3059Y-1-500LF Bourns Inc., 3059Y-1-500LF Datasheet - Page 150

• Manufacturer Part Number: 3059Y-1-500LF
• Description: TRIMPOT 50 OHM 1.25"REC CER MT
• Manufacturer: Bourns Inc.
• Series: 3059 - Sealedr

Specifications of 3059Y-1-500LF

• Temperature Coefficient: ±100ppm/°C
• Resistance (ohms): 50
• Termination Style: PC Pin
• Power (watts): 1W
• Tolerance: ±10%
• Number Of Turns: 22
• Adjustment Type: Side Adjustment
• Resistive Material: Cermet
• Mounting Type: Chassis Mount
• Package / Case: Rectangular - 1.250" L x 0.190" W x 0.315" H (31.75mm x 4.83mm x 8.00mm)
• Track Resistance: 50ohm
• No. Of Turns: 22
• Resistance Tolerance: ± 10%
• Power Rating: 1W
• Potentiometer Mounting: Through Hole
• Resistance: 50 Ohms
• Operating Temperature Range: - 55 C to + 150 C
• Element Type: Cermet
• Dimensions: 6.10 mm W x 31.75 mm L
• Product: Trimmers
• Taper: Linear
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

Applications/Processing Guide – Standard and Lead Free
Adjustment Screw
Resistive Element
148
How to Use This Section
This Applications/Processing Guide is intended to provide you with points to consider
for designing circuits, selecting trimmers and arranging board layouts, to achieve
maximum performance and long life for your circuits and systems. We have also
included information on steps your manufacturing engineers can take to preserve
circuit reliability.
For example, are you aware that the trimmers and other mechanical components on
your boards may face a more extreme environment during boardwashing on your
own production line, than they ever will in use? For those trimmers that may need to
be reset, are you remembering to select and mount the trimmers to provide easy
accessibility?
In this section, you'll find dozens of pointers, reminders and useful facts that will help
you be more knowledgeable and successful in using trimmers.
Resistive Element
Wiper
Wiper
Wiper
Adjustment Rotor
Adjustment Screw
Resistive Element
Trimmer Basics
In its most common form, a trimmer is
simply a device containing a resistive
element, and a wiper, or adjustable tap,
contacting the element. The wiper can be
mechanically moved to vary the amount of
voltage or resistance in the circuit. The
resistive element is usually laid out in
linear or a circular configuration.
The Resistive Element
Trimmers for commercial applications
typically have a resistive element made of
carbon or cermet (a combination of
CERamic and METal), or of resistance
wire wound on an insulated copper
mandrel.
The main advantages of wirewound
trimmers are their low temperature
coefficient, higher power dissipation, lower
noise, tighter resistance tolerance, and,
when used as a variable resistor, the
excellent current-carrying capacity
through the wiper due to the lower contact
resistance. Also, their long-term resistance
stability with time and temperature is
slightly better than cermet.
Cermet trimmers provide a wider
resistance range (10 ohms to 5 megohms,
versus a maximum of 50K ohms for
wirewound). Also, the wiper output can be
set closer to the desired value since the
resistive element presents a continuous
contact surface for the wiper, as opposed
to the discrete turns (resolution) of the
wirewound. Other advantages with cermet
are the lower reactance in high-frequency
applications, the smaller sizes available,
and the generally lower price than
wirewound types.