Product details

RF Adapters - Between Series SMA (F) to SMB (M)

Name: 72978
SKU: 72978

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

Part number (MPN)

72978

Impedance

50 Ohms

Frequency

DC to 4 GHz

Interface

SMA SMB

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

72978

Specifications for 72978
Interface	SMA SMB
Interface	RF Adapters - Between Series
Interface	SMB
Interface	SMA
Impedance	50 Ohms
Frequency (max)	DC to 4 GHz
Frequency (max)	DC
Frequency (max)	4 GHz
Gender	Plug (Male)
Gender	Plug (Male)
Body Material	Brass
Termination	Gold

Show 7 more specs

Product Category	RF Adapters - Between Series
Adapter Style	Straight
Subcategory	RF Adapters
Shell Plating	Gold
Side 1 Polarity	Normal
Part # Aliases	3094434
RoHS	Y

Description

Current reference data for 72978: SMA SMB · 50 Ohms · DC to 4 GHz. Impedance is listed as 50 Ohms. If that parameter is critical, confirm it again in RFQ. Frequency is listed as DC to 4 GHz. The real operating limit still depends on the assembly, mating pair, and application context. If mounting is missing here, confirm it from the drawing or mating requirement. 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 SMB

Gender Plug (Male)

Impedance 50 Ohms

Frequency (max) DC to 4 GHz

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

FAQ

What connector interface/type does 72978 use?

According to our catalog data, 72978 lists the interface/type as: SMA SMB. To confirm mechanical fit, send an RFQ and we will validate against your drawing/spec.

What is the impedance of 72978?

Our catalog lists the impedance for 72978 as: 50 Ohms. If impedance is critical for your application, include the requirement in your RFQ and we will confirm.

What frequency is 72978 rated for?

Our catalog lists the frequency for 72978 as: DC to 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.

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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.