Resistor Trimmer Packages:
'A', 'B', 'C', 'D/E', 'F-L', 'M', 'N', 'O', 'P', 'R', 'S', 'T', 'V-Z'
Trimmer: A variable resistor. Designed for less then frequent changes [occasional]~ a trim pot on a PCB to finalize a circuit resistance. A Trimmer may be Single Turn or Multiturn, or surface mount or through-hole.
There are a number of common package styles, of which a number are shown below [Through-hole]. Note that the actual package style make little difference in the circuit operation. Refer here for Surface Mount Trimmer Resistors.
Square Body Trimmer
One of the most common body styles used for resistor trimmers. The actuator will either be top mount or side mount. With the leads or terminals in-line with each other or off-set.
Top mount actuator. Top mount trimmer resistors are used when the trimmer may be mount near the edge of the Printed Circuit Board [PCB], or when the board density is to great to allow a side adjustment.
Trimmer, Off-set Leads, RJ26 Style
Side mount actuator [Rectangular body]. Side mount trimmers are normally used near the edge of a Printed Wiring Board [PWB]. A side mount trimmer allows for adjustments from the side of the PWB.
Trimmer, In-line Leads, RJ24 Style
Side mount actuator [Square body]. This is basically the same style trimmer as above, but with a lower profile. Of course the price of the reduced height profile is increased board area.
Trimmer, Off-set Leads, RJ26 Style
Round Body Trimmer
Trimmers with a round body are the same as ones with a square body, only the body shape changes.
Trimmer, Trim Pot
Rectangular Body Trimmer
This particular body style uses a lead-screw to change the resistance. This trimmer style also has the largest body of the trimmers shown on this page.
Trimmer, Trim Pot
The trimmer in a rectangular package may also be purchased with wire leads instead of terminals [RJ12 style]. The larger body allows for a larger power dissipation [rated power].
