MFG Part Number 387004920
HiTemp ETX Series Thermoelectric Cooler
The ETX4-7-F1-2323-L-RT-W6 high temperature, high-performance thermoelectric cooler uses Laird Thermal Systems' enhanced thermoelectric module construction preventing performance degrading diffusion, which is common in standard grade thermoelectric coolers operating in high temperature environments exceeding 80 °C. It has a maximum Qc of 21.7 Watts when ΔT = 0 and a maximum ΔT of 83.2 °C at Qc = 0.

You can interact with the Performance Curves below to estimate the cooling performance by entering the thermal and electrical operating conditions for your application.
Click the [Save Changes] button to create a Customized PDF Datasheet.
Please Note: Actual application performance will vary from calculated values based on actual thermal design characteristics.

Electrical and Thermal Performance

Use the sliders, input fields and [UPDATE] button below to enter your application's electrical and thermal conditions. Use the Graph Y and X Axis buttons to display a variety of performance curves and use the Voltage/Current slider to choose the electrical operating point to display performance.
Click [Save Changes] button to save your results as a Customized PDF Datasheet.

Selected Operating Point
Cooling Power (Qc) = Watts
Current = Amps
Voltage = Volts
Power Supply = Watts
Power Dissipated (Qh) = Watts
Thot = °C
Optimum COP
Cooling Power (Qc) = 2.23 Watts
Current = 0.52 Amps
Voltage = 1.33 Volts
Power Supply = 0.7 Watts
COP = 3.2
Power Dissipated (Qh) = 2.93 Watts
Maximum Qc
Cooling Power (Qc) = 17 Watts
Current = 4.49 Amps
Voltage = 8.77 Volts
Power Supply = 39.41 Watts
COP = 0.43
Power Dissipated (Qh) = 56.41 Watts

Select Graph
Y - Axis

Select Graph
X - Axis

Imin: 0.2 A
Imax: 4.5 A

Vmin: 0.8 V
Vmax: 8.8 V
Click UPDATE to view changes in thermal operating conditions
Control Temp  
Ambient Temp  
Δ T  
Hot Side Thermal Resistance  
Cold Side Thermal Resistance  

Hot Side Temperature
50.0 °C
85.0 °C
110.0 °C
Qcmax (ΔT = 0)
21.7 Watts
23.5 Watts
24.2 Watts
ΔTmax (Qc = 0)
Imax (I @ ΔTmax)
4.0 Amps
3.8 Amps
3.7 Amps
Vmax (V @ ΔTmax)
9.3 Volts
10.7 Volts
11.6 Volts
Module Resistance
2.18 Ohms
2.55 Ohms
2.79 Ohms
Max Operating Temperature
150 °C
6.0 gram(s)

* Specifications reflect thermoelectric coefficients updated March 2020

Finishing Options
Flatness / Parallelism
Hot Face
Cold Face
Lead Length
3.200 ±0.254 mm
0.126 ± 0.0100 in
0.004 mm / 0.004 mm
0.00015 in / 0.00015 in
152.4 mm
6.00 in
Sealing Options
Temp Range
Translucent or White
-60 to 204°C
Non-corrosive, silicone adhesive
  1.  Max operating temperature: 150°C
  2.  Do not exceed Imax or Vmax when operating module
  3.  Reference assembly guidelines for recommended installation

Any information furnished by Laird and its agents, whether in specifications, data sheets, product catalogues or otherwise, is believed to be (but is not warranted as being) accurate and reliable, is provided for information only and does not form part of any contract with Laird. All specifications are subject to change without notice. Laird assumes no responsibility and disclaims all liability for losses or damages resulting from use of or reliance on this information. All Laird products are sold subject to the Laird Terms and Conditions of sale (including Laird’s limited warranty) in effect from time to time, a copy of which will be furnished upon request.

© Copyright 2019-2021 Laird Thermal Systems, Inc. All rights reserved. Laird™, the Laird Ring Logo, and Laird Thermal Systems™ are trademarks or registered trademarks of Laird Limited or its subsidiaries.

Date: 12/03/2021