Teledyne's TO-5 DPDT relays have become one of the industry standards for low level switching from dry circuit to 1 Amp. Designed for use when close PCB spacing is required, the 732 series have a low coil power dissipation in an sub-miniature relay package.
With a low inter-contact capacitance and contact circuit losses, the 732 series of TO-5 relays are an excellent sub-miniature RF switch for frequencies well into the UHF spectrum (see datasheet for performance curves). In addition to the standard types there are the 732D relays which have an internal discrete silicon diode that provides coil transient suppression.
A typical RF application for the TO-5 relay is in hand held radio transceivers, the combined features of good RF performance, small size, low coil power dissipation and high reliability make it a preferred method of Transmit/Receive switching.

Hermetically sealed
High resistance to shock and vibration
Gold plated contacts
Low insertion loss - isolation and intercontact capacitance of 0.4pF
Uni-frame design provides high magnetic efficiency and mechanical rigidity
High reliability and excellent resistance to environmental extremes