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Home > Products > Connectors, Interconnects > Coaxial Connectors (RF) - Coaxial Connector (RF) Assemblies > 28S208-272N5
Rosenberger
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28S208-272N5

In Stock 7244 pcs Reference Price(In US Dollars)
1+
$8.8872
10+
$8.0003
25+
$7.5362
50+
$7.3429
100+
$7.1497
250+
$6.3767
500+
$5.9902
1000+
$5.2946
Manufacturer Part Number:
28S208-272N5
Manufacturer / Brand
Rosenberger
Part of Description:
CONN QMA PLUG R/A 50OHM SOLDER
Datasheets:
28S208-272N5.pdf
Lead Free Status / RoHS Status:
RoHS Compliant
Stock Condition:
New original, 7244 pcs Stock Available.
ECAD Model:
Ship From:
Hong Kong
Shipment Way:
DHL/Fedex/TNT/UPS

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Part Number 28S208-272N5
Manufacturer / Brand Rosenberger
Stock Quantity 7244 pcs Stock
Category Connectors, Interconnects > Coaxial Connectors (RF) - Coaxial Connector (RF) Assemblies
Description CONN QMA PLUG R/A 50OHM SOLDER
Lead Free Status / RoHS Status: RoHS Compliant
Voltage Rating 335 V
Shield Termination Solder
Series -
Package Bulk
Operating Temperature -40°C ~ 85°C
Number of Ports 1
Mounting Type Free Hanging (In-Line), Right Angle
Mounting Feature -
Mating Cycles 100
Insertion Loss -
Ingress Protection -
Includes -
Impedance 50Ohm
Housing Color Silver
Frequency - Max 18 GHz
Features -
Fastening Type Snap-On
Dielectric Material Polytetrafluoroethylene (PTFE)
Contact Termination Solder
Connector Type Plug, Male Pin
Connector Style QMA
Center Contact Plating Gold
Center Contact Material Brass
Cable Group RG-402 (.141" Semi Rigid)
Body Material Brass
Body Finish White Bronze
Base Product Number 28S208

Packaging & ESD

Industry-standard static shielding packaging is used for electronic components.Anti-static, light-transparent materials allow easy identification of ICs and PCB assemblies.
The packaging structure provides electrostatic protection based on Faraday cage principles.This helps protect sensitive components from static discharge during handling and transportation.


All products are packed in ESD-safe anti-static packaging. Outer packaging labels include part number, brand, and quantity for clear identification. Goods are inspected prior to shipment to ensure proper condition and authenticity.

ESD protection is maintained throughout packing, handling, and global transportation. Secure packaging provides reliable sealing and resistance during transit. Additional cushioning materials are applied when required to protect sensitive components.

QC(Part Testing by IC Components)Quality Warranty

We can offer worldwide express delivery service, such as DHLor FedEx or TNT or UPS or other forwarder for shipment.

Global Shipment by DHL/FedEx/TNT/UPS

Shipping Fees reference DHL/FedEx
1). You can offer your express delivery account for shipment, ifyou haven’t any express account for shipment, we can offer our account inadvance.
2). Use our account for shipment, Shipment charges(Reference DHL/FedEx, Different Countries has different price.)
Shipment charges： (Reference DHL and FedEX)
Weight(KG): 0.00kg-1.00kg Price(USD$) : USD$60.00
Weight(KG): 1.00kg-2.00kg Price(USD$) : USD$80.00
* The price of cost is reference with DHL/FedEx. The detail charges, please contact us. Different country the express charges are different.



We accept the payment terms: Telegraphic Transfer(T/T), Credit Card, PayPal and Western Union.

PayPal:

PayPal Bank Information:
Company Name : IC COMPONENTS LTD
Paypal ID: Info@IC-Components.com

BANK TRANSFAR (Telegraphic Transfer)

Payment For Telegraphic Transfers:
Company Name : IC COMPONENTS LTD Beneficiary Account Number : 549-100669-701
Beneficiary Bank name : Bank of Communications (Hong Kong) Ltd Beneficiary Bank Code : 382 (for local payment)
Beneficiary Bank SWIFT : COMMHKHK
Beneficiary Bank Address : Tsuen Wan Market Street Branch 53 Market Street, Tsuen Wan N.T., Hong Kong

Any inquires or questions, please kindly contact us Email: Info@IC-Components.com


