Product details

RF Connectors / Coaxial Connectors BNC BLKD JK INSL Rear MNT

Name: UBJ21
SKU: UBJ21

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

Part number (MPN)

UBJ21

Impedance

75 Ohms

Frequency

500 MHz

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.
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• Attach the drawing or the key fit requirements.

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Specifications

UBJ21

Specifications for UBJ21
Interface	RF Connectors / Coaxial Connectors
Interface	BNC
Impedance	75 Ohms
Frequency (max)	-
Frequency (max)	500 MHz
Gender	Jack (Female)
Orientation	Straight
Body Style	Bulkhead
Termination	Crimp
Body Material	Brass
Termination	Gold
Product	Connectors

Show 4 more specs

Product Category	RF Connectors / Coaxial Connectors
Subcategory	RF Interconnects
Body Finish	Nickel
RoHS	Y

Description

Current reference data for UBJ21: 75 Ohms · 500 MHz · Straight. The catalog currently lists the configuration as: Straight · Crimp. Impedance is listed as 75 Ohms. If that parameter is critical, confirm it again in RFQ. Frequency is listed as 500 MHz. 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 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

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Engineer checklist (key parameters)

Interface BNC

Gender Jack (Female)

Orientation Straight

Impedance 75 Ohms

Frequency (max) 500 MHz

Termination Crimp

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

FAQ

What is the impedance of UBJ21?

Our catalog lists the impedance for UBJ21 as: 75 Ohms. If impedance is critical for your application, include the requirement in your RFQ and we will confirm.

What frequency is UBJ21 rated for?

Our catalog lists the frequency for UBJ21 as: 500 MHz. 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 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.