Tunnel Series DAT‐040‐12‐02‐00‐00
Direct‐to‐Air Thermoelectric Assembly
Americas: +1.919.597.7300
Europe: +46.31.420530
Asia: +86.755.2714.1166
ets.sales@lairdtech.com
www.lairdtech.com
The Tunnel Series Direct‐to‐Air thermoelectric assembly is a
thermoelectric based air conditioner designed to temperature
control small chambers used in analytical and medical
diagnostic instruments. The unique design offers premium
fans pushing air across‐high density heat sinks to minimize the
number of air flow paths required to operate. The design
utilizes custom thermoelectric modules to maximize cooling
capacity with a high coefficient of performance. Moisture
resistant insulation is used to keep condensation from
penetrating the TEM cavity. The units operate on DC and are
designed for an indoor lab use environment.
Laird Part Number: 387000848
FEATURES
APPLICATIONS
Compact form factor
Analytical storage
compartment temperature
Improved sealing for moisture
control
protection
Reliable solid‐state operation
Medical diagnostic chamber
refrigeration
RoHS compliant
SPECIFICATIONS
TEA Model
Heat Transfer, Cold Side
Heat Transfer, Hot Side
Cooling Power
TEM Input Power
Voltage, Nominal
Current, Nominal
Fan Input Power
Voltage, Nominal
Current, Nominal
Dimension (L x W x H)
Weight
Operating Temperature
Packaging
DAT,040,12,02,00,00
Direct
Air
40 W @ ΔT=0°C and Ta=35°C, Tolerance ± 10%
12 VDC
2.9 Amps @ Δ T=0°C
12 VDC
0.23 Amps
155 x 65 x 86 mm
0.8kg
‐10°C to 50°C
Individual cardboard box
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DAT‐040‐12‐02‐00‐00
INSTALLATION INSTRUCTIONS
1. For operation below dew point, recommend to position unit in vertical direction with wires
facing down to allow for condensation to run off of unit. Drop tray may be required to collect
moisture from surfaces at temperatures below dew point.
2. TE should not be used as part of the structure and is recommended to be protected from
external forces.
3. The input power to TEA should be protected with fuse. Fuse rating should withstand 150% of
nominal current rating for 60 seconds. This is valid at Ta=35°C. Fuse ratings for other ambient
temperatures (x°C) can be calculated with the formula I [x°C] = I [35°C]/(1+0.005*(x‐35). This is
valid when regulating with an On/Off regulation. At rapid temperature cycling where this is
applicable, there can be a need for even higher fuse ratings.
4. Max ripple current on supply power should be ≤ 5%.
5. Switching power to TEMs at frequencies between 0.01Hz to 5KHz may degrade reliability and
shorten life.
SERVICE
Units are generally maintenance free, however occasionally it is recommended to clean the heat
sinks and fans of debris. This is best done with compressed air.
LAIRD‐TS‐DAT‐040‐12‐02‐00‐00‐DATA‐SHEET‐101217
Any information furnished by Laird Technologies, Inc. and its agents is believed to be accurate and reliable. All specifications are subject to
change without notice. Responsibility for the use and application of Laird Technologies materials rests with the end user. Laird Technologies
makes no warranties as to the fitness, merchantability, suitability or non‐infringement of any Laird Technologies materials or products for any
specific or general uses. Laird Technologies shall not be liable for incidental or consequential damages of any kind. All Laird Technologies
products are sold pursuant to the Laird Technologies’ Terms and Conditions of sale in effect from time to time, a copy of which will be furnished
upon request. © Copyright 2017 Laird Technologies, Inc. All Rights Reserved. Laird, Laird Technologies, the Laird Technologies Logo, and other
marks are trademarks or registered trademarks of Laird Technologies, Inc. or an affiliate company thereof. Other product or service names may
be the property of third parties. Nothing herein provides a license under any Laird Technologies or any third party intellectual property rights.
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