Product details

This SMA female to female feed thru bulkhead coupler provides the ability to pass a coaxial connection through a panel or bulkhead utilizing a standard .300" single D mounting hole. A common use for this device is to create a connection point on either side of a wall or other obstruction.

Name: BA21
SKU: BA21

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

Part number (MPN)

BA21

Impedance

50 Ohm

Frequency

Interface

SMA

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.

Custom RF cable from drawing →

WhatsApp — Quick Reply

Lead time: 3–6 wks | MOQ: 200+ pcs

Before RFQ Clear inputs speed up review. ⌄

• 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.

How we review alternatives

Image

Click image to enlarge.

Specifications

BA21

Specifications for BA21
Interface	Coaxial Adapters
Interface	SMA
Interface	SMA
Impedance	50 Ohm
Impedance	50 Ohm
Frequency (max)	DC
Frequency (max)	6 GHz
Gender	Female
Gender	Female
Adapter Body Style	Straight
Connector Body Material 1	Brass
Connector Body Material 2	Brass

Show 9 more specs

Connector Body Plating 1	Nickel
Connector Body Plating 2	Nickel
Connector Polarity 1	Standard
Connector Polarity 2	Standard
Mounting	Bulkhead
Mounting	None
Category	Coaxial Adapters
Application	Coax retrofit applications; Coaxial Extension; OEM coax applications; Coaxial interface conversion
Product Features	Complete with nut, gasket and lockwasher mounting hardware; Gold plated center contact for reduced signal loss; Nickel plated body for enhanced corrosion resistance; Provides 50 Ohm signal feed-thru for two SMA male interface devices; Single D bulkhead design for panel mounting

Description

Current reference data for BA21: SMA · 50 Ohm · DC. Impedance is listed as 50 Ohm. If that parameter is critical, confirm it again in RFQ. Frequency is listed as DC. The real operating limit still depends on the assembly, mating pair, and application context. Mounting is listed as Bulkhead. 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)

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

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

Open contact form

Engineer checklist (key parameters)

Interface SMA

Gender Female

Impedance 50 Ohm

Frequency (max) DC

Mounting Bulkhead

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

FAQ

What connector interface/type does BA21 use?

According to our catalog data, BA21 lists the interface/type as: SMA. To confirm mechanical fit, send an RFQ and we will validate against your drawing/spec.

What is the impedance of BA21?

Our catalog lists the impedance for BA21 as: 50 Ohm. If impedance is critical for your application, include the requirement in your RFQ and we will confirm.

What mounting style does BA21 use?

Our catalog lists the mounting style for BA21 as: Bulkhead. If you have panel/bulkhead/flange constraints, attach a drawing in the RFQ.

Similar Connectors

Related models:

PE39342H

Violet FAKRA Plug to SMA Male Low Loss Cable Using PE-C100-LSZH Coax

View details →

PE3W07334

SMA Female Bulkhead to SMA Female Cable Using RG316 Coax

View details →

415-0041-024

RF Cable Assemblies SMA RA PLG TO PLG RG-58 24"

View details →

FMCN5271

RA SMA Male (Plug) Connector Crimp/Solder Attachment for RG58CU, LMR-195, LMR-195-FR, LMR-195-LLPL, LMR-195-UF, LMR-LW195, RG303HV Cable

View details →

PE3173

BNC Female to SMA Male Cable Using RG142 Coax

View details →

901-10654

SMA PCB Surface Mount Straight Jack 50 Ohm Extended Body

View details →

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.