SUBMINIATURE COAXIAL CONNECTORS
BMR-Spring
GENERAL
• Robust
• 50 Ω
• DC – 8 GHz
• High power up to 350W at 2.7 GHz
• Board-to-board distance misalignment at
least 0.078” (2 mm), custom misalignment of 3 mm+
• Tilt misalignment 6° max
APPLICATIONS
• Broadcast
• RF components
• Wireless communications
• Military equipment
Board-to-board connectors are becoming more and more popular for the use in
RF equipment, which makes the system extra compact, reliable and cost effective
compared to the traditional cable assembly solutions. Even in very high power
and high frequency applications, connecting boards, modules or panels by rigid
connectors are growing in popularity.
The high-performance and robust BMR-Spring can handle a minimum board-
to-board (or rack and panel) distance tolerance of 0.078” (2 mm) with custom
misalignment of 3 mm or more. It also features a 6° tilt (radial travel). It has an
operating frequency range of DC-8 GHz, a 1.1 max VSWR guaranteed up to 3 GHz,
and it can handle up to 350 watts of power at 2.7 GHz.
BMR-Spring also features a unique non-slotted spherical interface for improved
electrical performance, high vibration and shock resistance, and an 80dB of
shielding up to 3 GHz. A self-alignment mechanism makes the BMR-Spring
particularly ruggedized for blind-mate applications. The spring-loaded adapters
are symmetrical to avoid any assembly issues.
A typical BMR-Spring board-to-board system is made of three parts: slide-on
receptacle, symmetrical adapter, and snap-on receptacle.
Custom congurations are available for board-to-board, module-to-module or rack and panel applications.
BMR-Spring
Impedance 50Ω
Frequency DC – 8 GHz
Typical VSWR (board-to-board connection) 1.1 at 3 GHz
Insertion loss 0.1√FdB
Power handling 350W at 2.7 GHz
RF leakage -80dB to 3 GHz, radial misalignment 0 mm
Mating cycles 100 cycles
Minimum distance between PCB 30 mm
Radial misalignment tolerance 6° max
Axial misalignment tolerance At least 0.078” (2 mm),
custom misalignment of 3 mm+
Temperature range -40°C +120°C
Parts Materials Platings
Body Brass/Bronze NPGR/BBR
Male center contact Brass NPGR
Female center contact Beryllium copper NPGR
Gasket Silicon rubber
Insulator PTFE/PEEK
CHARACTERISTICS MATERIAL AND PLATINGS
NPGR: Nickel Phosphorous Gold Radiall
BBR: Bright Bronze Radiall
For detailed specictions, please refer to the
corresponding data sheet at www.radiall.com.
*For 30 mm board-to-board distance, custom
in-series adapters are available on demand.
STRAIGHT SNAP-ON MALE RECEPTACLE
STRAIGHT SLIDE-ON FEMALE RECEPTACLE
SAMPLE KIT
BETWEEN-SERIES ADAPTERS
IN-SERIES ADAPTER
Part Number Captive Center
Contact
Packaging Note
R328 424 002 Yes Tape and reel
250 pcs
SMT
R328 424 012 Yes Bulk 100 pcs SMT
Part Number Captive Center
Contact
Packaging Note
R328 424 500 Yes Tape and reel
250 pcs
SMT
R328 424 510 Yes Bulk 100 pcs SMT
Part Number Series Packaging
R191 569 000 BMR-Spring Female/
SMA Female
Unit
R191 971 100 BMR-Spring snap-on
Male/SMA Female
Unit
R191 972 100 BMR-Spring slide-on
Male/SMA Female
Unit
Part Number Series Packaging
R328 705 000* BMR-Spring
Female / BMR-
Spring Female
Bulk 100 pcs
Part Number Packaging
R328 895 000 Unit
D1C328TE May 2011
