BNC Matching Pad 75 Ohm to 50 Ohm DC-2 GHz Plug to Jack

Product Description

Part number: MP-BM75BF50-0/2G — JyeBao, RoHS compliant.

A minimum-loss resistive matching pad for transitioning between a 75-ohm system and a 50-ohm system at the connector interface. One end is a 75Ω BNC plug (male pin) for mating to a 75Ω source or cable; the other is a 50Ω BNC jack (female socket) for a 50Ω load or instrument port. Operating range is DC to 2 GHz.

Typical applications

• Connecting 75Ω video, CATV or broadcast equipment to 50Ω spectrum analysers, signal generators or VNAs
• Terminating 75Ω cable runs into 50Ω measurement chains without introducing large reflections
• General lab interop between mixed 50/75Ω test gear

Key specifications

• Frequency range: DC to 2 GHz
• VSWR: 1.1 @ 0.5 GHz · 1.15 @ 1 GHz · 1.3 @ 2 GHz
• Insertion loss: approximately 5.7 dB, inherent to any resistive 50/75 matching pad. The datasheet also tabulates voltage-division ratios of 4 dB (50→75 direction) and 7.5 dB (75→50 direction); these are voltage ratios reflecting the different port impedances, not additional power loss.
• Power rating: 0.5 W continuous
• Operating temperature: −30°C to +70°C
• Dimensions: 53 mm overall length × Ø14.5 mm body
• Materials: Teflon insulator, brass body and coupling nut (tin-zinc-copper-alloy plating), phosphor bronze centre pin (gold over nickel-phosphorus plating), silicone gasket

Worth knowing before you buy

• The ~5.7 dB loss is physics, not a manufacturer limitation — it’s the minimum achievable with a resistive L-pad between 50 and 75Ω. If your application can’t tolerate it, you likely want an impedance-matching transformer instead (narrower bandwidth, lower loss).
• Check the gender: the 75Ω side is a plug (male), the 50Ω side is a jack (female). The reverse orientation (MP-BF75BM50) and other gender/impedance combinations in the JyeBao family can be sourced on request.
• BNC 75Ω and 50Ω connectors are mechanically intermateable — the pad will physically fit any BNC port, but the match only works if the 75Ω face connects to your 75Ω equipment and the 50Ω face to your 50Ω equipment.

JyeBao datasheet (PDF)

Unsure whether a resistive pad or a transformer is right for your measurement setup? Email sales@rfshop.co.uk.