© 2022
16
WTC32ND TEMPERATURE CONTROLLER
4-40 x 0.625”
nylon standoffs
(four provided)
Figure 12.
WTC32ND-EV Standoff Positioning
ATTACH THE HEATSINK & FAN
The WTC32ND is designed to handle currents as high
as 2.2 A and installing a heatsink and fan is optional
when using less than +5 V or 500 mA during operation.
A heatsink and/or fan is mandatory when driving currents
higher than 500 mA or operating above +5 V.
Refer to the online SOA calculator to determine the Safe
Operating Area and proper thermal solution for your
application. Wavelength’s temperature controller SOA
calculator is found here:
www.teamwavelength.com/support/design-tools/wtc-calculator/
Follow
to assemble the heatsink and fan to the
temperature controller.
Actual fan wire configuration may be different than
shown.
Fan can be rotated on the WTC so the location of the
wires matches your PCB.
Screw: 4-40 PHPH
(x 0.75” w/o FAN)
(x 1” with FAN)
30 mm FAN
WXC303 (+5 VDC) or
WXC304 (+12 VDC)
WHS302 Heatsink
WTW002
Thermal Washer
WTC32ND
Heat Spreader
Air Flow
Figure 13. Attaching the WEV Thermal Components
Clean all of the mating surfaces on the WTC electronics
component and heatsink. It is important that no particulates or
foreign matter are on either surface.
Attach the adhesive side of the thermal washer to the bottom
of the heatsink, aligning the washer holes with the heatsink
holes.
If a fan is required, align the fan with the heatsink. The direction
of air flow, as indicated on the fan, is into the heatsink.
Attach the heatsink and fan assembly to the temperature
controller heat spreader, using two screws.
Connect the fan leads to Terminal Block 2 (TB2), securing
with a small flat head screwdriver. The red wire connects to
FAN (+) and the black wire to FAN (-).
The fan connects to the V
DD
supply, not V
S
, so be sure that the
correct voltage fan is selected, 5 VDC or +12 VDC.
