A varistor (50) comprising: a feed-through conductor (52) and a varistor disc (72) interposed between, and electrically connected to, conductor layers disposed on opposite surfaces of the varistor disc (72), the conductor layers being electrically isolated from one another; wherein the varistor disc (72) comprises a through aperture (60) through which the feed-through conductor extends; a first one of the conductor layers is electrically connected to the feed-through conductor; a second one of the conductor layers is, in normal use, permanently electrically connected to ground the varistor (50). This configuration enables one side of the disc (72) to be connected to the feed-through terminal, and the other side of the disc (72) to be connected to a ground plane, such as an earthed bulkhead of a wall or cabinet, via a metal plate forming part of the varistor (50) housing.

Disclosed are an input/output terminal for connecting an electronic device to an external device and an electronic device comprising the input/output terminal, the input/output terminal comprising: a signal pin allowing signals to be transmitted/received between the electronic device and the external device; a ground pin connected to a ground part of the electronic device; and a resistant material disposed at the end part of the signal pin or the ground pin. Other various embodiments are possible.

In one embodiment, as apparatus includes a cable identifier for attachment to a plug and cable assembly operable to deliver Power over Ethernet (PoE) at a power greater than 90 watts, the plug and cable assembly receivable in a receptacle delivering the PoE. The cable identifier is configured for mating with the receptacle and includes an electrical identifier for use in identifying a power rating of the cable when the plug and cable assembly is inserted into the receptacle. A method and network device are also disclosed herein.

An electrical connector provided with a varistor, and to a protection device for incorporation into an electrical connector and having a varistor comprising at least two pins including a first pin which is a live (502) or neutral (504) pin and a second pin which is an earth pin (506), the first and second pins (502, 504, 506) extending through respective apertures (512) in a varistor plate (514) which has first and second faces, wherein a first conductive layer on the first face of the varistor plate (514) connects electrically to the first pin (502, 504) and a second conductive region on the second face of the varistor plate connects electrically to the second pin (506), so that in response to an excessive voltage across the first (502, 504) and second (506) pins the varistor plate will conduct electricity between the first (502, 504) and second (506) pins. The arrangement can easily be adopted in connectors conforming to existing standards, such as existing mains electrical plugs (500).

A dielectric member for controlling impedance for use in an electrical connector. The dielectric member including a housing made of dielectric material and a dielectric rib. The dielectric rib extends from a conductor receiving end of the housing in a direction away from a mating end. The rib is spaced equidistant from each of the conductor receiving openings. The rib extends in a direction which is essentially parallel to a longitudinal axis of the housing. Conductor engaging surfaces are provided on the rib, with a first conductor engaging surface of the conductor engaging surfaces being opposed to a second conductor engaging surface of the conductor engaging surfaces. The first conductor engaging surface and the second conductor engaging surface are spaced apart a distance, wherein the impedance of the conductors proximate the rib is approximately the same as the impedance of the cable.

A gardening tool with identification function including an operating unit and a working unit is provided. The operating unit includes a first main body, a first electrical connector, and an operating device. The first electrical connector is set at one end of the first main body. The operating device includes a processor electrically connected to the first electrical connector. The processor stores operating parameters. The working unit includes a second main body, a second electrical connector, a motor, and a work piece. The electrical property of the second electrical connector is corresponding to one operating parameter in the processor. When the second main body is connected to the first main body, the second electrical connector is electrically connected to the first electrical connector. The processor selects one operating parameter according to the electrical property of the second electrical connector to control the output rotational speed or power of the motor.

A loadbreak electrical connector includes a connector body having first and second passages therewithin and a safety probe configured to be installed within the first passage. The safety probe includes a conductive probe body extending between first and second ends, the probe body having a probe aperture at the second end and a probe pin connected to the probe body via the probe aperture. The safety probe includes an arc quenching section located at a distal end of the probe pin and has a resistance section located between the second end of the probe body and the arc quenching section. The resistance section is made of a highly resistance material which reduces current flow through this section of the safety probe.

A coupler, in particular a resistive coupler, wherein all ports are at least partially or completely arranged in or at a connector. The coupler comprises resistors which are adapted to sum and/or divide the incoming and/or outgoing signal. The resistors are arranged at or in the connector. A sum port and/or at least two dividing ports are arranged on a substrate.

Bidirectional detection is performed with a suppressed increase in return loss at an output terminal. A bidirectional coupler includes a detection port, a main line connected to a first port and a second port, a sub-line, a termination circuit, a switch circuit that switches each of one end and another end of the sub-line to the termination circuit or the detection port, and a matching network disposed between the switch circuit and the detection port and including at least one of a first variable capacitor, a first variable inductor, or a first variable resistor. In a first mode for detecting a first signal, the switch circuit connects the one end of the sub-line to the detection port, and connects the other end of the sub-line to the termination circuit.

Embodiments may relate to a connector. The connector may include a plurality of connector pins that are to communicatively couple an element of a printed circuit board (PCB) with an element of an electronic device when the element of the PCB and the element of the electronic device are coupled with the connector. The connector may also include an active circuit that is communicatively coupled with a pin of the plurality of pins. The active circuit may be configured to match an impedance of the element of the PCB with an impedance of the element of the electronic device. Other embodiments may be described or claimed.