Amphenol RF 31-5329 BNC Connector Jack Equivalent & Substitute Parts

Part Overview

The Amphenol RF 31-5329 is an active BNC connector jack (female socket) rated for 50 ohms impedance, designed for through-hole PCB mounting with solder termination. This coaxial RF connector operates across a frequency range up to 4 GHz and is suitable for applications requiring bayonet-lock fastening and reliable RF signal transmission. The part is ROHS3 compliant and maintains an unlimited moisture sensitivity level (MSL 1).

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part specifications, enabling direct functional replacement in PCB designs without circuit modification.

Key Parameters

Parameter	Specification
Connector Style	BNC
Connector Type	Jack, Female Socket
Impedance	50 Ohms
Mounting Type	Through Hole
Contact Termination	Solder
Shield Termination	Solder
Fastening Type	Bayonet Lock
Frequency Maximum	4 GHz
Number of Ports	1
Voltage Rating	500 V
Mating Cycles	500
Housing Color	Silver
Insertion Loss	0.2 dB
Operating Temperature Range	-65°C to 165°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are classified based on alignment with critical electrical and mechanical parameters. The following parameters determine substitution eligibility:

Core Electrical Parameters:

Connector Style: BNC
Connector Type: Jack, Female Socket
Impedance: 50 Ohms
Frequency Maximum: 4 GHz
Voltage Rating: 500 V
Mating Cycles: 500

Core Mechanical Parameters:

Mounting Type: Through Hole
Contact Termination: Solder
Shield Termination: Solder
Fastening Type: Bayonet Lock
Number of Ports: 1
Housing Color: Silver

Parametric Equivalents share all core electrical and mechanical parameters with the main part. Variations in materials (center contact material, body material, body finish, center contact plating, dielectric material) and operating temperature ranges do not prevent substitution when all core parameters align.

Similar Parts meet all core electrical and mechanical requirements but may exhibit minor variations in insertion loss specification or operating temperature range that remain within acceptable RF connector performance standards.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Connector Style	Connector Type	Impedance	Mounting Type	Frequency Max	Voltage Rating	Mating Cycles	Operating Temperature	RoHS Status	Inventory (Pcs)
31-5329	Amphenol RF	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-65°C to 165°C	ROHS3	1138
031-5329-51RFX	Amphenol RF	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-20°C to 165°C	ROHS3	2181
031-5329-52RFX	Amphenol RF	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	Not Specified	ROHS3	2854
5221123-2	TE Connectivity AMP Connectors	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-55°C to 85°C	ROHS3	3397
1-1337445-0	TE Connectivity AMP Connectors	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-65°C to 165°C	ROHS3	2400
227699-1	TE Connectivity AMP Connectors	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-55°C to 85°C	RoHS	923
5222420-1	TE Connectivity AMP Connectors	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-55°C to 85°C	RoHS	1520
5413969-2	TE Connectivity AMP Connectors	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-55°C to 85°C	ROHS3	5912
6274315-1	TE Connectivity AMP Connectors	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-55°C to 85°C	ROHS3	803
82_BNC-50-0-1/133_NE	Huber+Suhner, Inc.	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-65°C to 165°C	ROHS3	934
BSF54ZND	Lighthorse Technologies, Inc	BNC	Jack, Female Socket	50 Ohms	Through Hole	4 GHz	500 V	500	-65°C to 165°C	RoHS	2449

Engineering Selection Recommendations

Amphenol RF Parametric Equivalents (031-5329-51RFX, 031-5329-52RFX): These parts maintain full electrical and mechanical compatibility with the main part 31-5329. Both are ROHS3 compliant. The 031-5329-51RFX operates across -20°C to 165°C, while the 031-5329-52RFX does not specify an operating temperature range. Selection between these variants depends on application temperature requirements and material composition preferences (Phosphor Bronze center contact vs. Beryllium Copper).

TE Connectivity AMP Connectors Parametric Equivalents (1-1337445-0, 5413969-2): Part 1-1337445-0 (Greenpar series) matches the full operating temperature range of the main part (-65°C to 165°C) and is ROHS3 compliant. Part 5413969-2 operates across -55°C to 85°C with ROHS3 compliance. Both are suitable for applications within their respective temperature specifications.

