Product details

Jack, Female Socket connector; configuration: Straight; impedance 50 Ω; frequency 4 GHz; mounting Bulkhead, Panel

Name: 31-221-RFX
SKU: 31-221-RFX

China-sourced compatible alternative — fit confirmed by drawing/spec review.

Part number (MPN)

31-221-RFX

Impedance

50 Ω

Frequency

4 GHz

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We coordinate supplier-qualified RF connector and cable assembly sourcing from drawings, samples, or BOM. Typical production lead time is 3–6 weeks after drawing/spec review; feasibility, MOQ, and fit are confirmed by RFQ.

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Lead time: 3–6 wks | MOQ: 200+ pcs

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• Share the reference MPN and source brand if it matters.
• Add the BOM and volume split for production projects.
• Attach the drawing or the key fit requirements.

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Specifications

31-221-RFX

Specifications for 31-221-RFX
Interface	Coaxial Connectors (RF)
Impedance	50 Ω
Frequency (max)	4 GHz
Orientation	Straight
Termination	Solder
Mounting	Bulkhead, Panel
Body Material	Brass
Body Plating	Nickel
Termination	Bronze, Copper
Termination	Gold
Part Number	31-221-RFX
IP rating	In Stock. Alternative Models Available.

Show 24 more specs

Lifecycle	New From This Manufacturer
Delivery	DHL、UPS、FedEx、Registered Mail
Payment	T/T Paypal Visa MoneyGram Western Union
More Information	31-221-RFX More Information
ECAD	Request Free CAD Models
Pricing(USD)	$2.11
Remark	Manufacturer: Connex (Amphenol RF). Rozee Is One Of The Distributors. Wide Range Of Applications.
Mounting	Bulkhead, Panel
Packaging	Bulk
Schedule B	8536695050
Insulation Material	Polytetrafluoroethylene
Min Operating Temperature	-65 °C
Products Category	Connectors, Interconnects - Coaxial Connectors (RF)
Qty	2470 In Stock
Applications	Portable Electronics Home Theater & Entertainment PC & Notebooks
Length	27 Mm
Resistance	50 Ω
Voltage Rating	500 V
Max Operating Temperature	165 °C
Model Number	31-221-RFX
Category	Coaxial Connectors (RF)
Electrical Rating	500 V
Body Finish	Nickel
Signal Performance	0.2dB

Description

Current reference data for 31-221-RFX: 50 Ω · 4 GHz · Bulkhead, Panel. The catalog currently lists the configuration as: Straight · Solder. Impedance is listed as 50 Ω. If that parameter is critical, confirm it again in RFQ. Frequency is listed as 4 GHz. The real operating limit still depends on the assembly, mating pair, and application context. Mounting is listed as Bulkhead, Panel. If panel, bulkhead, or flange constraints matter, send the dimensions with the RFQ. Material is listed as Brass. That is useful for review, but it does not replace full project stack-up confirmation. Use this page to shortlist before RFQ, not as the final sign-off.

Use this page to shortlist before RFQ. MOQ 200+ custom production and supply path are confirmed after drawing/spec/BOM review; no spot stock is assumed.

Request Quote (RFQ)

Cstone is a professional factory—not a trading company—specializing in RF and coaxial connectors, adapters, and cable assemblies, including N-type, BNC, SMA, SMP, SSMB, MMCX, and more. We manufacture custom connectors to 2D drawings or samples; fit, MOQ, lead time, and production details are confirmed by RFQ. Factory-made production to 2D drawings or samples; MOQ 200+ and typical 3–6 week lead time are confirmed after drawing/spec/BOM review. Physical inventory is not promised; production details are confirmed by RFQ.

Drawing / spec review MOQ / lead-time check RF connectors Adapters Cable assemblies

Why work with us?

Form-Fit-Function compatibility confirmed by drawing/spec review
Commercially competitive alternative for replacement and sourcing projects
MOQ 200+ and lead time confirmed by model, quantity, and supply path

Working hours: 10:00–20:00 (Beijing Time, UTC+8)

We typically reply within 1 business day (subject to workload and time zones).

Need a brand replacement workflow? Open the general brief → Need an approved alternative or cost-down workflow? Open the procurement brief →

Related RF sourcing routes

If this MPN is only a reference point, continue with a replacement, equivalent, adapter, or drawing-based cable assembly review.

Brand replacement briefs SMA alternatives from China BNC connector equivalents N Type RF replacement Custom RF cable from drawing

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Engineer checklist (key parameters)

Interface Coaxial Connectors (RF)

Orientation Straight

Impedance 50 Ω

Frequency (max) 4 GHz

Mounting Bulkhead, Panel

Termination Solder

If these parameters are critical, include them in the RFQ.

FAQ

What is the impedance of 31-221-RFX?

Our catalog lists the impedance for 31-221-RFX as: 50 Ω. If impedance is critical for your application, include the requirement in your RFQ and we will confirm.

What frequency is 31-221-RFX rated for?

Our catalog lists the frequency for 31-221-RFX as: 4 GHz. Actual performance depends on assembly/materials/application — send an RFQ so we can confirm a suitable option.

What mounting style does 31-221-RFX use?

Our catalog lists the mounting style for 31-221-RFX as: Bulkhead, Panel. If you have panel/bulkhead/flange constraints, attach a drawing in the RFQ.

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MPN Search Supports exact, prefix, and partial matching. ⌄

Supports exact, prefix, and partial matching.

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Disclaimer

Manufacturer names, trademarks, symbols, and part numbers are used for identification and cross-reference only. Cstone Technology operates its own factory for RF/coaxial connectors, adapters, and cable assemblies and is not a trading company or affiliated with the original brands. Trademarks remain the property of their respective owners. Final suitability is confirmed by drawing/spec review during RFQ.