Frequently Asked Questions

Can Rosenberger 28S208-272N5 be used with RG-402 (.141 inch semi-rigid) cable in a right-angle in-line RF assembly?
Yes. Rosenberger 28S208-272N5 is specified for RG-402 (.141 inch semi-rigid) and is intended for a free-hanging right-angle solder termination. In practice, it fits well when the assembly needs a compact bend radius and controlled 50 ohm routing. The solder joints on the center contact and shield need good process control so the semi-rigid cable geometry is preserved and the impedance stays stable.
Is Rosenberger 28S208-272N5 suitable for replacing an existing QMA plug in a 50 ohm RF system?
Rosenberger 28S208-272N5 can be used as a replacement when the mating interface is QMA and the cable is RG-402. The main checks are mechanical keying, cable preparation dimensions, and whether the existing assembly expects a straight or right-angle plug. If the original part used crimp or a different dielectric profile, the replacement can change assembly handling and cable stress even if the connector family matches.
What should I check before designing Rosenberger 28S208-272N5 into an 18 GHz RF path?
With Rosenberger 28S208-272N5, verify the full interconnect chain rather than only the connector rating. At 18 GHz, small discontinuities from cable strip length, solder fillets, bend radius, and the mating connector quality can affect return loss and insertion loss. A controlled assembly process and a short, repeatable transition into the semi-rigid cable are usually more important than the connector model alone.
Is Rosenberger 28S208-272N5 appropriate for outdoor or sealed industrial equipment?
Rosenberger 28S208-272N5 does not list an ingress protection rating, so it is generally better suited to protected enclosures or assemblies that provide their own sealing strategy. If the application sees moisture, dust, or washdown exposure, the design should add environmental sealing at the enclosure entry or choose an interconnect intended for sealed service.
Can Rosenberger 28S208-272N5 handle industrial temperature cycling and long-term field use?
Rosenberger 28S208-272N5 is rated for -40°C to 85°C, which covers many industrial environments. For long-term use, the main risks are not only ambient temperature but also repeated thermal cycling and mechanical strain on the semi-rigid cable. Good strain relief and stable mounting reduce stress on the solder terminations and help keep contact repeatability over time.
How does Rosenberger 28S208-272N5 compare with SMA or SMB connectors for a retrofit project?
Rosenberger 28S208-272N5 uses the QMA interface, which is a snap-on style connector, so it behaves differently from threaded SMA connectors during assembly and maintenance. Compared with SMA, QMA can speed installation and reduce torque handling, but the system must already be built around QMA mating geometry. It is not a drop-in substitute for SMA or SMB without checking the mating pair, panel interface, and electrical transition.
What are the practical trade-offs of using the snap-on coupling on Rosenberger 28S208-272N5?
The snap-on coupling of Rosenberger 28S208-272N5 makes mating faster and simplifies repeated disconnects in dense assemblies. The trade-off is that the assembly depends on the correct QMA mating interface and proper axial alignment. In high-vibration or service-accessible systems, the user should confirm that the connector retention and cable support meet the mechanical requirements of the installation.
Is Rosenberger 28S208-272N5 a good choice when I need low-loss interconnects for laboratory test fixtures?
Rosenberger 28S208-272N5 can work well in test fixtures when the fixture uses QMA and RG-402 semi-rigid cable. The right-angle form factor helps with compact routing, but the real loss budget will depend on cable length, bend geometry, and the number of mated interfaces. For calibrated measurement setups, the connector launch and repeatability should be validated with the actual fixture build, not just the standalone part rating.
What should I consider if I want to migrate from a straight plug to Rosenberger 28S208-272N5?
Moving to Rosenberger 28S208-272N5 changes the cable exit direction and can reduce bend stress in tight enclosures. Before switching, check clearance around adjacent hardware, cable routing, and whether the right-angle body interferes with shielding cans, brackets, or neighboring ports. In some layouts, the right-angle version improves mechanics but requires a different assembly sequence.
How does Rosenberger 28S208-272N5 behave in a 50 ohm signal chain with mixed connector brands?
Rosenberger 28S208-272N5 is a 50 ohm QMA plug, so it can interoperate with compatible QMA receptacles from other vendors if the interface is mechanically and dimensionally compliant. The practical concern is variation in contact geometry and wear over multiple mating cycles. For mixed-brand systems, it is useful to verify insertion force, retention feel, and RF performance in the actual pair, especially near the upper frequency range.
Does Rosenberger 28S208-272N5 require special assembly skill for solder termination?
Yes, Rosenberger 28S208-272N5 is a solder-termination connector, so the build quality depends on controlled heat, clean stripping, and consistent center conductor positioning. Semi-rigid RG-402 assemblies are less forgiving than flexible coax when the cable is overheated or mechanically distorted. A stable jig and a repeatable solder process help prevent dielectric movement and impedance shifts.
How many mating cycles should I expect from Rosenberger 28S208-272N5 in a maintenance-heavy system?
Rosenberger 28S208-272N5 is specified for 100 mating cycles. In a maintenance-heavy system, that number should be treated as a design reference for connector wear, not a guarantee of identical RF performance throughout life. If the connector will be unplugged frequently, it is sensible to plan inspection intervals and keep spare assemblies available rather than relying on indefinite reuse.

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28S208-272N5

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Rosenberger

CONN QMA PLUG R/A 50OHM SOLDER

In Stock: 7244

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