TE Connectivity AMP Connectors Similar Parts (5221123-2, 227699-1, 5222420-1, 6274315-1): These parts meet all core electrical and mechanical parameters but operate across -55°C to 85°C. Parts 227699-1 and 5222420-1 carry RoHS compliance (not ROHS3). These are suitable for applications not requiring the extended low-temperature performance of the main part.

Huber+Suhner 82_BNC-50-0-1/133_NE: This part matches the full operating temperature range (-65°C to 165°C) and is ROHS3 compliant. REACH status is unaffected, indicating no restricted substances. This part is suitable for applications requiring extended temperature performance.

Lighthorse Technologies BSF54ZND: This part matches the full operating temperature range (-65°C to 165°C) with RoHS compliance. REACH status is unaffected. This part is suitable for applications requiring extended temperature performance.

Selection Criteria:

For applications requiring -65°C minimum operating temperature: Select 31-5329, 1-1337445-0, 82_BNC-50-0-1/133_NE, or BSF54ZND.
For applications requiring ROHS3 compliance: Select 31-5329, 031-5329-51RFX, 031-5329-52RFX, 1-1337445-0, 5413969-2, 6274315-1, or 82_BNC-50-0-1/133_NE.
For applications with standard temperature range (-55°C to 85°C): All substitute parts are suitable.

Frequently Asked Questions (FAQ)

Q: Can I substitute 031-5329-51RFX for 31-5329 in my PCB design? A: Yes. Both parts share identical BNC connector style, jack female socket configuration, 50 ohm impedance, through-hole mounting, solder termination, bayonet lock fastening, 4 GHz frequency rating, 500 V voltage rating, and 500 mating cycles. The primary difference is the operating temperature range: 031-5329-51RFX operates from -20°C to 165°C versus 31-5329 at -65°C to 165°C. Substitution is valid if your application does not require operation below -20°C.

Q: What is the difference between parametric equivalents and similar parts? A: Parametric equivalents share all core electrical and mechanical parameters with the main part, including impedance, frequency rating, voltage rating, mating cycles, mounting type, and termination method. Similar parts meet these core requirements but may have variations in insertion loss specification or operating temperature range. All listed parts in this reference meet the core parameters required for BNC 50 ohm through-hole PCB applications.

Q: Are all substitute parts ROHS3 compliant? A: No. Parts 227699-1, 5222420-1, and BSF54ZND carry RoHS compliance but not ROHS3 certification. If your application requires ROHS3 compliance, select from: 31-5329, 031-5329-51RFX, 031-5329-52RFX, 1-1337445-0, 5413969-2, 6274315-1, or 82_BNC-50-0-1/133_NE.

Q: Which substitute part has the highest inventory availability? A: TE Connectivity AMP Connectors 5413969-2 has the highest inventory with 5912 pieces in stock, followed by 031-5329-52RFX with 2854 pieces.

Q: Can I use 5221123-2 in applications requiring -65°C operation? A: No. Part 5221123-2 operates across -55°C to 85°C. For applications requiring -65°C minimum operation, select 31-5329, 1-1337445-0, 82_BNC-50-0-1/133_NE, or BSF54ZND.

Q: What materials differ between the main part 31-5329 and its Amphenol RF equivalents? A: The main part 31-5329 uses Beryllium Copper center contact, Zinc Die Cast body with tin finish, and PTFE dielectric. Equivalent 031-5329-51RFX uses Phosphor Bronze center contact, brass body with nickel finish, and PBT dielectric. Equivalent 031-5329-52RFX uses Phosphor Bronze center contact, brass body with nickel finish, and PBT/Polyester dielectric. These material variations do not affect electrical performance for 50 ohm RF applications.

Q: Is insertion loss specified for all substitute parts? A: No. The main part 31-5329 specifies 0.2 dB insertion loss. Most substitute parts do not provide insertion loss specifications in the available data. For applications where insertion loss is critical, confirm specifications with the manufacturer before selection.

Q: Which substitute parts have REACH unaffected status? A: Parts 82_BNC-50-0-1/133_NE and BSF54ZND have REACH unaffected status, indicating no restricted substances. Most other parts have REACH affected or vendor undefined status.

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