze, and Brass across substitute parts. These materials affect electrical conductivity, mechanical durability, and contact resistance characteristics. Selection depends on specific application requirements for contact performance and reliability.

Q: Are there packaging differences between substitute parts?

A: Yes. Amphenol RF 31-102 includes a gasket, lockwasher, and nut (4 pcs total). Amphenol RF 31-221 and 31-2221 include lockwasher and nut (3 pcs). TE Connectivity parts 1-1337451-0, 227754 series, and 5227754-1 include lockwasher and nut (3 pcs). The 031-71004 packaging information is not specified in the provided data.

Q: Why is part 5227715-3 listed as Obsolete?

A: Part 5227715-3 carries Obsolete product status, indicating it is no longer in active production. While 934 units are currently in stock, this part should not be selected for new designs. Active status alternatives are preferred for long-term supply assurance.

Q: What dielectric material differences exist between substitute parts?

A: The 031-71004 uses Polytetrafluoroethylene (PTFE) dielectric. Substitute parts use PTFE, Polybutylene Terephthalate (PBT), or Fluoropolymer (FP). PTFE provides superior high-frequency performance and temperature stability. PBT and FP offer alternative material properties suitable for specific applications.

Q: How do body material and finish affect connector selection?

A: The 031-71004 uses Brass body with Nickel finish. Substitute parts use Brass with Nickel or Silver finish, or Zinc with Nickel finish. Body material and finish affect corrosion resistance, mechanical strength, and environmental durability. Brass with Nickel finish provides standard performance characteristics consistent with the original part.

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