Product details

RF Adapters - Between Series SMA F/BNC F

Name: 4291
SKU: 4291

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

Part number (MPN)

4291

Impedance

50 Ohms

Frequency

DC to 12.4 GHz

Interface

SMA BNC

Need a custom version from drawing?

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

4291

Specifications for 4291
Interface	SMA BNC
Interface	RF Adapters - Between Series
Interface	SMA
Interface	BNC
Impedance	50 Ohms
Frequency (max)	DC to 12.4 GHz
Frequency (max)	DC
Frequency (max)	12.4 GHz
Gender	Jack (Female)
Gender	Jack (Female)
Body Material	Copper
Termination	Gold

Show 8 more specs

Part # Aliases	1918222
Product Category	RF Adapters - Between Series
Unit Weight	0.432000 oz
Shell Plating	Gold
Adapter Style	Straight
RoHS	Y
Subcategory	RF Adapters
Side 1 Polarity	Normal

Description

Current reference data for 4291: SMA BNC · 50 Ohms · DC to 12.4 GHz. Impedance is listed as 50 Ohms. If that parameter is critical, confirm it again in RFQ. Frequency is listed as DC to 12.4 GHz. The real operating limit still depends on the assembly, mating pair, and application context. For higher-frequency projects, include the drawing, cable path, and critical requirements in the first RFQ. If mounting is missing here, confirm it from the drawing or mating requirement. Material is listed as Copper. 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)

B2B RFQ sourcing from China for compatible alternatives and supplier-coordinated custom production. MOQ 200+, typical lead time 3–6 weeks after drawing/spec/BOM review; no physical stock is promised.

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

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 RF Adapters - Between Series

Gender Jack (Female)

Impedance 50 Ohms

Frequency (max) DC to 12.4 GHz

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

FAQ

What connector interface/type does 4291 use?

According to our catalog data, 4291 lists the interface/type as: SMA BNC. To confirm mechanical fit, send an RFQ and we will validate against your drawing/spec.

What is the impedance of 4291?

Our catalog lists the impedance for 4291 as: 50 Ohms. If impedance is critical for your application, include the requirement in your RFQ and we will confirm.

What frequency is 4291 rated for?

Our catalog lists the frequency for 4291 as: DC to 12.4 GHz. Actual performance depends on assembly/materials/application — send an RFQ so we can confirm a suitable option.

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

Supports exact, prefix, and partial matching.

000-10400 000-1 00010400

Disclaimer

Manufacturer names, trademarks, symbols, and part numbers are used for identification and cross-reference only. Cstone Technology is a China-based export sourcing partner for compatible alternatives and is not affiliated with the original brands. Trademarks remain the property of their respective owners. Final suitability is confirmed by drawing/spec review during RFQ.