10M Ohm 0.25 Watt Carbon Film Resistors - Pack of 10

Jargon buster

Plain-language definitions for the technical terms used above.

Axial

Axial components have one lead coming out of each end, so they lie flat or span holes on a circuit board or breadboard. This matters when checking whether the resistor will physically fit your prototyping or through-board assembly method.

ESD protection

ESD protection helps protect electronics from damage caused by static electricity discharges. It is useful on development boards because cables, sensors and modules are often plugged and unplugged during prototyping.

High-impedance

Impedance is the opposition a circuit presents to current, so high-impedance means very little current flows. The term covers both a high-impedance input or node, which can sense a voltage without drawing it down (so very large resistors such as 10 megaohms are common), and the high-impedance (Hi-Z) state of a tri-state output, where a pin is effectively disconnected so other devices can drive a shared line.

Impedance

Impedance is the total opposition a component or circuit presents to alternating current, measured in ohms, combining resistance with frequency-dependent reactance. It appears in many contexts, such as matching a speaker's impedance (for example 4 ohm or 8 ohm) to an amplifier or the input and output impedance of signal circuits, and a correct match helps avoid weak signals, distortion or damage.

Leakage current

Leakage current is a small unwanted current that flows through insulation, components, or semiconductor inputs even when ideally no current should flow. Very high-value resistors can be used to detect or limit these tiny currents in sensitive circuits.

Op-amp

An op-amp, or operational amplifier, is a chip used to amplify, buffer, or compare analogue signals. Resistor values around an op-amp help set gain and input behaviour, so choosing the right resistance matters for stable circuit performance.

through-hole

A mounting style where the component leads pass through holes in a circuit board and are soldered on the other side. Through-hole parts are often easier to handle and solder by hand, which is useful for classroom and hobby projects.

Tolerance

Tolerance tells you how far the real resistance value may be from the printed value. A 1% resistor is useful when a circuit needs more predictable behaviour than a looser 5% or 10% part.