N Jack (Female) to SMB Plug (Male) Adapter, DC-4GHz VSWR 1.17

N Jack (Female) to SMB Jack (Female) | Straight Adapter | Screw-Lock and Snap-Lock | Brass Body

The ROSNOL AD-N2S25A/H4-H1 is a straight RF adapter engineered for dependable interconnection between N jack female and SMB jack female terminations. It operates from DC to 4 GHz with 50-ohm impedance, VSWR ≤ 1.17, and insertion loss ≤ 0.05√F (GHz) dB. Electrical ratings include insulation resistance ≥ 1 GΩ, test voltage 750 V rms, working voltage ≤ 250 V rms at sea level, RF leakage ≥ 55 dB up to 1 GHz, and typical contact current 1.5 A DC. The adapter combines screw-lock coupling on the N side with snap-lock on the SMB side, provides axial center-contact captivation ≥ 10 N, and is rated for a minimum of 500 mating cycles on both sides. Recommended torque on the N side is 0.7–1.1 Nm, with a maximum coupling test torque of 1.7 Nm.

Materials and plating are optimized for durability. The SMB center contact is phosphor bronze with gold plating 3 microinch over a non-magnetic nickel-phosphorus underplating 80 microinch; the SMB body is brass with the same gold-over-nickel-phosphorus stack, and the insulator is PTFE. On the N side, the center contact is phosphor bronze with gold plating over nickel-phosphorus; the body is brass with copper-tin-zinc alloy finish, and the insulator is PTFE. The adapter operates from -55°C to +155°C.

ROSNOL’s precision-engineered RF adapters provide high quality and reliable performance at competitive pricing, making them practical alternatives to products from leading European and American brands. All ROSNOL RF components are manufactured in ISO 9001-certified facilities and meet RoHS and REACH requirements. Customization services for materials, plating, and mechanical design are available to meet specialized interconnect requirements.