Belden 1855ENH.10100 Mini RG-59 75 Ohm SDI Coaxial Cable, LSZH, 100m Green

Please note: this is a non-returnable item (excluding faulty goods)

Belden 1855ENH.10100 is a 100 metre reel of green 1855ENH cable: 75 ohm mini RG-59 SDI coax with a 22 AWG solid bare copper conductor, a foil-plus-braid screen and an LSZH jacket.

This is bulk cable on a reel, not a made-up lead, so there are no connectors on it and you cut and terminate to length on site. The 1855ENH is Belden's low smoke zero halogen version of its miniature serial digital video coax. The core is the same as the rest of the 1855 family: 75 ohm, 22 AWG solid bare copper in a foam polyethylene dielectric.

The jacket is LSZH, classified Dca-s1,d1,a1 under the Construction Products Regulation for both the EU and the UK. At 4.45 mm outside diameter it is appreciably thinner than a standard RG-59. That is the whole point of the mini format: it bends into tighter runs, fills less containment and dresses more neatly into a rack.

Belden's own variants table lists this exact part number, 1855ENH.10100, as the green 100 metre reel, EAN 8719605004383.

Key points

• 100 m green reel: Belden's published variants table lists 1855ENH.10100 as the green, 100 metre reel put-up of 1855ENH, EAN 8719605004383.
• 75 ohm SDI coax: Nominal characteristic impedance 75 ohm, velocity of propagation 84%, and nominal conductor-to-shield capacitance of 53 pF/m (16 pF/ft).
• Mini RG-59 format: The finished jacket is 4.45 mm (0.175 in) nominal diameter, so it pulls into tighter containment and dresses more easily than a full-size RG-59.
• 22 AWG solid bare copper: One 0.65 mm solid bare copper conductor in foam polyethylene insulation at 2.9 mm nominal diameter, with a maximum conductor resistance of 55 ohm/km.
• Double screened: A 100% tri-laminate aluminium/polyester/aluminium tape under a 90% tinned copper braid, giving screening class B and at least 85 dB screening attenuation from 30 MHz to 1000 MHz.
• LSZH jacket: Low smoke zero halogen and flame retardant to IEC 60332-1-2 and CEI 20-35/1. Halogen free to IEC 62821-1, with zero halogen content to IEC 60754-1. Minimum smoke transmittance is 60% to IEC 61034-2.
• CPR Euroclass Dca-s1,d1,a1: Classified Dca-s1,d1,a1 under both the EU CPR and the UKCA scheme, and CE and UKCA marked.
• Characterised to 4.5 GHz: Belden publishes nominal attenuation from 1 MHz to 4500 MHz. Return loss is at least 23 dB from 5 MHz to 1600 MHz, and 21 dB from 1600 MHz to 4500 MHz.
• Rated to 6 Gb/s: Belden lists digital video, 6 Gb/s UHDTV and HD-SDI 1080p among the suitable applications for this cable.
• Handling limits: Operating range -30 °C to +70 °C, installation -5 °C to +50 °C, 45 mm minimum stationary bend radius and a maximum pull tension of 160 N (36 lbf).

Where this is used

Serial digital video is the obvious home for this cable. It suits studio and outside-broadcast tie lines, production galleries, edit suites and control rooms. It also suits any rack where a lot of SDI has to be dressed into a small space.

The 100 metre reel is the size you buy for a patch field, a rack build or a single room, rather than a building-wide first fix. It is sold as bulk cable, so you cut each run to length and crimp or compress your own 75 ohm BNCs. The LSZH jacket and the Dca-s1,d1,a1 CPR classification are the reason to choose this version over a standard PVC 1855.

In UK escape routes, risers, plant rooms and public buildings, the specification usually calls for a low smoke zero halogen cable with a declared Euroclass. A PVC equivalent will not satisfy it. One caveat before you order.

Belden lists this cable as suitable for indoor and outdoor use. But its sunlight-resistance listing under UL 1581 section 1200 applies to the black jacket only. For a run in permanent direct sunlight, specify the black put-up rather than this green one.