31332 Surge Protection Kit, Type N to BNC, 100 to 512 MHz


The 31332 is an RF surge protection kit with flange mounting bracket. It may be flange-mounted to an enclosure backplate or bulkhead-mounted through an enclosure wall. One side of the surge protector connects to a radio with a BNC antenna connection. The other side connects to an antenna/antenna coaxial cable with Type N connector. This kit includes:

  • RF protector with hardware, suitable for 100 to 512 MHz
  • Flange mounting bracket
  • 18 in. Type N to BNC coaxial jumper
  • 24 in. ground wire assembly

Note: For a pre-installed, bulkhead-mounted version of this same kit, see the 31330 Bulkhead Surge Protection Installed in Enclosure, Type N to BNC, 100 to 512 MHz.



Coaxial Jumper

Connector 1 Type N plug
Connector 2 BNC plug
Cable Type RG174/U
Length 45.7 cm (18 in.)


Performance Design Superior coil inductor surge performance design
Weatherproof Weatherproof when installed
Frequency 100 to 512 MHz
Connectors Type N jack
Mounting Bulkhead or flange mount
Operation DC block (RF only)
Insertion Loss < 0.1 dB
Maximum Surge
  • IEC 61000-4-5 8/20 μs waveform
  • 20 kA
Temperature -50° to +85°C
Standards CE compliant, RoHS compliant, IEC 60529 IP67, Bellcore #TA-NWT-000487
Type N Connector Length 2.41 cm (0.95 in.)
Dimensions 9.27 x 7.16 x 3.55 cm (3.65 x 2.82 x 1.40 in.)
Weight 226.8 g (0.5 lb)

Flange Mount

Material Aluminum with stainless-steel screws, nuts, and washers
Dimensions 3.81 x 2.54 x 2.85 cm (1.5 x 1.0 x 1.12 in.)

Ground Wire

Wire Type 12 AWG stranded with PVC jacket
Connector 5/8 crimp ring lug, soldered
Length 61 cm (24 in.)


Note: The following shows notable compatibility information. It is not a comprehensive list of all compatible or incompatible products.

Communication Devices

Product Compatible Note
RF300 (retired)
RF301 (retired)
RF302 (retired)
RF303 (retired)
RF304 (retired)
RF310 (retired)
RF312 (retired)
RF313 (retired)
ST-21 (retired)

Privacy Policy Update

We've updated our privacy policy.  Learn More

Cookie Consent

Update your cookie preferences.  Update Cookie Preferences